WO2023080861A1 - Soft switching auxiliary circuit for a half-bridge switching resonant inverter - Google Patents

Soft switching auxiliary circuit for a half-bridge switching resonant inverter Download PDF

Info

Publication number
WO2023080861A1
WO2023080861A1 PCT/TR2021/051157 TR2021051157W WO2023080861A1 WO 2023080861 A1 WO2023080861 A1 WO 2023080861A1 TR 2021051157 W TR2021051157 W TR 2021051157W WO 2023080861 A1 WO2023080861 A1 WO 2023080861A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit
switched
soft
bridge
resonant inverter
Prior art date
Application number
PCT/TR2021/051157
Other languages
French (fr)
Inventor
Fatih ZUNGOR
Aytac OZ
Metin OZTURK
Yunus Emre AKGUL
Original Assignee
Mamur Teknoloji Sistemleri San. A.S.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mamur Teknoloji Sistemleri San. A.S. filed Critical Mamur Teknoloji Sistemleri San. A.S.
Priority to PCT/TR2021/051157 priority Critical patent/WO2023080861A1/en
Publication of WO2023080861A1 publication Critical patent/WO2023080861A1/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/4815—Resonant converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0048—Circuits or arrangements for reducing losses
    • H02M1/0054—Transistor switching losses
    • H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Definitions

