CN108551267A - The high voltage frequency converter of power cell composition - Google Patents
The high voltage frequency converter of power cell composition Download PDFInfo
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- CN108551267A CN108551267A CN201810661656.6A CN201810661656A CN108551267A CN 108551267 A CN108551267 A CN 108551267A CN 201810661656 A CN201810661656 A CN 201810661656A CN 108551267 A CN108551267 A CN 108551267A
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- power cell
- insulated gate
- gate bipolar
- bipolar transistor
- power
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- 239000000203 mixture Substances 0.000 title claims abstract description 11
- 239000003990 capacitor Substances 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims 1
- 239000010409 thin film Substances 0.000 description 7
- 230000005611 electricity Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled 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
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The present invention relates to the high voltage frequency converters of power cell composition,Technical solution is,Rectification module includes 6 power cell A1,A2,B1,B2,C1,C2,DC Module includes concatenated capacitance C1,C2,C3,C4 and concatenated resistance R1,R2,R3,R4,Inverter module includes 6 power cell U1,U2,V1,V2,W1,W2,Each power cell includes 4 insulated gate bipolar transistor VT1,VT2,VT3,VT4,The emitter of insulated gate bipolar transistor VT1 connects the collector of insulated gate bipolar transistor VT2,The emitter of insulated gate bipolar transistor VT2 connects the collector of insulated gate bipolar transistor VT3,The emitter of insulated gate bipolar transistor VT3 connects the collector of insulated gate bipolar transistor VT4,The present invention sets up power cell by the IGBT of voltage levels,Reduce the usage amount of high power device；It can be used for rectification and inversion link, it is versatile；Phase-shifting transformer is eliminated, equipment volume is further reduced costs and reduce.
Description
Technical field
The present invention relates to high-voltage frequency converter circuits, especially for the high voltage frequency converter of 6kV voltage class.
Background technology
Due to the significant characteristics of energy saving of frequency converter, it is made to be widely used in metallurgy, mine, thermal power plant.Currently, 6kV voltages
The high-voltage frequency converter of grade, main circuit structure is as shown in Figure 1, circuit topological structure is that primary voltage is defeated by phase-shifting transformer
After entering, it is directly output to each power cell.Power cell is the single-phase frequency converter of normal structure, and main circuit is as shown in Figure 2.This
Kind of high-voltage frequency converter be substantially by the single-phase frequency converter of low pressure after cascade, become three-phase high-voltage frequency converter.This structure
High-voltage frequency converter have output voltage it is high-quality, input harmonic current is low, it is easy to maintain the advantages that.But structure in this
There is also deficiencies for high-voltage frequency converter：The single-phase frequency converter cascade of low pressure compensates for the problem of power device voltage endurance capability deficiency, still
It is big that there is device volumes, and weight is big, can not achieve energy feedback and braking；The phase-shifting transformer of more vice-side windings is needed, is increased
Equipment cost is added.
The list that cascaded high-voltage frequency converter mostly uses input three-phase bridge diode rectification at present, single-phase H bridges inversion exports
Meta structure.By taking each power cell exports 690V as an example, per 5 power unit cascades are mutually used, totally 15 power cells just may be used
To form the high-voltage frequency converter of a 6kV；Power cell uses the insulated gate bipolar transistor (IGBT) of 1200V, needs three
15, commutating phase bridge, IGBT quantity are 90 or 180 (H-bridge inverter circuit uses IGBT parallel ways)；Corresponding phase shift becomes
Depressor pair side three-phase windings are also required to 15.It is bulky, component is numerous, not only increase economic cost, and increase
Failure rate.Therefore, it is imperative to improve and innovate.
Invention content
For the above situation, to overcome the defect of the prior art, the purpose of the present invention to be just to provide a kind of small, first device
The high voltage frequency converter that few, the versatile power cell of number of packages amount forms.
