CN111769663B - Dual-mode drive control system of switched reluctance motor and implementation method - Google Patents

Dual-mode drive control system of switched reluctance motor and implementation method Download PDF

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CN111769663B
CN111769663B CN202010654099.2A CN202010654099A CN111769663B CN 111769663 B CN111769663 B CN 111769663B CN 202010654099 A CN202010654099 A CN 202010654099A CN 111769663 B CN111769663 B CN 111769663B
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power converter
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windings
series
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CN111769663A (en
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胡艳芳
沈晨
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Hebei University of Technology
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Hebei University of Technology
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/08—Reluctance motors
    • H02P25/092—Converters specially adapted for controlling reluctance motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/08—Reluctance motors
    • H02P25/098—Arrangements for reducing torque ripple
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

The invention discloses a dual-mode drive control system and an implementation method of a switched reluctance motor, and belongs to the technical field of motors. When the motor runs in multiple phases, two magnetic pole coils which are opposite in the radial direction form a phase winding, each phase main circuit of the power converter is accessed, and driving signals of two main switches of each phase main circuit are asynchronous; when the phase loss operation is carried out: two magnetic pole coils which are opposite in the radial direction are connected in series to form a branch circuit, and then the other branch circuit which is adjacent to the space position forms a new phase winding; or two adjacent magnetic pole coils are connected in series to form a group, and then connected in series or in parallel with the other magnetic pole coil opposite to the radial direction to form a new phase winding; after recombination, all main switch driving signals in the main circuit of each phase of power converter are synchronous, and the main switch driving signals in the main circuits of the power converters of the adjacent new phases are asynchronous. The invention can utilize the advantages of multi-phase and few-phase motors, and has high utilization rate and wide application range.

Description

Dual-mode drive control system of switched reluctance motor and implementation method
Technical Field
The invention provides a motor drive control method for switching different operation modes of a switched reluctance motor, in particular to a motor driving control method for realizing multi-phase and few-phase switching operation of the motor by adopting a double salient pole structure and changing the connection mode of windings. In particular, it relates to a connection mode of a switched reluctance motor winding, connection of a power converter and the motor winding, and drive control of each main switch of the power converter.
Background
The Switched Reluctance Motor (SRM) has the advantages of low cost, high reliability, large starting torque and more control parameters, and has good application prospect in various fields such as aerospace, electric vehicles, household appliances and the like. The structure is flexible and various, and can be designed into a few-phase type such as three-phase 6/4 pole or four-phase 8/6 pole, and the like, and can also be designed into a type with more than four phases. The three-phase or four-phase SRM has large step angle, low switching frequency, simpler system structure and control and can run at high rotating speed; the multi-phase SRM has the advantages of small torque ripple, good starting performance and the like, and can be made into a larger capacity, but the iron core loss and the switching loss are increased due to the increase of the magnetic flux alternating frequency and the switching frequency of a power device when the rotating speed is higher, so the multi-phase SRM is suitable for medium and low speed operation.
The prior SRM only operates in a single phase number, and the prior SRM has difficulty in simultaneously obtaining excellent low-speed and high-speed operation performance in an electric transmission system.
Document "research on control of speed regulation system of switched reluctance motor based on PI parameter adaptation" (vol. 35, No. 16 in 2015) proposes a double closed-loop control method of switched reluctance motor based on PI parameter adaptation regulator, which adopts indirect control of torque current at low speed, takes the output of a rotation speed regulator as reference torque, adopts direct current control mode when the rotation speed is higher than a set value, and takes the output of the rotation speed regulator as reference current, aiming at reducing torque ripple of the motor at low speed and improving rotation speed response of the motor at high speed. The dual-mode operation mode proposed by the scheme only improves the performance of the switched reluctance motor system from the control algorithm level, and does not relate to the improvement of the performance such as power, starting capability or loss.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the dual-mode drive control system and the implementation method for the switched reluctance motor are provided, the utilization rate and the adaptability of the SRM can be improved, and the dual-mode operation of different phases can be realized by the motor under the same body structure. The invention adopts a mode of multi-phase operation at low speed and less phase operation at medium and high speed.
