CN201113742Y - High voltage large power switch reluctance motor device - Google Patents

High voltage large power switch reluctance motor device Download PDF

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Publication number
CN201113742Y
CN201113742Y CNU2007201733575U CN200720173357U CN201113742Y CN 201113742 Y CN201113742 Y CN 201113742Y CN U2007201733575 U CNU2007201733575 U CN U2007201733575U CN 200720173357 U CN200720173357 U CN 200720173357U CN 201113742 Y CN201113742 Y CN 201113742Y
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CN
China
Prior art keywords
phase
power
power cell
reluctance motor
switched reluctance
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Expired - Lifetime
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CNU2007201733575U
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Chinese (zh)
Inventor
裘锦灼
高超
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Nideke (Beijing) Transmission Technology Co. Ltd
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Beijing China Tex Mechanical & Electrical Engineering Ltd
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Abstract

The utility model provides a switched reluctance motor device with high voltage and high power. The switched reluctance motor device comprises an N-phrase switched reluctance motor with high voltage and high power, power units and a phase-shifting transformer (T1), each phrase winding corresponding to the switched reluctance motor is provided with Z power unit outputs which are directly connected in series; the switched reluctance motor device contains Z x N power units, three-phrase sources of the Z x N power units are respectively provided by secondary windings of each phrase-shifting transformer. The switched reluctance motor device has the advantages of less tie lines, reliable operation and high power with improving multiple.

