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CN111654199A - Asymmetric half-bridge power converter for switched reluctance motor and control method thereof - Google Patents

Asymmetric half-bridge power converter for switched reluctance motor and control method thereof Download PDF

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Publication number
CN111654199A
CN111654199A CN202010460246.2A CN202010460246A CN111654199A CN 111654199 A CN111654199 A CN 111654199A CN 202010460246 A CN202010460246 A CN 202010460246A CN 111654199 A CN111654199 A CN 111654199A
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phase
switch
power diode
power
switch tube
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赵传放
杨恒
罗琳
蒋伟
王千龙
贺笑
孙林峰
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Yangzhou University
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Yangzhou University
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
    • H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
    • H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
    • H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
    • H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/5388—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with asymmetrical configuration of switches
    • 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

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

Abstract

The invention discloses an asymmetric half-bridge power converter of a switched reluctance motor, which comprises a first main circuit and a second main circuit, wherein the first main circuit and the second main circuit are connected to a power supply through an LC filter and are connected in parallel, the first main circuit comprises a fourth power diode D4, a first electrolytic capacitor C1, an A-phase motor and a C-phase motor, the A-phase motor and the C-phase motor respectively comprise two groups of switching tubes, two groups of diodes and a group of windings, and the A-phase motor and the C-phase motor share one group of switching tubes and one group of diodes; the second main circuit comprises an eighth power diode D8, a second electrolytic capacitor C2, a B-phase motor and a D-phase motor, wherein the B-phase motor and the D-phase motor respectively comprise two groups of switching tubes, two groups of diodes and a group of windings, and the B-phase motor and the D-phase motor share one group of switching tubes and one group of diodes.

Description

一种开关磁阻电机不对称半桥功率变换器及其控制方法Asymmetric half-bridge power converter for switched reluctance motor and control method thereof

技术领域technical field

本发明涉及一种功率变换器，特别涉及一种开关磁阻电机不对称半桥功率变换器。The invention relates to a power converter, in particular to an asymmetric half-bridge power converter of a switched reluctance motor.

背景技术Background technique

开关磁阻电机具有高可靠性、起动转矩大、制造成本低等优势，其功率拓扑结构一直是各国国家研究的热点，合适的拓扑结构可以降低开关磁阻电机的成本，提高开关磁阻电机的动态特性，拓宽开关磁阻电机的应用场合。Switched reluctance motors have the advantages of high reliability, large starting torque, and low manufacturing costs. The dynamic characteristics of the switch widen the application of the switched reluctance motor.

在传统的开关磁阻电机驱动系统中，应用最广泛而且最典型的功率变换器是不对称半桥型功率变换器拓扑结构，该变换器可以实现对定子各相绕组的独立控制，并在电机运行过程中为其提供斩波期间的续流回路和换相时的快速退磁回路，控制过程简单易于实现。In the traditional switched reluctance motor drive system, the most widely used and most typical power converter is the asymmetric half-bridge power converter topology, which can realize independent control of each phase winding of the stator, and has During operation, it provides a freewheeling circuit during chopping and a fast demagnetizing circuit during commutation, and the control process is simple and easy to implement.

但是，该变换器的缺点是定子绕组的每一相都要用两个开关管和两个续流二极管，而且每相都需要各自安装一个电流传感器用于电流检测，随着电机绕组相数的增加，电机系统的体积和成本将会明显增加，系统的可靠性也会降低。However, the disadvantage of this converter is that two switch tubes and two freewheeling diodes are required for each phase of the stator winding, and each phase needs to be installed with a current sensor for current detection. If it increases, the volume and cost of the motor system will increase significantly, and the reliability of the system will also decrease.

发明内容SUMMARY OF THE INVENTION

本发明的目的是提供一种开关磁阻电机不对称半桥功率变换器及其控制方法，其体积小、成本低、可靠性强。The purpose of the present invention is to provide an asymmetric half-bridge power converter of a switched reluctance motor and a control method thereof, which are small in size, low in cost and strong in reliability.

本发明的目的是这样实现的：一种开关磁阻电机不对称半桥功率变换器，包括经LC滤波器连接在电源上的第一主电路和第二主电路，所述第一主电路和第二主电路并联，所述第一主电路包括第四功率二极管D4、第一电解电容C1以及A相电机、C相电机，所述A相电机和C相电机均包括两组开关管、两组二极管以及一组绕组，其中A相电机、C相电机共用一组开关管和一组二极管；所述第二主电路包括第八功率二极管D8、第二电解电容C2以及B相电机、D相电机，所述B相电机和D相电机均包括两组开关管、两组二极管以及一组绕组，其中B相电机、D相电机共用一组开关管和一组二极管。The object of the present invention is achieved as follows: an asymmetric half-bridge power converter for a switched reluctance motor, comprising a first main circuit and a second main circuit connected to a power supply via an LC filter, the first main circuit and the The second main circuit is connected in parallel, and the first main circuit includes a fourth power diode D4, a first electrolytic capacitor C1, and an A-phase motor and a C-phase motor. Both the A-phase motor and the C-phase motor include two sets of switch tubes, two A group of diodes and a group of windings, wherein the A-phase motor and the C-phase motor share a group of switch tubes and a group of diodes; the second main circuit includes an eighth power diode D8, a second electrolytic capacitor C2, and B-phase motors and D-phase motors The motor, the B-phase motor and the D-phase motor both include two sets of switch tubes, two sets of diodes and a set of windings, wherein the B-phase motor and the D-phase motor share one set of switch tubes and one set of diodes.

