CN106208788A - A kind of multimode voltage source inverter based on AAC - Google Patents
A kind of multimode voltage source inverter based on AAC Download PDFInfo
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- CN106208788A CN106208788A CN201610739977.4A CN201610739977A CN106208788A CN 106208788 A CN106208788 A CN 106208788A CN 201610739977 A CN201610739977 A CN 201610739977A CN 106208788 A CN106208788 A CN 106208788A
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- brachium pontis
- aac
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- high frequency
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- 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
-
- 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
- H02M1/14—Arrangements for reducing ripples from dc input or output
- H02M1/15—Arrangements for reducing ripples from dc input or output using active elements
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of multimode voltage source inverter based on AAC, including a LC wave filter and the full bridge structure that is made up of at least four AAC brachium pontis, H abutment frequency brachium pontis leading-out terminal in the upper brachium pontis of AAC is connected with positive source outfan, and under AAC, the frequency of the H abutment in brachium pontis brachium pontis leading-out terminal is connected with power cathode outfan；Each AAC brachium pontis includes a H-bridge unit, a brachium pontis reactor and a brachium pontis conducting switch, H-bridge unit is made up of parallel join fundamental frequency brachium pontis and a high frequency brachium pontis, fundamental frequency brachium pontis is in series with the full control switch of anti-paralleled diode by two, and the emitter stage of a full control switch accesses the colelctor electrode of another switch；Electric capacity of voltage regulation it is parallel with in H-bridge unit.The inverter volume of the present invention is little, it is possible to realize the low-voltage direct conversion to high-voltage alternating, uses phase-shifting carrier wave to control to improve system frequency, and it is relatively low that each device for power switching bears DC voltage, and easily expands capacity.
Description
Technical field
The present invention relates to field of electrical components, be specifically related to a kind of multimode voltage source inverter based on AAC.
Background technology
Along with the quickening day by day of social development speed, the demand of the energy is improved constantly by the mankind, fossil energy the most withered
Exhaust and social development is to the contradiction between the high demand of the energy, force people increasingly to pay close attention to exploitation and the profit of regenerative resource
With, the renewable generation of electricity by new energy technology such as wind energy based on battery energy storage system, solar energy, biomass energy, geothermal energy, tide energy
Obtain unprecedented developing rapidly.
Under normal circumstances, the output DC voltage of grid-connected power generation system is relatively low, due to traditional voltage source inverter
(VSI) being a kind of buck converter, this DC side input voltage being accomplished by VSI is greater than the voltage peak of AC output,
And the output voltage of renewable energy system is usually less than AC voltage peak.The most sinusoidal for obtaining at AC
Voltage, conventional two-stage type VSI structure has front end to tie with Industrial Frequency Transformer with the two-stage type VSI of Boost structure and rear end
The two-stage type VSI of structure.The problem that these structures existing exist:
1. switch all works in high frequency state, and switching loss is big；
2.DC-AC power conversion principle is always constrained to the voltage of DC side and AC；
3. device is difficult to Integrated design；
4. switching tube bears bigger voltage stress；
5. current ripples causes more greatly wave filter volume bigger；
6., due to two-stage type structure, circuit work efficiency is the highest.
Summary of the invention
For solving the problems referred to above, the invention provides a kind of multimode voltage source inverter based on AAC brachium pontis, volume
Little, low-voltage direct can be realized and convert to high-voltage alternating, produce an equal amount of alternating voltage, the DC side input voltage of this VSI
Only it is required to be the half of tradition VSI, thus is more applicable for house low pressure PV system and battery energy storage system, owning in this VSI
The voltage stress that switching tube bears is only the half of traditional structure switching tube, so this VSI can apply the switch of low-voltage-grade
Pipe.This VSI uses the regulation and control of PWM phase-shifting carrier wave, can increase the equivalent switching frequency of circuit, thus reduce the wave filter connect thereafter
Volume.
