CN102355049B - Large power variable-frequency power supply device with adjustable output voltage ultra-wide range - Google Patents
Large power variable-frequency power supply device with adjustable output voltage ultra-wide range Download PDFInfo
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- CN102355049B CN102355049B CN 201110305920 CN201110305920A CN102355049B CN 102355049 B CN102355049 B CN 102355049B CN 201110305920 CN201110305920 CN 201110305920 CN 201110305920 A CN201110305920 A CN 201110305920A CN 102355049 B CN102355049 B CN 102355049B
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Abstract
The invention discloses a large power variable-frequency power supply device with an adjustable output voltage ultra-wide range, which comprises a monitoring operation platform and variable-frequency power supplies, wherein the quantity of the variable-frequency power supply is two, each variable-frequency power supply is respectively connected with a 10KV power supply system, a 380V control power supply and the monitoring operation platform, and the monitoring operation platform is connected with the 380V control power supply. Each variable-frequency power supply comprises a switching device, a phase shifting transformer, a three-phase module device and a current equalizing device, wherein the switching device comprises alternative-current contactors with the quantity of 6*M, the three-phase module device comprises three-phase modules with the quantity of 2*M, and the current equalizing device comprises iron-core inductances with the quantity of 6*M. Each three-phase module comprises power units with the quantity of 3*N, and each power unit comprises a three-phase pulse width modulation (PWM) reversible rectifier, an H-bridge inverter and a capacitor bank. The output voltage ultra-wide range is adjustable, at the same time, the output of rated power is maintained, power expansion is implemented on the two variable-frequency power supplies, and the large power variable-frequency power supply device is suitable for different tests of motors of different models with voltage of 13000V or less and with power of 10MW or less.
Description
Technical field
The invention belongs to electric and electronic technical field, be specifically related to the adjustable high power variable frequency power supply device of a kind of output voltage super wide range, be applicable to the motor experiment station of each large and middle size motor manufacturing enterprise, in order to the motor of various models, various electric pressures is carried out the checkout facility of quality and performance.
Background technology
China nearly all large and middle size motor manufacturing enterprise, to its production and be widely used in electric power, building materials, oil, chemical industry, coal, metallurgical, space flight, big in the industries such as military project, medium-sized three-phase AC asynchronous motor, three-phase ac synchronous motor, the motor of many kinds such as variable-frequency motor and model, it all is the checkout facility that to carry out quality and performance according to specification requirement that relevant national standard and user propose to every motor before dispatching from the factory, this checkout facility is motor research, important key link in production and the maintenance process, the quality that is related to motor manufacturing enterprise product, performance, under condition of market economy, motor properties is directly connected to the existence of motor manufacturing enterprise, development and future.And each motor manufacturing enterprise all carries out at motor experiment station the checkout facility that every motor carries out quality and performance.
The very complicated and inefficiency of traditional motor test method, test effect is not very good.Along with the manufacture level of power device and the high speed development of modern converter technique, for design, the motor test of motor test system provides the good technical condition.The multifunctional high pressure variable frequency power supply has constituted key and the nucleus equipment of modern electrical machine test macro and motor experiment station.
Because kind and the model specification of modern electrical machine are various, its operating voltage and power grade can differ greatly, and be able to satisfy the comprehensive performance test of the motor of various models, various electric pressures, and this has proposed challenge for motor experiment station and variable frequency power supply.
Popular a kind of method is to adopt to have the variable frequency power supply of common DC bus now, namely giving tested motor and accompanying the DC side of the inverter of examination motor power supply to be connected on the same public dc bus, from the success rate closed loop, the motor that is in generating state by inverter to the common DC bus feedback energy, the advantage of this method is pilot system efficient height, energy-conserving and environment-protective, and the energy that test consumes only is equivalent to about 15% of tested motor rated capacity.But this method only is applicable to low voltage grade and more powerful motor test, because be limited to the withstand voltage level of device, the inverter that is connected on the public straight edge line is difficult for output high voltage and more high-power grade.
Another kind of popular method is to adopt AC-DC-AC voltage-type Gao-high variable frequency power supply, this method is suitable for the test of various high voltages, heavy-duty motor, but be difficult to take into account the test of satisfying the different motors that electric pressure differs greatly, particularly be difficult to satisfy the test of more powerful grade of low voltage motor.
Summary of the invention
The objective of the invention is the problems referred to above at existing technology existence, provide a kind of output voltage super wide range adjustable high power variable frequency power supply device, this device can adapt to the test of the motor of 13000V and following voltage, 10MW and following power.
