CN202019306U - Pre-charge circuit and high-voltage frequency converter comprising same - Google Patents
Pre-charge circuit and high-voltage frequency converter comprising same Download PDFInfo
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- CN202019306U CN202019306U CN2011200735457U CN201120073545U CN202019306U CN 202019306 U CN202019306 U CN 202019306U CN 2011200735457 U CN2011200735457 U CN 2011200735457U CN 201120073545 U CN201120073545 U CN 201120073545U CN 202019306 U CN202019306 U CN 202019306U
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Abstract
The utility model discloses a pre-charge circuit and a high-voltage frequency converter comprising the same, and relates to the high-voltage frequency conversion field. The pre-charge circuit comprises six resistors R5, R10, R15, R4, R4, R9 and R14, and two AC contactors KM5 and KM4. The high-voltage frequency converter comprises the pre-charge circuit and a rectifier transformer, wherein the rectifier transformer comprises a primary winding, an auxiliary winding, a plurality of secondary windings, and a plurality of power units corresponding to the secondary windings; and compared with a conventional scheme, each power unit dispenses with a high-voltage relay and a power resistor. As provided with the pre-charge circuit, the high-voltage frequency converter has the advantages of less components, reduced size, declined power consumption and reduced cost.
Description
Technical field
The utility model relates to the high-pressure frequency-conversion field, particularly a kind of pre-charge circuit and comprise its high voltage converter.
Background technology
Along with the development of power electronic technology and going deep into of high voltage converter technical research, high voltage converter is applied in the drive system of high-power machinery equipment such as blower fan, water pump, compressor increasingly extensively, particularly cascaded high-voltage frequency converter is more and more favored as the frequency converter that is fit to China's actual conditions, excellent performance.
When this kind high voltage converter moves in each start, need set up DC bus-bar voltage earlier, because every phase voltage of cascaded high-voltage frequency converter is to be made of a plurality of power unit cascade outputs, and each separate unit also has many electric capacity, therefore whole system is when powering on, it is very necessary that huge input impulse current is suppressed, at this moment just need a kind of pre-charge circuit to reduce impulse current urgently, make its impact be reduced to reasonable range to electrical network and native system, thereby improve the reliability of system, also reduce interference electrical network.
Traditional pre-charge circuit constitutes by high-pressure type relay and power resistor are set in power cell.The volume of high-pressure type relay is big, cost is higher, and each high voltage converter can comprise a plurality of this power cells, and this just causes the component number of high voltage converter many, volume is big, power consumption is high, cost is high.
The utility model content
(1) technical problem that will solve
The technical problems to be solved in the utility model is: how a kind of pre-charge circuit is provided and comprises the high voltage converter of this pre-charge circuit.By adopting this kind pre-charge circuit, can reduce the component number of whole high voltage converter, reduce its volume, reduce power consumption, reduce cost.
(2) technical scheme
For solving the problems of the technologies described above, the utility model provides a kind of pre-charge circuit, and described pre-charge circuit (300) comprises 6 resistance R 5, R10, R15, R4, R9 and R14, and two A.C. contactor KM5 and KM4;
First end of described resistance R 5 connects first end of first normally opened contact of described A.C. contactor KM5 and first end of described resistance R 4, and second end of described resistance R 4 connects first end of first normally opened contact of second end of first normally opened contact of described A.C. contactor KM5 and described A.C. contactor KM4;
First end of described resistance R 10 connects first end of second normally opened contact of described A.C. contactor KM5 and first end of described resistance R 9, and second end of described resistance R 9 connects first end of second normally opened contact of second end of second normally opened contact of described A.C. contactor KM5 and described A.C. contactor KM4;
First end of described resistance R 15 connects first end of the 3rd normally opened contact of described A.C. contactor KM5 and first end of described resistance R 14, and second end of described resistance R 14 connects first end of the 3rd normally opened contact of second end of the 3rd normally opened contact of described A.C. contactor KM5 and described A.C. contactor KM4.