For achieving the above object, the technical scheme that the present invention takes is:
A kind of multimode voltage source inverter based on AAC, including a LC wave filter with by least four AAC brachium pontis
The full bridge structure constituted, the H abutment frequency brachium pontis leading-out terminal in the upper brachium pontis of AAC is connected with positive source outfan, bridge under AAC
H abutment frequency brachium pontis leading-out terminal in arm is connected with power cathode outfan；Each AAC brachium pontis include a H-bridge unit, one
Individual brachium pontis reactor (Lr1, Lr2, Lr3, Lr4) and brachium pontis conducting switch (DS1, DS2, DS3, DS4)；H-bridge unit is by also
A fundamental frequency brachium pontis and high frequency brachium pontis that row connects are constituted, fundamental frequency brachium pontis by two with anti-paralleled diode (Db1-
Db8, Dh1-Dh8) full control switch be in series: the emitter stage of a full control switch accesses the current collection of another control switch entirely
Pole；High frequency brachium pontis is in series with the full control switch of anti-paralleled diode by two: the emitter stage of a full control switch accesses
The colelctor electrode of another switch；Be parallel with electric capacity of voltage regulation (C1-C4) in H-bridge unit, the input and output terminal of H-bridge unit respectively by
Drawing at two full-bridge switch series connection nodes of fundamental frequency brachium pontis and high frequency brachium pontis, the upper brachium pontis (brachium pontis 1/3) of AAC is by H-bridge unit
High frequency brachium pontis leading-out terminal and brachium pontis conducting switch and brachium pontis reactor connect and constitute, high frequency brachium pontis leading-out terminal connects brachium pontis
Conducting switch colelctor electrode, brachium pontis reactor be connected on brachium pontis conducting switch emitter stage, the lower brachium pontis (brachium pontis 2/4) of AAC, by
The high frequency brachium pontis leading-out terminal of H-bridge unit is connected with brachium pontis conducting switch and brachium pontis reactor and is constituted, high frequency brachium pontis exit
Son connects the emitter stage of brachium pontis conducting switch, and brachium pontis reactor is connected on the colelctor electrode of brachium pontis conducting switch；The upper brachium pontis of AAC with
The lower brachium pontis of AAC is connected in series at inductance, constitutes the half-bridge structure of full-bridge inverter, brachium pontis on the AAC of two half-bridge structures
In fundamental frequency brachium pontis leading-out terminal and the fundamental frequency corresponding connection of brachium pontis leading-out terminal in brachium pontis under AAC, described LC wave filter
By 2 symmetrical separating filtering inductance Lf1、Lf2And a filter capacitor CfComposition, two brachium pontis reactor joint in two half-bridge structures
Drawing two AC output terminal at Dian respectively, two AC output terminal are connected on separating filtering inductance L respectivelyf1、Lf2On.
Preferably, the input of described DC source is parallel with voltage regulation capacitor (Cdc).
Preferably, described brachium pontis conducting switch is by a power IGBT (S1-with anti-paralleled diode (D1-D4)
S4) constitute.
Preferably, the described gate-controlled switch in high frequency brachium pontis all use high frequency quick performance good entirely control switch, circuit
In modulated process when power switch turns off, energy can be by the anti-paralleled diode reverse circulated of IGBT.
Preferably, described full control switch can be selected for the low frequency insulated gate bipolar transistor of band anti-paralleled diode
(IGBT), when power switch turns off, energy can pass through its anti-paralleled diode reverse circulated.
Preferably, the HVDC Modulation ratio of described inverter is 0.5, and ac modulation is 0-1.5 than scope.
Preferably, on described inverter difference diagonal angle, the mixing alternating current-direct current modulated signal of AAC brachium pontis differs 180 in phase place
Degree.
Preferably, under the upper brachium pontis of AAC and AAC, the high frequency brachium pontis in the H-bridge unit of brachium pontis have employed unipolarity phase-shifting carrier wave
Technology is modulated, and the 360 °/n that staggers (n is the quantity of AAC brachium pontis in upper and lower bridge arm) angle turns on.
The present invention uses AAC elementary cell to constitute full bridge structure, and in inverter AAC upper and lower bridge arm, the HF switch of H bridge is adopted
Take phase shift modulation, reach to reduce current ripple, reduce inductance volume, reduction switching loss, improve system effectiveness, the most all right
Expand capacity；In AAC brachium pontis, the fundamental frequency switch of H bridge cooperates with HF switch so that produce sine voltage；AAC brachium pontis
The fundamental frequency switch of middle H bridge cooperates with HF switch so that produce sine voltage；The capacitor of H bridge in AAC brachium pontis, rises
To the effect of burning voltage, and provide enough energy when circuit carries out boosting inverter for AC；Reactance in AAC brachium pontis
Device changes for buffer current, thus reduces bridge arm current ripple；Conducting switch in AAC brachium pontis in fundamental frequency state,
Control energy flux during inverter circuit work.
