CN208257670U - A kind of high voltage frequency converter of power cell composition - Google Patents
A kind of high voltage frequency converter of power cell composition Download PDFInfo
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- CN208257670U CN208257670U CN201820980604.0U CN201820980604U CN208257670U CN 208257670 U CN208257670 U CN 208257670U CN 201820980604 U CN201820980604 U CN 201820980604U CN 208257670 U CN208257670 U CN 208257670U
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- power cell
- insulated gate
- gate bipolar
- bipolar transistor
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Abstract
The utility model 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 capacitor 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 insulated gate bipolar crystal The collector of pipe VT4, the utility model set 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 reduced costs and reduce.
Description
Technical field
The utility model relates to high-voltage frequency converter circuits, especially for the high voltage frequency converter of 6kV voltage class.
Background technique
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 voltage
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 cascading, 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.
Cascaded high-voltage frequency converter mostly uses the list of input three-phase bridge diode rectification, single-phase H bridge inversion output at present
Meta structure.By taking each power cell exports 690V as an example, every phase uses 5 power unit cascades, and 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 is 90 or 180 (H-bridge inverter circuit uses IGBT parallel way)；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.
Utility model content
For above situation, for the defect for overcoming the prior art, the purpose of the utility model be just to provide it is a kind of it is small in size,
The high voltage frequency converter that few, the versatile power cell of component number forms.
The technical solution that the utility model solves is a kind of high voltage frequency converter of power cell composition, including shell and
Mounted in the intracorporal high-pressure frequency-conversion circuit of shell, high-pressure frequency-conversion circuit includes rectification module, DC Module and inverter module, rectification module
Including 6 power cells A1, A2, B1, B2, C1, C2, DC Module includes concatenated capacitor C1, C2, C3, C4 and concatenated electricity
R1, R2, R3, R4 are hindered, inverter module includes 6 power cells U1, U2, V1, V2, W1, W2, and each power cell includes 4
The emitter of insulated gate bipolar transistor VT1, VT2, VT3, VT4, insulated gate bipolar transistor VT1 connect insulated gate bipolar
The collector of transistor VT2, the emitter of insulated gate bipolar transistor VT2 connect the current collection of insulated gate bipolar transistor VT3
Pole, the emitter of insulated gate bipolar transistor VT3 connect 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
Cathode output end is pressed, the DC voltage of each power cell in one end of total termination capacitor C1, one end of resistance R1 and inverter module
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
Press negative input, the other end, one end of capacitor C2 and one end of resistance R2 of the other end difference connecting resistance R1 of capacitor C1, electricity
The other end for holding C2 connects one end of one end of capacitor C3, the other end of resistance R2 and resistance R3, the other end point of capacitor C3 respectively
The other end of the other end resistance R4 of capacitor C4 and the other end of resistance R3 are not connect.
The utility model circuit structure novel and unique, advantages of simple is easy to produce, at low cost, small in size, passes through high voltage etc.
The IGBT of grade sets up power cell, reduces the usage amount of high power device；The power cell can be used for rectifying and inversion link,
It is versatile；The utility model high-voltage frequency converter circuit, eliminates phase-shifting transformer, further reduces costs and reduces and sets
Standby volume, and due to using modular power cell, use is maintained easily and assembled, there is good practical value and warp
Ji benefit.
Detailed description of the invention
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 the utility model rectification module power cell circuit topology figure.
Fig. 4 is the utility model rectification module power cell simple equivalent circuit figure.
Fig. 5 is the utility model inverter module power cell circuit topology figure.
Fig. 6 is the utility model inverter module power cell simple equivalent circuit figure.
Fig. 7 is the circuit topological structure schematic diagram of the utility model high voltage frequency converter.
Fig. 8 is the schematic diagram of housing structure of the utility model.
Specific embodiment
Specific embodiment of the present utility model is described in further detail below in conjunction with attached drawing.
