CN104218809B - A kind of circuit device of integrated power factor correcting and DC-dc conversion - Google Patents
A kind of circuit device of integrated power factor correcting and DC-dc conversion Download PDFInfo
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- CN104218809B CN104218809B CN201310205542.8A CN201310205542A CN104218809B CN 104218809 B CN104218809 B CN 104218809B CN 201310205542 A CN201310205542 A CN 201310205542A CN 104218809 B CN104218809 B CN 104218809B
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- 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
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
The present invention provides the circuit devices of a kind of integrated power factor correcting and DC-dc conversion, including DC power supply, inverter, transformer, first diode, second diode and circuit of power factor correction, circuit of power factor correction includes third diode, 4th diode, first inductance and the second inductance, it is docked with the cathode of third diode one end of first inductance, it is docked with the anode of the 4th diode one end of second inductance, the docking of the cathode of the anode of third diode and the 4th diode, circuit of power factor correction has the input terminal for connecting an AC power source, wherein first diode, second diode, third diode and the 4th diode constitute bridge rectifier, the present invention is integrated with power factor correction circuit and DC-DC transfer circuit, reduce component number, improve the benefit of component With rate, a positive bus voltage and negative bus voltage can be exported.
Description
Technical field
The present invention relates to the circuit device in uninterrupted power supply system, in particular to a kind of integrated power factor correcting and straight
Stream-DC converting circuit device.
Background technique
Currently, being constantly progressive with electrical equipment research and development technology, the requirement to power supply quality is also higher and higher, does not power off
Power supply unit be powered electrical equipment due to what can be continued, can be arranged to electricity consumption provide one it is safe and stable and hold
The guarantee of continuous power supply, purposes is very extensive, has become the hot spot of people's research.
Fig. 1 be in the prior art commonly used by with circuit of power factor correction and DC-DC conversion circuit circuit
Figure, as shown in Figure 1, including one direct current-DC converting circuit 90 and circuit of power factor correction 80.When AC power source Vi output
When alternating voltage is normal, which obtains direct current output electricity at two capacitor both ends by circuit of power factor correction 80
Pressure, when the alternating voltage exception of AC power source Vi output, which is existed by DC-DC conversion circuit 90
Two capacitor both ends obtain a DC output voltage, do not power off power supply to realize.
But the DC-DC conversion circuit 90 of this uninterrupted power supply device and circuit of power factor correction 80 are simultaneously
It is connected with two capacitors, public member of two capacitors as DC-DC conversion circuit 90 and circuit of power factor correction 80
Device and as DC voltage output end, and other components are independent, so that the member in the uninterrupted power supply device
The quantity of device is more, and the utilization rate for causing component reduces.Therefore how to reduce straight with PFC and direct current-
The number of component in the circuit device that rheology is changed, the utilization rate for improving component is current urgent problem to be solved.
Summary of the invention
In view of the above technical problems, the present invention provides the circuit of a kind of integrated power factor correcting and DC-dc conversion
The circuit device of device, this integrated power factor correcting and DC-dc conversion can reduce the quantity of diode and inductance,
The utilization rate of diode and inductance is improved, while the diode of lower pressure resistance can be used, reduces equipment cost.
To achieve the goals above, the present invention provides the circuit of a kind of integrated power factor correcting and DC-dc conversion
Device, comprising:
DC power supply, for providing a DC voltage；
Inverter, including input terminal and output end, the input terminal of the inverter are electrically connected to the DC power supply；
Transformer, including primary side and secondary side, the primary side of the transformer are electrically connected to the output of the inverter
End；
First diode and the second diode, the cathode pair of the anode of the first diode and second diode
It connects；
Circuit of power factor correction, the circuit of power factor correction include third diode, the 4th diode, the first electricity
Sense and the second inductance, one end of first inductance are docked with the cathode of the third diode, one end of second inductance
It is docked with the anode of the 4th diode, the cathode docking of the anode and the 4th diode of the third diode, the function
Rate factor correcting circuit has the input terminal for connecting an AC power source；
Wherein the first diode, the second diode, third diode and the 4th diode constitute bridge rectifier,
The secondary side of the transformer is electrically connected to the input terminal of the bridge rectifier.