To achieve these goals, the present invention is by the following technical solutions:
The adjustable high power variable frequency power supply device of a kind of output voltage super wide range, it is characterized in that: comprise policer operation platform and variable frequency power supply, variable frequency power supply comprises first variable frequency power supply and second variable frequency power supply, first variable frequency power supply and second variable frequency power supply include switching device shifter, phase shifting transformer, three-phase module device and current equalizer, the phase shifting transformer of the phase shifting transformer of first variable frequency power supply and second variable frequency power supply all inserts the 10KV three-phase power supply system, and 380V control power supply provides power supply for the policer operation platform and is connected with the switching device shifter of first variable frequency power supply and the switching device shifter of second variable frequency power supply respectively by the policer operation platform.
Aforesaid switching device shifter comprises 6 * M A.C. contactor; Described three-phase module device comprises 2 * M three-phase module, three-phase module comprises pin A, pin B, pin C, pin R, pin S and pin T, three-phase module comprises 3N power cell, the output series connection of the 1st～N power cell, the 1st～N after the series connection power cell two ends are respectively pin A and the pin R of three-phase module; The output series connection of the N+1～2N power cell, the N+1 after the series connection～2N power cell two ends are respectively pin B and the pin S of three-phase module; The output series connection of the 2N+1～3N power cell, the 2N+1 after the series connection～3N power cell two ends are respectively pin C and the pin T of three-phase module; Described phase shifting transformer comprises the former limit of the three-phase winding that Y shape connects, and the former limit of three-phase winding links to each other with the 10KV three-phase power supply system, and phase shifting transformer comprises that also 6 * M * N three-phase pays the limit winding; Described current equalizer comprises 6 * M independently iron inductance or coupling iron inductance; Wherein M, N are positive integer.
Aforesaid switching device shifter comprises 12 A.C. contactors, is respectively first A.C. contactor～the 12 A.C. contactor; First A.C. contactor～the 9th A.C. contactor is five contact A.C. contactors, five contact A.C. contactors comprise contact 1, contact 2, contact 3, contact 4, contact 5 and magnet exciting coil, when the magnet exciting coil of five contact A.C. contactors is not switched on, be communicated with between five contact A.C. contactor contacts 1 and the five contact A.C. contactor contacts 3, disconnect between five contact A.C. contactor contacts 1 and the five contact A.C. contactor contacts 2 and connect disconnection connection between five contact A.C. contactor contacts 4 and the five contact A.C. contactor contacts 5; When the magnet exciting coil of five contact A.C. contactors is switched on, disconnect between five contact A.C. contactor contacts 1 and the five contact A.C. contactor contacts 3 and connecting, be communicated with between five contact A.C. contactor contacts 1 and the five contact A.C. contactor contacts 2, be communicated with between five contact A.C. contactor contacts 4 and the five contact A.C. contactor contacts 5; The tenth A.C. contactor～the 12 A.C. contactor is three contact A.C. contactors, three contact A.C. contactors comprise contact 1, contact 2, contact 3 and magnet exciting coil, when the magnet exciting coil of three contact A.C. contactors is not switched on, be communicated with between three contact A.C. contactor contacts 1 and the three contact A.C. contactor contacts 3, disconnect between three contact A.C. contactor contacts 1 and the three contact A.C. contactor contacts 2 and connecting, when the magnet exciting coil of three contact A.C. contactors is switched on, disconnect between three contact A.C. contactor contacts 1 and the three contact A.C. contactor contacts 3 and connect connection between three contact A.C. contactor contacts 1 and the three contact A.C. contactor contacts 2.
But the importation of aforesaid power cell is the three-phase PWM inverted rectifier that comprises three inductance and six IGBT, the output of power cell is the H bridge inverter that comprises four IGBT, the intermediate energy storage of power cell partly is the capacitor group, and each three-phase is paid the limit winding and is connected with the importation of a power cell in the described phase shifting transformer.
