CN105871205A - Integrated multifunctional power source switching system - Google Patents
Integrated multifunctional power source switching system Download PDFInfo
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- CN105871205A CN105871205A CN201610301033.9A CN201610301033A CN105871205A CN 105871205 A CN105871205 A CN 105871205A CN 201610301033 A CN201610301033 A CN 201610301033A CN 105871205 A CN105871205 A CN 105871205A
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- Prior art keywords
- power switching
- terminal
- power
- interface
- switching
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators
- H02M3/1563—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators without using an external clock
-
- 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
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
- H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
- H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/79—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with 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
- H02M7/797—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with 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
Abstract
The invention discloses an integrated multifunctional power source switching system. An alternating-current interface of the integrated multifunctional power source switching system is connected with an alternating-current end switch through an EMI filter, passes through the alternating-current end switch, a first direct-current end inductor and a second direct-current end inductor and is connected with bridge arm middle points formed by a first power switch device, a second power switch device, a third power switch device and a fourth power switch device respectively; the positive electrode and the negative electrode of a first direct-current end interface are connected with the positive electrode and the negative electrode of a first direct-current end filter capacitor respectively, the positive electrode of the first direct-current end filter capacitor passes through a direct-current end switch and then is divided into two paths, and the two paths pass through the first direct-current end inductor and the second direct-current end inductor and then are connected to bridge arm middle points formed by the first power switch device, the second power switch device, the third power switch device and the fourth power switch device respectively. The switching system is used for mutual switching between alternating currents and direct currents of an electric automobile power source system, and two-way direct current-direct current switching, single-phase alternating current-direct current switching and direct current-single-phase alternating current switching between power sources are achieved.
Description
Technical field
The present invention relates to a kind of power conversion system, particularly relate to a kind of integrated multifunction Power convert system
System, specifically a kind of electric car power supply DC/DC, AC/DC, DC/AC converting system.
Technical background
Electric automobile, as the vehicles of a kind of low-carbon environment-friendly, represents the direction of future automobile development, closely
Quickly grow over Nian.In order to improve the performance of electric automobile power supply system, generally use lithium battery or fuel electricity
Pond as accessory power supply, constitutes composite power source structure as main power source, collocation super capacitor group or accumulator,
To meet the demand of power-supply system power and energy.Main power source and accessory power supply are generally of different voltage etc.
Level, needs to use a two-way DC/DC transducer to carry out bidirectional DC power supply conversion, it is achieved voltage matches；
Meanwhile, in order to charge to the battery of main power source, need to use a charger possessing AC/DC function, will
Electrical network alternating current is converted into unidirectional current；It addition, when carrying out outdoor activities, in order to meet AC electric equipment
Demand, need again a DC/AC inverter, by the converting direct-current power into alternating-current power of battery.At present, for
Realize this three kinds of functions, need to be equipped with two-way DC/DC changer, AC/DC charger, one
Individual DC/AC inverter, occupies expensive real estate in car, adds electric automobile weight and cost.
Summary of the invention
Present invention is primarily targeted at, it is provided that a kind of integrated multifunction power conversion system, it is possible to realize
The two-way DC/DC conversion of electric car power supply, AC/DC conversion, DC/AC conversion.
Integrated multifunction power conversion system involved in the present invention, two-way DC/DC changer, AC/DC
Charger, DC/AC inverter share controlled power switching device, are carried out device for power switching by ECU
Full-digital control, can make system work in two-way DC/DC conversion, AC/DC conversion and DC/AC conversion three
The pattern of kind.When working in two-way DC/DC pattern, constitute biphase cross structure, by suitable control strategy,
Electric current and voltage ripple can be reduced；When working in AC/DC rectification mode, control strategy can be passed through, it is achieved
PFC, improves power factor；It addition, by the control of ECU, it is achieved single-phase inversion.This
Bright involved integrated multifunction power conversion system, owing to having shared device for power switching, decreases power
The quantity of switching device and matched radiator quantity, have less volume, lighter weight, more
Low cost.