作为本发明的进一步限定，所述A相电机包括第一开关管S1、第二开关管S2、第一功率二极管D1、第二功率二极管D2和A相绕阻；As a further limitation of the present invention, the A-phase motor includes a first switch S1, a second switch S2, a first power diode D1, a second power diode D2 and a phase A winding;

第一开关管S1的第一端与电源的第一端连接，第一开关管S1的第二端与第一功率二极管D1的负极端连接，第二功率二极管D2的负极端与第一开关管S1的第一端、电源的第一端连接，第二功率二极管D2的正极端与第二开关管S2的第一端连接，第二开关管S2的第二端与第一功率二极管D1的正极端、电源的第二端连接，A相绕阻的第一端与第一开关管S1的第二端、第一功率二极管D1的负极端连接，A相绕阻的第二端与第二开关管S1的第一端、第二功率二极管D1的正极端连接。The first end of the first switch tube S1 is connected to the first end of the power supply, the second end of the first switch tube S1 is connected to the negative end of the first power diode D1, and the negative end of the second power diode D2 is connected to the first switch tube The first end of S1 is connected to the first end of the power supply, the positive end of the second power diode D2 is connected to the first end of the second switch tube S2, and the second end of the second switch tube S2 is connected to the positive end of the first power diode D1 The terminal is connected to the second end of the power supply, the first end of the A-phase winding is connected to the second end of the first switch tube S1 and the negative end of the first power diode D1, and the second end of the A-phase winding is connected to the second switch The first end of the tube S1 and the positive end of the second power diode D1 are connected.

作为本发明的进一步限定，所述C相电机包括第二开关管S2、第三开关管S3、第二功率二极管D2、第三功率二极管D3和C相绕阻，其与A相电机共用第二开关管S2和第二功率二极管D2；As a further limitation of the present invention, the C-phase motor includes a second switch tube S2, a third switch tube S3, a second power diode D2, a third power diode D3 and a C-phase winding, which share the second switch with the A-phase motor. a switch tube S2 and a second power diode D2;

第三开关管S3的第一端与电源的第一端、第一开关管S1的第一端、第二功率二极管D2的负极端连接，第三开关管S3的第二端与第三功率二极管D3的负极端连接，第三功率二极管D3的正极端与第二开关管S2的第二端、第一功率二极管D1的正极端、电源的第二端连接，C相绕阻的第一端与绕阻A的第二端、第二功率二极管D2的正极端、第二开关管S2的第一端连接，C相绕阻的第二端与第三开关管S3的第二端、第三功率二极管D3的负极端连接。The first end of the third switch S3 is connected to the first end of the power supply, the first end of the first switch S1, and the negative end of the second power diode D2, and the second end of the third switch S3 is connected to the third power diode The negative terminal of D3 is connected, the positive terminal of the third power diode D3 is connected to the second terminal of the second switch tube S2, the positive terminal of the first power diode D1, and the second terminal of the power supply, and the first terminal of the C-phase winding is connected to The second end of the winding A, the positive end of the second power diode D2, and the first end of the second switch tube S2 are connected, and the second end of the C-phase winding is connected to the second end of the third switch tube S3, the third power The negative terminal of diode D3 is connected.

作为本发明的进一步限定，所述B相电机包括第五开关管S5、第六开关管S6、第五功率二极管D5、第六功率二极管D6和B相绕阻；As a further limitation of the present invention, the B-phase motor includes a fifth switch S5, a sixth switch S6, a fifth power diode D5, a sixth power diode D6 and a B-phase winding;

第五开关管S5的第一端与电源的第一端连接，第五开关管S5的第二端与第五功率二极管D5的负极端连接，第六功率二极管D6的负极端与第五开关管S5的第一端、电源的第一端连接，第六功率二极管D6的正极端与第六开关管S6的第一端连接，第六开关管S6的第二端与第五功率二极管D5的正极端、电源的第二端连接，第五功率二极管D5的正极端与电源的第二端连接，B相绕阻的第一端与第五开关管S5的第二端、第五功率二极管D5的负极端连接，B相绕阻的第二端与第六开关管S6的第一端、第六功率二极管D6的正极端相连。The first end of the fifth switch tube S5 is connected to the first end of the power supply, the second end of the fifth switch tube S5 is connected to the negative end of the fifth power diode D5, and the negative end of the sixth power diode D6 is connected to the fifth switch tube The first end of S5 is connected to the first end of the power supply, the positive end of the sixth power diode D6 is connected to the first end of the sixth switch tube S6, and the second end of the sixth switch tube S6 is connected to the positive end of the fifth power diode D5 The terminal is connected to the second terminal of the power supply, the positive terminal of the fifth power diode D5 is connected to the second terminal of the power supply, and the first terminal of the B-phase winding is connected to the second terminal of the fifth switch tube S5 and the second terminal of the fifth power diode D5. The negative terminal is connected, and the second terminal of the B-phase winding is connected to the first terminal of the sixth switch tube S6 and the positive terminal of the sixth power diode D6.

作为本发明的进一步限定，所述D相电机包括第六开关管S6、第七开关管S7、第六功率二极管D6、第七功率二极管D7和D相绕阻，其与B相电机共用第六开关管S6和第六功率二极管D6；As a further limitation of the present invention, the D-phase motor includes a sixth switch S6, a seventh switch S7, a sixth power diode D6, a seventh power diode D7 and a D-phase winding, which share the sixth switch with the B-phase motor. switch tube S6 and sixth power diode D6;

第七开关管S7的第一端与电源的第一端、第五开关管S5的第一端、第六功率二极管D2的负极端连接，第七开关管S7的第二端与第七功率二极管D7的负极端连接，第七功率二极管D7的正极端与第六开关管S6的第二端、第五功率二极管D5的正极端、电源的第二端连接，D相绕阻的第一端与绕阻B的第二端、第六功率二极管D6的正极端、第六开关管S6的第一端连接，D相绕阻的第二端与第七开关管S7的第二端、第七功率二极管D7的负极端连接。The first end of the seventh switch S7 is connected to the first end of the power supply, the first end of the fifth switch S5, and the negative end of the sixth power diode D2, and the second end of the seventh switch S7 is connected to the seventh power diode The negative terminal of D7 is connected, the positive terminal of the seventh power diode D7 is connected to the second terminal of the sixth switch tube S6, the positive terminal of the fifth power diode D5, and the second terminal of the power supply, and the first terminal of the D phase winding is connected to The second end of the winding B, the positive end of the sixth power diode D6, and the first end of the sixth switch S6 are connected, and the second end of the D-phase winding is connected to the second end of the seventh switch S7 and the seventh power The negative terminal of diode D7 is connected.

