CN110165923A - A kind of inverter circuit - Google Patents
A kind of inverter circuit Download PDFInfo
- Publication number
- CN110165923A CN110165923A CN201910449284.5A CN201910449284A CN110165923A CN 110165923 A CN110165923 A CN 110165923A CN 201910449284 A CN201910449284 A CN 201910449284A CN 110165923 A CN110165923 A CN 110165923A
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- switch
- circuit unit
- inverter circuit
- port
- switch module
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Classifications
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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
- H02M7/539—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 with automatic control of output wave form or frequency
- H02M7/5395—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 with automatic control of output wave form or frequency by pulse-width modulation
-
- 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
- H02M7/53871—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 with automatic control of output voltage or current
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of inverter circuits, it includes three-phase voltage source circuit unit, rectified three-phase circuit unit, inverter circuit unit.Compared with traditional phase three-wire three type PFC/APF/SVG etc., inverter circuit of the invention can be only with an inductance, it can also be two inductance concatenated equivalents in the loop by the inductor design according to specific requirements, and there is less switch motion, to reduce system cost, only three switching tube actions, switching loss are small in switch periods；Simple PWM carrier modulation can be used in inverter circuit, and control method is simple, and system effectiveness is higher.
Description
Technical field
The invention belongs to power electronics fields, and in particular to a kind of inverter circuit of low switching losses is suitable for three
Contrary becomes in application.
Background technique
Inverter circuit is very widely used.In existing various power supplys, battery, dry cell, solar battery etc.
It is all DC power supply, when needing these power supplys and public electric wire net positive energy exchange or powering to AC load, it is necessary to inversion electricity
Road；In addition, the electric power electricity such as Active Power Filter-APF, ac motor speed control frequency converter, uninterruptible power supply, induction heating power
For sub-device using widely, the core of circuit is all inverter circuit.
Conventional bridge inverter circuit has the advantages that at low cost, structure is simple, but there must be between upper and lower bridge arm dead
The problem of area, and conventional bridge inverter circuit controller design is complicated, system debug difficulty is big.Switch pressure resistance is total input electricity
Pressure, so that switch stress levels are higher, these problems limit inverter circuit switching frequency, cause switching loss higher.Simultaneously
Harmonic wave of output voltage rich content, it is all larger so as to cause the volume and loss of its output inductor.
Summary of the invention
The purpose of the present invention is to provide a kind of inverter circuits, and the circuit structure is simple, can be effectively reduced power device
Switching loss and conduction loss, be conducive to improve circuit efficiency.
A kind of inverter circuit provided by the invention, including voltage source circuit unit (1), rectification circuit unit (2), inversion electricity
Road unit (3).Wherein voltage source circuit unit (1) is made of three sinusoidal voltage sources that Ua, Ub, Uc tri- is in 120 °, Ua,
One end of Ub, Uc power supply connects together；Rectification circuit unit (2) is made of three switch modules 201,202,203, each switch
Module has 1,2,3 ports, and 1 port of switch module 201 is connected with the other end of Ua, 1 port of switch module 202 and Ub's
Another port is connected, and 1 port of switch module 203 is connected with the other end of Uc；2 ports of switch module 201,202,203 connect
It after being connected together, connects together with one end of inductance L1,3 ports of three switch modules (201,202,203) link together
Afterwards, one end with inductance L2 connects together；Inverter circuit unit (3) is made of switch module (301), and switch module (301) has
1,2 port, wherein 1 port is connected with the other end of inductance L1,2 ports are connected with the other end of inductance L2.
Preferably, switch module can be made up of by multiple power switch tubes from diode different combining forms.
Preferably, described its internal inverter circuit unit or three switch modules (201,202,203) are by multiple containing anti-
And the power switch of diode is formed by connecting by different modes.Its typical connection method is as shown in fig. 1.
Preferably, switch module switch used is made of the power switch tube containing anti-and diode in circuit, these power
Switching tube connection type is as shown in fig. 1, is commonly called as by the connection method to pipe.
Preferably, power switch tube is the combination of MOSFET, IGBT or diode.
Preferably, under the premise of implementing inductive current control, realize that electric current exists by switch module (201,202,203)
Reasonable distribution between three voltage sources.