Preferably, described pre-charge circuit (300) also comprises 3 resistance R 3, R8, R13 and A.C. contactor KM3;
Second end of described resistance R 4 also connects first end of described resistance R 3, second end of described resistance R 3 connect second end of first normally opened contact of described A.C. contactor KM4 and described A.C. contactor KM3 first end of first normally opened contact;
Second end of described resistance R 9 also connects first end of described resistance R 8, second end of described resistance R 8 connect second end of second normally opened contact of described A.C. contactor KM4 and described A.C. contactor KM3 first end of second normally opened contact;
Second end of described resistance R 14 also connects first end of described resistance R 13, second end of described resistance R 13 connect second end of the 3rd normally opened contact of described A.C. contactor KM4 and described A.C. contactor KM3 first end of the 3rd normally opened contact.
Preferably, described pre-charge circuit (300) also comprises 3 resistance R 2, R7, R12 and A.C. contactor KM2;
Second end of described resistance R 3 also connects first end of described resistance R 2, second end of described resistance R 2 connect second end of first normally opened contact of described A.C. contactor KM3 and described A.C. contactor KM2 first end of first normally opened contact;
Second end of described resistance R 8 also connects first end of described resistance R 7, second end of described resistance R 7 connect second end of second normally opened contact of described A.C. contactor KM3 and described A.C. contactor KM2 first end of second normally opened contact;
Second end of described resistance R 13 also connects first end of described resistance R 12, second end of described resistance R 12 connect second end of the 3rd normally opened contact of described A.C. contactor KM3 and described A.C. contactor KM2 first end of the 3rd normally opened contact.
Preferably, described pre-charge circuit (300) also comprises 3 resistance R 1, R6, R11 and A.C. contactor KM1;
Second end of described resistance R 2 also connects first end of described resistance R 1, second end of described resistance R 1 connect second end of first normally opened contact of described A.C. contactor KM2 and described A.C. contactor KM1 first end of first normally opened contact;
Second end of described resistance R 7 also connects first end of described resistance R 6, second end of described resistance R 6 connect second end of second normally opened contact of described A.C. contactor KM2 and described A.C. contactor KM1 first end of second normally opened contact;
Second end of described resistance R 12 also connects first end of described resistance R 11, second end of described resistance R 11 connect second end of the 3rd normally opened contact of described A.C. contactor KM2 and described A.C. contactor KM1 first end of the 3rd normally opened contact.
Preferably, described pre-charge circuit (300) also comprises circuit breaker Q F, first end of first normally opened contact of described circuit breaker Q F connects second end of first normally opened contact of described A.C. contactor KM1, first end of second normally opened contact of described circuit breaker Q F connects second end of second normally opened contact of described A.C. contactor KM1, and first end of the 3rd normally opened contact of described circuit breaker Q F connects second end of the 3rd normally opened contact of described A.C. contactor KM1.
The utility model also provides a kind of high voltage converter that comprises described pre-charge circuit (300), and described high voltage converter also comprises rectifier transformer (100);
Described rectifier transformer (100) comprises former limit winding (101), auxiliary winding (103) and 3n secondary winding (102); N is more than or equal to 1;
Described high voltage converter also comprises the power cell (200) of 3n corresponding described secondary winding (102);
3 ends of described auxiliary winding (103) connect second end of described resistance R 5, R10 and R15 respectively;
Described power cell (200) comprises 3 input A, B, C, 10 diode D1～D10,1,4 insulated gate bipolar transistor T1～T4 of capacitor C, and two output X, Y;
Described input A connects first end of corresponding described secondary winding (102), and connects the anode of described diode D1 and the negative electrode of described diode D4;
Described input B connects second end of corresponding described secondary winding (102), and connects the anode of described diode D2 and the negative electrode of described diode D5;
Described input C connects the 3rd end of corresponding described secondary winding (102), and connects the anode of described diode D3 and the negative electrode of diode D6;
The negative electrode of described diode D1 connects the collector electrode of the negative electrode of the negative electrode of described diode D2, described diode D3, the positive pole of described capacitor C 1, the collector electrode of described insulated gate bipolar transistor T1, the negative electrode of described diode D7, described insulated gate bipolar transistor T2 and the negative electrode of described diode D8;
The anode of described diode D4 connects the emitter of the anode of the anode of described diode D5, described diode D6, the negative pole of described capacitor C 1, the emitter of described insulated gate bipolar transistor T3, the anode of described diode D9, described insulated gate bipolar transistor T4 and the anode of described diode D10;
The emitter of described insulated gate bipolar transistor T1 connects the anode of described diode D7, the collector electrode of described output Y, described insulated gate bipolar transistor T3 and the negative electrode of described diode D9;
The emitter of described insulated gate bipolar transistor T2 connects the anode of described diode D8, the collector electrode of described output X, described insulated gate bipolar transistor T4 and the negative electrode of described diode D10;
The base stage of the base stage of the base stage of described insulated gate bipolar transistor T1, described insulated gate bipolar transistor T2, described insulated gate bipolar transistor T3 is connected drive plate with the base stage of described insulated gate bipolar transistor T4;
A described 3n power cell is divided into 3 power cell groups, the output X of first power cell connects the output Y of second power cell in each power cell group, the output X of second power cell connects the output Y of the 3rd power cell, and the like, the output X of n-1 power cell connects the output Y of n power cell.