It is provided by Fig. 1-8, the utility model includes shell 1 and is mounted in the intracorporal high-pressure frequency-conversion circuit of shell, and high-pressure frequency-conversion is electric
Road includes rectification module, DC Module and inverter module, and rectification module includes 6 power cells A1, A2, B1, B2, C1, C2, directly
Flow module includes concatenated capacitor C1, C2, C3, C4 and concatenated resistance R1, R2, R3, R4, and inverter module includes 6 power lists
First U1, U2, V1, V2, W1, W2, each power cell include 4 insulated gate bipolar transistors VT1, VT2, VT3, VT4, absolutely
The emitter of edge grid bipolar junction transistor VT1 connects the collector of insulated gate bipolar transistor VT2, insulated gate bipolar transistor
The emitter of VT2 connects the collector of insulated gate bipolar transistor VT3, and the emitter of insulated gate bipolar transistor VT3 connects absolutely
The collector of edge grid bipolar junction 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
Cathode output end is pressed, the DC voltage of each power cell in one end of total termination capacitor C1, one end of resistance R1 and inverter module
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
Press negative input, the other end, one end of capacitor C2 and one end of resistance R2 of the other end difference connecting resistance R1 of capacitor C1, electricity
The other end for holding C2 connects one end of one end of capacitor C3, the other end of resistance R2 and resistance R3, the other end point of capacitor C3 respectively
The other end of the other end resistance R4 of capacitor C4 and the other end of resistance R3 are not connect.
To guarantee that using effect, the A phase that the single phase input of described power cell A1, A2 connect three-phase alternating-current supply respectively are defeated
Outlet, the single phase input of power cell B1, B2 connect the B phase output terminal of three-phase alternating-current supply, the list of power cell C1, C2 respectively
Phase input terminal connects the C phase output terminal 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 terminal of the three-phase alternating-current supply of motor is 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 terminal of the three-phase alternating-current supply of motivation, power cell W1, W2 connects motor respectively
The W phase input terminal of three-phase alternating-current supply.
3 AC power sources 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 output 3 corresponding with inversion AC single phase output end；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
Source input port, the single phase input of power cell C1, C2 distinguish third ac power input end mouth, high voltage frequency converter point
Not Tong Guo three ac power input end mouths be connected with 3 phases of three-phase alternating-current supply；The inversion of power cell U1, U2 exchange single
Phase output terminal connects first ac power output, the inversion AC single phase output end difference second of power cell V1, V2 respectively
A ac power output, the inversion AC single phase output end of power cell W1, W2 distinguish third ac power output, high
The input terminal that pressure converter plant passes through the three-phase alternating-current supply of three ac power output motor respectively is connected.
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 rectification link and use, and can also use 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 supply of three-phase alternating-current supply
Pressure cathode output end P1 is the DC voltage electrode of rectification output, 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 voltage, directly
The cathode of voltage negative input end N2 input direct-current voltage is flowed, inversion AC single phase output end O2 connects the three-phase alternating current of motor
Source it is single-phase.
Rectifying link (rectification module), totally 6 power cells form by A1, A2, B1, B2, C1, C2.Wherein power cell
A1, A2 are in parallel, and input terminal connects the A phase of three-phase alternating-current supply, and output end connects DC Module, form 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 phase of AC power source, 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 phase 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, specific connection type are as follows: 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 constitute 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 constitute single-phase semi-bridge
Inverter circuit, the purpose of W1, W2 parallel connection are to increase current margins.
The working condition and working principle of the utility model are as follows: as shown in fig. 7, the high-voltage frequency converter of the utility model is defeated
Enter end, is directly connected with 6kV power supply, eliminates phase-shifting transformer present in conventional high-tension frequency converter.High-voltage frequency converter is in work
Make under state, the rectified module of alternating current of 6kV, 50Hz of input terminal are become direct current；Again through frequency converter intermediate dc mould
The filtering of block, becomes stable DC；Most afterwards through the inverter module of high-voltage frequency converter, direct current is become amplitude, frequency can
The three-phase alternating current of tune 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 current
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 end.Therefore, in this reality
With the power cell in novel high-pressure frequency, the rectification of high-voltage frequency converter and inverse by changing connection type, can be used in
Become in module, modularized production is versatile.