Preferably, it by controlling rectified three-phase circuit unit, realizes in three-phase current and corresponding opens for maximum absolute value one
The switching of module low frequency is closed, in addition two corresponding switch module high frequency switchings, is conducive to reduce switching loss.
The invention has the benefit that compared with traditional phase three-wire three type PFC/APF/SVG etc., only with an inductance
(according to the related common sense of Circuit theory, directly thinking that two concatenated inductance of L1, L2 are equivalent to an inductance here), and have
Less switch motion, to reduce system cost, only three switching tube actions, switching loss are small in switch periods；Inversion electricity
Simple PWM carrier modulation can be used in road, and control method is simple, and system effectiveness is higher.
Detailed description of the invention
Fig. 1 is a kind of inverter circuit structural schematic diagram of the embodiment of the present invention 1.
Fig. 2 (1) and Fig. 2 (2) is the inductive current waveform control block diagram of the embodiment of the present invention 1.
Fig. 3 (1)~Fig. 3 (8) is rectified three-phase circuit unit of the invention typically several switch modules.
Fig. 4 (1)~Fig. 4 (6) is inverter circuit unit of the invention typically several switch modules.
Fig. 5 (1)~Fig. 5 (10) is several typical implementing circuit figures of the invention.
Fig. 6 is the three-phase current waveform diagram and section definition figure of the embodiment of the present invention 1.
Fig. 7 is the 1 current loop schematic diagram of section of the embodiment of the present invention 1.
Fig. 8 is the 1 current loop schematic diagram of section of the embodiment of the present invention 1.
Fig. 9 is the 1 current loop schematic diagram of section of the embodiment of the present invention 1.
Figure 10 is the 1 current loop schematic diagram of section of the embodiment of the present invention 1.
Figure 11 is the current loop schematic diagram in section 1 of the present invention derivative topological diagram 5 (1).
Figure 12 is a kind of inverter circuit structural schematic diagram of the invention.
Specific embodiment
In order to more specifically describe the present invention, with reference to the accompanying drawing and specific embodiment to technical solution of the present invention into
Row is described in detail.It is emphasized that following the description is only exemplary, the range that is not intended to be limiting of the invention and its
Using.
Referring to the following drawings, non-limiting and nonexcludability embodiment will be described, wherein identical appended drawing reference indicates
Identical component, unless stated otherwise.
Embodiment 1:
As shown in Figure 1, the present embodiment proposes a kind of inverter circuit, including voltage source circuit unit (1), rectification circuit list
First (2), inverter circuit unit (3).Wherein voltage source circuit (1) the three voltage source groups mutually symmetrical with by Ua, Ub, Uc three-phase
At one end of Ua, Ub, Uc power supply connects together, and the other end is connected with 1 port of rectification circuit (2) respectively；Rectification circuit unit
(2) it is made of three switch modules 201,202,203, each switch module has 1,2,3 ports, 1 port of switch module 201
It is connected with the other end of Ua, 1 port of switch module 202 is connected with the another port of Ub, 1 port of switch module 203 and Uc
The other end be connected；After 2 ports of switch module 201,202,203 link together, connect together with one end of inductance L1, three
After 3 ports of a switch module (201,202,203) link together, connect together with one end of inductance L2；Inverter circuit list
First (3) are made of S13, S14, S15, S16 and capacitor C1, and the collector of S13, the collector of S14 are connected with the anode of capacitor C1,
The emitter of S13, the collector of S15 are connected with the other end of inductance L1, the emitter of S14, the collector of S16 and inductance L2
The other end is connected, and the emitter of S15, the emitter of S16 are connected with the cathode of capacitor C1.
As shown in Figure 1, the switch module in the rectification circuit unit (2) of the present embodiment are as follows: the current collection of 2 ports and switch S1
Extremely it is connected, the emitter of switch S1 is connected with the collector of switch S2, the emitter of switch S2, the collector of switch S3 and 1 end
Mouth is connected, and the emitter of switch S3 is extremely connected with the collector of switch S4, and the emitter of switch S4 is connected with 3 ports.
As shown in Figure 1, the switch in the present embodiment in rectification circuit unit (2) or inverter circuit unit is anti-by band and two poles
The power switch tube of pipe is composed.The power switch tube can manage for metal-oxide-semiconductor, IGBT, and those skilled in the art should manage
It solves, the present invention is not limited to above two semiconductor power switch pipe, can also be the power of other executable switch operations
Element.