In order to realize foregoing invention purpose, present invention employs following technical scheme:
A kind of integrated multifunction power conversion system, opens including exchange interface, electromagnetic interface filter, exchange end
Pass, the first DC terminal filter capacitor, the first DC terminal interface, DC terminal switch, the second DC terminal interface,
Set of cells, the second DC terminal filter capacitor, ECU, the first device for power switching, the second device for power switching,
3rd device for power switching and the 4th device for power switching；
Described exchange interface connects exchange end switch through electromagnetic interface filter, by exchange end switch and first
It is connected respectively to the first device for power switching, the second power switch after DC terminal inductance and the second DC terminal inductance
The brachium pontis midpoint that device, the 3rd device for power switching and the 4th set of power switches become；Or described friendship
Stream interface connects exchange end inductance respectively through electromagnetic interface filter and exchanges end inductance, is then opened by exchange end
Be connected respectively to behind pass the first device for power switching, the second device for power switching, the 3rd device for power switching and
The brachium pontis midpoint that 4th set of power switches becomes；
The both positive and negative polarity of described first DC terminal interface both positive and negative polarity with the first DC terminal filter capacitor respectively is connected,
The positive pole of the first DC terminal filter capacitor is divided into two-way after DC terminal switchs, and two-way is respectively through the first direct current
End inductance and the second DC terminal inductance connection to the first device for power switching, the second device for power switching, the 3rd
The brachium pontis midpoint that device for power switching and the 4th set of power switches become；
Described first device for power switching, the second device for power switching, the 3rd device for power switching and the 4th merit
Two brachium pontis of rate switching device composition are high-end, low side is respectively connected with, high-end, the low side difference of two brachium pontis
The both positive and negative polarity of the second DC terminal interface is connected with the both positive and negative polarity of the second DC terminal filter capacitor after being connected；Second is straight
The both positive and negative polarity of stream end interface connects the both positive and negative polarity of the set of cells of DC source respectively；
First current sensor and the second current sensor are connected respectively to the first device for power switching, the second merit
The brachium pontis midpoint that rate switching device, the 3rd device for power switching and the 4th set of power switches become, the 3rd electricity
Flow sensor is connected between the second DC terminal filter capacitor positive pole and the positive pole of the second DC terminal interface；First
The positive-negative input end of voltage sensor is connected to the alternating current path two ends after electromagnetic interface filter, the second voltage sensor
The positive-negative input end of device is connected to the first DC terminal interface two ends, and the positive-negative input end of tertiary voltage sensor is even
It is connected on the second DC terminal interface two ends；First voltage sensor, the second voltage sensor, tertiary voltage sense
Device, the first current sensor, the second current sensor and the 3rd current sensor are connected with ECU the most respectively.
For realizing the object of the invention further, it is preferable that described first device for power switching, the second power are opened
Close device, the 3rd device for power switching and the 4th device for power switching are to be internally integrated a switching tube and one
The mos field effect transistor of anti-parallel diodes, SPM, insulated gate are double
Bipolar transistor, anti-parallel diodes negative electrode is connected with switching tube colelctor electrode, backward diode anode and opening
Close pipe emitter stage to be connected.
Preferably, the emitter stage of described first device for power switching and the colelctor electrode phase of the 4th device for power switching
Even, forming one group of brachium pontis, the collector terminal of the first device for power switching is that brachium pontis is high-end, the first power switch
The emitter stage of device and the colelctor electrode junction of the 4th device for power switching are brachium pontis midpoint, the 4th power switch
The transmitting of device extremely brachium pontis low side, connects the first DC terminal interface and the negative pole of the second DC terminal interface；The
The emitter stage of two device for power switching and the colelctor electrode of the 3rd device for power switching are connected, and form another group bridge
Arm, the collector terminal of the second device for power switching is that brachium pontis is high-end, the emitter stage of the second device for power switching and
The colelctor electrode junction of the 3rd device for power switching is brachium pontis midpoint, and the transmitting of the 3rd device for power switching is extremely
Brachium pontis low side, connects the first DC terminal interface and the negative pole of the second DC terminal interface.
Preferably, described exchange interface sequentially passes through transformator and exchanges end inductance with electromagnetic interface filter connection.
Preferably, the both positive and negative polarity of described first DC terminal interface connects the both positive and negative polarity of super capacitor group respectively.
Preferably, the both positive and negative polarity of described set of cells connects the both positive and negative polarity of electric machine controller, and electric machine controller connects
Three phase electric machine.
Device for power switching brachium pontis of the present invention is to be become by 4 set of power switches, each two tandem compound,
Constitute two brachium pontis；Described power switch device mos field effect transistor (MOSFET),
Controllable semiconductor device such as insulated gate bipolar transistor (IGBT), SPM (IPM) and anti-
Constitute to parallel diode.