  • the invention relates to a soft-switched auxiliary circuit for a half-bridge switched resonant inverter capable of zero voltage crossing in the capacitive region, zero current crossing in the inductive region and operating in a wide load range.
  • An inverter is an electrical power converter that converts direct current (DC) to alternating current (AC).
  • the AC generated at the inverter output can be at any voltage and frequency depending on the selected transformers, the switching, and the control circuits.
  • the inverter consists of semiconductors that do not have any moving parts. It has a wide range of applications, from switching power supplies utilized in computers to large systems on the power grids. They are frequently used to convert DC from power sources such as solar panels, wind turbines, and batteries into AC in a controlled manner. In summary, inverters can convert DC to AC at the desired voltage, power, and frequency in a working principle completely opposite to AC-DC rectifiers.
  • EP3111722 discloses an induction heating cooker for heating a magnetically responsive or non-responsive cooking container, said induction heating cooker has an electric power converter comprising an inverter for converting voltage applied from a DC power source into high-frequency current, said inverter having a capacitive element, an induction heating coil and a switching circuit having a first and a second switching devices for effecting connection of the switching voltage to the induction heating coil.
  • the object of the invention is to provide a soft-switched auxiliary circuit for a half-bridge switched resonant inverter providing a wide range of power control.
  • the invention relates to a soft-switched auxiliary circuit for a half-bridge switched resonant inverter comprising a phase input; a resonant inverter connected to the phase input via a circuit path; a soft-switched circuit having at least one electronic circuit element tuned to operate on the resonant inverter above or below the resonant frequency; a half-bridge switching circuit enabling half-bridging to the soft-switched auxiliary circuit and converting the phase from an input to an alternating current phase output.
  • the soft-switched auxiliary circuit is arranged to conduct zero voltage transition in the capacitive region and zero current transition in the inductive region.
  • zero current transition or zero voltage transition corresponding to the incoming phase is provided with a resonant inverter.
  • the efficiency is ensured on the induction cookers with a resonant inverter that can operate with zero current passing and zero voltage transition.
  • the circuit is enabled when the switch interrupts.
  • the soft-switched auxiliary circuit has a parallel resonant auxiliary switching.
  • a soft switching formation can be achieved with the resonant connection of at least two switches from an auxiliary switching formed by the parallel resonance of the diode with the isolated gate bipolar transistor in the resonant inverter.
  • capacitive and inductive circuit elements are connected to the auxiliary circuit via the circuit path in order to provide soft switching.
  • the half-bridge switching circuit has one or more main switching with parallel resonance.
  • a half-bridge switching formation can be achieved with the resonant connection of at least two switches from a main switching formed by the parallel resonance of the isolated gate bipolar transistor, diode, and capacitor in the resonant inverter. Additionally, in order to do half-bridge switching, it is connected to the auxiliary circuit via the circuit path providing half-bridging.
  • the soft-switched auxiliary circuit is connected to the resonant inverter via the circuit path so that providing power control in the range of 100W to 10kW.
  • an auxiliary switching comprises a diode and an isolated gate bipolar transistor.
  • a main switching comprises a capacitor, a diode, and a polarized transistor with two insulated gates.
  • the operating frequency range of the circuit becomes much wider (in the range of 20-100 kHz) compared to passive suppression. This allows for the heating of metals with low ferromagnetic properties for induction hobs.
  • Figure 1 is the circuit diagram of a general illustration of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter according to the subject matter invention.
  • Figure 2 is an illustration of the circuit in conduction in the first operating zone of the soft- switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
  • Figure 3 is an illustration of the circuit in conduction in a second operating zone of the soft- switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
  • Figure 4 is an illustration of the circuit in conduction in a third operating zone of the soft- switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
  • Figure 5 is an illustration of the circuit in conduction in a fourth operating zone of the soft- switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
  • Figure 6 is the illustration of the circuit in conduction in a fifth operating zone of the soft- switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
  • Figure 7 is the illustration of the circuit in conduction in a sixth operating zone of the soft- switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
  • Figure 8 is an illustration of the circuit in conduction in the seventh operating zone of the soft- switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
  • Figure 9 illustrates the circuit in conduction in an eighth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
  • Figure 10 illustrates a ninth operating zone operating circuit for a soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the subject invention.
  • Figure 11 is the illustration of the circuit in conduction in a tenth operating zone of the soft- switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
  • Figure 12 illustrates the circuit in conduction in an eleventh operating zone of the soft- switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
  • Figure 13 illustrates the circuit in conduction in a twelfth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
  • Figure 14 illustrates the circuit in conduction in a thirteenth operating zone of the soft- switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
  • Figure 15 illustrates the circuit in conduction in a fourteenth operating zone of the soft- switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
  • Figure 16 illustrates the circuit in conduction in a fifteenth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
  • FIG. 1 the circuit diagram of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter, which is the subject of the invention, is generally shown.
  • the resonant inverter (10) consists of a soft-switched auxiliary circuit (12) and a bridge switching circuit (16), converting the phase (9) from a direct current input connected by half-bridging a soft-switched auxiliary circuit (12) to a soft-switched auxiliary circuit (12) into an alternating current phase output (50).
  • all transistors utilized in the present invention feature an isolated gate bipolar transistor (40) (44) (46).
  • the soft-switched auxiliary circuit (12) in the resonant inverter (10) makes a zero voltage transition in the capacitive region and zero current transition in the inductive region.
  • the soft-switched auxiliary circuit (12) is obtained by connecting an auxiliary switch (13), an inductor (28) and an auxiliary circuit upper capacitor (20) and an auxiliary circuit lower capacitor (22) in the circuit path (6), operating above or below the resonant frequency on the resonant inverter (10).
  • the auxiliary switching (13) comprising an auxiliary switching transistor (40) with parallel resonance connections to each other and an auxiliary switching diode (30) with parallel resonance connection to the auxiliary switching (13) with the direction of electrical conduction from anode to cathode.
  • the auxiliary switching (13) is connected via the circuit path (6) from the node where the capacitors (20, 22) are connected to each other in an electricity transmitting manner.