Those of ordinary skill in the art are without excessive thinking, by introducing diode in place part MOS or IGBT etc., or
Person suitably changes the connection method means of these switching tubes, you can get it other various possible switch modules, wherein several allusion quotations
Switch module in the rectified three-phase circuit unit of type refers to Fig. 3 (1)~Fig. 3 (8).
Shown in several typical rectification module such as Fig. 4 (the 1)~Fig. 4 (6) obtained by the combination of switch module, but it is practical
In combination be not limited to these types, can not be exhaustive in present specification, as long as it meets substantive content of the invention, by phase
Pass field personnel are easily deformed to obtain, all within scope of authority of the invention.Those of ordinary skill in the art were not necessarily to think much
It examines, a variety of complete topologies that you can get it is combined by various possible switch modules, wherein several typically by various possibility
Complete topology such as Fig. 5 (1)~Fig. 5 (10) for being combined into of switch module shown in, but combination in practice is not limited to these types.
A kind of a kind of control thought of inverter circuit are as follows: under the premise of inductive current is stablized by control, pass through switching molding
Block (201,202,203) realizes reasonable distribution of the inductive current between three voltage sources.
As shown in Figure 1, since there may be jumps or polarity mutation, the present embodiment to show for the voltage signal that actually enters
A kind of inverter circuit also includes input filter, and the input filter is arranged in rectification circuit unit front end, rectifier bridge
It exports electric current and enters power grid after filter filtering；In other alternative embodiments except this embodiment, filter can also be added
Wave device meets essence of the invention.
Since input is three-phase three-wire system, three-phase current meets formula (1), and electric current positive direction as shown in Figure 6 then has:
ia+ib+ic=0 (1)
It should be pointed out that even there is the system of distortion to this kind of electric current of filter of having chance with, as long as its three-phase current
Meet above-mentioned formula (1), circuit of the invention and method of controlling are still applicable in.For without loss of generality, herein for sinusoidal current into
Row analysis is as shown in fig. 6, A represents A phase current, and B represents B phase current, and C represents C phase current；For the convenience of description, setting three-phase electricity
120 ° of pressure difference, every 360 ° circulations；In view of stating intuitive and convenient, with the change point of current absolute value maximum phase, divide
Section 1-6 out.
Without loss of generality, if system works in section 1, as shown in fig. 6, the absolute value of the interval B phase current is greater than separately
The absolute value of biphase current, and B phase current is negative, A, C phase current are positive.According to inductive current direction difference, which can work
Make in two states.
If inductive current as shown in iL in Fig. 7, is connected in this section S9, the anti-and diode formed from S9 through S10 is logical
Road, inductive current are flowed out from B phase always, and S10 can also be connected as synchronous rectification.S1 and S5 are controlled by PWM wave, form S1 through S2
The anti-and diode paths of anti-and diode paths and S5 through S6, the duty ratio size of S1 and S5 obtains by controller respectively,
To realize distributing according to preset ratio for the two channel currents.In this section, switching tube S3, S4, S7, S8, S11, S12 are
Off state；The driving signal of S2, S6, S10 can flow through the anti-and diode of these pipes for shutdown, electric current；Or
In S1, S5, S9 conducting, synchronous rectification is easy to implement for high level.The driving signal of S13 depend on its unipolarity for using or
The engineering staff of double modulation mode, this field can select according to spirit.Electric current in the present embodiment, in section 1
Circuit diagram is as shown in Figure 7,8.Fig. 7 is the circuit that electric current flows through A, B two-phase, and Fig. 8 is the circuit that electric current flows through C, B two-phase.