Description

A kind of switched reluctance motor device with high voltage and large power
Technical field
The utility model relates to a kind of switched reluctance motor device, particularly a kind of switched reluctance motor device with high voltage and large power of direct series connection of many power cell outputs.
Background technology
Switched reluctance motor device being applied more and more widely in recent years, power demand is increasing.This system is made up of motor and controller two large divisions, and the version of motor is a lot, and form commonly used is 4 phases, 8/6 utmost points, 3 phases, 12/8 utmost point etc.
After omitting the current-limiting circuit that powers on, the main circuit of now using 4 phase switch reluctance motors as shown in Figure 1.The three phase network input obtains a direct current power power supply behind bridge rectifier and capacitor filtering; 4 brachium pontis that conspired to create by power switch and fly-wheel diode are formed the semibridge system power inversion circuit, give the energising of the motor winding with points of common connection M.
It is positive brachium pontis that power switch has the brachium pontis of a termination power anode, and power switch has the brachium pontis of a termination power negative terminal to be negative brachium pontis.The power switch of 2 positive brachium pontis takes turns conducting, conducting π electrical degree in the one-period.The power switch of 2 negative brachium pontis is also like this, but conducting differs the pi/2 electrical degree between positive brachium pontis and negative brachium pontis, and whenever therefore the energising of two phase windings all arranged.
Now with the most use is that Fig. 2 shows 3 phase switch reluctance motors, and three phase windings of motor are mutual insulatings, and the half-bridge circuit by oneself gets independently.Each half-bridge all is made of a positive brachium pontis and negative brachium pontis, and whole power inversion circuit has 6 brachium pontis.
In 3 phase switch reluctance motors, angle of flow phase phasic difference 2 π/3 electrical degrees of three phase windings.Two alternately have certain overlap angle during conducting, that is it is electric to be that a phase winding gets sometimes, sometimes be two-phase simultaneously.
Fig. 2 shows that the power of 3 phase switch reluctance motors is bigger, and the fixed/rotor number of poles of other 3 phase switch reluctance motors is generally 12/8 utmost point, and low-speed performance is relatively good.
Suitably improve after the three-phase mains voltage, the power of threephase switch reluctance motor has reached several one hundred kilowatt.This is a power switch, and the maximum rated ability of common components such as diode if adopt more high-tension power switch, then costs an arm and a leg, and also exists integrity problem.
Every phase winding of switched reluctance motor has some coils of wire to be linked to be, and as 4 phases, 8/6 pole motor 2 coils of wire is arranged, and 3 phases, 12/8 pole motor has 4 coils of wire.A kind of scheme that increases switched reluctance motor device power is that the coil of wire in the phase winding is taken apart, after each phase coil of wire is supporting, comes a minute cover to drive by a plurality of power cells that are equivalent to original power circuit.For 3 phases, 12/8 pole switching reluctance motor, if 4 coils of wire of phase winding are taken apart, be made into 4 cover three-phases, just can drive with 4 power cells, the power of switched reluctance motor device increases 4 times.
Because each power cell all is in low-voltage state, operation principle does not have big change yet, and above-mentioned many power cells divide the cover drive scheme simple and reliable, carry out easily.But the increase of line or ratio is made troubles to the user between motor and controller, also is out of order easily; The coil of wire number of motor phase winding is few in addition, and switched reluctance motor device power only can increase limited multiple.
The utility model content
It is few that technical problem to be solved in the utility model provides a kind of line, reliable, and power improves the big switched reluctance motor device with high voltage and large power of multiple.
Switched reluctance motor device with high voltage and large power described in the utility model, comprise N phase high-tension high-power switched reluctance motor, power cell and phase shifting transformer (T1) are corresponding to every phase winding of switched reluctance motor, Z power cell output, directly series connection are set; Described switched reluctance motor device comprises Z * N power cell, and each is supplied with the three phase mains of Z * N power cell by the limit winding of paying of phase shifting transformer.
Switched reluctance motor device with high voltage and large power described in the utility model, described power cell are plain edition power cell or feedback type power cell.The formation of described Z * N power cell is consistent with parameter, can exchange.
Switched reluctance motor device with high voltage and large power described in the utility model, described plain edition power cell mainly are made of fuse, three-phase bridge rectifier circuit, filter capacitor and single-phase semi-bridge formula inverter circuit.Generally be parallel with the pressure limiting discharge circuit on filter capacitor, described pressure limiting discharge circuit is conspired to create by power switch and resistance, and when motor brake, the pressure limiting discharge circuit is emitted electric energy, if electric voltage over press on the electric capacity, the pressure limiting discharge circuit is connected the power switch discharge.
Be in series with three fuses on the three phase mains of power cell, play the short-circuit protection effect; Can replace isolating switch again, cut-off when needing.
Switched reluctance motor device with high voltage and large power described in the utility model, described feedback type power cell are power switchs all in parallel on six rectifier diodes of the three-phase bridge rectifier circuit of plain edition power cell, the feedback of control energy.The feedback type power cell need not the pressure limiting discharge circuit.