Aforesaid three-phase module device comprises 4 three-phase module, is respectively first three-phase module～the 4th three-phase module; Described current equalizer comprises 12 iron inductances, is respectively the first iron inductance L
1～the ten two iron inductance L
12Described variable frequency power supply also comprises center line Y
0, A phase output line Ua, B phase output line Ub and C output line Uc mutually;
The first A.C. contactor contact 1 is connected with the first three-phase module pin A, and the first A.C. contactor contact 3 is connected with the second three-phase module pin R, the first A.C. contactor contact 2 and center line Y
0Connect, the first A.C. contactor contact 4 is connected with the second three-phase module pin R, and the first A.C. contactor contact 5 is by the 4th iron inductance L
4Ua is connected with A phase output line;
The second A.C. contactor contact 1 is connected with the first three-phase module pin B, and the second A.C. contactor contact 3 is connected with the second three-phase module pin S, the second A.C. contactor contact 2 and center line Y
0Connect, the second A.C. contactor contact 4 is connected with the second three-phase module pin S, and the second A.C. contactor contact 5 is by the 5th iron inductance L
5With B phase output line U
bConnect;
The 3rd A.C. contactor contact 1 is connected with the first three-phase module pin C, and the 3rd A.C. contactor contact 3 is connected with the second three-phase module pin T, the 3rd A.C. contactor contact 2 and center line Y
0Connect, the 3rd A.C. contactor contact 4 is connected with the second three-phase module pin T, and the 3rd A.C. contactor contact 5 is by the 6th iron inductance L
6Uc is connected with C phase output line;
The 4th A.C. contactor contact 1 is connected with the second three-phase module pin A, and the 4th A.C. contactor contact 3 is connected with the 3rd three-phase module pin R, the 4th A.C. contactor contact 2 and center line Y
0Connect, the 4th A.C. contactor contact 4 is connected with the 3rd three-phase module pin R, and the 4th A.C. contactor contact 5 is by the 7th iron inductance L
7Ua is connected with A phase output line;
The 5th A.C. contactor contact 1 is connected with the second three-phase module pin B, and the 5th A.C. contactor contact 3 is connected with the 3rd three-phase module pin S, the 5th A.C. contactor contact 2 and center line Y
0Connect, the 5th A.C. contactor contact 4 is connected with the 3rd three-phase module pin S, and the 5th A.C. contactor contact 5 is by the 8th iron inductance L
8Ub is connected with B phase output line;
The 6th A.C. contactor contact 1 is connected with the second three-phase module pin C, and the 6th A.C. contactor contact 3 is connected with the 3rd three-phase module pin T, the 6th A.C. contactor contact 2 and center line Y
0Connect, the 6th A.C. contactor contact 4 is connected with the 3rd three-phase module pin T, and the 6th A.C. contactor contact 5 is by Kowloon Railway Bureau core inductance L
9Uc is connected with C phase output line;
The 7th A.C. contactor contact 1 is connected with the 3rd three-phase module pin A, and the 7th A.C. contactor contact 3 is connected with the 4th three-phase module pin R, the 7th A.C. contactor contact 2 and center line Y
0Connect, the 7th A.C. contactor contact 4 is connected with the 4th three-phase module pin R, and the 7th A.C. contactor contact 5 is by the tenth iron inductance L
10Ua is connected with A phase output line;
The 8th A.C. contactor contact 1 is connected with the 3rd three-phase module pin B, and the 8th A.C. contactor contact 3 is connected with the 4th three-phase module pin S, the 8th A.C. contactor contact 2 and center line Y
0Connect, the 8th A.C. contactor contact 4 is connected with the 4th three-phase module pin S, and the 8th A.C. contactor contact 5 is by the 11 iron inductance L
11Ub is connected with B phase output line;
The 9th A.C. contactor contact 1 is connected with the 3rd three-phase module pin C, and the 9th A.C. contactor contact 3 is connected with the 4th three-phase module pin T, the 9th A.C. contactor contact 2 and center line Y
0Connect, the 9th A.C. contactor contact 4 is connected with the 4th three-phase module pin T, and the 9th A.C. contactor contact 5 is by the 12 iron inductance L
12Uc is connected with C phase output line;
The pin A of the 4th three-phase module, pin B and pin C respectively with center line Y
0Connect;
The tenth A.C. contactor contact 1 is connected with the first three-phase module pin R, and the tenth A.C. contactor contact 3 is connected with A phase output line Ua, and the tenth A.C. contactor contact 2 is by the first iron inductance L
1Ua is connected with A phase output line;
The 11 A.C. contactor contact 1 is connected with the first three-phase module pin S, and the 11 A.C. contactor contact 3 is connected with B phase output line Ub, and the 11 A.C. contactor contact 2 is by the second iron inductance L
2Ub is connected with B phase output line;
The 12 A.C. contactor contact 1 is connected with the first three-phase module pin T, and the 12 A.C. contactor contact 3 is connected with C phase output line Uc, and the 12 A.C. contactor contact 2 is by the 3rd iron core inductance L
3Uc is connected with C phase output line.
Compared with prior art, advantage of the present invention and beneficial effect are:
1, the high power variable frequency power supply device of adjustable, the permanent power output of a kind of output voltage super wide range is provided, can have adapted to the motor test of 13000V and following voltage, 10MW and following power.