The technical solution that the present invention solves is, a kind of high voltage frequency converter of power cell composition, including shell and is mounted in
High-pressure frequency-conversion circuit in shell, high-pressure frequency-conversion circuit include rectification module, DC Module and inverter module, and rectification module includes
6 power cells A1, A2, B1, B2, C1, C2, DC Module include concatenated capacitance C1, C2, C3, C4 and concatenated resistance R1,
R2, R3, R4, inverter module include 6 power cells U1, U2, V1, V2, W1, W2, and each power cell includes 4 insulated gates
The emitter of bipolar transistor VT1, VT2, VT3, VT4, insulated gate bipolar transistor VT1 connect insulated gate bipolar transistor
The collector of VT2, the emitter of insulated gate bipolar transistor VT2 connect the collector of insulated gate bipolar transistor VT3, insulation
The emitter of grid bipolar transistor VT3 connects the collector of insulated gate bipolar transistor VT4；
In rectification module：
Power cell A1, A2 are in parallel, and power cell B1, B2 are in parallel, and power cell C1, C2 are in parallel, in each power cell：
DC voltage electrode output end of the collector of insulated gate bipolar transistor VT1 as rectification module power cell
P1；
The total end of insulated gate bipolar transistor VT2 and insulated gate bipolar transistor VT3 is as rectification module power list
The single phase input O1 of the three-phase alternating-current supply of member；
DC voltage cathode output end of the emitter of insulated gate bipolar transistor VT4 as rectification module power cell
N1；
In inverter module：
Power cell U1, U2 are in parallel, and power cell V1, V2 are in parallel, and power cell W1, W2 are in parallel, in each power cell：
DC voltage electrode input terminal of the collector of insulated gate bipolar transistor VT1 as inverter module power cell
P2；
The total end of insulated gate bipolar transistor VT2 and insulated gate bipolar transistor VT3 is as inverter module power list
The inversion AC single phase output end O2 of member；
DC voltage negative input of the emitter of insulated gate bipolar transistor VT4 as inverter module power cell
N2；
The DC voltage electrode output end of power cell A1 connects the direct current of each power cell of remaining in rectification module respectively
Press cathode output end, altogether in one end of termination capacitor C1, one end of resistance R1 and inverter module each power cell DC voltage
Electrode input end, the DC voltage cathode output end of power cell A1 connect the direct current of each power cell of remaining in rectification module respectively
Voltage cathode output end, altogether in one end of termination capacitor C4, one end of resistance R4 and inverter module each power cell direct current
Negative input, the other end of capacitance C1 is pressed to distinguish one end of one end and resistance R2 of the other end of connecting resistance R1, capacitance C2, electricity
Hold C2 the other end connect respectively one end of capacitance C3, the other end of resistance R2 and resistance R3 one end, the other end of capacitance C3 point
The other end of the other end and resistance R3 of the other end resistance R4 of capacitance C4 is not connect.
Circuit structure novel and unique of the present invention, advantages of simple is easy to produce, at low cost, small, passes through voltage levels
IGBT sets up power cell, reduces the usage amount of high power device；The power cell can be used for rectification and inversion link, general
Property is strong；High-voltage frequency converter circuit of the present invention, eliminates phase-shifting transformer, further reduces costs and reduce equipment volume,
And as a result of modular power cell, use is maintained easily and assembled, there is good practical value and economic benefit.
Description of the drawings
Fig. 1 is existing high-voltage frequency converter main circuit structure.
Fig. 2 is existing high voltage transducer power unit electrical block diagram.
Fig. 3 is rectification module power cell circuit topology figure of the present invention.
Fig. 4 is rectification module power cell simple equivalent circuit figure of the present invention.
Fig. 5 is inverter module power cell circuit topology figure of the present invention.
Fig. 6 is inverter module power cell simple equivalent circuit figure of the present invention.
Fig. 7 is the circuit topological structure schematic diagram of high voltage frequency converter of the present invention.
Fig. 8 is the shell structure schematic diagram of the present invention.
Specific implementation mode
The specific implementation mode of the present invention is described in further detail below in conjunction with attached drawing.