Alternating current path of the present invention passes through electromagnetic interface filter, transformator, inductance, can AC voltages transmission be arrived
Late-class circuit, alternating voltage can be the 220V single-phase alternating current of China's standard, it is also possible to be other grades
Alternating current.Described exchange interface can input electrical network list when AC/DC pattern as exchange input interface
Cross streams electricity, when DC/AC translative mode as exchange output interface, it is provided that single-phase alternating current；Described
Transformator carries out alternating voltage conversion in exchange interface end, when exchange interface end voltage meets rear class electric pressure
During requirement, it is also possible to do not use；Described inductance can share with alternating current path, DC channel, it is also possible to hands over
Circulation flow path, DC channel are used separately.
The present invention the first DC terminal power supply may switch to the second DC terminal, and the second DC terminal power supply can also be anti-
To being transformed into the first DC terminal, it is achieved two-way DC/DC function；Alternating current can be transformed into second by exchange end
DC terminal, it is provided that DC source；Second DC terminal power supply can be with inversion to exchange end, it is provided that single-phase alternating current.
Main circuit of the present invention is made up of two paths of AC and DC.The single-phase alternating current of alternating current path input into
After the conversion of row voltage and EMI filter, through a shunt capacitance, exchange L level and N level series inductance respectively,
It is connected on two brachium pontis that set of power switches becomes；DC channel, after a shunt capacitance, is divided into
Two branch roads, are connected to two brachium pontis respectively after series inductance.Two brachium pontis high-end through an electricity in parallel
High-end dc bus it is connected to after appearance.Current sensor, voltage sensor send after sampling voltage and current signal
Enter ECU, ECU and after calculating, produce the break-make of pwm signal control device for power switching, with satisfied difference
The demand of translative mode.
Present system has three kinds of mode of operations:
(1) two-way DC/DC pattern.Under this pattern, alternating current path disconnects, and the first DC channel is connected,
System may operate in decompression mode, it is also possible to works in boost mode.Under boost mode, the first DC terminal
By the biphase cross structure being made up of the first DC terminal inductance, device for power switching, the second DC terminal electric capacity
Boost circuit, exports voltage pump rise to high direct voltage, can control output voltage and size of current
System；Under decompression mode, the second DC terminal is by by device for power switching, the first DC terminal inductance, first straight
Two staggered Buck circuit of stream end electric capacity composition, it is achieved blood pressure lowering, it is possible to big to output voltage, electric current
Little it is controlled.In order to reduce conduction loss, four device for power switching are operable with synchronous rectification pattern.
(2) AC/DC rectification mode.Under this pattern, the first DC channel disconnects, and alternating current path is connected,
Energy is flowed to the second DC terminal by electrical network.Two down tubes of two-way brachium pontis work in PWM mode, two
The anti-parallel diodes work of upper pipe, system is constituted without bridge APFC translation circuit, by pwm signal
Control, the power factor of input can be improved.
(3) DC/AC inverter mode.Under this pattern, the first DC channel disconnects, and alternating current path is connected,
Energy is flowed to exchange end by the second DC terminal.4 device for power switching all work in PWM mode, pass through ECU
Carry out vector controlled, complete the direct current conversion to exchange.
Relative to prior art, present invention have the advantage that
(1) have employed two-phase type staggered bi-directional DC/DC framework, 4 set of power switches have become H bridge,
Integrated bi-directional DC/DC, single-phase AC/DC and single-phase DC/AC pattern, it is possible to realize two-way DC converter,
Battery bag charger, inverter several functions.
(2) two-way DC/DC pattern, single-phase AC/DC pattern and single-phase DC/AC mode common power switch
Device, sensor, driver, controller, reduce system bulk, has saved system cost.
(3), under single-phase AC/DC pattern, 4 full controlled power switching device composition H bridges are used, it is possible to
Realize Active PFC.
Accompanying drawing explanation
Fig. 1 is the embodiment of the present invention 1 circuit theory diagrams.
Fig. 2 is that the embodiment of the present invention 1 exchange inputs as timing equivalent circuit diagram.
Fig. 3 is that the embodiment of the present invention 1 exchange inputs as equivalent circuit diagram time negative.
Fig. 4 (a) is that embodiment 1 works in two-way DC/DC Schema control sequential chart.
Fig. 4 (b) is that embodiment 1 works in AC/DC Schema control sequential chart.
Fig. 4 (c) is that embodiment 1 works in DC/AC Schema control sequential chart.
Fig. 5 is the embodiment of the present invention 2 circuit theory diagrams.
Fig. 6 is the embodiment of the present invention 3 circuit theory diagrams.
Detailed description of the invention
For being more fully understood that the present invention, the present invention is further illustrated with embodiment below in conjunction with the accompanying drawings,
But embodiments of the present invention are not limited to this.