2, can reduce the equipment expenses investment of motor experiment station.
3, can reduce kind and the platform number of the configuration of motor experiment station variable frequency power supply, reduce motor experiment station factory building area, be convenient to maintenance and the management of equipment.
4, be conducive to improve efficient and the level of the detection test of motor combination property.
Description of drawings
Fig. 1 is the principle schematic of the adjustable high power variable frequency power supply device of a kind of output voltage super wide range;
Fig. 2 is the principle schematic of variable frequency power supply among Fig. 1;
Fig. 3 is the structural representation of the three-phase module among Fig. 2;
Fig. 4 is the structural representation of the power cell among Fig. 3;
Fig. 5 is phase shifting transformer and power cell connection diagram;
Fig. 6 is a kind of structural representation after Fig. 2 switches through switching device shifter;
Fig. 7 is the another kind of structural representation after Fig. 2 switches through switching device shifter;
Fig. 8 is another structural representation after Fig. 2 switches through switching device shifter.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail.
As shown in Figure 1, the adjustable high power variable frequency power supply device of a kind of output voltage super wide range, comprise policer operation platform and variable frequency power supply, variable frequency power supply comprises first variable frequency power supply and second variable frequency power supply, first variable frequency power supply and second variable frequency power supply include switching device shifter, phase shifting transformer, three-phase module device and current equalizer, the phase shifting transformer of the phase shifting transformer of first variable frequency power supply and second variable frequency power supply all inserts the 10KV three-phase power supply system, and 380V control power supply provides power supply for the policer operation platform and is connected with the switching device shifter of first variable frequency power supply and the switching device shifter of second variable frequency power supply respectively by the policer operation platform.
As Fig. 2, Fig. 3, shown in Figure 5, switching device shifter comprises 6 * M A.C. contactor; Described three-phase module device comprises 2 * M three-phase module, three-phase module comprises pin A, pin B, pin C, pin R, pin S and pin T, three-phase module comprises 3N power cell, the output series connection of the 1st～N power cell, the 1st～N after the series connection power cell two ends are respectively pin A and the pin R of three-phase module; The output series connection of the N+1～2N power cell, the N+1 after the series connection～2N power cell two ends are respectively pin B and the pin S of three-phase module; The output series connection of the 2N+1～3N power cell, the 2N+1 after the series connection～3N power cell two ends are respectively pin C and the pin T of three-phase module; Described phase shifting transformer comprises the former limit of the three-phase winding that Y shape connects, and the former limit of three-phase winding links to each other with the 10KV three-phase power supply system, and phase shifting transformer comprises that also 6 * M * N three-phase pays the limit winding; Described current equalizer comprises 6 * M independently iron inductance or coupling iron inductance; Wherein M, N are positive integer.
As a kind of preferred version, switching device shifter comprises 12 A.C. contactors, is respectively first A.C. contactor～the 12 A.C. contactor; First A.C. contactor～the 9th A.C. contactor is five contact A.C. contactors, five contact A.C. contactors comprise contact 1, contact 2, contact 3, contact 4, contact 5 and magnet exciting coil, when the magnet exciting coil of five contact A.C. contactors is not switched on, be communicated with between five contact A.C. contactor contacts 1 and the five contact A.C. contactor contacts 3, disconnect between five contact A.C. contactor contacts 1 and the five contact A.C. contactor contacts 2 and connect disconnection connection between five contact A.C. contactor contacts 4 and the five contact A.C. contactor contacts 5; When the magnet exciting coil of five contact A.C. contactors is switched on, disconnect between five contact A.C. contactor contacts 1 and the five contact A.C. contactor contacts 3 and connecting, be communicated with between five contact A.C. contactor contacts 1 and the five contact A.C. contactor contacts 2, be communicated with between five contact A.C. contactor contacts 4 and the five contact A.C. contactor contacts 5; The tenth A.C. contactor～the 12 A.C. contactor is three contact A.C. contactors, three contact A.C. contactors comprise contact 1, contact 2, contact 3 and magnet exciting coil, when the magnet exciting coil of three contact A.C. contactors is not switched on, be communicated with between three contact A.C. contactor contacts 1 and the three contact A.C. contactor contacts 3, disconnect between three contact A.C. contactor contacts 1 and the three contact A.C. contactor contacts 2 and connecting, when the magnet exciting coil of three contact A.C. contactors is switched on, disconnect between three contact A.C. contactor contacts 1 and the three contact A.C. contactor contacts 3 and connect connection between three contact A.C. contactor contacts 1 and the three contact A.C. contactor contacts 2.