If inductive current as shown in iL in Fig. 9, is connected in this section S4, the anti-and diode formed from S4 through S3 is logical
Road, inductive current are flowed out from B phase always, and S3 can also be connected as synchronous rectification.S8 and S12 are controlled by PWM wave, form S8 through S7
The anti-and diode paths of anti-and diode paths and S12 through S11, the duty ratio size of S8 and S12 obtains by controller respectively
It arrives, to realize distributing according to preset ratio for the two channel currents.In this section, switching tube S1, S2, S5, S6, S9, S10
For off state；The driving signal of S3, S3, S11 can flow through the anti-and diode of these pipes for shutdown, electric current；It can also be with
To be easy to implement synchronous rectification for high level in S4, S8, S12 conducting.The driving signal of S13 depends on its monopole used
Property or double modulation mode, the engineering staff of this field can select according to spirit.At this point, the electric current in section 1 returns
Road schematic diagram is as shown in Figures 9 and 10.Fig. 9 is the circuit that electric current flows through A, B two-phase, and Figure 10 is the circuit that electric current flows through C, B two-phase.
Likewise, remaining some flexible circuit of the invention can also complete identical function, for example, to Fig. 5 (1), work
Make that circuit is as shown in Figure 11, similar with the working principle being described above, which is not described herein again.
Inductive current waveform is controlled by inverter circuit unit.In the present embodiment, the waveform control block diagram of inductive current is such as
Shown in Fig. 2 (1) and Fig. 2 (2).Wherein Fig. 2 (1) is controller, includes common PID or resonance, the control strategies such as repetition etc.；
Fig. 2 (2) is the given explanation to controller, in the present invention, can be designed according to specific system and obtaining current is needed to be given as Fig. 2
(2) coenvelope line or lower envelope line in, can also be taken as the mixing of upper and lower envelope, main idea is that inductive current is given
Fixed absolute value is identical with the maximum value in three-phase symmetrical given value of current absolute value.
Main idea of the invention is, inverter circuit unit is matched by inductance and rectification circuit unit (201,202,203)
Close, wherein inverter circuit either as in Fig. 4 (1)~Fig. 4 (6) half-bridge, full-bridge, three level or its in the present invention is not written
Remaining inverter circuit, as long as the cooperation with rectification circuit unit, inductance L1 as in figure 1, should all fall into required by the present invention
Protection scope within.
Be connected by the rectification unit that switch module any in Fig. 3 (1)~Fig. 3 (8) is constituted with power grid, and by inductance with it is inverse
Become unit (structure as shown in Figure 12), the circuit topology of composition, all within protection scope of the present invention.
Those skilled in the art will appreciate that.It is possible for making numerous accommodations to above description, so embodiment is only
For describing one or more particular implementations.
The above be only preferred exemplary implementations of the invention are described, not to the scope of the present invention into
Row limits, and without departing from the spirit of the design of the present invention, those of ordinary skill in the art make technical solution of the present invention
Various changes and improvements out should all be fallen into the protection scope that claims of the present invention determines.
Claims (5)
1. a kind of inverter circuit, it is characterised in that: including voltage source circuit unit (1), rectification circuit unit (2), inverter circuit
Unit (3), wherein voltage source circuit unit (1) is made of three voltage sources Ua, Ub, Uc, and one end of Ua, Ub, Uc power supply is connected in
Together；Rectification circuit unit (2) is made of three switch modules (201,202,203), and each switch module has 1,2,3 ends
Mouthful, 1 port of switch module (201) is connected with the other end of Ua, 1 port of switch module (202) and the another port phase of Ub
Even, 1 port of switch module (203) is connected with the other end of Uc；The 2 ports connection of three switch modules (201,202,203)
After together, connect together with one end of inductance L1, after 3 ports of three switch modules (201,202,203) link together,
It connects together with one end of inductance L2；Inverter circuit unit (3) is made of switch module (301), and switch module (301) has 1,2
Port, wherein 1 port is connected with the other end of inductance L1,2 ports are connected with the other end of inductance L2.
2. inverter circuit as described in claim 1, it is characterised in that: the switch module (201) include concatenated switch S1,
S2, S7 and S8 are 1 port between S2 and S7, and one end of S1 is 2 ports, and one end of S8 is 3 ports；The switch module (202)
It is 1 port between S4 and S9 including concatenated switch S3, S4, S9 and S10, one end of S3 is 2 ports, and one end of S10 is 3 ends
Mouthful；The switch module (203) includes concatenated switch S5, S6, S11 and S12, is 1 port, one end of S5 between S6 and S11
For 2 ports, one end of S12 is 3 ports.
3. inverter circuit as claimed in claim 2, it is characterised in that: the switch S1~S12 is by containing anti-and diode
Power switch tube constitute.