  • the negative end of the inductor (28) is connected to the output of the auxiliary switch (13) through the circuit path (6).
  • the half-bridge switching circuit (16) is connected via the circuit path, providing a half-bridging.
  • the half-bridge switching circuit (16) is formed by connecting an upper main switch (17) and a lower main switch (18) in the circuit path (6).
  • the upper main switching (17) consists of an upper main switching transistor (44), an upper main switching diode (36), and an upper main switching capacitor (26) with parallel resonance connections.
  • the circuit is completed by connecting the positive end of the inductor (28) via the circuit path from a node where the switches (17, 18) are connected to each other in a way that provides electricity flow.
  • the present invention provides the following advantages; •
  • a suppression cell is designed to operate with soft switching (12) in all operating regions (below and above the resonance frequency).
  • the soft switching cell can also be used with the AC-AC series resonant half-bridge inverter (10).
  • Figure 2 shows the circuit in conduction in the first operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
  • the circuit is the conduction range (17) of the upper switch (16) of the half-bridge resonant converters.
  • the upper main switching transistor (44) is in conduction.
  • Figure 3 shows the circuit in conduction in a second operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention.
  • the second operating zone begins when the auxiliary switching transistor (40) turns on. Due to the series inductance, the auxiliary switching transistor (40) switch turns on with zero current switching.
  • the auxiliary circuit upper capacitor (20) and the auxiliary circuit lower capacitor (22) transfer their energies to each other with the inductor (28). This interval ends when the current of the inductor (28) changes direction.
  • Figure 4 shows the circuit in conduction in a third operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention.
  • the diode (30) of the auxiliary switching (13) turns on.
  • the direction of the inductor (28) current changes and the sst main switching transistor (44) current decreases as the difference between the output current (50) and the inductor (28) current.
  • Figure 5 shows the circuit in conduction in a fourth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention.
  • the portion of the resonant current of the suppression cell (13, 28) that is more than the output current (50) puts the diode (34) of the upper main switching (17) switch on.
  • the transmit signal of the upper main switching transistor (44) needs to be cut off.
  • the upper main switching transistor (44) switch is turned off with zero current transition.
  • Figure 6 shows the circuit in conduction in a fifth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention.
  • the parasitic capacitor (24) of the upper main switching (17) switch is charging
  • the parasitic capacitor (26) of the lower main switching (18) switch is discharged and the energy is transferred to the main resonance circuit and the source.
  • the inductor (28) current remains constant.
  • the auxiliary circuit upper and lower capacitors (20, 22) are charged and discharged with the load current.
  • Figure 7 shows the circuit in conduction in a sixth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention.
  • the coil current ceases to pass constant current in the previous interval and continues to transfer the energy it has accumulated in the previous intervals to the auxiliary circuit upper and lower capacitors (20, 22).
  • the sub-switching diode (36) initiate conduction with zero current switching.
  • the auxiliary circuit upper capacitor (20) and the auxiliary circuit lower capacitor (22) have voltages (Input voltage + (Input voltage I 2)) and (Input voltage 12), respectively.
  • Figure 8 shows the circuit in conduction in the seventh operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention. This range begins with the sub-master switching diode (36) taking over the output current (50) and becomes one of the operating zones of the main resonant circuit.
  • the diode current converges 0 over the time in this range, and prior to 0, the sub-main switching transistor (46) signal has to be sent.
  • Figure 9 shows the circuit in conduction in an eighth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention. This is the range in which the sub-master switching (18) is activated. It is one of the four ranges in the inductive operating region of the half-bridge resonant transducer. The resonant current (9) of the main converter has changed direction and continues to flow through the sub-main switching (18).
  • Figure 10 shows a circuit in conduction in the ninth operating zone of a soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention.
  • This range begins with the signaling of the auxiliary switching transistor (40).
  • Auxiliary circuit upper capacitor (20) and auxiliary circuit lower capacitors (22) have (Input voltage + (Input voltage/2)) and (Input voltage/2) voltages, respectively, and when the switch (40) turns on, they start to transfer these energies to the inductor (28).
  • the auxiliary switching transistor (40) turns on with zero current switching in this range. In this range, the current of the sub-main switching transistor (46) decreases with increasing resonance current.
  • Figure 11 shows the circuit in conduction in a tenth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention.
  • the sub-master switching diode (36) is activated.
  • the drive signal of the submaster switching (18) is cut off. By cutting the signal, the sub-main switching transistor (36) breaks with zero current.
  • Figure 12 shows the circuit in conduction in an eleventh operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention.
  • the diode (36) of the sub-main switching (18) is turned off with zero current switching.
  • Parasitic capacitors (24, 26) and auxiliary circuit capacitors (20, 22) belonging to the upper and lower main switching (17, 18) transfer their energies to the source and the main resonance circuit with the load current in this range.
  • the inductor (28) allows a constant current in this range.
  • Figure 13 shows the circuit in conduction in a twelfth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention.
  • the diode (46) of the lower main switching (18) turns on with a zero current switching, and the energy in the inductor (28) is transferred to the auxiliary circuit upper and lower capacitors (20, 22) by resonance.
  • Figure 14 shows the circuit in conduction in a thirteenth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention.
  • the current of the inductor (28) changes direction and the signal of the auxiliary switching transistor (40) is cut off.
  • the auxiliary switching transistor (40) turns off with a zero current switching in this range, and the diode (30) of the transistor (40) turns on with a zero current switching.
  • the energy in the inductor (28) is transferred to the auxiliary circuit upper and lower capacitors (20, 22).
  • the energy of the main resonance circuit (16) is transferred to the DC phase input (8).
  • Figure 15 shows the circuit in conduction in a fourteenth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention. This range starts with the assignment of the incoming input (9) current when the upper main switching diode (34) and becomes one of the operating zones of the main resonant circuit. The diode (34) current converges 0 over time, but without a 0 value, the upper main switching transistor (44) must be signaled.
  • Figure 16 shows the circuit in conduction in a fifteenth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention.
  • This range is the transmission range of the upper switch (17) of half-bridge resonant converters.
  • the switching period returns to the beginning again.
  • the current of the main resonance changes direction.
  • the soft-switched auxiliary circuit is a circuit that operates when the switch (40, 44, 46) breaks. So it is a circuit that works when the switch is closed.