作为本发明的进一步限定，每相绕组均包括三种工作模式：励磁模式、零电压需流模式以及退磁模式；具体如下：当上开关管和下开关管均导通时，电源向电机供电，绕组两端承受正电压U，绕组电流上升，此为励磁模式；当上开关管关断而下开关管导通时，绕组两端电压为零，绕组电流经过下开关管和下功率二极管完成通路，绕组电流缓慢下降，此为零电压续流模式；当上开关管和下开关管均关断，绕组两端承受负电压-U，相电流通过下功率二极管D1和上功率二极管D2进行能量回馈，绕组电流快速下降，此为退磁模式；上述为一相供电周期。As a further limitation of the present invention, each phase winding includes three working modes: excitation mode, zero-voltage current demand mode and demagnetization mode; the details are as follows: when the upper switch tube and the lower switch tube are both turned on, the power supply supplies power to the motor, Both ends of the winding are subjected to a positive voltage U, and the winding current rises, which is the excitation mode; when the upper switch tube is turned off and the lower switch tube is turned on, the voltage across the winding is zero, and the winding current passes through the lower switch tube and the lower power diode to complete the path , the winding current decreases slowly, this is the zero-voltage freewheeling mode; when both the upper switch tube and the lower switch tube are turned off, the two ends of the winding are subjected to a negative voltage -U, and the phase current passes through the lower power diode D1 and the upper power diode D2 for energy feedback , the winding current drops rapidly, this is the demagnetization mode; the above is the one-phase power supply cycle.

一种开关磁阻电机不对称半桥功率变换器控制方法，采用上述开关磁阻电机不对称半桥功率变换器，包括三种控制模式，分别为单相励磁模式、双相励磁模式以及单双混合励磁模式；A method for controlling an asymmetric half-bridge power converter of a switched reluctance motor, using the above-mentioned asymmetric half-bridge power converter of a switched reluctance motor, including three control modes, namely a single-phase excitation mode, a two-phase excitation mode, and a single-phase excitation mode and a single-phase excitation mode. Mixed excitation mode;

单相励磁模式下，任意时刻只对一相绕组进行励磁，按照A=>B=>C=>D=>A的方式循环；In the single-phase excitation mode, only one-phase winding is excited at any time, and it circulates in the way of A=>B=>C=>D=>A;

双相励磁模式下，同一时刻对处于上升区的绕组进行励磁，按照AB=>BC=>CD=>DA=>AB的方式循环，且相邻两相同时励磁时，将两相绕组的极性设置为相反的极性；In the dual-phase excitation mode, the windings in the rising region are excited at the same time, and the cycle is performed in the manner of AB=>BC=>CD=>DA=>AB, and when two adjacent two-phase windings are excited at the same time, the poles of the two-phase windings are energized at the same time. sex is set to opposite polarity;

双模式运行的状态下，启动时采用双相励磁，正常运行时采用单向励磁。In the state of dual-mode operation, dual-phase excitation is used at startup, and unidirectional excitation is used during normal operation.

作为本发明的进一步限定，所述双模式运行的状态下，在系统运行过程中，不断的检测系统输入电流，当电流大于某个区间时，启动双相励磁模式，当电流下降到某个区间时，启动单相励磁模式，所述区间为滞环式的。As a further limitation of the present invention, in the state of the dual-mode operation, during the operation of the system, the input current of the system is continuously detected, when the current is greater than a certain interval, the dual-phase excitation mode is activated, and when the current drops to a certain interval , the single-phase excitation mode is activated, and the interval is hysteretic.

与现有技术相比，本发明的有益效果在于：Compared with the prior art, the beneficial effects of the present invention are:

（1）本发明提供的共用开关管的开关磁阻电机不对称半桥功率变换器，在不对称半桥拓扑基础上进行改变，不仅保留了不对称半桥功率变换器的优点，而且每相所用的主开关器件少于两个，可以有效减少开关器件，克服了不对称半桥电路中每相需要两个主开关器件的缺点；(1) The asymmetric half-bridge power converter of the switched reluctance motor with a shared switch tube provided by the present invention is changed on the basis of the asymmetric half-bridge topology, which not only retains the advantages of the asymmetric half-bridge power converter, but also saves the power of each phase. The number of main switching devices used is less than two, which can effectively reduce the number of switching devices and overcome the shortcoming of requiring two main switching devices for each phase in the asymmetric half-bridge circuit;

（2）可以增加开关磁阻电机相数，减小转矩脉动，弥补了经典不对称桥式驱动电路所用开关器件数量多、控制电路的成本高且整个开关磁阻电机驱动器的体积大的不足，节省了控制电路的成本；(2) The number of phases of the switched reluctance motor can be increased, and the torque ripple can be reduced, which makes up for the shortcomings of the large number of switching devices used in the classic asymmetric bridge drive circuit, the high cost of the control circuit and the large volume of the entire switched reluctance motor driver. , saving the cost of the control circuit;

（3）由于开关磁阻电机的相电流是单向的，故可以采用单极性的功率变换器，这使得其功率主电路不仅简单，而且具有普通交流及无刷直流驱动系统所没有的优点，即相绕组与主开关器件是串联的，因而可预防短路故障。(3) Since the phase current of the switched reluctance motor is unidirectional, a unipolar power converter can be used, which makes its main power circuit not only simple, but also has the advantages that ordinary AC and brushless DC drive systems do not have. , that is, the phase winding is connected in series with the main switching device, thus preventing short-circuit faults.