Switched reluctance motor device with high voltage and large power described in the utility model, described single-phase semi-bridge formula inverter circuit comprise each one of positive and negative brachium pontis, and positive and negative brachium pontis is all conspired to create by power switch and fly-wheel diode, and series connection place is an output.Positive brachium pontis, power switch just is being terminated at positive source, with the junction of diode be the positive output end of power power-supply; Negative brachium pontis, the power switch negative terminal is connected to power cathode, with the diode junction be the negative output terminal of power cell.Power cell has positive and negative two outputs, and positive output end is the output of positive brachium pontis, and load goes out the output that end is negative brachium pontis.
Switched reluctance motor device with high voltage and large power described in the utility model, the Z of described every phase winding power cell output series connection, the negative output terminal of the 1st power cell is linked the positive output end of the 2nd power cell, connect successively, as total positive and negative output, total positive-negative output end connects the corresponding winding of motor with the negative output terminal of the positive output end of the 1st power cell and Z power cell.
Switched reluctance motor device with high voltage and large power described in the utility model, the output series connection of the Z of a described every phase winding power cell, the positive output end of the 1st power cell is linked the negative output terminal of the 2nd power cell, connects successively.As total negative, positive output, total positive-negative output end connects the corresponding winding of motor with the positive output end of the negative output terminal of the 1st power and Z power cell.
Switched reluctance motor device with high voltage and large power described in the utility model, for the N phase winding mutual insulating in no current loop, switch driven reluctance motor separately, each phase winding can be set up a points of common connection.
Switched reluctance motor device with high voltage and large power described in the utility model, for number of phases N is even number, and each phase winding has the switched reluctance motor of a points of common connection M, after Z the power cell output series connection, be connected into drive motor circuit with a points of common connection M1, float between M and M1 point or connect lead, the N of a drive circuit output plus terminal takes turns output current, and N input negative terminal takes turns input current.The electrical degree of each pair limit winding phase place phase difference of pi/(6Z) of described phase shifting transformer this moment (T1).
Switched reluctance motor device with high voltage and large power described in the utility model, the total ZN group of described phase shifting transformer (T1) is paid the limit winding, three phase mains as ZN power cell, reliably insulation between the winding of each pair limit, the three-phase line voltage equal and opposite in direction, phase place 2 π/3 electrical degrees that stagger equably, each pays the leakage inductance that the limit winding equates, and leakage inductance plays AC reactor.
Switched reluctance motor device with high voltage and large power described in the utility model, the concrete connection of paying the limit winding of described phase shifting transformer (T1) is not limit, can use star, triangle, band out-phase triangle edge, band to prolong at least a in the triangle edge, several connections that derive from, but switched in opposite ground is provided with again.Former limit winding adopts triangle or star connection, reliably insulation between former pair of limit winding, and no-load voltage ratio is selected on demand.
Switched reluctance motor device with high voltage and large power described in the utility model, the ZN group of described phase shifting transformer (T1) is paid reliably insulation between the winding of limit, the line voltage swing that paying the limit winding is provided equates, the phase place aspect, the Z of the same phase winding of drive motor pays the limit winding phase place electrical degree of π/(3Z) that staggers uniformly; The N of drive motor N phase winding pair limit winding phase place is identical.
Phase shifting transformer volume ratio described in the utility model is bigger, can not be included in the controller of system, and as system directly under parts.Phase shifting transformer generally is a power frequency three-phase transformer, and also the separated transformer of available corresponding number replaces, as 3 single-phase transformers, Z three-phase transformer etc.
Switched reluctance motor device with high voltage and large power described in the utility model, aspect control mode, preferably stagger a little the commutating period of power switch between the Z of a same phase power cell, the copped wave control of all power switchs is preferably staggered equably, the electromagnetic interference and the noise that produce when helping to reduce the device operation.
Switched reluctance motor device with high voltage and large power described in the utility model during fault, is turned off or is disconnected partly power cell, system's derate operation; When motor zero load or underloading, turn off or the breaking part power cell system's brownout operation.
The utility model adopts a plurality of power cells to unite driving, but the load of the power cell a certain phase winding that is motor, the direct series connection by a plurality of power cell direct currents outputs increases the voltage that is added on the phase winding.Motor belongs to high-voltage high-power motor, and the number of outlet is the same with common electric machine.After adopting above-mentioned phase shift power supply measure, the waveform of the utility model net side supply current is fine, only has the 6Zm-1 subharmonic in theory, and m is a positive integer, has to carry a power factor and can reach more than 0.95, so need not to add power factor compensation again and harmonic wave is faced upward the system device.In addition, it is independent that transformer is paid the work of limit winding, and each power cell is also relatively independent, and is very reliable.
Figure of description