Compared with prior art, the method have the advantages that
1, the multimode voltage source inverter that the present invention provides is under same ac modulation ratio, exports identical alternating voltage
Required DC voltage is only the half of conventional full bridge converter DC voltage, and therefore this structure is highly suitable to be applied for
Residence low-voltage photovoltaic generating system and battery energy storage system；
2, the multimode voltage source inverter that the present invention provides, the maximum voltage stress that each switching tube bears is DC side
Input voltage, compared to conventional full bridge converter, can use the power switch pipe of low voltage grade；
3, in the multimode voltage source inverter that the present invention provides, full bridge unit uses fundamental frequency-high frequency hybrid modulation skill
Art, Partial Power switching tube is in fundamental frequency duty, effectively reduces the switching loss of power device；
4, the multimode voltage source inverter that the present invention provides uses PWM phase-shifting carrier wave modulation technique to be effectively increased power
The equivalent switching frequency of device, efficiently reduces the volume of exchange outlet side wave filter；
5, when the multimode voltage source inverter AC that the present invention provides breaks down, can turn on by turning off brachium pontis
Circuit is protected by switch, the overvoltage in energy-storage travelling wave tube transient process caused circuit power device when effectively prevent fault
The problems such as impact.
Accompanying drawing explanation
Fig. 1 is the topological structure schematic diagram of a kind of multimode voltage source inverter based on AAC of the embodiment of the present invention.
Fig. 2 is duty topological structure schematic diagram during AC modulated signals 0≤msin≤0.5 in Fig. 1.
Fig. 3 is duty topological structure schematic diagram during AC modulated signals-0.5≤msin≤0 in Fig. 1.
Fig. 4 is duty topological structure schematic diagram during AC modulated signals-1.0≤msin≤-0.5 in Fig. 1.
Fig. 5 is duty topological structure schematic diagram during AC modulated signals-1.5≤msin≤-1.0 in Fig. 1.
Detailed description of the invention
In order to make objects and advantages of the present invention clearer, below in conjunction with embodiment, the present invention is carried out further
Describe in detail.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not used to limit this
Bright.
As it is shown in figure 1, embodiments provide a kind of multimode voltage source inverter based on AAC, including one
Individual LC wave filter and the full bridge structure being made up of at least four AAC brachium pontis, each AAC brachium pontis includes a H-bridge unit, a bridge
Arm reactor (Lr1, Lr2, Lr3, Lr4) and conducting switch (DS1, DS2, DS3, DS4).For H-bridge unit, by a base
Frequently brachium pontis and high frequency brachium pontis are constituted, and fundamental frequency brachium pontis is by two complete with anti-paralleled diode (Db1-Db8, Dh1-Dh8)
Control switch is in series: the emitter stage of a full control switch accesses the colelctor electrode of another switch；High frequency brachium pontis by two with
The full control switch of anti-paralleled diode is in series: the emitter stage of a full control switch accesses the colelctor electrode of another switch；Will
Fundamental frequency brachium pontis and high frequency brachium pontis parallel join i.e. may make up the H bridge construction of mixed base frequency-high frequency modulated；For make voltage stabilization and
Enough energy are provided during boosting inverter, in parallel electric capacity of voltage regulation (C1-C4) on H bridge；For H bridge input and output terminal, then
Drawn by two full-bridge switch series connection nodes of fundamental frequency brachium pontis and high frequency brachium pontis respectively.For brachium pontis on AAC (brachium pontis 1/3),
Connected by H bridge high frequency brachium pontis leading-out terminal with brachium pontis conducting switch and brachium pontis reactor and constitute, wherein high frequency brachium pontis exit
Son connects the colelctor electrode of brachium pontis conducting switch, and brachium pontis reactor is then connected on the emitter stage of brachium pontis conducting switch.For brachium pontis under AAC
(brachium pontis 2/4), is connected by H bridge high frequency brachium pontis leading-out terminal with brachium pontis conducting switch and brachium pontis reactor and constitutes, with bridge on AAC
Unlike arm, wherein high frequency brachium pontis leading-out terminal connects the emitter stage of brachium pontis conducting switch, and brachium pontis reactor is then connected on bridge
The colelctor electrode of arm conducting switch.Upper and lower for AAC two brachium pontis are serially connected at inductance, i.e. may make up this full-bridge inverting
The half-bridge structure of device.By two such half-bridge structures, by the fundamental frequency corresponding connection of brachium pontis leading-out terminal in upper and lower bridge arm H bridge
Together, i.e. may make up multimode voltage-source type boosting inverter structure based on AAC, the fundamental frequency in brachium pontis on AAC therein
Brachium pontis leading-out terminal is as the electrode input end of DC source, and under AAC, the fundamental frequency brachium pontis leading-out terminal in brachium pontis is as unidirectional current
The negative input in source.DC voltage for making input is more stable, input at DC source is in parallel voltage regulation capacitor
(Cdc).For the outfan of this boosting inverter, in two half-bridge structures, draw two respectively at two brachium pontis reactor nodes
Individual AC output terminal, for reducing AC voltage, the ripple of current waveform, devises by two symmetrical separation inductance Lf1、Lf2
With a filter capacitor CfThe LC wave filter being in series, two AC output terminal are connected on two respectively and separate inductance Lf1、
Lf2On.Gate-controlled switch uses and entirely controls switch with anti-paralleled diode, such as insulated gate bipolar transistor (IGBT) etc., and can be
Energy channel is provided for circuit during switch OFF.