Circuit device of the invention passes through bridge rectifier and the public third diode of circuit of power factor correction, the 4th
Diode and the first inductance and the second inductance, circuit device of the invention reduces a rectifier bridge and an inductance, to subtract
The fever and loss of few circuit device, also reduce cost.
Preferably, the circuit device of integrated power factor correcting and DC-dc conversion further includes relay and alternating current
Source, the input terminal of the circuit of power factor correction are located at the cathode docking of the anode and the 4th diode of the third diode
Node at, the AC power source is electrically connected to the input terminal of the circuit of power factor correction by the relay, is used for
One alternating voltage is provided.
Preferably, circuit of power factor correction further include: the 5th diode, first capacitor and first switch device, and
6th diode, the second capacitor and second switch device.The one of the anode of 5th diode and the first switch device
End is connected to the other end of first inductance, and the cathode of the 5th diode is electrically connected with one end of the first capacitor,
The other end of the first capacitor is connected to the other end of the first switch device and ground connection；One end of second capacitor connects
Be connected to one end of the second switch device and ground connection, the cathode of the 6th diode and the second switch device it is another
End is connected to the other end of second inductance, and the anode of the 6th diode is connect with the other end of second capacitor.
Wherein first capacitor can be used for exporting the positive bus voltage of required one, the second capacitor negative bus electricity needed for can be used for exporting one
Pressure.
In a preferred embodiment, first switch device includes the first MOSFET, the anode of the 5th diode
Drain electrode with the first MOSFET is connected to the other end of first inductance, the cathode of the 5th diode and described the
One end of one capacitor is electrically connected, and the other end of the first capacitor is connected to the source electrode of the first MOSFET and ground connection；It is described
Second switch device includes the 2nd MOSFET, and the cathode of the 6th diode and the source electrode of the 2nd MOSFET are connected to described the
The anode of the other end of two inductance, the 6th diode is electrically connected with one end of second capacitor, second capacitor
The other end is connected to the drain electrode of the 2nd MOSFET and ground connection.
In another preferred embodiment, first switch device includes the first IGBT, the anode of the 5th diode
The other end of first inductance, the cathode of the 5th diode and first electricity are connected to the collector of the first IGBT
One end of appearance is electrically connected, and the other end of the first capacitor is connected to the emitter of the first IGBT and ground connection；Described second
Switching device includes the 2nd IGBT, and the cathode of the 6th diode and the emitter of the 2nd IGBT are connected to described second
The anode of the other end of inductance, the 6th diode is electrically connected with one end of second capacitor, second capacitor it is another
One end is connected to the collector of the 2nd IGBT and ground connection.
Preferably, inverter includes the push-pull circuit being made of two MOSFET.
Preferably, inverter includes the half-bridge circuit being made of two MOSFET.
Preferably, inverter includes the full-bridge circuit being made of four MOSFET.
Preferably, inverter includes the push-pull ortho-exciting circuit being made of two MOSFET.
The present invention also provides a kind of circuit devices including above-mentioned integrated power factor correcting and DC-dc conversion not
Power supply system is powered off, uninterrupted power supply system further includes control device, and control device for giving inverter, first switch device respectively
Part and second switch device provide pulse width modulating signal.By control device to the MOSFET in inverter, first switch
Device and second switch device carry out pulsewidth modulation.
The present invention also provides a kind of method of supplying power to, include the following steps: when the alternating voltage of the AC power source is normal,
The uninterrupted power supply system is defeated by the control device and the circuit of power factor correction conversion alternating voltage
A DC output voltage out；When the alternating voltage exception of the AC power source, the uninterrupted power supply system passes through the control
Device, DC power supply, inverter, transformer, first diode, the second diode and circuit of power factor correction processed are converted jointly
The DC voltage of the DC power supply and export a DC output voltage.