In order to achieve the purpose, the invention adopts the technical scheme that:
the first technical scheme is as follows: according to the dual-mode drive control system of the switched reluctance motor provided by the embodiment of the invention, a stator core and a rotor core of the switched reluctance motor are both in a salient pole structure, a magnetic pole coil is arranged on a stator magnetic pole, and the magnetic pole coil of each phase forms a winding, and the dual-mode drive control system is characterized in that: the number of poles of the stator is integral multiple of 4m, m is 2, 3 or 4, and the number of poles of the rotor is integral multiple of 2 · (2m +/-1);
when the motor system operates in multiple phases, two magnetic pole coils which are opposite in the radial direction are connected in series to form a phase winding; when the motor operates with few phases, two magnetic pole coils which are opposite in the radial direction are connected in series to form a branch circuit, and then the branch circuit is connected in parallel with another branch circuit which is adjacent to the space position to form a phase winding;
the joints of half windings which are not adjacent in spatial position are connected with the power converter through the selector switch, and the joints of the rest half windings are directly connected with the power converter.
The second technical scheme is as follows: the utility model provides a double mode drive control system of switched reluctance motor, switched reluctance motor's stator core and rotor core are salient pole structure, are equipped with the magnetic pole coil on the stator magnetic pole, and a winding, its characterized in that are constituteed to the magnetic pole coil of every looks: the number of poles of the stator is integral multiple of 4m, m is 2, 3 or 4, and the number of poles of the rotor is integral multiple of 2 · (2m +/-1);
when the motor system operates in multiple phases, two magnetic pole coils which are opposite in the radial direction are connected in series to form a phase winding; when the motor operates in a few-phase mode, two adjacent magnetic pole coils are connected in series to form a group, and then connected in series or in parallel with the other group of magnetic pole coils opposite to the radial direction to form a phase winding;
the joints of half windings which are not adjacent in spatial position are connected with the power converter through the selector switch, and the joints of the rest half windings are directly connected with the power converter.
The change-over switch is a relay or a contactor with a plurality of groups of normally open and normally closed contacts, and can also be composed of a plurality of pairs of power switch devices which work synchronously and have reverse signals, such as IGBTs or field effect transistors and the like.
The winding is concentrated to wind the tooth part of the stator core, and the rotor core has no winding or permanent magnet.
Based on the connection mode of the 2 m-phase asymmetric half-bridge power converter and the 2 m-phase winding: a group of windings which are not adjacent in spatial position are directly connected with the power converter; two ends of another group of windings which are not adjacent in spatial position are connected to two normally closed contacts of the change-over switch firstly and then connected with the power converter; the windings of the phases are independent. When the motor operates in multiple phases, the normally closed contact of the change-over switch is closed, the normally open contact is opened, and the driving signals of the two main switches of each phase of the power converter are asynchronous; when the motor operates in a few-phase mode, the change-over switch acts, the normally closed contact is opened, the normally open contact is closed, and driving signals of main switches of the power converter corresponding to the original two-phase winding forming a new phase are respectively synchronous.
Based on the connection mode of the m-phase asymmetric half-bridge power converter and the 2 m-phase winding: a group of windings which are not adjacent in spatial position are connected with a diode in series and then connected with a power converter; two ends of another group of windings which are not adjacent in spatial position are connected to two normally closed contacts of the change-over switch firstly, and then are connected with a diode in series and then are connected with the power converter; the diodes connected in series with the two phases of windings which are conducted successively are opposite in conduction direction, and the two phases of windings which are conducted successively are connected in series with the diodes in series and then connected. When the motor operates in multiple phases, the normally closed contact of the change-over switch is closed, the normally open contact is opened, and the driving signals of all the main switches of the power converter are asynchronous; when the motor operates in a few-phase mode, the change-over switch acts, the normally closed contact is opened, the normally open contact is closed, and driving signals of main switches of the power converter corresponding to the original two-phase winding forming a new phase are respectively synchronous.