Embodiment 1
Integrated multifunction power conversion system, is applied to set of cells and the composite power source system of super capacitor composition
System, integrated multifunction power conversion system carries out DC source conversion between super capacitor and set of cells,
It is set of cells charging that alternating current input power supplying is converted into DC source, becomes exchange defeated set of cells DC inverter
Go out.
As it is shown in figure 1, integrated multifunction power conversion system includes exchanging interface 1, transformator 2, EMI
Wave filter 3, first exchanges end inductance 51, second and exchanges end inductance 52, exchange end switch the 6, first direct current
End filter capacitor the 16, first DC terminal interface 17, super capacitor group 18, DC terminal switch 15, first are straight
Stream end inductance the 53, second DC terminal inductance the 54, second DC terminal interface 10, set of cells 11, motor control
Device 12, three phase electric machine the 13, second DC terminal filter capacitor 14, ECU7, the first voltage sensor 41,
Second voltage sensor 42, tertiary voltage sensor the 43, first current sensor the 81, second current sense
Device 82, the 3rd current sensor the 83, first device for power switching the 91, second device for power switching 92,
Three device for power switching 93 and the 4th device for power switching 94.
First device for power switching the 91, second device for power switching 92, the 3rd device for power switching 93 and
Four device for power switching 94 can be to be internally integrated a switching tube and the metal of an anti-parallel diodes
Oxide semiconductor field effect transistor (MOSFET), SPM (IPM), insulated gate bipolar
Transistor (IGBT), anti-parallel diodes negative electrode is connected with switching tube colelctor electrode, backward diode anode
It is connected with switching tube emitter stage.This embodiment is with first device for power switching the 91, second power switch device
Part the 92, the 3rd device for power switching 93 and the 4th device for power switching 94 are all insulated gate bipolar crystal
Pipe (IGBT) illustrates, and this IGBT internal structure is equivalent to a switching tube and a diode reverse
Parallel connection, diode cathode is connected with switching tube colelctor electrode, and diode anode is connected with switching tube emitter stage.The
The emitter stage of one device for power switching 91 and the colelctor electrode of the 4th device for power switching 94 are connected, and form one group
Brachium pontis, the collector terminal of the first device for power switching 91 is that brachium pontis is high-end, the first device for power switching 91
Emitter stage and the colelctor electrode junction of the 4th device for power switching 94 be brachium pontis midpoint, the 4th power switch
The transmitting of device 94 extremely brachium pontis low side, connects the first DC terminal interface 17 and the second DC terminal interface 10
Negative pole；The emitter stage of the second device for power switching 92 and the colelctor electrode of the 3rd device for power switching 93 are connected,
Forming another group brachium pontis, the collector terminal of the second device for power switching 92 is that brachium pontis is high-end, and the second power is opened
Close the emitter stage of device 92 and the colelctor electrode junction of the 3rd device for power switching 93 is brachium pontis midpoint, the 3rd
The transmitting of device for power switching 93 extremely brachium pontis low side, connects the first DC terminal interface 17 and the second DC terminal
The negative pole of interface 10.
Exchange interface 1 sequentially passes through transformator 2 and connects respectively with electromagnetic interface filter 3 and exchange end inductance 51 He
Exchange end inductance 52, then by exchange end switch 6 after be connected respectively to the first device for power switching 91,
Second device for power switching the 92, the 3rd device for power switching 93 and the 4th device for power switching 94 form
Brachium pontis midpoint.
The both positive and negative polarity of the first DC terminal interface 17 connects the both positive and negative polarity of super capacitor group 18, the first DC terminal respectively
The both positive and negative polarity of interface 17 both positive and negative polarity with the first DC terminal filter capacitor 16 respectively is connected, the first DC terminal filter
The positive pole of ripple electric capacity 16 is divided into two-way after DC terminal switch 15, and two-way is respectively through the first DC terminal inductance
53 and second DC terminal inductance 54 be connected to first device for power switching the 91, second device for power switching 92,
3rd device for power switching 93 and the brachium pontis midpoint of the 4th device for power switching 94 composition.
First device for power switching the 91, second device for power switching 92, the 3rd device for power switching 93 and
Four device for power switching 94 compositions two brachium pontis are high-end, low side is respectively connected with, two brachium pontis high-end,
The both positive and negative polarity of low side respectively with the second DC terminal filter capacitor 14 connects the second DC terminal interface 10 after being connected
Both positive and negative polarity；The both positive and negative polarity of the second DC terminal interface 10 connects the both positive and negative polarity of the set of cells 11 of DC source respectively,
The both positive and negative polarity of set of cells 11 connects the both positive and negative polarity of electric machine controller 12, and electric machine controller 12 connects three-phase electricity
Machine 13.