The three-phase module device comprises 4 three-phase module, is respectively first three-phase module～the 4th three-phase module; Current equalizer comprises 12 iron inductances, is respectively the first iron inductance L
1～the ten two iron inductance L
12Variable frequency power supply also comprises center line Y
0, A phase output line Ua, B phase output line Ub and C output line Uc mutually;
The first A.C. contactor contact 1 is connected with the first three-phase module pin A, and the first A.C. contactor contact 3 is connected with the second three-phase module pin R, the first A.C. contactor contact 2 and center line Y
0Connect, the first A.C. contactor contact 4 is connected with the second three-phase module pin R, and the first A.C. contactor contact 5 is by the 4th iron inductance L
4Ua is connected with A phase output line;
The second A.C. contactor contact 1 is connected with the first three-phase module pin B, and the second A.C. contactor contact 3 is connected with the second three-phase module pin S, the second A.C. contactor contact 2 and center line Y
0Connect, the second A.C. contactor contact 4 is connected with the second three-phase module pin S, and the second A.C. contactor contact 5 is by the 5th iron inductance L
5With B phase output line U
bConnect;
The 3rd A.C. contactor contact 1 is connected with the first three-phase module pin C, and the 3rd A.C. contactor contact 3 is connected with the second three-phase module pin T, the 3rd A.C. contactor contact 2 and center line Y
0Connect, the 3rd A.C. contactor contact 4 is connected with the second three-phase module pin T, and the 3rd A.C. contactor contact 5 is by the 6th iron inductance L
6Uc is connected with C phase output line;
The 4th A.C. contactor contact 1 is connected with the second three-phase module pin A, and the 4th A.C. contactor contact 3 is connected with the 3rd three-phase module pin R, the 4th A.C. contactor contact 2 and center line Y
0Connect, the 4th A.C. contactor contact 4 is connected with the 3rd three-phase module pin R, and the 4th A.C. contactor contact 5 is by the 7th iron inductance L
7Ua is connected with A phase output line;
The 5th A.C. contactor contact 1 is connected with the second three-phase module pin B, and the 5th A.C. contactor contact 3 is connected with the 3rd three-phase module pin S, the 5th A.C. contactor contact 2 and center line Y
0Connect, the 5th A.C. contactor contact 4 is connected with the 3rd three-phase module pin S, and the 5th A.C. contactor contact 5 is by the 8th iron inductance L
8Ub is connected with B phase output line;
The 6th A.C. contactor contact 1 is connected with the second three-phase module pin C, and the 6th A.C. contactor contact 3 is connected with the 3rd three-phase module pin T, the 6th A.C. contactor contact 2 and center line Y
0Connect, the 6th A.C. contactor contact 4 is connected with the 3rd three-phase module pin T, and the 6th A.C. contactor contact 5 is by Kowloon Railway Bureau core inductance L
9Uc is connected with C phase output line;
The 7th A.C. contactor contact 1 is connected with the 3rd three-phase module pin A, and the 7th A.C. contactor contact 3 is connected with the 4th three-phase module pin R, the 7th A.C. contactor contact 2 and center line Y
0Connect, the 7th A.C. contactor contact 4 is connected with the 4th three-phase module pin R, and the 7th A.C. contactor contact 5 is by the tenth iron inductance L
10Ua is connected with A phase output line;
The 8th A.C. contactor contact 1 is connected with the 3rd three-phase module pin B, and the 8th A.C. contactor contact 3 is connected with the 4th three-phase module pin S, the 8th A.C. contactor contact 2 and center line Y
0Connect, the 8th A.C. contactor contact 4 is connected with the 4th three-phase module pin S, and the 8th A.C. contactor contact 5 is by the 11 iron inductance L
11Ub is connected with B phase output line;
The 9th A.C. contactor contact 1 is connected with the 3rd three-phase module pin C, and the 9th A.C. contactor contact 3 is connected with the 4th three-phase module pin T, the 9th A.C. contactor contact 2 and center line Y
0Connect, the 9th A.C. contactor contact 4 is connected with the 4th three-phase module pin T, and the 9th A.C. contactor contact 5 is by the 12 iron inductance L
12Uc is connected with C phase output line;
The pin A of the 4th three-phase module, pin B and pin C respectively with center line Y
0Connect;
The tenth A.C. contactor contact 1 is connected with the first three-phase module pin R, and the tenth A.C. contactor contact 3 is connected with A phase output line Ua, and the tenth A.C. contactor contact 2 is by the first iron inductance L
1Ua is connected with A phase output line;
The 11 A.C. contactor contact 1 is connected with the first three-phase module pin S, and the 11 A.C. contactor contact 3 is connected with B phase output line Ub, and the 11 A.C. contactor contact 2 is by the second iron inductance L
2Ub is connected with B phase output line;
The 12 A.C. contactor contact 1 is connected with the first three-phase module pin T, and the 12 A.C. contactor contact 3 is connected with C phase output line Uc, and the 12 A.C. contactor contact 2 is by the 3rd iron core inductance L
3Uc is connected with C phase output line.