Preferably, described n is 5 or 8.
(3) beneficial effect
High voltage converter of the present utility model has reduced the component number of whole high voltage converter by adopting described pre-charge circuit, has reduced its volume, has reduced power consumption, has reduced cost.
Description of drawings
Fig. 1 comprises the high voltage converter of the described pre-charge circuit of the utility model embodiment and the johning knot composition of motor;
Fig. 2 is the circuit structure diagram of power cell in the conventional high-tension frequency converter;
Fig. 3 is the circuit structure diagram of power cell in the described high voltage converter of the utility model embodiment.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples are used to illustrate the utility model, but are not used for limiting scope of the present utility model.
Fig. 1 comprises the high voltage converter of the described pre-charge circuit of the utility model embodiment and the johning knot composition of motor.As shown in Figure 1, comprise the high voltage converter of the described pre-charge circuit of the utility model embodiment (300), also comprise rectifier transformer 100, described rectifier transformer 100 comprises former limit winding 101, auxiliary winding 103 and 15 secondary windings 102.
Described high voltage converter also comprises the power cell 200 of 15 described secondary windings 102 of correspondence.
Described pre-charge circuit 300 comprises 15 resistance R 1～R15,5 A.C. contactor KM1～KM5 and circuit breaker Q F.In precharge process, if occur overcurrent in the circuit, but described circuit breaker Q F tripping guarantees that components and parts are not burnt.
First end of described auxiliary winding 103 connects first end of described resistance R 5; Second end of described resistance R 5 connects first end of first normally opened contact of described A.C. contactor KM5 and first end of described resistance R 4; Second end of described resistance R 4 connects first end of first normally opened contact of second end of first normally opened contact of described A.C. contactor KM5, described A.C. contactor KM4 and first end of described resistance R 3; Second end of described resistance R 3 connects first end of first normally opened contact of second end of first normally opened contact of described A.C. contactor KM4, described A.C. contactor KM3 and first end of described resistance R 2; Second end of described resistance R 2 connects first end of first normally opened contact of second end of first normally opened contact of described A.C. contactor KM3, described A.C. contactor KM2 and first end of described resistance R 1; Second end of described resistance R 1 connects first end of first normally opened contact of second end of first normally opened contact of described A.C. contactor KM2 and described A.C. contactor KM1; Second end of first normally opened contact of described A.C. contactor KM1 connects first end of first normally opened contact of described circuit breaker Q F.
Second end of described auxiliary winding 103 connects first end of described resistance R 10; Second end of described resistance R 10 connects first end of second normally opened contact of described A.C. contactor KM5 and first end of described resistance R 9; Second end of described resistance R 9 connects first end of second normally opened contact of second end of second normally opened contact of described A.C. contactor KM5, described A.C. contactor KM4 and first end of described resistance R 8; Second end of described resistance R 8 connects first end of second normally opened contact of second end of second normally opened contact of described A.C. contactor KM4, described A.C. contactor KM3 and first end of described resistance R 7; Second end of described resistance R 7 connects first end of second normally opened contact of second end of second normally opened contact of described A.C. contactor KM3, described A.C. contactor KM2 and first end of described resistance R 6; Second end of described resistance R 6 connects first end of second normally opened contact of second end of second normally opened contact of described A.C. contactor KM2 and described A.C. contactor KM1; Second end of second normally opened contact of described A.C. contactor KM1 connects first end of second normally opened contact of described circuit breaker Q F.