Preferably, when the alternating voltage exception of the AC power source, the inverter is made by the control device
In each MOSFET worked with pulse width modulation mode, make the first switch device with scheduled by the control device
The on and off of period in turn, and make on and off of the second switch device with the scheduled period in turn, work as institute
When stating the cut-off of first switch device, the second switch break-over of device, when the first switch break-over of device, described second is opened
Close device cut-off.The primary boosting for passing through inverter, improves work efficiency.
Preferably, when the alternating voltage exception of the AC power source, the inverter is made by the control device
In each MOSFET worked in a manner of fixed duty cycle, by the dc voltage boost of the DC current to the first alternating current
Pressure so that the first switch device is worked with the conducting in turn of scheduled period and pulse width modulation mode, and makes described the
Conducting and pulse width modulation mode work of two switching devices with the scheduled period in turn；And work as the second switch break-over of device
When, the first switch device is worked with pulse width modulation mode, so that first alternating voltage is boosted to positive bus again
Voltage, when the first switch break-over of device, the second switch is worked with pulse width modulation mode, by first alternating current
Pressure boosts to negative bus voltage again.
Preferably, when the alternating voltage exception of the AC power source, the inverter is made by the control device
In each MOSFET worked in a manner of fixed duty cycle, by the dc voltage boost of the DC current to the first alternating current
Pressure；And it provides identical pulsewidth modulation to the first switch device and second switch device by the control device to believe
Number, so that the first switch device and second switch device simultaneously turn on or end, thus again by first alternating voltage
Secondary boosting simultaneously obtains positive bus voltage and negative bus voltage simultaneously.
Detailed description of the invention
Embodiments of the present invention is further illustrated referring to the drawings, in which:
Fig. 1 is a kind of circuit diagram of uninterrupted power supply device of the prior art.
Fig. 2 is the integrated power factor correcting of first embodiment of the present invention and the circuit device of DC-dc conversion
Circuit diagram.
Fig. 3 is circuit diagram of the circuit device shown in Fig. 2 under AC power source operating mode.
Fig. 4 is the circuit diagram that circuit device shown in Fig. 3 exports positive bus voltage in the positive half period of AC power source.
Fig. 5 is the circuit diagram that circuit device shown in Fig. 3 exports negative bus voltage in the negative half-cycle of AC power source.
Fig. 6 is the circuit diagram that circuit device shown in Fig. 2 exports positive bus voltage under DC power supply operating mode.
Fig. 7 is the circuit diagram that circuit device shown in Fig. 2 exports negative bus voltage under DC power supply operating mode.
Fig. 8 is the circuit diagram of the circuit of power factor correction in second embodiment of the invention.
Fig. 9 is the integrated power factor correcting of third embodiment of the present invention and the circuit device of DC-dc conversion
In DC-AC conversion circuit diagram.
Figure 10 is the 4th integrated power factor correcting of embodiment and the circuit device of DC-dc conversion of the invention
In DC-AC conversion circuit diagram.
Figure 11 is the 5th integrated power factor correcting of embodiment and the circuit device of DC-dc conversion of the invention
In DC-AC conversion circuit diagram.
Figure 12 is the circuit diagram of the uninterrupted power supply system of a better embodiment of the invention.
Main device symbol description
10 push-pull circuits
20 half-bridge circuits
30 full-bridge circuits
40 push-pull ortho-exciting circuits
2 bridge rectifiers
3 circuit of power factor correction
The input terminal of 4 circuit of power factor correction
5 control devices
200 uninterrupted power supply systems
L1, L2 inductance
R relay
Vi AC power source
C1, C2, C3, C4, C5 capacitor
T1~T12 MOSFET
T13、T14 IGBT
B DC power supply
Tr transformer
D1~D8 diode
Specific embodiment
In order to make the purpose of the present invention, technical solution and advantage are more clearly understood, and are passed through below in conjunction with attached drawing specific real
Applying example, the present invention is described in more detail.