附图说明Description of drawings

图1为本发明提供的开关磁阻电机不对称半桥功率变换器拓扑结构。FIG. 1 is a topology structure of a switched reluctance motor asymmetric half-bridge power converter provided by the present invention.

图2为本发明实施方式中励磁模式的电路拓扑图。FIG. 2 is a circuit topology diagram of an excitation mode in an embodiment of the present invention.

图3为本发明实施方式中零电压续流模式的电路拓扑图。FIG. 3 is a circuit topology diagram of a zero-voltage freewheeling mode in an embodiment of the present invention.

图4为本发明实施方式中退磁模式的电路拓扑图。FIG. 4 is a circuit topology diagram of a demagnetization mode in an embodiment of the present invention.

图5为本发明实施方式中双模式运行流程图。FIG. 5 is a flow chart of dual-mode operation in an embodiment of the present invention.

具体实施方式Detailed ways

下面结合具体实施例对本发明做进一步说明。The present invention will be further described below with reference to specific embodiments.

如图1所示的本发明提供一种共用开关管的开关磁阻电机不对称半桥功率变换器，包括电源、LC滤波器、第四功率二极管D4、第八功率二极管D8、第一电解电容C1、第二电解电容C2和四相电机（A、B、C、D），第一电解电容C1、第二电解电容C2均并联在电源两端。As shown in FIG. 1 , the present invention provides a switched reluctance motor asymmetric half-bridge power converter with a shared switch tube, including a power supply, an LC filter, a fourth power diode D4, an eighth power diode D8, and a first electrolytic capacitor. C1, the second electrolytic capacitor C2 and the four-phase motor (A, B, C, D), the first electrolytic capacitor C1 and the second electrolytic capacitor C2 are connected in parallel at both ends of the power supply.

每相电机均包括两个开关管、两个功率二极管和一个绕组，A相电机与C相电机共用一个开关管，B相电机与D相电机共用一个开关管。Each phase motor includes two switch tubes, two power diodes and a winding. A-phase motor and C-phase motor share one switch tube, and B-phase motor and D-phase motor share one switch tube.

具体地，A相电机包括第一开关管S1、第二开关管S2、第一功率二极管D1、第二功率二极管D2和A相绕阻。第一开关管S1的第一端与电源的第一端连接，第一开关管S1的第二端与第一功率二极管D1的负极端连接，第二功率二极管D2的负极端与第一开关管S1的第一端、电源的第一端连接，第二功率二极管D2的正极端与第二开关管S2的第一端连接，第二开关管S2的第二端与第一功率二极管D1的正极端、电源的第二端连接，第一功率二极管D1的正极端与电源的第二端连接。A相绕阻的第一端与第一开关管S1的第二端、第一功率二极管D1的负极端连接，A相绕阻的第二端与C相绕阻连接。Specifically, the A-phase motor includes a first switch S1 , a second switch S2 , a first power diode D1 , a second power diode D2 and an A-phase winding. The first end of the first switch tube S1 is connected to the first end of the power supply, the second end of the first switch tube S1 is connected to the negative end of the first power diode D1, and the negative end of the second power diode D2 is connected to the first switch tube The first end of S1 is connected to the first end of the power supply, the positive end of the second power diode D2 is connected to the first end of the second switch tube S2, and the second end of the second switch tube S2 is connected to the positive end of the first power diode D1 The terminal is connected to the second terminal of the power supply, and the positive terminal of the first power diode D1 is connected to the second terminal of the power supply. The first end of the A-phase winding is connected to the second end of the first switch tube S1 and the negative terminal of the first power diode D1, and the second end of the A-phase winding is connected to the C-phase winding.

C相电机与A相电机共用第二开关管S2和第二功率二极管D2。C相电机包括第二开关管S2、第三开关管S3、第二功率二极管D2、第三功率二极管D3和C相绕阻。第三开关管S3的第一端与电源的第一端、第一开关管S1的第一端、第二功率二极管D2的负极端连接，第三开关管S3的第二端与第三功率二极管D3的负极端连接，第三功率二极管D3的正极端与第二开关管S2的第二端、第一功率二极管D1的正极端、电源的第二端连接。C相绕阻的第一端与A相绕阻的第二端、第二功率二极管D2的正极端、第二开关管S2的第一端连接，C相绕阻的第二端与第三开关管S3的第二端、第三功率二极管D3的负极端连接。The C-phase motor and the A-phase motor share the second switch tube S2 and the second power diode D2. The C-phase motor includes a second switch S2, a third switch S3, a second power diode D2, a third power diode D3 and a C-phase winding. The first end of the third switch S3 is connected to the first end of the power supply, the first end of the first switch S1, and the negative end of the second power diode D2, and the second end of the third switch S3 is connected to the third power diode The negative terminal of D3 is connected, and the positive terminal of the third power diode D3 is connected to the second terminal of the second switch tube S2, the positive terminal of the first power diode D1, and the second terminal of the power supply. The first end of the C-phase winding is connected to the second end of the A-phase winding, the positive end of the second power diode D2, and the first end of the second switch tube S2, and the second end of the C-phase winding is connected to the third switch The second end of the tube S3 and the negative end of the third power diode D3 are connected.