First current sensor 81 and the second current sensor 82 are connected respectively to the first device for power switching
91, the second device for power switching the 92, the 3rd device for power switching 93 and the 4th device for power switching 94 groups
The brachium pontis midpoint become, gathers brachium pontis midpoint respectively and flows to the first DC terminal inductance 53 and the second DC terminal inductance
The electric current of 54；3rd current sensor 83 is connected to the second DC terminal filter capacitor 14 positive pole and second straight
Between the positive pole of stream end interface 10, gather the second DC terminal output electric current.First voltage sensor 41 is just
Negative input end is connected to the alternating current path two ends after electromagnetic interface filter 3, the second voltage sensor 42 positive and negative
Input is connected to the first DC terminal interface 17 two ends, and the positive-negative input end of tertiary voltage sensor 43 connects
At the second DC terminal interface 10 two ends；First voltage sensor the 41, second voltage sensor 42 and the 3rd
Voltage sensor 43 gathers respectively through electromagnetic interface filter 3 filtered alternating current path voltage, the first DC terminal
The voltage at interface 17 two ends and the voltage at the second DC terminal interface 10 two ends.First voltage sensor 41,
Second voltage sensor 42, tertiary voltage sensor the 43, first current sensor the 81, second current sense
Device 82 and the 3rd current sensor 83 are connected with ECU7 the most respectively；Respectively by the voltage collected, electric current
Signal send into ECU7 process, and generate four road pwm signals send into the first device for power switching 91,
Second device for power switching the 92, the 3rd device for power switching 93 and the gate pole of the 4th device for power switching 94.
When system works in two-way DC/DC pattern, controlling shown in sequential such as Fig. 4 (a), exchange end is opened
Close 6 disconnections, DC terminal switch 15 Guan Bi, under this pattern, exchange interface 1, transformator 2, EMI filtering
Device 3, first exchanges end inductance the 51, second exchange end inductance 52 and is not involved in work.In order to make the upper of brachium pontis
Lower switching device will not simultaneously turn on because of switching speed problem, the first device for power switching 91 He
Between 4th device for power switching 94, the second device for power switching 92 and the 3rd device for power switching 93 it
Between Dead Time T is setdead, make to be spaced between the IGBT up and down of brachium pontis TdeadConducting.Add Dead Time
TdeadAfter, the brachium pontis formed for the first device for power switching 91 and the 4th device for power switching 94, when the
After one device for power switching 91 is closed, elapsed time Tdead, the 4th device for power switching 94 turns on；When
After four device for power switching 94 are closed, elapsed time Tdead, the first device for power switching 91 turns on.For
Second device for power switching 92 and the brachium pontis of the 3rd device for power switching 93 composition, when the second power switch device
After part 92 is closed, elapsed time Tdead, the 3rd device for power switching 93 turns on；When the 3rd power switch device
After part 93 is closed, elapsed time Tdead, the second device for power switching 92 turns on.When electric automobile needs urgency
During acceleration, the 3rd device for power switching 93 and the 4th device for power switching 94 are operated in PWM mode, the
One device for power switching the 91, second device for power switching 92 provides current path by anti-parallel diodes
Or work in synchronous rectification pattern, in order to reduce ripple, make the 3rd device for power switching 93 and the 4th power
The control signal phase of switching device 94 180 degree, now, system works in DC boosting pattern,
Super capacitor group 18 is after boosting, and set of cells 11 provides direct current to export jointly.Work as electric vehicle brake
When recovering energy, first device for power switching the 91, second device for power switching 92 is operated in PWM mode,
3rd device for power switching 93 and the 4th device for power switching 94 provide electric current to lead to by anti-parallel diodes
Road or work in synchronous rectification pattern, in order to reduce ripple, makes first device for power switching the 91, second merit
The control signal phase of rate switching device 92 180 degree, now, system works in DC decompression pattern,
It is filled with super capacitor group 18 after second DC terminal voltage blood pressure lowering.
AC network has certain fluctuation range, when input ac voltage virtual value is VacL～VacH(VacLFor handing over
Stream voltage effective value minimum, VacHFor alternating voltage virtual value peak), then peak ranges isWhen the second DC terminal interface 10 minimum voltage is less thanTime, influence whether AC/DC
Pattern normally works, when the second DC terminal interface 10 minimum voltage is less thanTime, the exchange that inversion obtains
Electricity lowest effective value will be less than VacL, influence whether that DC/AC pattern normally works, therefore, Design of Transformer
2 pairs exchange terminal voltage convert with and late-class circuit coupling.