Fig. 2 is the integrated power factor correcting of first embodiment of the present invention and the circuit device of DC-dc conversion
Circuit diagram.As shown in Fig. 2, the circuit device of integrated power factor correcting and DC-dc conversion includes DC power supply B, changes
Device 10, transformer Tr, diode D1, diode D2 and circuit of power factor correction 3 are flowed, inverter 10 includes two and is respectively provided with
The source electrode and MOSFET T4 of the MOSFET of parasitic anti-parallel diodes, i.e. MOSFET T3 and MOSFET T4, MOSFET T3
Source electrode be connected and be grounded, the drain electrode of MOSFET T3 is connected to one end of the primary side of transformer Tr, the leakage of MOSFET T4
Pole is connected to the other end of the primary side of transformer Tr.The cathode of DC power supply B is grounded and anode is connected to the one of transformer Tr
On the centre tap of secondary side.So that MOSFET T3 and MOSFET T4 constitute push-pull circuit 10.Circuit of power factor correction 3
Including diode D3, inductance L1, diode D5, capacitor C1 and with the MOSFET T1 of parasitic anti-parallel diodes D7, two poles
The cathode of pipe D3 is connected with one end of inductance L1, and the drain electrode of the anode and MOSFET T1 of diode D5 is connected to the another of inductance L1
The cathode of one end, diode D5 is electrically connected with one end of capacitor C1, and the other end of capacitor C1 is connected to the source electrode of MOSFET T1 simultaneously
Ground connection.Circuit of power factor correction 3 further includes diode D4, inductance L2, diode D6, capacitor C2 and has parasitic reverse parallel connection
The anode of the MOSFET T2 of diode D8, diode D4 are connected with one end of inductance L2, the cathode and MOSFET of diode D6
The source electrode of T2 is connected to the other end of inductance L2, and the anode of diode D6 is electrically connected with one end of capacitor C2, and capacitor C2's is another
End is connected to drain electrode and the ground connection of MOSFET T2.The anode of diode D1 is connected with the cathode of diode D2, and diode D1
Cathode is connected with the cathode of diode D3, and the anode of diode D2 is connected with the anode of diode D4, so that diode D1, two poles
Pipe D2, diode D3 and diode D4 constitute a bridge rectifier 2, so that bridge rectifier 2 and power factor
Correcting circuit 3 shares diode D3 and diode D4.Two terminals of the secondary side of transformer Tr are connected to diode D1
Anode and diode D3 anode, i.e. the secondary side of transformer Tr is connected to the input terminal of bridge rectifier 2.AC power source
Vi is connected to the input terminal 4 of circuit of power factor correction 3 by relay R, i.e., in the anode of diode D3 and diode D4
At the node of cathode.
Fig. 3 is circuit diagram of the circuit device shown in Fig. 2 under AC power source operating mode.In AC power source operating mode
Under, MOSFET T3 and MOSFET T4 cut-off, AC power source Vi are connected to the defeated of circuit of power factor correction 3 by relay R
Enter end 4, a positive bus voltage and a negative bus voltage are exported by circuit of power factor correction 3.
AC power source operating mode shown in Fig. 3 will be illustrated respectively below.
Fig. 4 is the circuit diagram that circuit device shown in Fig. 3 exports positive bus voltage in the positive half period of AC power source.Such as
Shown in Fig. 4, including AC power source Vi, relay R, diode D3, inductance L1, diode D5, capacitor C1 and have parasitic reversed
The MOSFET T1 of parallel diode D7.In the positive half period of AC power source, relay R conducting, MOSFET T2 cut-off,
MOSFET T1 continuous on and off at pulse width modulating signal (PWM), to obtain institute at the both ends of capacitor C1
The positive bus voltage needed.
Fig. 5 is the circuit diagram that circuit device shown in Fig. 3 exports negative bus voltage in the negative half-cycle of AC power source.Such as
Shown in Fig. 5, including AC power source Vi, relay R, diode D4, inductance L2, diode D6, capacitor C2 and have parasitic reversed
The MOSFET T2 of parallel diode D8.In the negative half-cycle of AC power source, relay R conducting, MOSFET T1 cut-off,
MOSFET T2 continuous on and off under a pulse width modulating signal, thus required for being obtained at the both ends of capacitor C2
Negative bus voltage.In the conversion process of the on and off of MOSFET T2, since diode D4 and AC power source Vi are direct
Connection, therefore the vice-side winding both ends of transformer Tr are the disturbance of low frequency with ground relatively, will not be influenced by transformer Tr
To primary side interlock circuit and cause electromagnetic interference problem, to influence the EMC performance of whole device.