As Fig. 4, shown in Figure 5, but the importation of power cell is the three-phase PWM inverted rectifier that comprises three inductance and six IGBT, the output of power cell is the H bridge inverter that comprises four IGBT, the intermediate energy storage of power cell partly is the capacitor group, and each three-phase is paid the limit winding and is connected with the importation of a power cell in the described phase shifting transformer.
State as shown in Figure 2, the control coil of first A.C. contactor～the 12 A.C. contactor all is in off-position, all normally-closed contacts are connected, all normally opened contacts disconnect, this moment, first three-phase module～the 4th three-phase module was in the tandem working state, first iron inductance～the 12 iron inductance is isolated, the output of variable frequency power supply high voltage.Switch structural representation afterwards as shown in Figure 6 through first A.C. contactor～the 12 A.C. contactor.
When the policer operation platform sends instruction, make the 4th A.C. contactor～the 6th A.C. contactor (KM4～KM6), the tenth A.C. contactor～the 13 A.C. contactor (and the magnet exciting coil of KM10～KM13) is connected rated voltage, and first A.C. contactor～the 3rd A.C. contactor ((magnet exciting coil of KM7～KM9) still is in off-position for KM1～KM3), the 7th A.C. contactor～the 9th A.C. contactor.So, ((each among the KM10～KM13) is to the normally opened contact closure for KM4～KM6), the tenth A.C. contactor～the 13 A.C. contactor for the 4th A.C. contactor～the 6th A.C. contactor, normally-closed contact disconnects, namely the 4th A.C. contactor～the 6th A.C. contactor ((connect with contact 2 for KM4～KM6), the tenth A.C. contactor～the 13 A.C. contactor by the contact 1 among the KM10～KM13), disconnect with contact 3, the 4th A.C. contactor～the 6th A.C. contactor (connect with contact 5 by the contact 4 of KM4～KM6).And first A.C. contactor～the 3rd A.C. contactor ((magnet exciting coil of KM7～KM9) still is in off-position for KM1～KM3), the 7th A.C. contactor～the 9th A.C. contactor, its each on-state to contact remains unchanged, like this, the state that switch to form is: first three-phase module connect with second three-phase module, the 3rd three-phase module is connected with the 4th three-phase module, and these two groups three-phase module of connecting connect first iron inductance～the 3rd iron core inductance more respectively, and ((three-phase in parallel is exported behind the L7～L9) for L1～L3), the 7th iron inductance～Kowloon Railway Bureau core inductance.This three-phase module two and two after switching is gone here and there the export structure schematic diagrames as shown in Figure 7.
When the policer operation platform is sent instruction, (magnet exciting coil of KM1～KM12) is connected rated voltage to make first A.C. contactor～the 12 A.C. contactor, so, all normally opened contact closures of whole 12 A.C. contactors, normally-closed contact disconnects, at this moment, first three-phase module～the 4th three-phase module respectively with output in parallel again after first iron inductance～the 12 iron inductance is connected, this four three-phase module parallel heavy-current export structure schematic diagrames are as shown in Figure 8.