In the high-voltage frequency converter of the utility model, 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 pressure of the utility model
Frequency converter can be realized the two-way flow of energy, can four quadrant running, simultaneously because use full-control type rectification, inversion,
Harmonic wave, hoisting power factor can effectively be inhibited.
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 that controllable diode rectifier bridge, 2 divider resistances, a IGBT in 4 (or 8) are constituted
At.Therefore, traditional high-voltage frequency converter main components number are as follows: 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, the high-voltage frequency converter of the utility model has mainly and has 12 power cells, 4 thin
Membrane capacitance, 4 divider resistance compositions, each power cell are made of 4 IGBT.Therefore, the high-voltage frequency converter of the utility model
Main components number are as follows: 48 IGBT, 4 thin-film capacitors, 4 divider resistances.
In conclusion should be apparent that the utility model circuit structure novel and unique, advantages of simple is easy to produce, at
This is low, small in size, sets up power cell by the IGBT of voltage levels, reduces the usage amount of high power device；The power
Unit can be used for rectifying and inversion link, versatile；Can four quadrant running, it can be achieved that energy two-way flow；Can have
The inhibition harmonic wave of effect, hoisting power factor；The utility model high-voltage frequency converter circuit, eliminates phase-shifting transformer, further drops
Low cost and reduce equipment volume, and due to using modular power cell, maintains easily and assemble use, have
Good practical value and economic benefit.
Claims (4)
1. a kind of high voltage frequency converter of power cell composition, including shell (1) and it is mounted in the intracorporal high-pressure frequency-conversion circuit of 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 capacitor C1, C2, C3, C4 and concatenated resistance R1, R2, R3, R4, inverse
Becoming module includes 6 power cells U1, U2, V1, V2, W1, W2, 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, one end of capacitor C2 and one end of resistance R2 of the other end difference connecting resistance R1 of capacitor C1, capacitor C2
The other end connect one end of one end of capacitor C3, the other end of resistance R2 and resistance R3 respectively, the other end of capacitor C3 connects respectively
The other end of the other end resistance R4 of capacitor C4 and the other end of resistance R3.
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 terminal of three-phase alternating-current supply, the single phase input difference of power cell B1, B2 respectively
The B phase output terminal of three-phase alternating-current supply is connect, the C phase that the single phase input of power cell C1, C2 connect three-phase alternating-current supply respectively is 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 terminal 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 terminal, the inversion of power cell W1, W2
AC single phase output end connects the W phase input terminal 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 (3) of AC single phase output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820980604.0U CN208257670U (en) | 2018-06-25 | 2018-06-25 | A kind of high voltage frequency converter of power cell composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820980604.0U CN208257670U (en) | 2018-06-25 | 2018-06-25 | A kind of high voltage frequency converter of power cell composition |
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| Publication Number | Publication Date |
|---|---|
| CN208257670U true CN208257670U (en) | 2018-12-18 |
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ID=64653298
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820980604.0U Expired - Fee Related CN208257670U (en) | 2018-06-25 | 2018-06-25 | A kind of high voltage frequency converter of power cell composition |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108551267A (en) * | 2018-06-25 | 2018-09-18 | 中国大唐集团科学技术研究院有限公司华中分公司 | The high voltage frequency converter of power cell composition |
-
2018
- 2018-06-25 CN CN201820980604.0U patent/CN208257670U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108551267A (en) * | 2018-06-25 | 2018-09-18 | 中国大唐集团科学技术研究院有限公司华中分公司 | The high voltage frequency converter of power cell composition |
| CN108551267B (en) * | 2018-06-25 | 2024-03-08 | 中国大唐集团科学技术研究院有限公司华中分公司 | High-voltage frequency conversion device composed of power units |
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