B相电机包括第五开关管S5、第六开关管S6、第五功率二极管D5、第六功率二极管D6和B相绕阻。第五开关管S5的第一端与电源的第一端连接，第五开关管S5的第二端与第五功率二极管D5的负极端连接，第六功率二极管D6的负极端与第五开关管S5的第一端、电源的第一端连接，第六功率二极管D6的正极端与第六开关管S6的第一端连接，第六开关管S6的第二端与第五功率二极管D5的正极端、电源的第二端连接，第五功率二极管D5的正极端与电源的第二端连接。B相绕阻的第一端与第五开关管S5的第二端、第五功率二极管D5的负极端连接，B相绕阻的第二端与D相绕阻连接。The B-phase motor includes a fifth switch S5, a sixth switch S6, a fifth power diode D5, a sixth power diode D6 and a B-phase winding. The first end of the fifth switch tube S5 is connected to the first end of the power supply, the second end of the fifth switch tube S5 is connected to the negative end of the fifth power diode D5, and the negative end of the sixth power diode D6 is connected to the fifth switch tube The first end of S5 is connected to the first end of the power supply, the positive end of the sixth power diode D6 is connected to the first end of the sixth switch tube S6, and the second end of the sixth switch tube S6 is connected to the positive end of the fifth power diode D5 The terminal is connected to the second terminal of the power supply, and the positive terminal of the fifth power diode D5 is connected to the second terminal of the power supply. The first end of the B-phase winding is connected to the second end of the fifth switch tube S5 and the negative terminal of the fifth power diode D5, and the second end of the B-phase winding is connected to the D-phase winding.

D相电机与B相电机共用第六开关管S6和第六功率二极管D6。D相电机包括第六开关管S6、第七开关管S7、第六功率二极管D6、第七功率二极管D7和绕阻D。第七开关管S7的第一端与电源的第一端、第五开关管S5的第一端、第六功率二极管D2的负极端连接，第七开关管S7的第二端与第七功率二极管D7的负极端连接，第七功率二极管D7的正极端与第六开关管S6的第二端、第五功率二极管D5的正极端、电源的第二端连接。D相绕阻的第一端与绕阻B的第二端、第六功率二极管D6的正极端、第六开关管S6的第一端连接，D相绕阻的第二端与第七开关管S7的第二端、第七功率二极管D7的负极端连接。The D-phase motor and the B-phase motor share the sixth switch tube S6 and the sixth power diode D6. The D-phase motor includes a sixth switch S6, a seventh switch S7, a sixth power diode D6, a seventh power diode D7 and a winding D. The first end of the seventh switch S7 is connected to the first end of the power supply, the first end of the fifth switch S5, and the negative end of the sixth power diode D2, and the second end of the seventh switch S7 is connected to the seventh power diode The negative terminal of D7 is connected, and the positive terminal of the seventh power diode D7 is connected to the second terminal of the sixth switch tube S6, the positive terminal of the fifth power diode D5, and the second terminal of the power supply. The first end of the D-phase winding is connected to the second end of the winding B, the positive end of the sixth power diode D6, and the first end of the sixth switch tube S6, and the second end of the D-phase winding is connected to the seventh switch tube The second terminal of S7 and the negative terminal of the seventh power diode D7 are connected.

第一电解电容C1的第一端与电源的第一端、第四功率二极管D4的负极端连接，第一电解电容C1的第二端与电源的第二端、第一功率二极管D1的正极端、第二开关管S2的第二端、第三功率二极管D3的正极端连接。第四功率二极管D4的正极端与电源的第一端连接；第四功率二极管D4与第一电解电容C1配合实现馈能和稳压作用。The first end of the first electrolytic capacitor C1 is connected to the first end of the power supply and the negative end of the fourth power diode D4, and the second end of the first electrolytic capacitor C1 is connected to the second end of the power supply and the positive end of the first power diode D1. , the second end of the second switch tube S2 and the positive end of the third power diode D3 are connected. The positive terminal of the fourth power diode D4 is connected to the first terminal of the power supply; the fourth power diode D4 cooperates with the first electrolytic capacitor C1 to realize energy feeding and voltage regulation.

第二电解电容C2的第一端与电源的第一端、第八功率二极管D8的负极端连接，第二电解电容C2的第二端与电源的第二端、第五功率二极管D5的正极端、第六开关管S6的第二端、第七功率二极管D7的正极端连接。第二电解电容C2的第二端还与第一电解电容C1的第二端连接，实现对B相电机、D相电机的供电；第八功率二极管D8的正极端与电源的第一端连接。第八功率二极管D8与第二电解电容C2配合实现馈能和稳压作用。The first end of the second electrolytic capacitor C2 is connected to the first end of the power supply and the negative end of the eighth power diode D8, and the second end of the second electrolytic capacitor C2 is connected to the second end of the power supply and the positive end of the fifth power diode D5 , the second end of the sixth switch tube S6 and the positive end of the seventh power diode D7 are connected. The second end of the second electrolytic capacitor C2 is also connected to the second end of the first electrolytic capacitor C1 to supply power to the B-phase motor and the D-phase motor; the positive end of the eighth power diode D8 is connected to the first end of the power supply. The eighth power diode D8 cooperates with the second electrolytic capacitor C2 to realize energy feeding and voltage stabilization.

第一开关管S1、第二开关管S2、第三开关管S3、第五开关管S5、第六开关管S6和第七开关管S7均选用场效应晶体管。The first switch S1, the second switch S2, the third switch S3, the fifth switch S5, the sixth switch S6 and the seventh switch S7 are all field effect transistors.

在开关磁阻电机的运行过程中，根据上下管的导通方式，每相绕组有三种工作模式：励磁模式、零电压续流模式以及退磁模式。During the operation of the switched reluctance motor, according to the conduction mode of the upper and lower tubes, each phase winding has three working modes: excitation mode, zero-voltage freewheeling mode and demagnetization mode.