Claims (1)
1. high power variable frequency power supply device that the output voltage super wide range is adjustable, it is characterized in that: comprise policer operation platform and variable frequency power supply, variable frequency power supply comprises first variable frequency power supply and second variable frequency power supply, first variable frequency power supply and second variable frequency power supply include switching device shifter, phase shifting transformer, three-phase module device and current equalizer, the phase shifting transformer of the phase shifting transformer of first variable frequency power supply and second variable frequency power supply all inserts the 10KV three-phase power supply system, and 380V control power supply provides power supply for the policer operation platform and is connected with the switching device shifter of first variable frequency power supply and the switching device shifter of second variable frequency power supply respectively by the policer operation platform;
Switching device shifter comprises 6 * M A.C. contactor; Described three-phase module device comprises 2 * M three-phase module, three-phase module comprises pin A, pin B, pin C, pin R, pin S and pin T, three-phase module comprises 3 * N power cell, the output series connection of the 1st ~ N power cell, the 1st ~ N after the series connection power cell two ends are respectively pin A and the pin R of three-phase module; The output series connection of the N+1 ~ 2N power cell, the N+1 after the series connection ~ 2N power cell two ends are respectively pin B and the pin S of three-phase module; The output series connection of the 2nd N+1 ~ 3N power cell, the power cell two ends of the 2nd N+1 ~ 3N after the series connection are respectively pin C and the pin T of three-phase module; Described phase shifting transformer comprises the former limit of the three-phase winding that Y shape connects, and the former limit of three-phase winding links to each other with the 10KV three-phase power supply system, and phase shifting transformer also comprises 6 * M * N three-phase secondary winding; Described current equalizer comprises 6 * M independently iron inductance or coupling iron inductance; Wherein M is 2, N is positive integer;
A.C. contactor is respectively first A.C. contactor ~ the 12 A.C. contactor; First A.C. contactor ~ the 9th A.C. contactor is five contact A.C. contactors, five contact A.C. contactors comprise contact 1, contact 2, contact 3, contact 4, contact 5 and magnet exciting coil, when the magnet exciting coil of five contact A.C. contactors is not switched on, be communicated with between five contact A.C. contactor contacts 1 and the five contact A.C. contactor contacts 3, disconnect between five contact A.C. contactor contacts 1 and the five contact A.C. contactor contacts 2 and connect disconnection connection between five contact A.C. contactor contacts 4 and the five contact A.C. contactor contacts 5; When the magnet exciting coil of five contact A.C. contactors is switched on, disconnect between five contact A.C. contactor contacts 1 and the five contact A.C. contactor contacts 3 and connecting, be communicated with between five contact A.C. contactor contacts 1 and the five contact A.C. contactor contacts 2, be communicated with between five contact A.C. contactor contacts 4 and the five contact A.C. contactor contacts 5; The tenth A.C. contactor ~ the 12 A.C. contactor is three contact A.C. contactors, three contact A.C. contactors comprise contact 1, contact 2, contact 3 and magnet exciting coil, when the magnet exciting coil of three contact A.C. contactors is not switched on, be communicated with between three contact A.C. contactor contacts 1 and the three contact A.C. contactor contacts 3, disconnect between three contact A.C. contactor contacts 1 and the three contact A.C. contactor contacts 2 and connecting, when the magnet exciting coil of three contact A.C. contactors is switched on, disconnect between three contact A.C. contactor contacts 1 and the three contact A.C. contactor contacts 3 and connect connection between three contact A.C. contactor contacts 1 and the three contact A.C. contactor contacts 2;
But the importation of power cell is the three-phase PWM inverted rectifier that comprises three inductance and six IGBT, the output of power cell is the H bridge inverter that comprises four IGBT, the intermediate energy storage of power cell partly is the capacitor group, and each three-phase secondary winding is connected with the importation of a power cell in the described phase shifting transformer;
Three-phase module is respectively first three-phase module ~ the 4th three-phase module; Described current equalizer comprises 12 iron inductances, is respectively the first iron inductance L
1~ the ten two iron inductance L
12Described variable frequency power supply also comprises center line Y
0, A phase output line Ua, B phase output line Ub and C output line Uc mutually;
The first A.C. contactor contact 1 is connected with the first three-phase module pin A, and the first A.C. contactor contact 3 is connected with the second three-phase module pin R, the first A.C. contactor contact 2 and center line Y
0Connect, the first A.C. contactor contact 4 is connected with the second three-phase module pin R, and the first A.C. contactor contact 5 is by the 4th iron inductance L
4Ua is connected with A phase output line;
The second A.C. contactor contact 1 is connected with the first three-phase module pin B, and the second A.C. contactor contact 3 is connected with the second three-phase module pin S, the second A.C. contactor contact 2 and center line Y