The invention also discloses a method for realizing the dual-mode drive control of the switched reluctance motor, which is characterized by comprising a multi-phase operation mode and a few-phase operation mode, wherein the number of the stator magnetic poles is 4m, the multi-phase operation has 2m phases, and the few-phase operation has m phases;
when the multi-phase operation is carried out, two magnetic pole coils which are opposite in the radial direction form a phase winding, each phase main circuit of the power converter is accessed, and the driving signals of two main switches of each phase main circuit are not synchronous;
when the phase loss operation is carried out: two magnetic pole coils which are opposite in the radial direction are connected in series to form a branch circuit, and then the other branch circuit which is adjacent to the space position forms a new phase winding; or two adjacent magnetic pole coils are connected in series to form a group, and then connected in series or in parallel with the other magnetic pole coil opposite to the radial direction to form a new phase winding; after recombination, all main switch driving signals in the main circuit of each phase of power converter are synchronous, and the main switch driving signals in the main circuits of the power converters of the adjacent new phases are asynchronous.
Compared with the prior art, the invention has the main innovation that on the same motor body structure, the SRM can select a working mode according to the operation requirement by changing the winding connection mode and the conduction logic of the power switch, thereby expanding the application range of the prior art.
The invention has the following beneficial effects:
1. the method for realizing the dual-mode operation of the switched reluctance motor based on the asymmetric half-bridge power converter can realize the conversion of a multi-phase/few-phase operation mode on the basis of not changing the motor body, combines the advantages of small torque pulsation, good starting performance and the like of a multi-phase SRM and the advantages of small iron core loss of the few-phase SRM and suitability for high-speed operation on the same motor body, and improves the utilization rate of the motor. The motor can operate in a multi-phase mode or a few-phase mode by proper combination of the numbers of the stator and the rotor poles, and the motor can select the multi-phase or few-phase operation mode according to the requirements of application occasions under the same body structure by changing the winding connection mode and the drive signal conduction logic, so that the utilization rate and the adaptability of the motor are improved and the application range is expanded by utilizing the advantages of different operation modes.
2. The double-mode operation implementation method of the switched reluctance motor based on the asymmetric half-bridge power converter can adopt a multi-phase operation mode with small torque pulsation when the motor operates at low speed, and overcomes the defect of large torque pulsation of a few-phase SRM; the motor can be switched to a few-phase operation mode when the motor operates at medium and high speed, and the problems of high core loss and high switching loss of a power device when the multi-phase motor operates at high speed are solved.
3. The method for realizing the dual-mode operation of the switched reluctance motor based on the asymmetric half-bridge power converter provides a creative design idea for optimizing the performance of the SRM, and has great inspiration on the research of a high-performance SRM driving control system.
Drawings
Fig. 1 is a schematic diagram of an 12/10 pole SRM motor system for dual mode operation with six and three phases, according to the present invention.
Fig. 2 is a schematic diagram of the winding connections and flux paths of an 12/10 pole SRM of the present invention in six phase operation (only one phase winding connection is shown).
Fig. 3 is a schematic diagram of the winding connections and flux paths of an 12/10 pole SRM of the present invention in three-phase operation (only one phase winding connection is shown).
Fig. 4 is a schematic diagram of the connection between the winding and the power converter in dual mode operation of the 12/10 pole SRM of the present invention using a six-phase asymmetric half-bridge power conversion circuit.
Fig. 5 is a schematic diagram of the connection between the winding and the power converter in the dual-mode operation of the 12/10-pole SRM of the present invention implemented by a three-phase asymmetric half-bridge power conversion circuit.
In the figure: 1. a power source; 2. a power converter; 3-1, a first set of diverter switch contacts; 3-2, a second set of diverter switch contacts; 4-1, six-phase operation mode; 4-2, three-phase operation mode.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention.
Fig. 1 is a schematic diagram of an 12/10 pole SRM motor system for dual mode operation with six and three phases, according to the present invention. The switching of the six-phase operating mode 4-1 and the three-phase operating mode 4-2 is achieved by controlling the two sets of diverter switch contacts (the first set of diverter switch contacts 3-1 and the second set of diverter switch contacts 3-2). Each phase winding is connected with a power converter 2, and two ends of the power converter are connected with a power supply 1. And the six-phase operation mode is switched to a three-phase operation mode, and only two adjacent phase windings under the six-phase operation are connected in parallel to form a new phase, so that the three-phase operation is realized.