Abstract

The invention relates to a soft-switched auxiliary circuit for a half-bridge switched resonant inverter comprising a phase input (8); a resonant inverter (10) connected to the phase input (8) via a circuit path (6); a soft-switched circuit (12) having at least one electronic circuit element (20, 22, 28, 30, 40) tuned to operate on the resonant inverter (10) above or below the resonant frequency; a half-bridge switching circuit (16) enabling half-bridging to the soft-switched auxiliary circuit (12) and converting the phase (9) from an input to an alternating current phase output (50). The soft-switched auxiliary circuit (12) is arranged to conduct zero voltage transition in the capacitive region and zero current transition in the inductive region.

Description

SOFT SWITCHING AUXILIARY CIRCUIT FOR A HALF-BRIDGE SWITCHING RESONANT
INVERTER
TECHNICAL FIELD
The invention relates to a soft-switched auxiliary circuit for a half-bridge switched resonant inverter capable of zero voltage crossing in the capacitive region, zero current crossing in the inductive region and operating in a wide load range.
BACKGROUND OF THE ART
An inverter is an electrical power converter that converts direct current (DC) to alternating current (AC). The AC generated at the inverter output can be at any voltage and frequency depending on the selected transformers, the switching, and the control circuits.
The inverter consists of semiconductors that do not have any moving parts. It has a wide range of applications, from switching power supplies utilized in computers to large systems on the power grids. They are frequently used to convert DC from power sources such as solar panels, wind turbines, and batteries into AC in a controlled manner. In summary, inverters can convert DC to AC at the desired voltage, power, and frequency in a working principle completely opposite to AC-DC rectifiers.
As the need and interest in renewable energy sources increase, the application areas are growing rapidly in order to make the energy obtained from these sources suitable for use and present it to the consumer.
EP3111722 discloses an induction heating cooker for heating a magnetically responsive or non-responsive cooking container, said induction heating cooker has an electric power converter comprising an inverter for converting voltage applied from a DC power source into high-frequency current, said inverter having a capacitive element, an induction heating coil and a switching circuit having a first and a second switching devices for effecting connection of the switching voltage to the induction heating coil. BRIEF DESCRIPTION OF THE INVENTION
The object of the invention is to provide a soft-switched auxiliary circuit for a half-bridge switched resonant inverter providing a wide range of power control.
In order to achieve the aforementioned objectives, the invention relates to a soft-switched auxiliary circuit for a half-bridge switched resonant inverter comprising a phase input; a resonant inverter connected to the phase input via a circuit path; a soft-switched circuit having at least one electronic circuit element tuned to operate on the resonant inverter above or below the resonant frequency; a half-bridge switching circuit enabling half-bridging to the soft-switched auxiliary circuit and converting the phase from an input to an alternating current phase output. The soft-switched auxiliary circuit is arranged to conduct zero voltage transition in the capacitive region and zero current transition in the inductive region. Thus, zero current transition or zero voltage transition corresponding to the incoming phase is provided with a resonant inverter. The efficiency is ensured on the induction cookers with a resonant inverter that can operate with zero current passing and zero voltage transition. The circuit is enabled when the switch interrupts.
In a preferred embodiment of the invention, the soft-switched auxiliary circuit has a parallel resonant auxiliary switching. Thus, a soft switching formation can be achieved with the resonant connection of at least two switches from an auxiliary switching formed by the parallel resonance of the diode with the isolated gate bipolar transistor in the resonant inverter. Additionally, capacitive and inductive circuit elements are connected to the auxiliary circuit via the circuit path in order to provide soft switching.
In a preferred embodiment of the invention, the half-bridge switching circuit has one or more main switching with parallel resonance. Thus, a half-bridge switching formation can be achieved with the resonant connection of at least two switches from a main switching formed by the parallel resonance of the isolated gate bipolar transistor, diode, and capacitor in the resonant inverter. Additionally, in order to do half-bridge switching, it is connected to the auxiliary circuit via the circuit path providing half-bridging.
In a preferred embodiment of the invention, the soft-switched auxiliary circuit is connected to the resonant inverter via the circuit path so that providing power control in the range of 100W to 10kW. Thus, a wide range of power control in the resonant inverter can be achieved by the soft-switched auxiliary circuit. In a preferred embodiment of the invention, an auxiliary switching comprises a diode and an isolated gate bipolar transistor. Thus, by creating an auxiliary switching circuit in accordance with the desired operating efficiency, it is ensured that the circuit can operate in a wide power range and that the main switches are cut off at zero current crossing with a single switching. In addition, the auxiliary switching operates as a suppression cell, creating extra current stress on the main switching.
In a preferred embodiment of the invention, a main switching comprises a capacitor, a diode, and a polarized transistor with two insulated gates. Thus, the operating frequency range of the circuit becomes much wider (in the range of 20-100 kHz) compared to passive suppression. This allows for the heating of metals with low ferromagnetic properties for induction hobs.
BRIEF DESCRIPTION OF THE FIGURES
Figure 1 is the circuit diagram of a general illustration of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter according to the subject matter invention.
Figure 2 is an illustration of the circuit in conduction in the first operating zone of the soft- switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
Figure 3 is an illustration of the circuit in conduction in a second operating zone of the soft- switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
Figure 4 is an illustration of the circuit in conduction in a third operating zone of the soft- switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
Figure 5 is an illustration of the circuit in conduction in a fourth operating zone of the soft- switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