以A相为例，如图2所示，当第一开关管S1（上开关管）和第二开关管S2（下开关管）均导通时，电源向A相电机供电，绕组两端承受正电压U，绕组电流上升，此为励磁模式；如图3所示，当第一开关管S1关断而第二开关管S2导通时，绕组两端电压为零，绕组电流经过第二开关管S2和第一功率二极管D1完成通路，绕组电流缓慢下降，此为零电压续流模式；如图4所示，当第一开关管S1和第二开关管S2均关断，绕组两端承受负电压-U，相电流通过第一功率二极管D1和第二功率二极管D2进行能量回馈，绕组电流快速下降，此为退磁模式。上述为一相供电周期。Taking Phase A as an example, as shown in Figure 2, when both the first switch tube S1 (upper switch tube) and the second switch tube S2 (lower switch tube) are turned on, the power supply supplies power to the A-phase motor, and both ends of the winding are subjected to Positive voltage U, the winding current rises, this is the excitation mode; as shown in Figure 3, when the first switch S1 is turned off and the second switch S2 is turned on, the voltage across the winding is zero, and the winding current passes through the second switch. The transistor S2 and the first power diode D1 complete the path, and the winding current decreases slowly, which is a zero-voltage freewheeling mode; as shown in Figure 4, when the first switch S1 and the second switch S2 are both turned off, both ends of the winding are subjected to Negative voltage -U, the phase current performs energy feedback through the first power diode D1 and the second power diode D2, and the winding current drops rapidly, which is the demagnetization mode. The above is a one-phase power supply cycle.

给A、B、C、D相电机依次供电，从A相切换到B相时，通过A相回馈电能存储在第一电解电容C1中，这部分能量能够用于迅速提升C相的电流从而缩短励磁时间；从B相切换到C相时，通过B相回馈电能存储在第二电解电容C2中，这部分能量能够用于迅速提升D相的电流从而缩短励磁时间；从C相切换到D相时，通过C相回馈电能存储在第一电解电容C1中，这部分能量能够用于迅速提升A相的电流从而缩短励磁时间；从D相切换到A相时，通过D相回馈电能存储在第二电解电容C2中，这部分能量能够用于迅速提升B相的电流从而缩短励磁时间，此过程循环往复大大缩短了供电周期，减少了损耗。同时采用本发明A相、C相共用开关管，B相、D相共用开关管，再将A相、C相与B相、D相并联的模式，还能从减少开关器件的个数来减小损耗，实现体积减小和成本减低以及驱动性能的优化。Supply power to A, B, C, and D-phase motors in sequence. When switching from A-phase to B-phase, the feedback energy through A-phase is stored in the first electrolytic capacitor C1. This part of the energy can be used to rapidly increase the current of C-phase to shorten the time. Excitation time; when switching from B-phase to C-phase, the feedback energy through B-phase is stored in the second electrolytic capacitor C2, and this part of the energy can be used to rapidly increase the current of D-phase to shorten the excitation time; switch from C-phase to D-phase When switching from D-phase to A-phase, the feedback energy through D-phase is stored in the first electrolytic capacitor C1, and this part of the energy can be used to rapidly increase the current of A-phase to shorten the excitation time; In the second electrolytic capacitor C2, this part of the energy can be used to rapidly increase the current of the B-phase to shorten the excitation time. The cycle of this process greatly shortens the power supply cycle and reduces the loss. At the same time, by using the A-phase and C-phase shared switch tubes, B-phase and D-phase shared switch tubes, and then paralleling A-phase and C-phase with B-phase and D-phase of the present invention, the number of switching devices can be reduced. Small loss, volume reduction and cost reduction, and optimization of drive performance.

本发明中提出了双模式运行的状态，把整个工作过程分成起动和正常运行；电机起动时采用双相励磁，能够达到大的转矩，正常运行的时候用单相励磁；单相励磁即任意时刻只对一相绕组进行励磁，双相励磁即同一时刻对两相电感处于上升区的绕组进行励磁。双相励磁模式和单双混合励磁模式都存在一个相邻相同时励磁的情况，如果两个相邻相同时励磁，将其极性设置为相反的极性，则磁力线此时可以走短磁路；如当B相和C相同时励磁且极性相反的时候，B相和C相之间可以形成短磁路，产生一个反向的磁力线，虽然磁力线是反向的，但是其生成的力的大小值与电流的有效值有关，并不影响转矩的产生。其中，短磁路的意思是磁力线不穿过整个电机，不是由上至下经过一个半圆穿过去的，而是当有两个磁动势的磁力线圆的时候，两者是反向的，互相吸引，能够在邻近的极上形成一个很小的磁力线的回路，这样可以减少转子轭上的电磁损耗，提高效率，增加输出，使产生力的效果更好，提高了带载能力。In the present invention, the state of dual-mode operation is proposed, and the whole working process is divided into starting and normal operation; when the motor starts, two-phase excitation is used, which can achieve large torque, and single-phase excitation is used during normal operation; single-phase excitation means any Only one-phase winding is excited at any time, and two-phase excitation is to excite the winding whose two-phase inductance is in the rising region at the same time. Both the dual-phase excitation mode and the single-dual hybrid excitation mode have a situation where they are excited when they are adjacent to each other. If two adjacent ones are excited when they are the same, set their polarities to opposite polarities, then the magnetic lines of force can take a short magnetic path at this time. ; For example, when B-phase and C-phase are excited and the polarities are opposite, a short magnetic circuit can be formed between B-phase and C-phase, resulting in a reverse magnetic field line, although the magnetic field line is reversed, but the generated force The magnitude value is related to the effective value of the current and does not affect the generation of torque. Among them, the short magnetic circuit means that the magnetic line of force does not pass through the entire motor, and does not pass through a semicircle from top to bottom, but when there are two circles of magnetic force lines of magnetomotive force, the two are opposite to each other. Attraction can form a small loop of magnetic field lines on the adjacent poles, which can reduce the electromagnetic loss on the rotor yoke, improve the efficiency, increase the output, make the force generation effect better, and improve the load capacity.