The 3rd end of described auxiliary winding 103 connects first end of described resistance R 15; Second end of described resistance R 15 connects first end of the 3rd normally opened contact of described A.C. contactor KM5 and first end of described resistance R 14; Second end of described resistance R 14 connects first end of the 3rd normally opened contact of second end of the 3rd normally opened contact of described A.C. contactor KM5, described A.C. contactor KM4 and first end of described resistance R 13; Second end of described resistance R 13 connects first end of the 3rd normally opened contact of second end of the 3rd normally opened contact of described A.C. contactor KM4, described A.C. contactor KM3 and first end of described resistance R 12; Second end of described resistance R 12 connects first end of the 3rd normally opened contact of second end of the 3rd normally opened contact of described A.C. contactor KM3, described A.C. contactor KM2 and first end of described resistance R 11; Second end of described resistance R 11 connects first end of the 3rd normally opened contact of second end of the 3rd normally opened contact of described A.C. contactor KM2 and described A.C. contactor KM1; Second end of the 3rd normally opened contact of described A.C. contactor KM1 connects first end of the 3rd normally opened contact of described circuit breaker Q F.
Resistance R 1, R6, R11 and A.C. contactor KM1 constitute a precharge unit; In like manner, resistance R 2, R7, R12 and A.C. contactor KM2 constitute a precharge unit, resistance R 3, R8, R13 and A.C. contactor KM3 constitute a precharge unit, resistance R 4, R9, R14 and A.C. contactor KM4 constitute a precharge unit, and resistance R 5, R10, R15 and A.C. contactor KM5 constitute a precharge unit.The described pre-charge circuit 300 of present embodiment comprises 5 described precharge unit, also can suitably adjust the quantity of described precharge unit according to different operating positions, generally speaking, 2 to 5 such precharge unit can be set in the pre-charge circuit.
Second end of three normally opened contacts of described circuit breaker Q F connects the three-phase alternating current low-tension supply of 380V.
Fig. 3 is the circuit structure diagram of power cell in the described high voltage converter of the utility model embodiment.As shown in Figure 3, described power cell 200 comprises 3 input A, B, C, 10 diode D1～D10,1,4 insulated gate bipolar transistor T1～T4 of capacitor C, and two output X, Y.
Described input A connects first end of corresponding described secondary winding 102, and connects the anode of described diode D1 and the negative electrode of described diode D4.
Described input B connects second end of corresponding described secondary winding 102, and connects the anode of described diode D2 and the negative electrode of described diode D5.
Described input C connects the 3rd end of corresponding described secondary winding 102, and connects the anode of described diode D3 and the negative electrode of diode D6.
The negative electrode of described diode D1 connects the collector electrode of the negative electrode of the negative electrode of described diode D2, described diode D3, the positive pole of described capacitor C 1, the collector electrode of described insulated gate bipolar transistor T1, the negative electrode of described diode D7, described insulated gate bipolar transistor T2 and the negative electrode of described diode D8.
The anode of described diode D4 connects the emitter of the anode of the anode of described diode D5, described diode D6, the negative pole of described capacitor C 1, the emitter of described insulated gate bipolar transistor T3, the anode of described diode D9, described insulated gate bipolar transistor T4 and the anode of described diode D10.
The emitter of described insulated gate bipolar transistor T1 connects the anode of described diode D7, the collector electrode of described output Y, described insulated gate bipolar transistor T3 and the negative electrode of described diode D9.
The emitter of described insulated gate bipolar transistor T2 connects the anode of described diode D8, the collector electrode of described output X, described insulated gate bipolar transistor T4 and the negative electrode of described diode D10.
The base stage of the base stage of the base stage of described insulated gate bipolar transistor T1, described insulated gate bipolar transistor T2, described insulated gate bipolar transistor T3 is connected drive plate with the base stage of described insulated gate bipolar transistor T4.