Figure 6 is the illustration of the circuit in conduction in a fifth operating zone of the soft- switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention. Figure 7 is the illustration of the circuit in conduction in a sixth operating zone of the soft- switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
Figure 8 is an illustration of the circuit in conduction in the seventh operating zone of the soft- switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
Figure 9 illustrates the circuit in conduction in an eighth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
Figure 10 illustrates a ninth operating zone operating circuit for a soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the subject invention.
Figure 11 is the illustration of the circuit in conduction in a tenth operating zone of the soft- switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
Figure 12 illustrates the circuit in conduction in an eleventh operating zone of the soft- switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
Figure 13 illustrates the circuit in conduction in a twelfth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
Figure 14 illustrates the circuit in conduction in a thirteenth operating zone of the soft- switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
Figure 15 illustrates the circuit in conduction in a fourteenth operating zone of the soft- switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention.
Figure 16 illustrates the circuit in conduction in a fifteenth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention. DETAILED DESCRIPTION OF THE INVENTION
In this detailed explanation, the invention is explained without any limitation and only with reference to examples to better explain the subject matter.
In Figure 1 , the circuit diagram of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter, which is the subject of the invention, is generally shown. The soft-switched auxiliary circuit for a half-bridge switched resonant inverter, converting phase (9) from direct current input to alternating current phase output (50), which can be used, for example, in an induction heating hob and can provide an auxiliary circuit (12) for resonant inverters (10) and a resonant inverter (10) connected to the direct current phase input (8) via a circuit path (6). In the present invention, the resonant inverter (10) consists of a soft-switched auxiliary circuit (12) and a bridge switching circuit (16), converting the phase (9) from a direct current input connected by half-bridging a soft-switched auxiliary circuit (12) to a soft-switched auxiliary circuit (12) into an alternating current phase output (50). Also, all transistors utilized in the present invention feature an isolated gate bipolar transistor (40) (44) (46). The soft-switched auxiliary circuit (12) in the resonant inverter (10) makes a zero voltage transition in the capacitive region and zero current transition in the inductive region. The soft-switched auxiliary circuit (12) is obtained by connecting an auxiliary switch (13), an inductor (28) and an auxiliary circuit upper capacitor (20) and an auxiliary circuit lower capacitor (22) in the circuit path (6), operating above or below the resonant frequency on the resonant inverter (10). The auxiliary switching (13) comprising an auxiliary switching transistor (40) with parallel resonance connections to each other and an auxiliary switching diode (30) with parallel resonance connection to the auxiliary switching (13) with the direction of electrical conduction from anode to cathode. The auxiliary switching (13) is connected via the circuit path (6) from the node where the capacitors (20, 22) are connected to each other in an electricity transmitting manner. The negative end of the inductor (28) is connected to the output of the auxiliary switch (13) through the circuit path (6). From one positive end of the inductor (28), the half-bridge switching circuit (16) is connected via the circuit path, providing a half-bridging. The half-bridge switching circuit (16) is formed by connecting an upper main switch (17) and a lower main switch (18) in the circuit path (6). The upper main switching (17) consists of an upper main switching transistor (44), an upper main switching diode (36), and an upper main switching capacitor (26) with parallel resonance connections. The circuit is completed by connecting the positive end of the inductor (28) via the circuit path from a node where the switches (17, 18) are connected to each other in a way that provides electricity flow.
Additionally, the present invention provides the following advantages; • For the half-bridge series resonant inverter (10), which is one of the inverters (10) preferred at medium power in household induction cookers, a suppression cell is designed to operate with soft switching (12) in all operating regions (below and above the resonance frequency).
• Since the subject matter resonant inverter (10) can provide a wide power control range, it causes the input voltage (8) range to increase.
• Selecting the resonant frequency at higher values will allow the volume of the circuit elements (20) (22) (28) to be reduced.
• In this study, auxiliary switches (13) are exposed to lower voltage stresses in terms of voltage stresses.
• In this resonant inverter (10), the soft switching cell can also be used with the AC-AC series resonant half-bridge inverter (10).
Figure 2 shows the circuit in conduction in the first operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the subject matter invention. In the first operating zone, the circuit is the conduction range (17) of the upper switch (16) of the half-bridge resonant converters. The upper main switching transistor (44) is in conduction.
Figure 3 shows the circuit in conduction in a second operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention. The second operating zone begins when the auxiliary switching transistor (40) turns on. Due to the series inductance, the auxiliary switching transistor (40) switch turns on with zero current switching. The auxiliary circuit upper capacitor (20) and the auxiliary circuit lower capacitor (22) transfer their energies to each other with the inductor (28). This interval ends when the current of the inductor (28) changes direction.
Figure 4 shows the circuit in conduction in a third operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention. In this range, the diode (30) of the auxiliary switching (13) turns on. The direction of the inductor (28) current changes and the sst main switching transistor (44) current decreases as the difference between the output current (50) and the inductor (28) current.