When system works in AC/DC pattern, exchange end switch 6 closes, DC terminal switch 15 disconnection,
Exchange interface 1 connects electrical network single-phase alternating current, charges for set of cells 11 after conversion.When exchange interface
When the alternating voltage of 1 is more than 0, control shown in sequential such as Fig. 4 (b), super capacitor group 18, DC terminal
Switch 15, first DC terminal inductance the 53, second DC terminal inductance 54, tertiary voltage sensor 43 not work
Making, the 4th device for power switching 94 works in PWM mode, the first device for power switching the 91, the 3rd merit
Rate switching device 93 gate-drive is that low level remains turned-off, and is provided by integrated anti-parallel diodes
Current path；Second device for power switching 92 is closed, owing to input voltage is more than 0, and the second power switch
The integrated anti-parallel diodes of device 92 does not turns on, and equivalent circuit is as shown in Figure 2.Now, may be used
It is transformed to high-voltage dc signal, by the 4th device for power switching 94 with the input voltage by positive half cycle
Pwm signal applies suitable control strategy, it is possible to achieve PFC.
When the alternating voltage exchanging interface 1 is less than 0, control shown in sequential such as Fig. 4 (b), super electricity
Appearance group 18, DC terminal switch 15, DC terminal inductance 53, DC terminal inductance 54, tertiary voltage sensor
43 do not work, and the 3rd device for power switching 93 works in PWM mode, the second device for power switching 92,
4th device for power switching 94 gate-drive is that low level remains turned-off, by integrated reverse parallel connection two pole
Pipe provides current path, and the first device for power switching 91 gate-drive is low level, owing to input voltage is little
In 0, the integrated anti-parallel diodes of the first device for power switching 91 does not turns on, and equivalent circuit is such as
Shown in Fig. 3.At this point it is possible to the input voltage of negative half period is transformed to high-voltage dc signal, by the 3rd
The pwm signal of device for power switching 93 applies suitable control strategy, it is achieved PFC.
When system works in DC/AC pattern, exchange end switch 6 closes, DC terminal switch 15 disconnection,
Single-phase alternating current is provided at exchange interface 1 after set of cells 11 is transformed, under this pattern, exchange interface 1,
Transformator 2, electromagnetic interface filter 3, exchange end inductance 51, exchange end inductance 52 are not involved in work, control
Shown in sequential such as Fig. 4 (c).In order to make the switching device up and down of brachium pontis will not send out because of switching speed problem
Life simultaneously turns on, and between the first device for power switching 91 and the 4th device for power switching 94, the second power is opened
Close and between device 92 and the 3rd device for power switching 93, Dead Time T is setdead, make the IGBT up and down of brachium pontis
Between be spaced TdeadConducting.Add Dead Time TdeadAfter, for the first device for power switching 91 and the 4th
The brachium pontis of device for power switching 94 composition, after the first device for power switching 91 is closed, elapsed time Tdead,
4th device for power switching 94 turns on；After the 4th device for power switching 94 is closed, elapsed time Tdead,
First device for power switching 91 turns on.For the second device for power switching 92 and the 3rd device for power switching
The brachium pontis of 93 compositions, after the second device for power switching 92 is closed, elapsed time Tdead, the 3rd power is opened
Close device 93 to turn on；After the 3rd device for power switching 93 is closed, elapsed time Tdead, the second power is opened
Close device 92 to turn on.First device for power switching the 91, second device for power switching the 92, the 3rd power switch
Device the 93, the 4th device for power switching 94 works in PWM mode, by controlling pwm signal
System, system constitutes single-phase inversion circuit, is exchange by the DC source inversion of the second DC terminal set of cells 11
Power supply exports.
By switching and the control of IGBT to exchange end switch, DC terminal, it is achieved two-way DC/DC pattern,
Single-phase DC/AC pattern, single-phase AC/DC pattern, each mode common IGBT, voltage sensor, electric current
Sensor, controller, each independent compared to two-way DC/DC, AC/DC charger, DC/AC inverter
Design, it is possible to cost-effective and space.
The present invention, electric current, voltage sensor by the electric current detected, voltage signal send into ECU calculate,
ECU produces 4 road pwm signals and is controlled four device for power switching, according to control signal not respectively
With, realize two-way DC/DC function, AC/DC function, DC/AC function respectively.
When working in two-way DC/DC pattern, two brachium pontis and inductance constitute biphase cross structure, are equivalent to one
Individual biphase staggered bi-directional DC/DC structure；When working in AC/DC rectification mode, the down tube work of two brachium pontis
In PWM mode, constitute without bridge APFC (passive power factor corrective) structure；Work in DC/AC pattern
Time, constitute single-phase inversion bridge construction.