Fig. 2 is the circuit structure diagram of power cell in the conventional high-tension frequency converter.Comparison diagram 2 and Fig. 3 as can be seen in the more traditional voltage frequency changer of the described power cell of the utility model embodiment 200 power cell reduced the local circuit that dotted line enclosed 500.Described local circuit 500 comprises what high-pressure type relay K A and power resistor R constituted.The volume of high-pressure type relay is big, cost is higher, and because each high voltage converter can comprise a plurality of power cells, this just causes the component number of high voltage converter many, volume is big, power consumption is high, cost is high.The described power cell 200 of the utility model embodiment has saved this local circuit 500, can effectively reduce the component number of high voltage converter, reduces its volume, reduces its power consumption and cost.
Described 15 power cells 200 are divided into 3 power cell groups, the output X of first power cell 200 connects the output Y of second power cell 200 in each power cell group, the output X of second power cell 200 connects the output Y of the 3rd power cell 200, and the like, the output X of the 4th power cell 200 connects the output Y of the 5th power cell 200.Accordingly, this moment, secondary winding 102 quantity also amounted to 15, and corresponding was divided into 3 groups, on the same group the power supply phase place difference of Nei secondary winding 102.The output Y of the 1st power cell is the output Y of this power cell group in the power cell group, and the output X of the 5th power cell is the output X of this power cell group.The output Y of 3 power cell groups is connected to each other, and the output X of 3 power cell groups connects motor 400 respectively.
Described power cell 200 also can be provided with 24, is divided into 3 power cell groups, 8 every group.The annexation of each power cell 200 in the power cell group, and the annexation between different capacity unit group is similar to the described annexation of present embodiment.Accordingly, this moment, secondary winding 102 quantity also amounted to 24, and corresponding was divided into 3 groups, on the same group the power supply phase place difference of Nei secondary winding 102.
The described high voltage converter course of work of the utility model embodiment is as follows: high voltage converter is before the preparation high pressure powers on, and circuit breaker Q F and A.C. contactor KM1～KM5 all are in off-state; When high voltage converter preparation high pressure powered on, close circuit breaker QF was according to Preset Time and order, closed A.C. contactor KM1, KM2, KM3, KM4 and KM5, institute's series resistance value is reduced gradually, and electric current strengthens gradually on the circuit, is power cell 200 chargings; When the direct voltage that detects power cell 200 reached certain value, precharge finished; Closed make high voltage converter insert high voltage source, finish high voltage converter high pressure power up for high voltage converter provides the primary cut-out of high voltage source.
The described high voltage converter of the utility model embodiment has saved in the conventional high-tension frequency converter local circuit 500 of each power cell part, concentrates to set up pre-charge circuit 300 and be connected with auxiliary winding 103.Thereby, reduced the number of elements of high voltage converter on the whole, reduced its volume, reduced its power consumption and cost.And, look operating position and can suitably reduce precharge unit quantity in the pre-charge circuit 300, with the number of elements of further minimizing high voltage converter, reduce its volume, reduce its power consumption and cost.
Above execution mode only is used to illustrate the utility model; and be not to restriction of the present utility model; the those of ordinary skill in relevant technologies field; under the situation that does not break away from spirit and scope of the present utility model; can also make various variations and modification; therefore all technical schemes that are equal to also belong to category of the present utility model, and scope of patent protection of the present utility model should be defined by the claims.
Claims (7)
1. a pre-charge circuit is characterized in that, described pre-charge circuit (300) comprises 6 resistance R 5, R10, R15, R4, R9 and R14, and two A.C. contactor KM5 and KM4;
First end of described resistance R 5 connects first end of first normally opened contact of described A.C. contactor KM5 and first end of described resistance R 4, and second end of described resistance R 4 connects first end of first normally opened contact of second end of first normally opened contact of described A.C. contactor KM5 and described A.C. contactor KM4;
First end of described resistance R 10 connects first end of second normally opened contact of described A.C. contactor KM5 and first end of described resistance R 9, and second end of described resistance R 9 connects first end of second normally opened contact of second end of second normally opened contact of described A.C. contactor KM5 and described A.C. contactor KM4;
First end of described resistance R 15 connects first end of the 3rd normally opened contact of described A.C. contactor KM5 and first end of described resistance R 14, and second end of described resistance R 14 connects first end of the 3rd normally opened contact of second end of the 3rd normally opened contact of described A.C. contactor KM5 and described A.C. contactor KM4.