Therefore, we can obtain a positive bus voltage in the positive half period of AC power source, negative the half of AC power source
Period obtains a negative bus voltage.In an actual embodiment, the size of positive bus voltage and negative bus voltage can be distinguished
By boosting, modulation is obtained, and the size of positive bus voltage and negative bus voltage can be identical, naturally it is also possible to not identical.
Fig. 6 is the circuit diagram that circuit device shown in Fig. 2 exports positive bus voltage under DC power supply operating mode.Such as figure
Shown in 6, including inverter 10, DC power supply B, transformer Tr, bridge rectifier 2, inductance L1, inductance L2, diode D5,
MOSFET T1 and capacitor C1.
Fig. 7 is the circuit diagram that circuit device shown in Fig. 2 exports negative bus voltage under DC power supply operating mode.Such as figure
Shown in 7, including inverter 10, DC power supply B, transformer Tr, bridge rectifier 2, inductance L1, inductance L2, diode D6,
MOSFET T2 and capacitor C2.
Under DC power supply operating mode of the invention, inverter 10, DC power supply B and transformer Tr constitute one directly
Stream-AC transform circuit, the DC voltage conversion for providing DC power supply B is at an alternating voltage, thus as one
Stand-by AC power supply.In other examples, inverter 10, DC power supply B and transformer Tr can directly replace with one
The output end of spare AC power source, spare AC power source is connected with the input terminal of bridge rectifier 2, for providing another exchange
Voltage.Certainly, in another embodiment, it can also be that inverter 10 and DC power supply B, which are replaced with another, spare to be exchanged
The output end of power supply, the spare AC power source is connected with the primary side of transformer Tr, for providing another alternating voltage.
Fig. 8 is the circuit diagram of the circuit of power factor correction in second embodiment of the invention.Itself and the power in Fig. 2
The difference of factor correcting circuit 3 is that first switch device is IGBT T13, and second switch device is IGBT T14.Two poles
The anode of pipe D5 and the collector of IGBT T13 are connected to the other end of inductance L1, the cathode of diode D5 and one end of capacitor C1
Electrical connection, the other end of capacitor C1 are connected to the emitter of IGBT T13 and ground connection, the cathode of diode D6 and IGBT T14's
Emitter is connected to the other end of inductance L2, and the anode of diode D6 is electrically connected with one end of capacitor C2, the other end of capacitor C6
It is connected to the collector of IGBT T14 and ground connection.In other examples, IGBT T13 and IGBT T14 can also have respectively
There are anti-parallel diodes.
Fig. 9 is the integrated power factor correcting of third embodiment of the present invention and the circuit device of DC-dc conversion
In DC-AC conversion circuit diagram.Including DC power supply B, inverter 20 and transformer Tr.Wherein inverter includes by electricity
Hold the half-bridge circuit 20 that C3, capacitor C4, MOSFET T5 and MOSFET T6 are constituted.
Figure 10 is the 4th integrated power factor correcting of embodiment and the circuit device of DC-dc conversion of the invention
In DC-AC conversion circuit diagram.Including DC power supply B, inverter 30 and transformer Tr.Wherein inverter includes by four
The full-bridge circuit that a MOSFET T7 with anti-parallel diodes, MOSFET T8, MOSFET T9 and MOSFET T10 are constituted
30。
Figure 11 is the 5th integrated power factor correcting of embodiment and the circuit device of DC-dc conversion of the invention
In DC-AC conversion circuit diagram.Including DC power supply B, inverter 40 and transformer Tr.Wherein inverter includes by two
The push-pull ortho-exciting circuit 40 that a MOSFET T11 with anti-parallel diodes, MOSFET T12 and capacitor C5 are constituted.