When the motor system operates in multiple phases, two magnetic pole coils which are opposite in the radial direction are connected in series to serve as a phase winding; when the motor operates with few phases, two coils which are opposite in the radial direction are firstly connected in series to form a branch circuit, and then are connected in parallel with the other adjacent branch circuit to be used as a phase winding.
As shown in fig. 2, the pole number of the stator of the switched reluctance motor is an integral multiple of 4m, m is 2, 3 or 4, and the pole number of the rotor is an integral multiple of 2 · (2m ± 1); in this embodiment, the motor is in the form of 12/10 poles, the stator and the rotor are both in a salient pole structure, 12 stator poles and 10 rotor poles are respectively and uniformly distributed on the surfaces of a stator core and a rotor core, the stator poles are provided with pole coils, two diametrically opposite pole coils form a winding, the stator poles are provided with a centralized winding, and the rotor core is neither provided with a winding nor a permanent magnet; the SRM with the combination of the number of poles of the stator and the rotor can operate in six phases and also can operate in three phases; six windings are provided during six-phase operation, each winding comprises two pole coils, three windings are provided during three-phase operation, and each winding comprises four pole coils.
In fig. 2, the 12 pole coils are marked a1、B1、C1、D1、E1、F1、A2、B2、C2、D2、E2、F2When the motor system operates in six phases, two magnetic pole coils which are opposite in radial direction are connected in series to form one phase, namely A1And A2Radially opposite to form A phase winding, B1And B2And forming a B-phase winding by radial opposition, and the like to obtain C, D, E, F-phase windings to form a six-phase winding.
Taking phase A as an example, two coils (A) diametrically opposed in six-phase operation (see FIG. 2)1And A2) Are connected in series in the forward direction to form an A-phase winding, and then are connected with two power switches (VT)1、VT2) And two diodes (VD)1And VD2) The formed power conversion circuit of one phase is connected, and each phase of the motor has two magnetic circuits connected in parallel (such as two closed dotted lines in fig. 2).
FIG. 3 is a schematic diagram of the motor of FIG. 2 operating in three phases, with two diametrically opposed pole coils connected in series to form one leg and then connected in parallel with another adjacent leg to form a phase, i.e., each phase winding includes 4 coils, and with two diametrically opposed coils (A) first1And A2，A3And A4) The two adjacent branches are connected in parallel and then connected to a phase power conversion circuit, and each phase of the motor has two mutually independent flux paths (such as two closed dotted lines in fig. 3).
Fig. 4 shows a dual-mode system embodiment of the present invention based on a six-phase asymmetric half-bridge power converter, which includes a driving circuit and main circuits, each of which is composed of two power switches (also called main switches) and two diodes, and the specific circuit structure of the power converter is implemented according to the prior art. The power converter comprises two for each phaseA power switch and two diodes, wherein the two power switches of the A phase are QAH、QALTwo diodes are DAH、DAL(ii) a Two power switches of phase B are QBH、QBLTwo diodes are DBH、DBL(ii) a Two power switches of C phase are QCH、QCLTwo diodes are DCH、DCL(ii) a Two power switches of D phase are QDH、QDLTwo diodes are DDH、DDL(ii) a Two power switches of the E phase are QEH、QELTwo diodes are DEH、DEL(ii) a Two power switches of the F phase are QFH、QFLTwo diodes are DFH、DFL. Two power switches in the same phase operate simultaneously, power switches in different phases operate simultaneously, and circuits of the phases are independent of each other.