2. pre-charge circuit as claimed in claim 1 is characterized in that, described pre-charge circuit (300) also comprises 3 resistance R 3, R8, R13 and A.C. contactor KM3;
Second end of described resistance R 4 also connects first end of described resistance R 3, second end of described resistance R 3 connect second end of first normally opened contact of described A.C. contactor KM4 and described A.C. contactor KM3 first end of first normally opened contact;
Second end of described resistance R 9 also connects first end of described resistance R 8, second end of described resistance R 8 connect second end of second normally opened contact of described A.C. contactor KM4 and described A.C. contactor KM3 first end of second normally opened contact;
Second end of described resistance R 14 also connects first end of described resistance R 13, second end of described resistance R 13 connect second end of the 3rd normally opened contact of described A.C. contactor KM4 and described A.C. contactor KM3 first end of the 3rd normally opened contact.
3. pre-charge circuit as claimed in claim 2 is characterized in that, described pre-charge circuit (300) also comprises 3 resistance R 2, R7, R12 and A.C. contactor KM2;
Second end of described resistance R 3 also connects first end of described resistance R 2, second end of described resistance R 2 connect second end of first normally opened contact of described A.C. contactor KM3 and described A.C. contactor KM2 first end of first normally opened contact;
Second end of described resistance R 8 also connects first end of described resistance R 7, second end of described resistance R 7 connect second end of second normally opened contact of described A.C. contactor KM3 and described A.C. contactor KM2 first end of second normally opened contact;
Second end of described resistance R 13 also connects first end of described resistance R 12, second end of described resistance R 12 connect second end of the 3rd normally opened contact of described A.C. contactor KM3 and described A.C. contactor KM2 first end of the 3rd normally opened contact.
4. pre-charge circuit as claimed in claim 3 is characterized in that, described pre-charge circuit (300) also comprises 3 resistance R 1, R6, R11 and A.C. contactor KM1;
Second end of described resistance R 2 also connects first end of described resistance R 1, second end of described resistance R 1 connect second end of first normally opened contact of described A.C. contactor KM2 and described A.C. contactor KM1 first end of first normally opened contact;
Second end of described resistance R 7 also connects first end of described resistance R 6, second end of described resistance R 6 connect second end of second normally opened contact of described A.C. contactor KM2 and described A.C. contactor KM1 first end of second normally opened contact;
Second end of described resistance R 12 also connects first end of described resistance R 11, second end of described resistance R 11 connect second end of the 3rd normally opened contact of described A.C. contactor KM2 and described A.C. contactor KM1 first end of the 3rd normally opened contact.
5. pre-charge circuit as claimed in claim 4, it is characterized in that, described pre-charge circuit (300) also comprises circuit breaker Q F, first end of first normally opened contact of described circuit breaker Q F connects second end of first normally opened contact of described A.C. contactor KM1, first end of second normally opened contact of described circuit breaker Q F connects second end of second normally opened contact of described A.C. contactor KM1, and first end of the 3rd normally opened contact of described circuit breaker Q F connects second end of the 3rd normally opened contact of described A.C. contactor KM1.