It will be appreciated by those skilled in the art that in an embodiment of the present invention, other circuit knots can also be used
Structure realizes DC-AC conversion, to provide spare alternating voltage.In other examples, MOSFET T1,
MOSFET T2、MOSFET T3、MOSFET T4、MOSFET T5、MOSFET T6、MOSFET T7、MOSFET T8、MOSFET
T9, MOSFET T10, MOSFET T11 or MOSFET T12 can also not no reverse parallel connection diode.
Figure 12 is the circuit diagram of the uninterrupted power supply system of a better embodiment of the invention.Wherein control device 5 is excellent
Be selected as PWM controller, the pin (not shown) of control device 5 respectively with MOSFET T1, MOSFET T2, MOSFET T3
It is connected with the grid of MOSFET T4, MOSFET T3 and the MOSFET T4 and first switch device for being given in inverter respectively
Part MOSFET T1 and second switch device MOSFET T2 provides pulse width modulating signal, thus in capacitor C1 and capacitor C2
Voltage required for both ends export.
In a method of supplying power to of the present embodiment, when AC power source Vi is normal, MOSFET is made by control device 5
T3 and MOSFET T4 cut-off, and pulse is provided to first switch device MOSFET T1 and second switch device MOSFET T2
Bandwidth modulation signals, by control device 5 and circuit of power factor correction 3 convert alternating voltage export it is required positive/negative total
Line voltage.
In presently preferred method of supplying power to, when AC power source Vi exception, given by control device 5
MOSFET T3 and MOSFET T4 provide pulse-width signal, make MOSFET T1 with scheduled cycle wheel by control device 5
The on and off of stream, and make the on and off of MOSFET T2 in turn with the scheduled period, when MOSFET T1 cut-off,
MOSFET T2 conducting, when MOSFET T1 conducting, MOSFET T2 cut-off.I.e. within period first time, so that MOSFET
T2 conducting, MOSFET T1 on capacitor C1 by obtaining required positive bus voltage.In second time period, so that
MOSFET T1 conducting, MOSFET T2 on capacitor C2 by obtaining required negative bus voltage.Control in the third time cycle
Mode processed and in period first time it is identical, it is identical in the control mode and second time period in the 4th time cycle, and according to
Secondary circulation is gone down, thus the positive bus voltage of output and negative bus voltage in turn.
In another preferred method of supplying power to of the invention, when AC power source Vi exception, control device 5 gives MOSFET
The pulse width modulating signal of mono- fixed duty cycle of T3 and MOSFET T4, MOSFET T3 and MOSFET T4 are in pulse width tune
Under signal processed and transformer Tr by the dc voltage boost of DC power supply B and is converted to the first alternating voltage, and is output to bridge-type
The input terminal of rectification circuit 2.And the conducting and pulsewidth of MOSFET T1 in turn with the scheduled period are made by control device 5
Modulation system work, and make the conducting and pulse width modulation mode work of MOSFET T2 in turn with the scheduled period；And work as
When MOSFET T2 is connected, MOSFET T1 is worked with pulse width modulation mode, to the first alternating voltage be boosted to again just total
Line voltage, when MOSFET T1 conducting, MOSFET T2 is worked with pulse width modulation mode, and the first alternating voltage is boosted to again
Negative bus voltage.I.e. within period first time, so that MOSFET T2 is connected, a pulse-width signal is provided to MOSFET1,
Positive bus voltage is obtained to which the first alternating voltage boost again.In second time period, so that MOSFET T1 is connected,
A pulse-width signal is provided to MOSFET T2, so that the first alternating voltage is boosted again obtains negative bus voltage.When third
Between control mode in the period it is identical with period first time, control mode and second time period phase in the 4th time cycle
Together, it and circuits sequentially down, thus the positive bus voltage of output and negative bus voltage in turn.
In another of the invention preferred method of supplying power to, when AC power source Vi exception, control device 5 to MOSFET T3 and
The pulse width modulating signal of mono- fixed duty cycle of MOSFET T4, MOSFET T3 and MOSFET T4 are modulated in pulse width to be believed
Under number and transformer Tr by the dc voltage boost of DC power supply B and is converted to the first alternating voltage, and is output to bridge rectifier
The input terminal of circuit 2.An identical pulse width modulation is provided to MOSFET T1 and MOSFET T2 by control device 5 simultaneously
Signal simultaneously turns on or ends, so that the first alternating voltage be boosted again and while obtaining positive bus voltage and negative bus
Voltage.