Fig. 1: existing 4 phase switch reluctance motor device main circuits;
Fig. 2: existing 3 phase switch reluctance motor device main circuits;
Fig. 3: the used plain edition power cell of the utility model circuit diagram;
Fig. 4: the utility model 4 phase switch reluctance motor device embodiments (Z=2);
Fig. 5: the utility model 3 phase switch reluctance motor device embodiments (Z=3).
Embodiment
Embodiment 1
Fig. 3 is shown the used plain edition power cell of the utility model, mainly comprises three-phase bridge rectifier circuit, filter capacitor and single-phase semi-bridge formula inverter circuit.Dotted line is shown the pressure limiting discharge circuit among the figure, can be provided with when needing.
The single-phase inversion circuit is made up of positive brachium pontis and negative brachium pontis, and two brachium pontis all conspire to create with power switch and fly-wheel diode, is output with both junction.Positive brachium pontis, one of power switch terminates to the anode of power supply, and output is for just.Negative brachium pontis, one of power switch terminates to the negative terminal of power supply, and output is for negative.
In three-phase bridge rectifier circuit, all be parallel with power switch on 6 used rectifier diodes, just constitute the feedback type power cell, by the shutoff of power switch, during to the three-phase alternating-current supply feedback, can commutate control and copped wave are controlled at electric energy.
4 phase switch reluctance motor device schematic diagrames when Fig. 4 is shown the utility model Z=2, the output of 2 power cells of every phase series connection, shared 8 power cells.After the series connection, the positive output end of the negative output terminal of power cell UA1, UC1 and UB1, UD1 connects into common point M1.Connect the positive output end of power cell UA2, UC2 on motor A, C two phase windings respectively.Connect the negative output terminal of power cell UB2, UC2 on B, D two phase windings respectively.
Motor 4 phase windings also have a points of common connection M, can float separately between two tie points of M1 and M, also can connect lead.After connecting, on the circuit on winding A, B and winding B, the D institute's making alive just no longer interact.
The former limit star connection of phase shifting transformer T1 among the figure, 8 are paid the limit winding all is the triangle that band prolongs the limit.Paying between the winding of limit of motor two power cells that same phase winding is connected given in power supply, and line voltage phase difference π/6 electrical degrees is as pairing #1 of UA1, UA2 and #5.
Pair limit winding #1, #2, #3 and the #4 of UA1, UB1, UC1 and UD1 given in power supply, belongs to out of phase four power cells of motor, and the line voltage-phase can be identical.Better for the waveform that makes net side supply current, the output of also can divide into groups to be provided with phase place: UA1 and UC1 all is anodal, is one group; The output of UB1 and UD1 all is negative pole, is another group.Belong to same group, the line voltage-phase is identical, phase place phase difference of pi/12 then between two groups, electrical degree.#5, #6, #7 and #8 are similar.
Analogize greater than 2 situation for Z, in addition, number of phases N is 6 when waiting other even numbers, and circuit also can be analogized.
Should be pointed out that the supply voltage that is added on the motor phase winding is Z a times of three-phase rectifier power supply rectification output before the utility model copped wave.Even during Z=1, also show the big twice of circuit than Fig. 1, this helps to increase the power of system.
Embodiment 2
Switched reluctance motor device described in the utility model, the another kind of connection scope of application is wider, and is all available when the number of phases is odd number or even number, and its N phase winding itself is a mutually insulated, does not have public tie point, and they all have the independently current circuit of oneself.Motor outlet number is 2N.
With 3 phase switch reluctance motors is example, when Fig. 5 is shown Z=3, and the utility model of threephase switch reluctance motor, a shared NZ=9 power cell.The output series connection rear drive A phase winding of UA1, UA2 and UA3, the output series connection rear drive B phase winding of UB1, UB2 and UB3, the output series connection rear drive C phase winding of UC1, UC2 and UC3.
Pay the limit winding and adopt triangle and band to prolong the triangle edge connection in Fig. 5, #1, #2 and #3 power to A, B and C three phase windings, and the connection of paying the limit winding is identical, and the line voltage swing is identical with phase place.#4, #5 and #6 are like this, and #7, #8 and #9 are also like this.On the other hand, #1, #4 and #7 special power supply still equates for motor A phase winding, its line voltage swing, but line voltage-phase phase difference of pi/(3Z)=and π/9 electrical degrees, so the connection difference.#2, #5 and #8 are like this, and #3, #6 and #9 are also like this.
Shown in Figure 5, install each circuitry phase and insulate, therefore allow to have on the winding any to couple together, so that monitor winding insulation, this is the place different with system shown in Figure 2.
No matter Fig. 4 circuit or Fig. 5 circuit arrangement come multipleization power supply owing to introduced phase shifting transformer, and the waveform of the utility model net side supply current is fairly good, and harmonic component is less, and power factor can reach more than 0.95, and the efficient height is reliable.
On the other hand, the power switch of each power cell also can multiple chemical control system in the utility model.During commutation, power switch that same phase is gone here and there staggers a little, and conduction ratio is identical during copped wave, but phase place evenly staggers, and thisly multiplely melts disconnectedly, helps to reduce the running noises of motor and the electromagnetic interference that whole system is produced.
Switched reluctance motor device with high voltage and large power described in the utility model during fault, is turned off or is disconnected partly power cell, system's derate operation; When motor zero load or underloading, turn off or the breaking part power cell system's brownout operation.