Embodiment 2
The inductance value of inductance is determined by below equation:
In formula, L is inductance value, VinFor input voltage, D is dutycycle, ILFor inductive current, r is electricity
Flow liner ripple rate, f is switching frequency.
When alternating current path and the electric pressure of DC channel, electric current, switching frequency, the ripple rate etc. of design are joined
When number is close, exchange end inductance value and DC terminal inductance value are the most close, and by adjusted design parameter, first hands over
Stream end inductance 51, second exchanges end inductance 52 can be by the first DC terminal inductance 53 and the second DC terminal electricity
Sense 54 replacement, as it is shown in figure 5, thus save space and the cost of system further.
In the alternating current path of this embodiment, exchange interface 1 sequentially pass through transformator 2, electromagnetic interface filter 3,
It is connected respectively to the first DC terminal inductance 53 and the first DC terminal inductance 54 after exchange end switch 6, then distinguishes
Connect first device for power switching the 91, second device for power switching 92, the 3rd device for power switching 93,
The brachium pontis midpoint of four device for power switching 94 compositions.DC channel connected mode is identical with embodiment 1.
When system works in two-way DC/DC pattern, exchange end switch 6 disconnects, and DC terminal switch 15 closes
Close.When system works in AC/DC pattern, exchange end switch 6 closes, DC terminal switch 15 disconnection.
When system works in DC/AC pattern, exchange end switch 6 closes, DC terminal switch 15 disconnection.Different
Mode of operation, common DC end inductance 53 and DC terminal inductance 54.
The concrete operation principle of the present embodiment is substantially the same manner as Example 1, does not repeats, is compared to
Embodiment 1, the present embodiment shares inductance due to exchange end and DC terminal, saves volume and cost.
Embodiment 3
When input ac voltage peak value is(VacLFor alternating voltage virtual value minimum, VacHFor
Alternating voltage virtual value peak), the second DC terminal voltage scope is VdcL～VdcH(VdcLIt it is the second DC terminal
Minimum voltage, VdcHIt is the second DC terminal ceiling voltage), and meetTime, friendship can not be configured
Stream end transformator, exchange interface 1 directly connects with electromagnetic interface filter 3.As shown in Figure 6, this enforcement is real
Example is compared with embodiment 2, due to exchange interface 1 electric pressure and the second DC terminal interface 10 voltage etc.
Level meets above-mentioned requirements, can not use exchange end transformator, and the two ends of exchange interface 1 are directly and EMI
Wave filter 3 two ends connect, and other device connected modes are with embodiment 2.When system works in two-way DC/DC
During pattern, exchange end switch 6 disconnects, DC terminal switch 15 Guan Bi.When system works in AC/DC pattern
Time, exchange end switch 6 close, DC terminal switch 15 disconnection, line voltage through conversion after to set of cells
11 chargings.When system works in DC/AC pattern, exchange end switch 6 closes, and DC terminal switch 15 breaks
Open, after DC/AC inversion, it is provided that to AC electric equipment.
The concrete operation principle of the present embodiment is substantially the same manner as Example 1, does not repeats.
Claims (6)
1. an integrated multifunction power conversion system, it is characterised in that include exchanging interface, EMI filter
Ripple device, exchange end switch, the first DC terminal filter capacitor, the first DC terminal interface, DC terminal switch, the
Two DC terminal interfaces, set of cells, the second DC terminal filter capacitor, ECU, the first device for power switching,
Two device for power switching, the 3rd device for power switching and the 4th device for power switching；
Described exchange interface connects exchange end switch through electromagnetic interface filter, by exchange end switch and first
It is connected respectively to the first device for power switching, the second power switch after DC terminal inductance and the second DC terminal inductance
The brachium pontis midpoint that device, the 3rd device for power switching and the 4th set of power switches become；Or described friendship
Stream interface connects exchange end inductance respectively through electromagnetic interface filter and exchanges end inductance, is then opened by exchange end
Be connected respectively to behind pass the first device for power switching, the second device for power switching, the 3rd device for power switching and
The brachium pontis midpoint that 4th set of power switches becomes；
The both positive and negative polarity of described first DC terminal interface both positive and negative polarity with the first DC terminal filter capacitor respectively is connected,
The positive pole of the first DC terminal filter capacitor is divided into two-way after DC terminal switchs, and two-way is respectively through the first direct current
End inductance and the second DC terminal inductance connection to the first device for power switching, the second device for power switching, the 3rd
The brachium pontis midpoint that device for power switching and the 4th set of power switches become；
Described first device for power switching, the second device for power switching, the 3rd device for power switching and the 4th merit
Two brachium pontis of rate switching device composition are high-end, low side is respectively connected with, high-end, the low side difference of two brachium pontis
The both positive and negative polarity of the second DC terminal interface is connected with the both positive and negative polarity of the second DC terminal filter capacitor after being connected；Second is straight
The both positive and negative polarity of stream end interface connects the both positive and negative polarity of the set of cells of DC source respectively；
First current sensor and the second current sensor are connected respectively to the first device for power switching, the second merit
The brachium pontis midpoint that rate switching device, the 3rd device for power switching and the 4th set of power switches become, the 3rd electricity
Flow sensor is connected between the second DC terminal filter capacitor positive pole and the positive pole of the second DC terminal interface；First
The positive-negative input end of voltage sensor is connected to the alternating current path two ends after electromagnetic interface filter, the second voltage sensor
The positive-negative input end of device is connected to the first DC terminal interface two ends, and the positive-negative input end of tertiary voltage sensor is even
It is connected on the second DC terminal interface two ends；First voltage sensor, the second voltage sensor, tertiary voltage sense
Device, the first current sensor, the second current sensor and the 3rd current sensor are connected with ECU the most respectively.