Although the present invention has been described by means of preferred embodiments, the present invention is not limited to described here
Embodiment, without departing from the present invention further include made various changes and variation.
Claims (12)
1. a kind of circuit device of integrated power factor correcting and DC-dc conversion, comprising:
DC power supply (B), for providing a DC voltage；
Inverter (10；20；30；40), including input terminal and output end, the inverter (10；20；30；40) input terminal electricity
It is connected to the DC power supply (B)；
The primary side of transformer (Tr), including primary side and secondary side, the transformer (Tr) is electrically connected to the inverter
(10；20；30；40) output end；
First diode (D1) and the second diode (D2), the anode and second diode of the first diode (D1)
(D2) cathode docking；
Circuit of power factor correction (3), the circuit of power factor correction (3) include third diode (D3), the 4th diode
(D4), the first inductance (L1) and the second inductance (L2), one end of first inductance (L1) and the third diode (D3)
Cathode docking, one end of second inductance (L2) are docked with the anode of the 4th diode (D4), the third diode
(D3) the cathode docking of anode and the 4th diode (D4), the circuit of power factor correction (3) has hands over for connecting one
The input terminal (4) in galvanic electricity source；
Wherein the first diode (D1), the second diode (D2), third diode (D3) and the 4th diode (D4) are constituted
The secondary side of bridge rectifier (2), the transformer (Tr) is electrically connected to the input terminal of the bridge rectifier (2).
2. the circuit device of integrated power factor correcting and DC-dc conversion according to claim 1, feature exist
In further including relay (R) and AC power source (Vi), the input terminal (4) of the circuit of power factor correction (3) is located at described the
At the node of the cathode of the anode of three diodes (D3) and the 4th diode (D4) docking, the AC power source (Vi) passes through described
Relay (R) is electrically connected to the input terminal (4) of the circuit of power factor correction (3), for providing an alternating voltage.
3. the circuit device of integrated power factor correcting and DC-dc conversion according to claim 1, feature exist
In the circuit of power factor correction further include:
5th diode (D5), first capacitor (C1) and first switch device (T1；T13), the sun of the 5th diode (D5)
Pole and the first switch device (T1；T13 one end) is connected to the other end of first inductance (L1), the five or two pole
The cathode of pipe (D5) is electrically connected with one end of the first capacitor (C1), and the other end of the first capacitor (C1) is connected to described
First switch device (T1；T13 the other end and ground connection)；And
6th diode (D6), the second capacitor (C2) and second switch device (T2；T14), one end of second capacitor (C2)
It is connected to the second switch device (T2；T14 one end and ground connection), the cathode and described second of the 6th diode (D6)
Switching device (T2；T14 the other end) is connected to the other end of second inductance (L2), the sun of the 6th diode (D6)
Pole is connect with the other end of second capacitor (C2).
4. the circuit device of integrated power factor correcting and DC-dc conversion according to any one of claims 1 to 3,
It is characterized in that, the inverter includes the push-pull circuit (10) being made of two MOSFET (T3, T4).
5. the circuit device of integrated power factor correcting and DC-dc conversion according to any one of claims 1 to 3,
It is characterized in that, the inverter includes the half-bridge circuit (20) being made of two MOSFET (T5, T6).
6. the circuit device of integrated power factor correcting and DC-dc conversion according to any one of claims 1 to 3,
It is characterized in that, the inverter includes the full-bridge circuit (30) being made of four MOSFET (T7, T8, T9, T10).
7. the circuit device of integrated power factor correcting and DC-dc conversion according to any one of claims 1 to 3,
It is characterized in that, the inverter includes the push-pull ortho-exciting circuit (40) being made of two MOSFET (T11, T12).