Figure 5 shows the circuit in conduction in a fourth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention. Here, the portion of the resonant current of the suppression cell (13, 28) that is more than the output current (50) puts the diode (34) of the upper main switching (17) switch on. In this range, the transmit signal of the upper main switching transistor (44) needs to be cut off. In this range, the upper main switching transistor (44) switch is turned off with zero current transition.
Figure 6 shows the circuit in conduction in a fifth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention. In this range, while the parasitic capacitor (24) of the upper main switching (17) switch is charging, the parasitic capacitor (26) of the lower main switching (18) switch is discharged and the energy is transferred to the main resonance circuit and the source. During this interval, the inductor (28) current remains constant. The auxiliary circuit upper and lower capacitors (20, 22) are charged and discharged with the load current.
Figure 7 shows the circuit in conduction in a sixth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention. Here, the coil current ceases to pass constant current in the previous interval and continues to transfer the energy it has accumulated in the previous intervals to the auxiliary circuit upper and lower capacitors (20, 22). In this range, the sub-switching diode (36) initiate conduction with zero current switching. At the end of this range, the auxiliary circuit upper capacitor (20) and the auxiliary circuit lower capacitor (22) have voltages (Input voltage + (Input voltage I 2)) and (Input voltage 12), respectively.
Figure 8 shows the circuit in conduction in the seventh operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention. This range begins with the sub-master switching diode (36) taking over the output current (50) and becomes one of the operating zones of the main resonant circuit.
The diode current converges 0 over the time in this range, and prior to 0, the sub-main switching transistor (46) signal has to be sent.
Figure 9 shows the circuit in conduction in an eighth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention. This is the range in which the sub-master switching (18) is activated. It is one of the four ranges in the inductive operating region of the half-bridge resonant transducer. The resonant current (9) of the main converter has changed direction and continues to flow through the sub-main switching (18).
Figure 10 shows a circuit in conduction in the ninth operating zone of a soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention. This range begins with the signaling of the auxiliary switching transistor (40). Auxiliary circuit upper capacitor (20) and auxiliary circuit lower capacitors (22) have (Input voltage + (Input voltage/2)) and (Input voltage/2) voltages, respectively, and when the switch (40) turns on, they start to transfer these energies to the inductor (28). The auxiliary switching transistor (40) turns on with zero current switching in this range. In this range, the current of the sub-main switching transistor (46) decreases with increasing resonance current.
Figure 11 shows the circuit in conduction in a tenth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention. In this range, the sub-master switching diode (36) is activated. Also, in this range, the drive signal of the submaster switching (18) is cut off. By cutting the signal, the sub-main switching transistor (36) breaks with zero current.
Figure 12 shows the circuit in conduction in an eleventh operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention. At the beginning of this range, the diode (36) of the sub-main switching (18) is turned off with zero current switching. Parasitic capacitors (24, 26) and auxiliary circuit capacitors (20, 22) belonging to the upper and lower main switching (17, 18) transfer their energies to the source and the main resonance circuit with the load current in this range. The inductor (28) allows a constant current in this range.
Figure 13 shows the circuit in conduction in a twelfth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention. At the beginning of this range, the diode (46) of the lower main switching (18) turns on with a zero current switching, and the energy in the inductor (28) is transferred to the auxiliary circuit upper and lower capacitors (20, 22) by resonance.
Figure 14 shows the circuit in conduction in a thirteenth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention. In this range, the current of the inductor (28) changes direction and the signal of the auxiliary switching transistor (40) is cut off. The auxiliary switching transistor (40) turns off with a zero current switching in this range, and the diode (30) of the transistor (40) turns on with a zero current switching. With resonance, the energy in the inductor (28) is transferred to the auxiliary circuit upper and lower capacitors (20, 22). At the same time, the energy of the main resonance circuit (16) is transferred to the DC phase input (8). This interval ends when the diode (30) of the auxiliary switching (13) turns off with zero current switchings. At the point where the current of the inductor (28) is 0, the voltages of the upper and lower capacitors (20, 22) of the auxiliary circuit reach (Vin/2).
Figure 15 shows the circuit in conduction in a fourteenth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention. This range starts with the assignment of the incoming input (9) current when the upper main switching diode (34) and becomes one of the operating zones of the main resonant circuit. The diode (34) current converges 0 over time, but without a 0 value, the upper main switching transistor (44) must be signaled.
Figure 16 shows the circuit in conduction in a fifteenth operating zone of the soft-switched auxiliary circuit for a half-bridge switched resonant inverter of the invention. This range is the transmission range of the upper switch (17) of half-bridge resonant converters. The switching period returns to the beginning again. The current of the main resonance changes direction.
For a half-bridge switched resonant inverter of the subject matter invention, the soft-switched auxiliary circuit is a circuit that operates when the switch (40, 44, 46) breaks. So it is a circuit that works when the switch is closed.
REFERENCE NUMBERS
6 A circuit path 24 Upper main switching capacitor
8 DC phase input 26 Sub-main switching capacitor
9 Phase from DC input 28 Inductor
10 Resonant inverter 30 Auxiliary switching diode
12 Soft-switched auxiliary circuit 34 Upper main switching diode
13 Auxiliary switching 36 Sub-master switching diode
16 Half-bridge switching circuit 40 Auxiliary switching transistors
17 Upper main switching 44 Upper main switching transistor
18 Sub-master switching 46 Sub-master switching transistor
20 Auxiliary circuit upper capacitor 50 Alternating current phase output
22 Auxiliary circuit sub capacitor