It is provided by Fig. 1-8, the present invention includes shell 1 and the high-pressure frequency-conversion circuit in shell, high-pressure frequency-conversion circuit packet
Rectification module, DC Module and inverter module are included, rectification module includes 6 power cells A1, A2, B1, B2, C1, C2, direct current mould
Block includes concatenated capacitance C1, C2, C3, C4 and concatenated resistance R1, R2, R3, R4, inverter module include 6 power cell U1,
U2, V1, V2, W1, W2, each power cell include 4 insulated gate bipolar transistors VT1, VT2, VT3, VT4, insulated gate
The emitter of bipolar transistor VT1 meets the collector of insulated gate bipolar transistor VT2, insulated gate bipolar transistor VT2
Emitter connect the collector of insulated gate bipolar transistor VT3, the emitter of insulated gate bipolar transistor VT3 connects insulated gate
The collector of bipolar transistor VT4；
In rectification module：
Power cell A1, A2 are in parallel, and power cell B1, B2 are in parallel, and power cell C1, C2 are in parallel, in each power cell：
DC voltage electrode output end of the collector of insulated gate bipolar transistor VT1 as rectification module power cell
P1；
The total end of insulated gate bipolar transistor VT2 and insulated gate bipolar transistor VT3 is as rectification module power list
The single phase input O1 of the three-phase alternating-current supply of member；
DC voltage cathode output end of the emitter of insulated gate bipolar transistor VT4 as rectification module power cell
N1；
In inverter module：
Power cell U1, U2 are in parallel, and power cell V1, V2 are in parallel, and power cell W1, W2 are in parallel, in each power cell：
DC voltage electrode input terminal of the collector of insulated gate bipolar transistor VT1 as inverter module power cell
P2；
The total end of insulated gate bipolar transistor VT2 and insulated gate bipolar transistor VT3 is as inverter module power list
The inversion AC single phase output end O2 of member；
DC voltage negative input of the emitter of insulated gate bipolar transistor VT4 as inverter module power cell
N2；
The DC voltage electrode output end of power cell A1 connects the direct current of each power cell of remaining in rectification module respectively
Press cathode output end, altogether in one end of termination capacitor C1, one end of resistance R1 and inverter module each power cell DC voltage
Electrode input end, the DC voltage cathode output end of power cell A1 connect the direct current of each power cell of remaining in rectification module respectively
Voltage cathode output end, altogether in one end of termination capacitor C4, one end of resistance R4 and inverter module each power cell direct current
Negative input, the other end of capacitance C1 is pressed to distinguish one end of one end and resistance R2 of the other end of connecting resistance R1, capacitance C2, electricity
Hold C2 the other end connect respectively one end of capacitance C3, the other end of resistance R2 and resistance R3 one end, the other end of capacitance C3 point
The other end of the other end and resistance R3 of the other end resistance R4 of capacitance C4 is not connect.
To ensure that using effect, the A phases that the single phase input of described power cell A1, A2 connects three-phase alternating-current supply respectively are defeated
The single phase input of outlet, power cell B1, B2 connects the B phase output terminals of three-phase alternating-current supply, the list of power cell C1, C2 respectively
Phase input terminal connects the C phase output terminals of three-phase alternating-current supply respectively；The inversion AC single phase output end of described power cell U1, U2 point
The U phase input terminals of the three-phase alternating-current supply of motor are not connect, and the inversion AC single phase output end of power cell V1, V2 connect electricity respectively
The inversion AC single phase output end of the V phase input terminals of the three-phase alternating-current supply of motivation, power cell W1, W2 connects motor respectively
The W phase input terminals of three-phase alternating-current supply.
3 AC powers corresponding with the single phase input of three-phase alternating-current supply are respectively arranged on the shell 1
Input port 2 and 3 ac power outputs corresponding with inversion AC single phase output end 3；Power cell A1, A2's is single-phase
Input terminal connects one of ac power input end mouth, second alternating current of single phase input point of power cell B1, B2 respectively
The single phase input of source input port, power cell C1, C2 distinguishes third ac power input end mouth, high voltage frequency converter point
It is not connected with 3 phases of three-phase alternating-current supply by three ac power input end mouths；The inversion exchange of power cell U1, U2 are single
Phase output terminal connects first ac power output, the inversion AC single phase output end difference second of power cell V1, V2 respectively
The inversion AC single phase output end of a ac power output, power cell W1, W2 distinguishes third ac power output, high
Converter plant is pressed to be connected respectively by the input terminal of the three-phase alternating-current supply of three ac power output motor.
As shown in figs. 3 and 5, insulated gate bipolar transistor VT1~VT4 is the IGBT of high voltage (6500V) grade,
It connects and forms power cell, which can be used as the use of rectification link, can also be used in inversion link.When the power
Unit is in rectification link in use, single-phase, the direct current of the single phase input O1 connection three-phase alternating-current supplies of three-phase alternating-current supply
It is the DC voltage electrode of rectification output to press cathode output end P1, and DC voltage cathode output end N1 is the direct current of rectification output
Press cathode；When the power cell in inversion link in use, the anode of DC voltage electrode input terminal P2 input direct-current voltages, directly
Galvanic electricity presses the cathode of negative input N2 input direct-current voltages, inversion AC single phase output end O2 to connect the three-phase alternating current of motor
Source it is single-phase.
By A1, A2, B1, B2, C1, C2, totally 6 power cells form rectification link (rectification module).Wherein power cell
A1, A2 are in parallel, and input terminal connects the A phases of three-phase alternating-current supply, and output end connects DC Module, forms single-phase semi-bridge rectified current
Road, the purpose of power cell A1, A2 parallel connection are to increase current margins；Wherein power cell B1, B2 is in parallel, and input terminal connects three-phase
The B phases of AC power, output end connect DC link, form single-phase semi-bridge rectification circuit；Wherein power cell C1, C2 is in parallel,
Input terminal connects the C phases of three-phase alternating-current supply, and output end connects DC Module, forms single-phase semi-bridge rectification circuit.Power cell
Totally 6 power cells constitute the controllable full bridge rectifier of three-phase by A1, A2, B1, B2, C1, C2.