Integrated multifunction power conversion system the most according to claim 1, it is characterised in that institute
State the first device for power switching, the second device for power switching, the 3rd device for power switching and the 4th power switch
Device is to be internally integrated a switching tube and the metal oxide semiconductcor field effect of an anti-parallel diodes
Answer transistor, SPM, insulated gate bipolar transistor, anti-parallel diodes negative electrode and switch
Pipe collector is connected, and anti-parallel diodes anode is connected with switching tube emitter stage.
Integrated multifunction power conversion system the most according to claim 2, it is characterised in that institute
The colelctor electrode of the emitter stage and the 4th device for power switching of stating the first device for power switching is connected, and forms one group of bridge
Arm, the collector terminal of the first device for power switching is that brachium pontis is high-end, the emitter stage of the first device for power switching and
The colelctor electrode junction of the 4th device for power switching is brachium pontis midpoint, and the transmitting of the 4th device for power switching is extremely
Brachium pontis low side, connects the first DC terminal interface and the negative pole of the second DC terminal interface；Second device for power switching
Emitter stage and the 3rd device for power switching colelctor electrode be connected, form another group brachium pontis, the second power switch
The collector terminal of device is that brachium pontis is high-end, the emitter stage of the second device for power switching and the 3rd device for power switching
Colelctor electrode junction be brachium pontis midpoint, the transmitting of the 3rd device for power switching extremely brachium pontis low side, connect the
One direct current end interface and the negative pole of the second DC terminal interface.
Integrated multifunction power conversion system the most according to claim 1, it is characterised in that institute
State exchange interface to sequentially pass through transformator and electromagnetic interface filter and connect and exchange end inductance.
Integrated multifunction power conversion system the most according to claim 1, it is characterised in that institute
The both positive and negative polarity stating the first DC terminal interface connects the both positive and negative polarity of super capacitor group respectively.
Integrated multifunction power conversion system the most according to claim 1, it is characterised in that institute
The both positive and negative polarity stating set of cells connects the both positive and negative polarity of electric machine controller, and electric machine controller connects three phase electric machine.
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| CN201610301033.9A CN105871205A (en) | 2016-05-06 | 2016-05-06 | Integrated multifunctional power source switching system |
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| CN201610301033.9A CN105871205A (en) | 2016-05-06 | 2016-05-06 | Integrated multifunctional power source switching system |
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| CN107042762A (en) * | 2016-11-29 | 2017-08-15 | 北京交通大学 | A kind of vehicle-mounted mixed energy storage system of rail vehicle and its application |
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| CN108667323A (en) * | 2018-06-25 | 2018-10-16 | 广州金升阳科技有限公司 | Alternating current-direct current input adaptive switching power circuit |
| CN109217708A (en) * | 2017-06-30 | 2019-01-15 | 意法半导体(图尔)公司 | Reversible AC-DC and DC-AC triacs converter |
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| CN110070983A (en) * | 2018-01-22 | 2019-07-30 | 广州汽车集团股份有限公司 | A kind of magnetic integrated inductor and energy conversion system for energy conversion system |
| CN112952944A (en) * | 2021-02-26 | 2021-06-11 | 广州智光储能科技有限公司 | Energy storage system |
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Application publication date: 20160817 |