A kind of based on AAC brachium pontis the multimode voltage-source type boosting full-bridge inverter of the present invention, HVDC Modulation ratio is
0.5, ac modulation is 0-1.5 than scope, and the mixing alternating current-direct current modulated signal of AAC brachium pontis on this full-bridge inverter difference diagonal angle
Phase place differs 180 degree.High frequency brachium pontis in the H bridge of the upper and lower bridge arm of this full-bridge inverter have employed unipolarity phase-shifting carrier wave
Technology is modulated, and the 360 °/n that staggers (n is the quantity of AAC brachium pontis in upper and lower bridge arm) angle turns on, and so can reduce switching loss,
Reduce current ripple, improve system frequency, efficiency is greatly improved, can come not by the way of being continuously increased AAC brachium pontis
Disconnected expansion power system capacity, makes system with dilatation function.For the fundamental frequency brachium pontis in AAC brachium pontis H bridge, when modulated signal is more than 0
Time, switching tube Sb1, Sb3, Sb5, Sb7 are in the conduction state for fundamental frequency, and Sb2, Sb4, Sb6, Sb8 are off state；Otherwise, then
Sb1, Sb3, Sb5, Sb7 are off state, and Sb2, Sb4, Sb6, Sb8 are in the conduction state.Conducting in AAC brachium pontis is opened
Closing, when the modulated signal that brachium pontis is corresponding is more than 1, the conducting switch of this brachium pontis is off state, otherwise at this conducting switch
In conducting state, thus control the energy Flow in circuit.By the fundamental frequency switching tube in this inverter and HF switch pipe
Cooperate, add the effect of LC wave filter, perfect sine wave can be exported.
It is duty topological structure schematic diagram during AC modulated signals 0≤msin≤0.5 with reference to Fig. 2.This area skill
Art personnel are according to just can significantly know four kinds of duties under AC modulated signals 0≤msin≤0.5 with reference to Fig. 2.
It is duty topological structure schematic diagram during AC modulated signals-0.5≤msin≤0 with reference to Fig. 3.This area skill
Art personnel are according to just can significantly know four kinds of duties under AC modulated signals-0.5≤msin≤0 with reference to Fig. 3.
It is duty topological structure schematic diagram during AC modulated signals-1.0≤msin≤-0.5 with reference to Fig. 4.Ability
Field technique personnel are according to just can significantly know four kinds of works under AC modulated signals-1.0≤msin≤-0.5 with reference to Fig. 4
Make state.
It is duty topological structure schematic diagram during AC modulated signals-1.5≤msin≤-1.0 with reference to Fig. 5.Ability
Field technique personnel are according to just can significantly know four kinds of works under AC modulated signals-1.5≤msin≤-1.0 with reference to Fig. 5
Make state.The above is only the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should regard
For protection scope of the present invention.