DC link (DC Module) is made of thin-film capacitor and divider resistance, and specific connection type is：Thin-film capacitor C1
In parallel with divider resistance R1, thin-film capacitor C2 is in parallel with divider resistance R2, and thin-film capacitor C3 is in parallel with divider resistance R3, thin-film electro
Appearance C4 is in parallel with divider resistance R4, and above four part is connected again, is connected to high-voltage frequency converter DC link.
By U1, U2, V1, V2, W1, W2, totally 6 power cells form inversion link (inverter module).Wherein power cell
U1, U2 are in parallel, and input terminal connects DC Module, and output end is exchanged as frequency converter and exported, and constitutes single-phase semi-bridge inversion circuit,
The purpose of U1, U2 parallel connection is to increase current margins；Wherein power cell V1, V2 is in parallel, and input terminal connects DC Module, output end
It exchanges and exports as frequency converter, constitute single-phase semi-bridge inversion circuit, the purpose of V1, V2 parallel connection is to increase current margins；Wherein
Power cell W1, W2 are in parallel, and input terminal connects DC Module, and output end is exchanged as frequency converter and exported, and constitutes single-phase semi-bridge
Inverter circuit, the purpose of W1, W2 parallel connection are to increase current margins.
The present invention working condition and operation principle be：As shown in fig. 7, the input terminal of the high-voltage frequency converter of the present invention, directly
It connects and is connected with 6kV power supplys, eliminate phase-shifting transformer present in conventional high-tension frequency converter.High-voltage frequency converter is in working condition
Under, the rectified module of alternating current of 6kV, 50Hz of input terminal are become direct current；Filter again through frequency converter intermediate dc module
Wave becomes stable DC；Direct current, is become amplitude, frequency adjustable three by the most inverter module through high-voltage frequency converter afterwards
Phase alternating current supplies motor.
Rectification module power cell circuit topology is as shown in figure 3, inverter module power cell circuit topology is as shown in Figure 5.
As can be seen from the figure the composition of two kinds of circuits is completely the same, when as rectification module in use, terminal O1 connection three-phase alternating currents
One phase of input terminal, terminals P 1, N1 are separately connected the anode and cathode of rectification circuit；When as inverter module in use, terminal
P2, N2 are separately connected the anode and cathode of rectification circuit, a phase of terminal O2 connection three-phase alternating current output ends.Therefore, in this hair
Power cell in bright high-voltage frequency converter can be used in rectification and the inversion mould of high-voltage frequency converter by changing connection type
In block, modularized production is versatile.
In the high-voltage frequency converter of the present invention, 6 power cells A1, A2, B1, B2, C1, C2 constitute three-phase fully-controlled rectification
Circuit, 6 power cells U1, U2, V1, V2, W1, W2 constitute three-phase fully-controlled inverter circuit.The high-voltage frequency converter of the present invention, energy
Enough realize the two-way flow of energy, can four quadrant running can be effective simultaneously because use the rectification of full-control type, inversion
Inhibition harmonic wave, hoisting power factor.
Conventional high-tension frequency converter is made of phase-shifting transformer, 15 power cells, each power cell by a three-phase not
Inverter circuit, 8~12 electrolytic capacitor structures of controllable diode rectifier bridge, 2 divider resistances, a IGBT compositions in 4 (or 8)
At.Therefore, traditional high-voltage frequency converter main components number is：1 phase-shifting transformer, 15 rectifier bridges, 30 partial pressure electricity
Resistance, a IGBT in 60 (or 120), 120~180 electrolytic capacitors, 30 divider resistances are constituted.
It is compared with conventional high-tension frequency converter, high-voltage frequency converter of the invention has mainly and has 12 power cells, 4 thin-film electros
Hold, 4 divider resistance compositions, each power cell is made of 4 IGBT.Therefore, the main first device of high-voltage frequency converter of the invention
Part number is：48 IGBT, 4 thin-film capacitors, 4 divider resistances.