Six phase windings A-F of SRM with 12/10 poles are divided into two groups, A, C, E phase which is not adjacent in space position is directly connected with the main circuit of each phase power converter, the other group of B, D, F phase windings which is not adjacent in space position is respectively connected with an intermediate relay with two open and two close contacts and then connected with the main circuit of each phase power converter, wherein S1And S2A pair of normally open and normally closed contacts of the same intermediate relay respectively, two pairs of contacts act simultaneously, S3And S4、S5And S6In the same manner as S1And S2(ii) a When the motor operates in six phases, S1～S6The normally closed contact of (2) is closed and the normally open contact is opened (in fig. 4, S)1The middle part is positioned at the upper part and is provided with a normally closed contact, and the middle part is positioned at the lower part and is provided with a normally open contact; s2The middle part is a normally open contact at the upper part and a normally closed contact at the lower part, S3～S6The contacts of the motor are arranged in turn), the power switches corresponding to A-F are sequentially driven at the proper rotor positions in a counterclockwise or clockwise sequence;
when the motor operates in three phases, the control signals are simultaneously sent to 3 intermediate relays to enable the motor to operate S1～S6Normally closed contact of the switchAnd closing, combining the phase A and the phase F under the original six-phase operation into a new phase A, combining the phase C and the phase B into a new phase B, combining the phase E and the phase D into a new phase C, wherein the new phase A, the new phase B and the new phase C respectively correspond to 4 power switches, and all new power switch driving signals of each phase are kept synchronous. At this time, the windings of phase A and phase F, phase C and phase B, and phase E and phase D in six-phase operation are respectively connected in parallel to form a three-phase winding, and the motor operates in three phases.
Fig. 5 shows a dual-mode system embodiment based on a three-phase asymmetric half-bridge power converter according to the present invention, wherein the power converter includes a driving circuit and a main circuit, each main circuit is composed of two power switches and two diodes, and the specific circuit structure of the power converter is implemented according to the prior art. Six phase windings A-F of the SRM with 12/10 poles are divided into two groups, wherein A, C, E phases which are not adjacent in space position are firstly connected with a diode in series and then connected with a power converter, and B, D, F phase windings which are not adjacent in space position are respectively connected with S1And S2、S3And S4、S5And S6The formed intermediate relay with two open and two close contacts is connected with a diode in series and finally connected with a power converter, so that the A phase and the F phase are synchronously controlled by the same power switch to form a new A phase, and the B phase and the C phase are synchronously controlled by the same power switch to form a new B phase when three phases run; and the D phase and the E phase are synchronously controlled by the same power switch to form a new C phase.
Wherein each power switch is common to two-phase windings that are sequentially conducting (e.g. Q)FACommon to both phase F and phase A, QABCommon to both phase A and phase B), each phase having a diode (e.g., D) connected in seriesAConnected to the winding of phase A, DBConnected to the winding of phase B, DCConnected to the C-phase winding, DDConnected to a D-phase winding, DEConnected to the winding of phase E, DFConnected to the F-phase winding), one common to both phases of the winding being successively conducted as a freewheeling element (e.g. D)ABA freewheel element common to the a phase and the B phase);
when the motor operates in six phases, S1-S6The normally closed contact is closed, the normally open contact is opened, and the normal direction is clockwise or counterclockwiseSequentially driving 6 power switches at the corresponding rotor positions of each phase; when the motor operates in three phases, 3 relays act simultaneously, S1～S6The normally closed contact is opened, the normally open contact is closed, and the power switches Q corresponding to the phase A and the phase F, the phase C and the phase B and the phase E and the phase D which form a new phase are enabled to be openedFAAnd QAB，QBCAnd QCD，QDEAnd QEFAre synchronized separately. At the moment, the phase A and the phase F, the phase C and the phase B, and the phase E and the phase D are respectively connected in parallel to form a phase winding, meanwhile, the originally coupled six-phase winding becomes an independent three-phase winding with two branches in each phase, the motor operates in three phases, and the power converter is equivalent to a three-phase asymmetric half-bridge converter.
The switch of the invention is an executing element for realizing mode switching, and can also be formed by a contactor, a plurality of synchronously working and signal-reversing pairs of switching devices such as IGBT (insulated gate bipolar translator) or field effect transistor, namely S in figure 4 or figure 51The normally open and normally closed contact positions are respectively controlled by two IGBTs which work synchronously and have reverse signals, so that the functions of the normally open and normally closed contacts are realized, and the two IGBTs which work synchronously and have reverse signals form a pair.
It is to be understood that while the present invention has been described in conjunction with the preferred embodiments thereof, it is not intended to limit the invention to those embodiments. It will be apparent to those skilled in the art from this disclosure that many changes and modifications can be made, or equivalents modified, in the embodiments of the invention without departing from the scope of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Nothing in this specification is said to apply to the prior art.