Claims

1- A soft-switched auxiliary circuit for a half-bridge switched resonant inverter comprising a phase input (8); a resonant inverter (10) connected to the phase input (8) via a circuit path (6); a soft-switched circuit (12) having at least one electronic circuit element (20, 22, 28, 30, 40) tuned to operate on the resonant inverter (10) above or below the resonant frequency; a half-bridge switching circuit (16) enabling halfbridging to the soft-switched auxiliary circuit (12) and converting the phase (9) from an input to an alternating current phase output (50) characterized in that the soft- switched auxiliary circuit (12) is arranged to conducts zero voltage transition in the capacitive region and zero current transition in the inductive region.
2- An auxiliary circuit for a half-bridge switched resonant inverter according to Claim 1 , wherein the soft-switched auxiliary circuit (12) is having a parallel resonant auxiliary switching (13).
3- An auxiliary circuit for a half-bridge switched resonant inverter according to Claim 1 , wherein the half-bridge switching circuit (16) has one or more main switching (17) (18) with parallel resonance.
4- An auxiliary circuit for a half-bridge switched resonant inverter according to claims 1-2, wherein the soft-switched auxiliary circuit (12) is connected to the resonant inverter (10) via the circuit path (6) so that providing power control in the range of 100W to 10kW.
5- An auxiliary circuit for a half-bridge switched resonant inverter according to Claim 1-2, wherein an auxiliary switching (13) has a diode (30) and an isolated gate bipolar transistor (40).
6- An auxiliary circuit for a half-bridge switched resonant inverter according to claims 1-3, wherein a main switching (17) (18) comprises a capacitor (24) (26), a diode (34) (36), and a polarized transistor (44) (46) with two insulated gates.
PCT/TR2021/051157 2021-11-08 2021-11-08 Soft switching auxiliary circuit for a half-bridge switching resonant inverter WO2023080861A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/TR2021/051157 WO2023080861A1 (en) 2021-11-08 2021-11-08 Soft switching auxiliary circuit for a half-bridge switching resonant inverter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/TR2021/051157 WO2023080861A1 (en) 2021-11-08 2021-11-08 Soft switching auxiliary circuit for a half-bridge switching resonant inverter