In conclusion should be apparent that circuit structure novel and unique of the present invention, advantages of simple is easy to produce, at low cost,
It is small, power cell is set up by the IGBT of voltage levels, reduces the usage amount of high power device；The power cell can
It is versatile for rectification and inversion link；Can four quadrant running, it can be achieved that energy two-way flow；Can effectively it press down
Harmonic wave processed, hoisting power factor；High-voltage frequency converter circuit of the present invention, eliminates phase-shifting transformer, further reduce costs and
Reduce equipment volume, and as a result of modular power cell, maintain easily and assemble use, there is good practicality
Value and economic benefit.
Claims (4)
1. a kind of high voltage frequency converter of power cell composition, including shell (1) and the high-pressure frequency-conversion circuit in shell,
It is characterized in that, high-pressure frequency-conversion circuit includes rectification module, DC Module and inverter module, and rectification module includes 6 power cells
A1, A2, B1, B2, C1, C2, DC Module include concatenated capacitance C1, C2, C3, C4 and concatenated resistance R1, R2, R3, R4, inverse
It includes 6 power cells U1, U2, V1, V2, W1, W2 to become module, and each power cell includes 4 insulated gate bipolar crystal
Pipe VT1, VT2, VT3, VT4, the emitter of insulated gate bipolar transistor VT1 connect the current collection of insulated gate bipolar transistor VT2
Pole, the emitter of insulated gate bipolar transistor VT2 connect the collector of insulated gate bipolar transistor VT3, insulated gate bipolar
The emitter of transistor VT3 connects the collector of insulated gate bipolar transistor VT4；
In rectification module：
Power cell A1, A2 are in parallel, and power cell B1, B2 are in parallel, and power cell C1, C2 are in parallel, in each power cell：
DC voltage electrode output end P1 of the collector of insulated gate bipolar transistor VT1 as rectification module power cell；
The total end of insulated gate bipolar transistor VT2 and insulated gate bipolar transistor VT3 is as rectification module power cell
The single phase input O1 of three-phase alternating-current supply；
DC voltage cathode output end N1 of the emitter of insulated gate bipolar transistor VT4 as rectification module power cell；
In inverter module：
Power cell U1, U2 are in parallel, and power cell V1, V2 are in parallel, and power cell W1, W2 are in parallel, in each power cell：
DC voltage electrode input terminal P2 of the collector of insulated gate bipolar transistor VT1 as inverter module power cell；
The total end of insulated gate bipolar transistor VT2 and insulated gate bipolar transistor VT3 is as inverter module power cell
Inversion AC single phase output end O2；
DC voltage negative input N2 of the emitter of insulated gate bipolar transistor VT4 as inverter module power cell；
The DC voltage electrode output end of power cell A1 connects the direct current positive pressure of each power cell of remaining in rectification module respectively
Pole output end, altogether in one end of termination capacitor C1, one end of resistance R1 and inverter module each power cell DC voltage electrode
Input terminal, the DC voltage cathode output end of power cell A1 connect the DC voltage of each power cell of remaining in rectification module respectively
Cathode output end, the DC voltage of each power cell is negative in one end of termination capacitor C4, one end of resistance R4 and inverter module altogether
Pole input terminal, the other end of capacitance C1 distinguish one end of one end and resistance R2 of the other end of connecting resistance R1, capacitance C2, capacitance C2
The other end connect respectively one end of capacitance C3, the other end of resistance R2 and resistance R3 one end, the other end of capacitance C3 connects respectively
The other end of the other end and resistance R3 of the other end resistance R4 of capacitance C4.
2. the high voltage frequency converter of power cell composition according to claim 1, which is characterized in that the power cell
The single phase input of A1, A2 connect the A phase output terminals of three-phase alternating-current supply, the single phase input difference of power cell B1, B2 respectively
Connect the B phase output terminals of three-phase alternating-current supply, the C phases that the single phase input of power cell C1, C2 connects three-phase alternating-current supply respectively are defeated
Outlet.
3. the high voltage frequency converter of power cell composition according to claim 1, which is characterized in that the power cell
The inversion AC single phase output end of U1, U2 meet the U phase input terminals of the three-phase alternating-current supply of motor, power cell V1, V2 respectively
Inversion AC single phase output end connect respectively motor three-phase alternating-current supply V phase input terminals, the inversion of power cell W1, W2
AC single phase output end connects the W phase input terminals of the three-phase alternating-current supply of motor respectively.
4. the high voltage frequency converter of power cell composition according to claim 1, which is characterized in that the shell (1)
On be respectively arranged with 3 ac power input end mouths (2) corresponding with the single phase input of three-phase alternating-current supply and 3 with it is inverse
Become the corresponding ac power output of AC single phase output end (3).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022021347A1 (en) * | 2020-07-31 | 2022-02-03 | 华为数字能源技术有限公司 | Solid-state transformer and power supply system |
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