4. inverter circuit as claimed in claim 3, it is characterised in that: the power switch tube is MOSFET, IGBT or two
Pole pipe.
5. the inverter circuit as described in Claims 1 to 4 any claim, it is characterised in that: it further include input filter, institute
It states input filter to be arranged in rectification circuit unit (2) front end, the power supply of voltage source circuit unit (1) is through input filter
The rectification circuit unit (2) is accessed after filtering.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910449284.5A CN110165923A (en) | 2019-05-28 | 2019-05-28 | A kind of inverter circuit |
| CN202010313614.0A CN111327222B (en) | 2019-05-28 | 2020-04-20 | Current conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910449284.5A CN110165923A (en) | 2019-05-28 | 2019-05-28 | A kind of inverter circuit |
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| Publication Number | Publication Date |
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| CN110165923A true CN110165923A (en) | 2019-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910449284.5A Pending CN110165923A (en) | 2019-05-28 | 2019-05-28 | A kind of inverter circuit |
| CN202010313614.0A Active CN111327222B (en) | 2019-05-28 | 2020-04-20 | Current conversion circuit |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010313614.0A Active CN111327222B (en) | 2019-05-28 | 2020-04-20 | Current conversion circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111327222A (en) * | 2019-05-28 | 2020-06-23 | 南昌杜迪电子技术有限公司 | Current transformation circuit |
| WO2023098217A1 (en) * | 2021-11-30 | 2023-06-08 | 刘三英 | Two-level three-phase rectification corrector and control method therefor |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104796030B (en) * | 2015-04-21 | 2017-09-22 | 西安理工大学 | Single-phase photovoltaic off-grid inverter and its soft switching control method based on quasi- Z-source inverter |
| CN105656077A (en) * | 2016-01-22 | 2016-06-08 | 江苏大学 | Efficient low-leakage current seven-switch photovoltaic grid-connected inverter circuit and modulation method thereof |
| CN106411171A (en) * | 2016-10-14 | 2017-02-15 | 江苏大学 | Transformer-free type low-leakage-current photovoltaic grid-connected inverter circuit with active clamp and modulation method thereof |
| CN106505872B (en) * | 2016-12-27 | 2019-03-22 | 威胜集团有限公司 | A kind of high-frequency chain inverter |
| CN106787914A (en) * | 2017-03-03 | 2017-05-31 | 燕山大学 | LC series resonance-type three-phases high frequency chain matrix inverter topology and modulator approach |
| CN106972603B (en) * | 2017-05-11 | 2019-06-11 | 湖南大学 | A kind of V2G charger and its control method using High Frequency Link matrix converter |
| CN107707143A (en) * | 2017-09-12 | 2018-02-16 | 燕山大学 | A kind of three-phase four-arm high frequency chain matrix rectifier topology and modulator approach |
| CN107493023B (en) * | 2017-09-18 | 2019-07-26 | 燕山大学 | A kind of non-isolated Zeta three-phase no electrolytic capacitor lifting press rectification circuit of single-stage |
| CN109167524B (en) * | 2018-11-06 | 2024-06-07 | 南京熊猫电子股份有限公司 | Three-phase alternating-current/direct-current buck-boost conversion circuit and control method thereof |
| CN110165923A (en) * | 2019-05-28 | 2019-08-23 | 南昌杜迪电子技术有限公司 | A kind of inverter circuit |
| CN209767411U (en) * | 2019-05-28 | 2019-12-10 | 南昌杜迪电子技术有限公司 | Current transformation circuit |
-
2019
- 2019-05-28 CN CN201910449284.5A patent/CN110165923A/en active Pending
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- 2020-04-20 CN CN202010313614.0A patent/CN111327222B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111327222A (en) * | 2019-05-28 | 2020-06-23 | 南昌杜迪电子技术有限公司 | Current transformation circuit |
| CN111327222B (en) * | 2019-05-28 | 2023-08-08 | 南昌杜迪电子技术有限公司 | Current conversion circuit |
| WO2023098217A1 (en) * | 2021-11-30 | 2023-06-08 | 刘三英 | Two-level three-phase rectification corrector and control method therefor |
Also Published As
| Publication number | Publication date |
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| CN111327222A (en) | 2020-06-23 |
| CN111327222B (en) | 2023-08-08 |
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