Claims (8)
1. a multimode voltage source inverter based on AAC, it is characterised in that include a LC wave filter and by least four
The full bridge structure that individual AAC brachium pontis is constituted, the H abutment frequency brachium pontis leading-out terminal in the upper brachium pontis of AAC is connected with positive source outfan
Connecing, under AAC, the frequency of the H abutment in brachium pontis brachium pontis leading-out terminal is connected with power cathode outfan；Each AAC brachium pontis includes one
H-bridge unit, a brachium pontis reactor and a brachium pontis conducting switch；H-bridge unit is by parallel join fundamental frequency brachium pontis and
Individual high frequency brachium pontis is constituted, and fundamental frequency brachium pontis is in series with the full control switch of anti-paralleled diode by two: a full control switch
Emitter stage access the colelctor electrode of another full control switch；High frequency brachium pontis is controlled switch series by two entirely with anti-paralleled diode
Connection forms: the emitter stage of a full control switch accesses the colelctor electrode of another switch；Electric capacity of voltage regulation, H bridge it is parallel with in H-bridge unit
The input and output terminal of unit is drawn by two full-bridge switch series connection nodes of fundamental frequency brachium pontis and high frequency brachium pontis respectively, AAC's
Upper brachium pontis is connected by the high frequency brachium pontis leading-out terminal of H-bridge unit with brachium pontis conducting switch and brachium pontis reactor and is constituted, high frequency bridge
Arm leading-out terminal connects the colelctor electrode of brachium pontis conducting switch, and brachium pontis reactor is connected on the emitter stage of brachium pontis conducting switch, under AAC
Brachium pontis, is connected by the high frequency brachium pontis leading-out terminal of H-bridge unit with brachium pontis conducting switch and brachium pontis reactor and constitutes, high frequency brachium pontis
Leading-out terminal connects the emitter stage of brachium pontis conducting switch, and brachium pontis reactor is connected on the colelctor electrode of brachium pontis conducting switch；The upper bridge of AAC
Arm and the lower brachium pontis of AAC are connected in series at inductance, constitute the half-bridge structure of full-bridge inverter, on the AAC of two half-bridge structures
Fundamental frequency brachium pontis leading-out terminal in brachium pontis and the fundamental frequency corresponding connection of brachium pontis leading-out terminal in brachium pontis under AAC, described LC filter
Ripple device is by 2 symmetrical separating filtering inductance Lf1、Lf2And a filter capacitor CfComposition, two brachium pontis reactance in two half-bridge structures
Drawing two AC output terminal at device node respectively, two AC output terminal are connected on separating filtering inductance L respectivelyf1、Lf2
On.
A kind of multimode voltage source inverter based on AAC the most according to claim 1, it is characterised in that described directly
The input of stream power supply is parallel with voltage regulation capacitor.
A kind of multimode voltage source inverter based on AAC the most according to claim 1, it is characterised in that described
Brachium pontis conducting switch is constituted with the power IGBT (S1-S4) of anti-paralleled diode by one.
A kind of multimode voltage source inverter based on AAC the most according to claim 1, it is characterised in that described
Gate-controlled switch in high frequency brachium pontis all use high frequency quick performance good entirely control switch, in circuit modulated process when power switch close
Time disconnected, energy can be by the anti-paralleled diode reverse circulated of IGBT.
A kind of multimode voltage source inverter based on AAC the most according to claim 4, it is characterised in that described
Full control switch can be selected for the low frequency insulated gate bipolar transistor of band anti-paralleled diode.
A kind of multimode voltage source inverter based on AAC the most according to claim 1, it is characterised in that described inverse
The HVDC Modulation ratio becoming device is 0.5, and ac modulation is 0-1.5 than scope.
A kind of multimode voltage source inverter based on AAC the most according to claim 1, it is characterised in that described inverse
Become the mixing alternating current-direct current modulated signal of AAC brachium pontis on device difference diagonal angle in phase place, differ 180 degree.
A kind of multimode voltage source inverter based on AAC the most according to claim 1, it is characterised in that the upper bridge of AAC
Under arm and AAC, the high frequency brachium pontis in the H-bridge unit of brachium pontis have employed the modulation of unipolarity phase-shifting carrier wave technology, and stagger 360 °/n angle
Conducting, the quantity of AAC brachium pontis during wherein n is upper and lower bridge arm.
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Cited By (3)
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| CN109800381A (en) * | 2019-03-22 | 2019-05-24 | 清华大学 | The direct-current short circuit current calculation method and system of modularization multi-level converter |
| CN111869085A (en) * | 2018-06-30 | 2020-10-30 | 华为技术有限公司 | Rectifier, driving method thereof, chip and power equipment |
| CN113037121A (en) * | 2021-03-25 | 2021-06-25 | 郑州轻工业大学 | H-bridge-based low carrier ratio modular spread spectrum inverter circuit and control method |
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