8. a kind of circuit device including integrated power factor correcting as claimed in claim 3 and DC-dc conversion is continuous
Electric power supply system, the uninterrupted power supply system (200) further include control device (5), and the control device (5) for giving respectively
The inverter (10；20；30；40), first switch device (T1；) and second switch device (T2 T13；T14 it is wide) to provide pulse
Spend modulated signal.
9. a kind of method of supplying power to about uninterrupted power supply system according to any one of claims 8, includes the following steps:
(a) when the alternating voltage of the AC power source (Vi) is normal, the uninterrupted power supply system (200) passes through the control
Device (5) and the circuit of power factor correction (3) convert the alternating voltage and export a DC output voltage；
(b) when the alternating voltage exception of the AC power source (Vi), the uninterrupted power supply system (200) passes through the control
Device (5), DC power supply (B), inverter (10；20；30；40), transformer (Tr), first diode (D1), the second diode
(D2) and circuit of power factor correction (3) converts the DC voltage of the DC power supply (B) jointly and exports direct current output electricity
Pressure.
10. method of supplying power to according to claim 9, which is characterized in that the step (b) further includes following steps:
Make the inverter (10 by the control device (5)；20；30；40) each MOSFET (T3, T4 in；T5, T6；
T7, T8, T9, T10；T11, T12) it is worked with pulse width modulation mode, the first switch device is made by the control device (5)
Part (T1；T13) the on and off with the scheduled period in turn, and make the second switch device (T2；T14) with scheduled
The on and off of period in turn, as the first switch device (T1；When T13) ending, the second switch device (T2；
T14 it) is connected, as the first switch device (T1；When T13) being connected, the second switch device (T2；T14) end.
11. method of supplying power to according to claim 9, which is characterized in that the step (b) further includes following steps:
Make the inverter (10 by the control device (5)；20；30；40) each MOSFET (T3, T4 in；T5, T6；
T7, T8, T9, T10；T11, T12) it is worked in a manner of fixed duty cycle, the dc voltage boost of the DC power supply (B) is arrived
First alternating voltage, so that the first switch device (T1；T13) with the conducting in turn of scheduled period and pulse width modulation mode
Work, and make the second switch device (T2；T14) the conducting and pulse width modulation mode work with the scheduled period in turn；
And
As the second switch device (T2；When T14) being connected, the first switch device (T1；T13) with pulse width modulation mode work
Make, so that first alternating voltage is boosted to positive bus voltage again, as the first switch device (T1；T13 it) is connected
When, the second switch (T2；T14 it) is worked with pulse width modulation mode, first alternating voltage is boosted into negative bus again
Voltage.
12. method of supplying power to according to claim 9, which is characterized in that the step (b) further includes following steps:
Make the inverter (10 by the control device (5)；20；30；40) each MOSFET (T3, T4 in；T5, T6；
T7, T8, T9, T10；T11, T12) it is worked in a manner of fixed duty cycle, the dc voltage boost of the DC power supply (B) is arrived
First alternating voltage；And
First switch device (the T1 is given by the control device (5)；) and second switch device (T2 T13；T14) phase is provided
Same pulse-width signal, so that the first switch device (T1；) and second switch device (T2 T13；T14) simultaneously turn on or
Cut-off, so that first alternating voltage be boosted again and while obtaining positive bus voltage and negative bus voltage.
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| CN110601541A (en) * | 2019-09-10 | 2019-12-20 | 深圳南云微电子有限公司 | Control method and controller of full-bridge converter |
| CN112737307B (en) * | 2020-12-31 | 2022-08-30 | 联正电子(深圳)有限公司 | Power factor correction circuit |
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| CN1363977A (en) * | 2002-02-01 | 2002-08-14 | 深圳安圣电气有限公司 | Power factor corrector for UPS |
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| CN102801299A (en) * | 2012-07-18 | 2012-11-28 | 华为技术有限公司 | Control method for power factor correction controller and uninterrupted power supply |
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| CN1336709A (en) * | 2001-07-26 | 2002-02-20 | 深圳市安圣电气有限公司 | Front stage voltage doubler circuit for UPS and its control method |
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