0Connect, the second A.C. contactor contact 4 is connected with the second three-phase module pin S, and the second A.C. contactor contact 5 is by the 5th iron inductance L
5With B phase output line U
bConnect;
The 3rd A.C. contactor contact 1 is connected with the first three-phase module pin C, and the 3rd A.C. contactor contact 3 is connected with the second three-phase module pin T, the 3rd A.C. contactor contact 2 and center line Y
0Connect, the 3rd A.C. contactor contact 4 is connected with the second three-phase module pin T, and the 3rd A.C. contactor contact 5 is by the 6th iron inductance L
6Uc is connected with C phase output line;
The 4th A.C. contactor contact 1 is connected with the second three-phase module pin A, and the 4th A.C. contactor contact 3 is connected with the 3rd three-phase module pin R, the 4th A.C. contactor contact 2 and center line Y
0Connect, the 4th A.C. contactor contact 4 is connected with the 3rd three-phase module pin R, and the 4th A.C. contactor contact 5 is by the 7th iron inductance L
7Ua is connected with A phase output line;
The 5th A.C. contactor contact 1 is connected with the second three-phase module pin B, and the 5th A.C. contactor contact 3 is connected with the 3rd three-phase module pin S, the 5th A.C. contactor contact 2 and center line Y
0Connect, the 5th A.C. contactor contact 4 is connected with the 3rd three-phase module pin S, and the 5th A.C. contactor contact 5 is by the 8th iron inductance L
8Ub is connected with B phase output line;
The 6th A.C. contactor contact 1 is connected with the second three-phase module pin C, and the 6th A.C. contactor contact 3 is connected with the 3rd three-phase module pin T, the 6th A.C. contactor contact 2 and center line Y
0Connect, the 6th A.C. contactor contact 4 is connected with the 3rd three-phase module pin T, and the 6th A.C. contactor contact 5 is by Kowloon Railway Bureau core inductance L
9Uc is connected with C phase output line;
The 7th A.C. contactor contact 1 is connected with the 3rd three-phase module pin A, and the 7th A.C. contactor contact 3 is connected with the 4th three-phase module pin R, the 7th A.C. contactor contact 2 and center line Y
0Connect, the 7th A.C. contactor contact 4 is connected with the 4th three-phase module pin R, and the 7th A.C. contactor contact 5 is by the tenth iron inductance L
10Ua is connected with A phase output line;
The 8th A.C. contactor contact 1 is connected with the 3rd three-phase module pin B, and the 8th A.C. contactor contact 3 is connected with the 4th three-phase module pin S, the 8th A.C. contactor contact 2 and center line Y
0Connect, the 8th A.C. contactor contact 4 is connected with the 4th three-phase module pin S, and the 8th A.C. contactor contact 5 is by the 11 iron inductance L
11Ub is connected with B phase output line;
The 9th A.C. contactor contact 1 is connected with the 3rd three-phase module pin C, and the 9th A.C. contactor contact 3 is connected with the 4th three-phase module pin T, the 9th A.C. contactor contact 2 and center line Y
0Connect, the 9th A.C. contactor contact 4 is connected with the 4th three-phase module pin T, and the 9th A.C. contactor contact 5 is by the 12 iron inductance L
12Uc is connected with C phase output line;
The pin A of the 4th three-phase module, pin B and pin C respectively with center line Y
0Connect;
The tenth A.C. contactor contact 1 is connected with the first three-phase module pin R, and the tenth A.C. contactor contact 3 is connected with A phase output line Ua, and the tenth A.C. contactor contact 2 is by the first iron inductance L
1Ua is connected with A phase output line;
The 11 A.C. contactor contact 1 is connected with the first three-phase module pin S, and the 11 A.C. contactor contact 3 is connected with B phase output line Ub, and the 11 A.C. contactor contact 2 is by the second iron inductance L
2Ub is connected with B phase output line;
The 12 A.C. contactor contact 1 is connected with the first three-phase module pin T, and the 12 A.C. contactor contact 3 is connected with C phase output line Uc, and the 12 A.C. contactor contact 2 is by the 3rd iron core inductance L
3Uc is connected with C phase output line.
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| CN 201110305920 CN102355049B (en) | 2011-10-11 | 2011-10-11 | Large power variable-frequency power supply device with adjustable output voltage ultra-wide range |
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| CN 201110305920 CN102355049B (en) | 2011-10-11 | 2011-10-11 | Large power variable-frequency power supply device with adjustable output voltage ultra-wide range |
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| CN103795323A (en) * | 2012-11-02 | 2014-05-14 | 上海电气集团股份有限公司 | High-voltage frequency-conversion speed-regulation system and control method thereof |
| CN105048825B (en) * | 2015-09-23 | 2018-11-20 | 大禹电气科技股份有限公司 | Super high power cascaded high-voltage frequency converter and its method for inhibiting surge |
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| CN201018451Y (en) * | 2007-03-13 | 2008-02-06 | 广东明阳龙源电力电子有限公司 | Variable frequency speed regulation system |
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Denomination of invention: Large power variable-frequency power supply device with adjustable output voltage ultra-wide range Effective date of registration: 20140318 Granted publication date: 20130814 Pledgee: Hubei junior Finance Leasing Co., Ltd. Pledgor: Hubei Sanhuan Development Co., Ltd. Registration number: 2014990000172 |
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