另外，如图5所示，在双模式运行过程中，可以在单相励磁和双相励磁之间来回切换，其判断的准则是系统的电流（即i L ）：在系统运行的过程中，不断循环地检测系统的电流，当电流大于某一个区间值IREFHIGH的时候，就启动双相励磁。当电流下降到某一个区间值IREFLOW的时候，就切换回单相励磁；其判断区间是滞环式的，不存在反复切换的问题。In addition, as shown in Figure 5, during the dual-mode operation, it is possible to switch back and forth between single-phase excitation and dual-phase excitation, and the criterion for judging is the current of the system (ie i L ): during the operation of the system, The current of the system is continuously detected in a loop, and when the current is greater than a certain interval value I REFHIGH , the two-phase excitation is started. When the current drops to a certain interval value I REFLOW , it switches back to single-phase excitation; the judgment interval is hysteretic, and there is no problem of repeated switching.

综合上述，本发明提供的共用开关管的开关磁阻电机不对称半桥功率变换器，在不对称半桥拓扑基础上进行改变，不仅保留了不对称半桥功率变换器的优点，而且每相所用的主开关器件少于两个，可以有效减少开关器件，克服了不对称半桥电路中每相需要两个主开关器件的缺点。To sum up the above, the switched reluctance motor asymmetric half-bridge power converter with a shared switch tube provided by the present invention is changed on the basis of the asymmetric half-bridge topology, which not only retains the advantages of the asymmetric half-bridge power converter, but also saves the power of each phase. The number of main switching devices used is less than two, which can effectively reduce the number of switching devices and overcome the disadvantage of requiring two main switching devices for each phase in the asymmetric half-bridge circuit.

同时，可以增加开关磁阻电机相数，减小转矩脉动，弥补了经典不对称桥式驱动电路所用开关器件数量多、控制电路的成本高且整个开关磁阻电机驱动器的体积大的不足，节省了控制电路的成本。At the same time, the number of phases of the switched reluctance motor can be increased to reduce the torque ripple, which makes up for the shortcomings of the large number of switching devices used in the classic asymmetric bridge drive circuit, the high cost of the control circuit and the large volume of the entire switched reluctance motor driver. The cost of the control circuit is saved.

由于开关磁阻电机的相电流是单向的，故可以采用单极性的功率变换器，这使得其功率主电路不仅简单，而且具有普通交流及无刷直流驱动系统所没有的优点，即相绕组与主开关器件是串联的，因而可预防短路故障。Since the phase current of the switched reluctance motor is unidirectional, a unipolar power converter can be used, which makes its main power circuit not only simple, but also has the advantages that ordinary AC and brushless DC drive systems do not have. The windings are connected in series with the main switching device, thus preventing short circuit faults.

本发明并不局限于上述实施例，在本发明公开的技术方案的基础上，本领域的技术人员根据所公开的技术内容，不需要创造性的劳动就可以对其中的一些技术特征作出一些替换和变形，这些替换和变形均在本发明的保护范围内。The present invention is not limited to the above-mentioned embodiments. On the basis of the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some of the technical features according to the disclosed technical contents without creative work. Modifications, replacements and modifications are all within the protection scope of the present invention.

Claims (8)