Claims (7)

1. A dual-mode drive control system of a switched reluctance motor is provided, wherein a stator core and a rotor core of the switched reluctance motor are both in a salient pole structure, a magnetic pole coil is arranged on a stator magnetic pole,each phase of magnetic pole coil forms a winding, which is characterized in that: number of stator poles 4mAn integer multiple of the number of the first and second,mis 2, 3 or 4; comprises a multi-phase operation mode and a few-phase operation mode, wherein the multi-phase operation mode has 2mWhen phase is in phase-less operation, the phase-less operation hasmPhase (1);
when the motor system operates in multiple phases, two magnetic pole coils which are opposite in the radial direction are connected in series to form a phase winding; when the motor operates with few phases, two magnetic pole coils which are opposite in the radial direction are connected in series to form a branch circuit, and then the branch circuit is connected in parallel with another branch circuit which is adjacent to the space position to form a phase winding;
the joints of half windings which are not adjacent in spatial position are connected with the power converter through the selector switch, and the joints of the rest half windings are directly connected with the power converter;
when the multi-phase operation is carried out, two magnetic pole coils which are opposite in the radial direction form a phase winding, each phase main circuit of the power converter is accessed, and the driving signals of two main switches of each phase main circuit are not synchronous;
when the phase is less than the phase, two magnetic pole coils which are opposite in the radial direction are connected in series to form a branch circuit, and then the other branch circuit which is adjacent to the space position forms a new phase winding; after recombination, all main switch driving signals in the main circuit of each phase of power converter are synchronous, and the main switch driving signals in the main circuits of the power converters of the adjacent new phases are asynchronous.
2. The switched reluctance motor dual-mode driving control system according to claim 1, wherein the switch is a relay or a contactor with a plurality of groups of normally open and normally closed contacts, and is composed of a plurality of pairs of IGBTs or field effect transistors which work synchronously and have opposite signals.
3. The dual mode driving control system of the switched reluctance motor as claimed in claim 1, wherein the windings are concentrated to wind the teeth of the stator core, the rotor core has neither windings nor permanent magnets, and the number of poles of the rotor is 2 · (2)mInteger multiples of + -1).
4. Switched reluctance machine dual mode according to claim 1Drive control system characterized by being based on 2mPhase asymmetric half-bridge power converter and 2mPhase winding connection mode: a group of windings which are not adjacent in spatial position are directly connected with the power converter; two ends of another group of windings which are not adjacent in spatial position are connected to two normally closed contacts of the change-over switch firstly and then connected with the power converter; the windings of the phases are independent.
5. The dual-mode drive control system of the switched reluctance motor as claimed in claim 4, wherein when the motor operates in multiple phases, the normally closed contact of the change-over switch is closed, the normally open contact is open, and the two main switch drive signals of each phase of the power converter are not synchronous; when the motor operates in a few-phase mode, the change-over switch acts, the normally closed contact is opened, the normally open contact is closed, and driving signals of main switches of the power converter corresponding to the original two-phase winding forming a new phase are respectively synchronous.
6. The switched reluctance motor dual-mode drive control system according to claim 1, based onmPhase asymmetric half-bridge power converter and 2mPhase winding connection mode: a group of windings which are not adjacent in spatial position are respectively connected with a diode in series and then connected with the power converter; two ends of another group of windings which are not adjacent in spatial position are connected to two normally closed contacts of the change-over switch, and then are respectively connected with a diode in series and then are connected with the power converter; the diodes connected in series with the two phases of windings which are conducted successively are opposite in conduction direction, and the two phases of windings which are conducted successively are connected in series with the diodes in series and then connected.
7. The dual-mode drive control system of the switched reluctance motor as claimed in claim 6, wherein when the motor operates in multiple phases, the normally closed contact of the transfer switch is closed, the normally open contact is open, and the drive signals of the main switches of the power converter are not synchronous; when the motor operates in a few-phase mode, the change-over switch acts, the normally closed contact is opened, the normally open contact is closed, and driving signals of main switches of the power converter corresponding to the original two-phase winding forming a new phase are respectively synchronous.
CN202010654099.2A 2020-07-09 2020-07-09 Dual-mode drive control system of switched reluctance motor and implementation method Active CN111769663B (en)

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