Publications (1)

Publication Number Publication Date
WO2023080861A1 true WO2023080861A1 (en) 2023-05-11

Family

ID=86241567

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR2021/051157 WO2023080861A1 (en) 2021-11-08 2021-11-08 Soft switching auxiliary circuit for a half-bridge switching resonant inverter

Country Status (1)

Country Link
WO (1) WO2023080861A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080136343A1 (en) * 2005-08-11 2008-06-12 Yu Chung-Che Resonant DC/AC inverter
CN111969877A (en) * 2020-06-23 2020-11-20 湖南大学 Control method and device of half-bridge inverter
CN113162438A (en) * 2021-04-29 2021-07-23 长沙航特电子科技有限公司 Power supply conversion circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080136343A1 (en) * 2005-08-11 2008-06-12 Yu Chung-Che Resonant DC/AC inverter
CN111969877A (en) * 2020-06-23 2020-11-20 湖南大学 Control method and device of half-bridge inverter
CN113162438A (en) * 2021-04-29 2021-07-23 长沙航特电子科技有限公司 Power supply conversion circuit

Similar Documents

Publication Publication Date Title
Esteki et al. Interleaved buck converter with continuous input current, extremely low output current ripple, low switching losses, and improved step-down conversion ratio
WO2016130757A1 (en) Dc-dc converter
US9362846B2 (en) Soft switching inverter with auxiliary switch facilitating zero voltage switching
AU2011217688A1 (en) DC-DC converter circuit for high input-to-output voltage conversion
EP2949035B1 (en) Ac-ac converter device
WO2015023469A1 (en) Method and apparatus for multi phase shift power converter control
CN110176812B (en) Hybrid control apparatus and method
Bandeira et al. High voltage power supply using a T-type parallel resonant DC–DC converter
Komeda et al. A phase-shift-controlled direct AC-to-AC converter for induction heaters
US10141851B2 (en) Resonant DC to DC power converter
Guo et al. Analysis and design of a wide-range soft-switching high-efficiency high-frequency-link inverter with dual-phase-shift modulation
Endres et al. 6 kW bidirectional, insulated on-board charger with normally-off GaN gate injection transistors
EP3700074A1 (en) Dc-dc converter
Bharatiraja et al. Analysis, design and investigation on a new single-phase switched quasi Z-source inverter for photovoltaic application
CN110945770A (en) DC coupling electric converter
CN114204693A (en) Wireless power transmission system, wireless power transmission device and method
Narasimha et al. An improved closed loop hybrid phase shift controller for dual active bridge converter.
Ansari et al. COMPARATIVE EVALUATION OF Si MOSFET-BASED SOFT-SWITCHED DC-DC CONVERTERS AND GaN HEMT-BASED HARD-SWITCHED DC-DC CONVERTERS
Ting et al. Design and implementation of a flyback-assisted wide-range fully soft-switched T-type inverter
WO2016036783A1 (en) Extremely-sparse parallel ac-link power converter
WO2023080861A1 (en) Soft switching auxiliary circuit for a half-bridge switching resonant inverter
CN201821269U (en) Three-phase power supply with three-phase three-order direct current/direct current converter
Balakrishnan et al. Phase Shift Controlled Full Bridge DC-DC Converter with Less Circulating Loss
TWI543513B (en) Resonant converter
Shiogai et al. Split-mid-point modular design for low-load efficiency boost in WBG power converters

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21963451

Country of ref document: EP

Kind code of ref document: A1