Claims (8)

1, a kind of switched reluctance motor device with high voltage and large power, it is characterized in that comprising N phase high-tension high-power switched reluctance motor, power cell and phase shifting transformer (T1), corresponding to every phase winding of switched reluctance motor, Z power cell output, directly series connection are set; Described switched reluctance motor device comprises Z * N power cell, and each is supplied with the three phase mains of Z * N power cell by the limit winding of paying of phase shifting transformer.
2, switched reluctance motor device with high voltage and large power according to claim 1, it is characterized in that, described power cell is plain edition power cell or feedback type power cell, and described plain edition power cell mainly is made of fuse, three-phase bridge rectifier circuit, filter capacitor and single-phase semi-bridge formula inverter circuit and pressure limiting discharge circuit; Described feedback type power cell is a power switch all in parallel on six rectifier diodes of the three-phase bridge rectifier circuit of plain edition power cell, need not the pressure limiting discharge circuit.
3, according to the described switched reluctance motor device with high voltage and large power of claim 1, it is characterized in that, the Z of described every phase winding power cell output series connection, the negative output terminal of the 1st power cell is linked the positive output end of the 2nd power cell, connect successively, as total positive and negative output, total positive-negative output end connects the corresponding winding of motor with the negative output terminal of the positive output end of the 1st power cell and Z power cell.
4, according to the described switched reluctance motor device with high voltage and large power of claim 1, it is characterized in that, is odd number for the number of phases, and each phase winding is set up a common junction M; For number of phases N is even number, and each phase winding has the switched reluctance motor of a points of common connection M, after Z the power cell output series connection, be connected into drive motor circuit with a points of common connection M1, float between M and M1 point or connect lead, the N of a drive circuit output plus terminal takes turns output current, and N input negative terminal takes turns input current.
5, switched reluctance motor device with high voltage and large power according to claim 1, it is characterized in that, described phase shifting transformer (T1), former limit winding adopts triangle or star connection, the connection of paying the limit winding is selected from star, triangle, band out-phase triangle edge, band and prolongs at least a in the triangle edge, reliably insulation between former pair of limit winding, no-load voltage ratio is selected on demand, pay limit triple line output voltage equal and opposite in direction, phase place 2 π/3 electrical degrees that stagger equably, each pays the leakage inductance that the limit winding equates.
6, switched reluctance motor device with high voltage and large power according to claim 1, it is characterized in that, the limit winding phase place of paying each pair limit winding of described phase shifting transformer (T1), the Z of the same phase winding of drive motor the electrical degree of π/(3Z) that staggers uniformly; The N of drive motor N phase winding pair limit winding phase place is identical.
7, switched reluctance motor device with high voltage and large power according to claim 1 is characterized in that, stagger the commutating period of power switch between the Z of a same phase power cell, and the copped wave phase place staggers equably.
8, switched reluctance motor device with high voltage and large power according to claim 1 is characterized in that, during fault, turns off or disconnects partly power cell, system's derate operation; When motor zero load or underloading, turn off or the breaking part power cell system's brownout operation.
CNU2007201733575U 2007-09-26 2007-09-26 High voltage large power switch reluctance motor device Expired - Lifetime CN201113742Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2007201733575U CN201113742Y (en) 2007-09-26 2007-09-26 High voltage large power switch reluctance motor device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2007201733575U CN201113742Y (en) 2007-09-26 2007-09-26 High voltage large power switch reluctance motor device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102497111A (en) * 2011-11-20 2012-06-13 合肥华耀电子工业有限公司 Fast-control power supply system based on IPM (intelligent power module) H-bridge cascade connection

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102497111A (en) * 2011-11-20 2012-06-13 合肥华耀电子工业有限公司 Fast-control power supply system based on IPM (intelligent power module) H-bridge cascade connection
CN102497111B (en) * 2011-11-20 2014-10-22 合肥华耀电子工业有限公司 Fast-control power supply system based on IPM (intelligent power module) H-bridge cascade connection

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Owner name: NIDEC (BEIJING) DRIVE SYSTEM TECHNIQUE CO., LTD.

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Patentee before: Beijing China Tex Mechanical & Electrical Engineering Ltd.

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