6. a high voltage converter that comprises each described pre-charge circuit (300) in the claim 1 to 5 is characterized in that, described high voltage converter also comprises rectifier transformer (100);
Described rectifier transformer (100) comprises former limit winding (101), auxiliary winding (103) and 3n secondary winding (102); N is more than or equal to 1;
Described high voltage converter also comprises the power cell (200) of 3n corresponding described secondary winding (102);
3 ends of described auxiliary winding (103) connect second end of described resistance R 5, R10 and R15 respectively;
Described power cell (200) comprises 3 input A, B, C, 10 diode D1～D10,1,4 insulated gate bipolar transistor T1～T4 of capacitor C, and two output X, Y;
Described input A connects first end of corresponding described secondary winding (102), and connects the anode of described diode D1 and the negative electrode of described diode D4;
Described input B connects second end of corresponding described secondary winding (102), and connects the anode of described diode D2 and the negative electrode of described diode D5;
Described input C connects the 3rd end of corresponding described secondary winding (102), and connects the anode of described diode D3 and the negative electrode of diode D6;
The negative electrode of described diode D1 connects the collector electrode of the negative electrode of the negative electrode of described diode D2, described diode D3, the positive pole of described capacitor C 1, the collector electrode of described insulated gate bipolar transistor T1, the negative electrode of described diode D7, described insulated gate bipolar transistor T2 and the negative electrode of described diode D8;
The anode of described diode D4 connects the emitter of the anode of the anode of described diode D5, described diode D6, the negative pole of described capacitor C 1, the emitter of described insulated gate bipolar transistor T3, the anode of described diode D9, described insulated gate bipolar transistor T4 and the anode of described diode D10;
The emitter of described insulated gate bipolar transistor T1 connects the anode of described diode D7, the collector electrode of described output Y, described insulated gate bipolar transistor T3 and the negative electrode of described diode D9;
The emitter of described insulated gate bipolar transistor T2 connects the anode of described diode D8, the collector electrode of described output X, described insulated gate bipolar transistor T4 and the negative electrode of described diode D10;
The base stage of the base stage of the base stage of described insulated gate bipolar transistor T1, described insulated gate bipolar transistor T2, described insulated gate bipolar transistor T3 is connected drive plate with the base stage of described insulated gate bipolar transistor T4;
A described 3n power cell is divided into 3 power cell groups, the output X of first power cell connects the output Y of second power cell in each power cell group, the output X of second power cell connects the output Y of the 3rd power cell, and the like, the output X of n-1 power cell connects the output Y of n power cell.
7. high voltage converter as claimed in claim 6 is characterized in that, described n is 5 or 8.
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| CN2011200735457U CN202019306U (en) | 2011-03-18 | 2011-03-18 | Pre-charge circuit and high-voltage frequency converter comprising same |
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| CN2011200735457U CN202019306U (en) | 2011-03-18 | 2011-03-18 | Pre-charge circuit and high-voltage frequency converter comprising same |
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| CN105099217A (en) * | 2014-05-20 | 2015-11-25 | 北京Abb电气传动***有限公司 | Cascade-type multi-level high-voltage frequency converter |
| CN107896065A (en) * | 2017-11-21 | 2018-04-10 | 北京合力电气传动控制技术有限责任公司 | A kind of high-power high voltage frequency converter and its control method, device, system |
| CN107911030A (en) * | 2017-11-21 | 2018-04-13 | 北京合力电气传动控制技术有限责任公司 | A kind of high-pressure frequency-conversion Multi-unit Drive Systems system and offshore platform comprehensive oil extraction system |
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- 2011-03-18 CN CN2011200735457U patent/CN202019306U/en not_active Expired - Fee Related
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|---|---|---|---|---|
| CN103078474A (en) * | 2012-12-31 | 2013-05-01 | 国家电网公司 | Soft charging device for high-voltage frequency converter and control method thereof |
| CN105099217A (en) * | 2014-05-20 | 2015-11-25 | 北京Abb电气传动***有限公司 | Cascade-type multi-level high-voltage frequency converter |
| CN104811050A (en) * | 2015-04-13 | 2015-07-29 | 广东明阳龙源电力电子有限公司 | High-voltage frequency converter with centralized charged power units |
| CN107896065A (en) * | 2017-11-21 | 2018-04-10 | 北京合力电气传动控制技术有限责任公司 | A kind of high-power high voltage frequency converter and its control method, device, system |
| CN107911030A (en) * | 2017-11-21 | 2018-04-13 | 北京合力电气传动控制技术有限责任公司 | A kind of high-pressure frequency-conversion Multi-unit Drive Systems system and offshore platform comprehensive oil extraction system |
| CN107896065B (en) * | 2017-11-21 | 2019-12-06 | 北京合力电气传动控制技术有限责任公司 | High-power high-voltage frequency converter and control method, device and system thereof |
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