1.一种开关磁阻电机不对称半桥功率变换器，其特征在于，包括经LC滤波器连接在电源上的第一主电路和第二主电路，所述第一主电路和第二主电路并联，所述第一主电路包括第四功率二极管D4、第一电解电容C1以及A相电机、C相电机，所述A相电机和C相电机均包括两组开关管、两组二极管以及一组绕组，其中A相电机、C相电机共用一组开关管和一组二极管；所述第二主电路包括第八功率二极管D8、第二电解电容C2以及B相电机、D相电机，所述B相电机和D相电机均包括两组开关管、两组二极管以及一组绕组，其中B相电机、D相电机共用一组开关管和一组二极管。1. A switched reluctance motor asymmetric half-bridge power converter, characterized in that it comprises a first main circuit and a second main circuit connected to a power supply via an LC filter, the first main circuit and the second main circuit are The circuits are connected in parallel, and the first main circuit includes a fourth power diode D4, a first electrolytic capacitor C1, and an A-phase motor and a C-phase motor. Both the A-phase motor and the C-phase motor include two sets of switch tubes, two sets of diodes, and A group of windings, wherein the A-phase motor and the C-phase motor share a group of switch tubes and a group of diodes; the second main circuit includes an eighth power diode D8, a second electrolytic capacitor C2, and a B-phase motor and a D-phase motor, so The B-phase motor and the D-phase motor both include two groups of switch tubes, two groups of diodes and a group of windings, wherein the B-phase motor and the D-phase motor share one group of switch tubes and one group of diodes. 2.根据权利要求1所述的一种开关磁阻电机不对称半桥功率变换器，其特征在于，所述A相电机包括第一开关管S1、第二开关管S2、第一功率二极管D1、第二功率二极管D2和A相绕阻；2 . The asymmetric half-bridge power converter for switched reluctance motor according to claim 1 , wherein the A-phase motor comprises a first switch S1 , a second switch S2 , and a first power diode D1 . 3 . , the second power diode D2 and the A phase winding; 第一开关管S1的第一端与电源的第一端连接，第一开关管S1的第二端与第一功率二极管D1的负极端连接，第二功率二极管D2的负极端与第一开关管S1的第一端、电源的第一端连接，第二功率二极管D2的正极端与第二开关管S2的第一端连接，第二开关管S2的第二端与第一功率二极管D1的正极端、电源的第二端连接，A相绕阻的第一端与第一开关管S1的第二端、第一功率二极管D1的负极端连接，A相绕阻的第二端与第二开关管S1的第一端、第二功率二极管D1的正极端连接。The first end of the first switch tube S1 is connected to the first end of the power supply, the second end of the first switch tube S1 is connected to the negative end of the first power diode D1, and the negative end of the second power diode D2 is connected to the first switch tube The first end of S1 is connected to the first end of the power supply, the positive end of the second power diode D2 is connected to the first end of the second switch tube S2, and the second end of the second switch tube S2 is connected to the positive end of the first power diode D1 The terminal is connected to the second end of the power supply, the first end of the A-phase winding is connected to the second end of the first switch tube S1 and the negative end of the first power diode D1, and the second end of the A-phase winding is connected to the second switch The first end of the tube S1 and the positive end of the second power diode D1 are connected. 3.根据权利要求2所述的一种开关磁阻电机不对称半桥功率变换器，其特征在于，所述C相电机包括第二开关管S2、第三开关管S3、第二功率二极管D2、第三功率二极管D3和C相绕阻，其与A相电机共用第二开关管S2和第二功率二极管D2；3 . The asymmetric half-bridge power converter for switched reluctance motor according to claim 2 , wherein the C-phase motor comprises a second switch S2 , a third switch S3 , and a second power diode D2 . 4 . , the third power diode D3 and the C-phase winding, which share the second switch tube S2 and the second power diode D2 with the A-phase motor; 第三开关管S3的第一端与电源的第一端、第一开关管S1的第一端、第二功率二极管D2的负极端连接，第三开关管S3的第二端与第三功率二极管D3的负极端连接，第三功率二极管D3的正极端与第二开关管S2的第二端、第一功率二极管D1的正极端、电源的第二端连接，C相绕阻的第一端与绕阻A的第二端、第二功率二极管D2的正极端、第二开关管S2的第一端连接，C相绕阻的第二端与第三开关管S3的第二端、第三功率二极管D3的负极端连接。The first end of the third switch S3 is connected to the first end of the power supply, the first end of the first switch S1, and the negative end of the second power diode D2, and the second end of the third switch S3 is connected to the third power diode The negative terminal of D3 is connected, the positive terminal of the third power diode D3 is connected to the second terminal of the second switch tube S2, the positive terminal of the first power diode D1, and the second terminal of the power supply, and the first terminal of the C-phase winding is connected to The second end of the winding A, the positive end of the second power diode D2, and the first end of the second switch tube S2 are connected, and the second end of the C-phase winding is connected to the second end of the third switch tube S3, the third power The negative terminal of diode D3 is connected. 4.根据权利要求1所述的一种开关磁阻电机不对称半桥功率变换器，其特征在于，所述B相电机包括第五开关管S5、第六开关管S6、第五功率二极管D5、第六功率二极管D6和B相绕阻；4 . The asymmetric half-bridge power converter for switched reluctance motor according to claim 1 , wherein the B-phase motor comprises a fifth switch S5 , a sixth switch S6 , and a fifth power diode D5 . 5 . , the sixth power diode D6 and the B phase winding; 第五开关管S5的第一端与电源的第一端连接，第五开关管S5的第二端与第五功率二极管D5的负极端连接，第六功率二极管D6的负极端与第五开关管S5的第一端、电源的第一端连接，第六功率二极管D6的正极端与第六开关管S6的第一端连接，第六开关管S6的第二端与第五功率二极管D5的正极端、电源的第二端连接，第五功率二极管D5的正极端与电源的第二端连接，B相绕阻的第一端与第五开关管S5的第二端、第五功率二极管D5的负极端连接，B相绕阻的第二端与第六开关管S6的第一端、第六功率二极管D6的正极端相连。The first end of the fifth switch tube S5 is connected to the first end of the power supply, the second end of the fifth switch tube S5 is connected to the negative end of the fifth power diode D5, and the negative end of the sixth power diode D6 is connected to the fifth switch tube The first end of S5 is connected to the first end of the power supply, the positive end of the sixth power diode D6 is connected to the first end of the sixth switch tube S6, and the second end of the sixth switch tube S6 is connected to the positive end of the fifth power diode D5 The terminal is connected to the second terminal of the power supply, the positive terminal of the fifth power diode D5 is connected to the second terminal of the power supply, the first terminal of the B-phase winding is connected to the second terminal of the fifth switch tube S5, and the second terminal of the fifth power diode D5 The negative terminal is connected, and the second terminal of the B-phase winding is connected to the first terminal of the sixth switch tube S6 and the positive terminal of the sixth power diode D6. 5.根据权利要求4所述的一种开关磁阻电机不对称半桥功率变换器，其特征在于，所述D相电机包括第六开关管S6、第七开关管S7、第六功率二极管D6、第七功率二极管D7和D相绕阻，其与B相电机共用第六开关管S6和第六功率二极管D6；5 . The asymmetric half-bridge power converter for switched reluctance motor according to claim 4 , wherein the D-phase motor comprises a sixth switch tube S6 , a seventh switch tube S7 , and a sixth power diode D6 . 6 . , the seventh power diode D7 and the D-phase winding, which share the sixth switch tube S6 and the sixth power diode D6 with the B-phase motor; 第七开关管S7的第一端与电源的第一端、第五开关管S5的第一端、第六功率二极管D2的负极端连接，第七开关管S7的第二端与第七功率二极管D7的负极端连接，第七功率二极管D7的正极端与第六开关管S6的第二端、第五功率二极管D5的正极端、电源的第二端连接，D相绕阻的第一端与绕阻B的第二端、第六功率二极管D6的正极端、第六开关管S6的第一端连接，D相绕阻的第二端与第七开关管S7的第二端、第七功率二极管D7的负极端连接。The first end of the seventh switch S7 is connected to the first end of the power supply, the first end of the fifth switch S5, and the negative end of the sixth power diode D2, and the second end of the seventh switch S7 is connected to the seventh power diode The negative terminal of D7 is connected, the positive terminal of the seventh power diode D7 is connected to the second terminal of the sixth switch tube S6, the positive terminal of the fifth power diode D5, and the second terminal of the power supply, and the first terminal of the D phase winding is connected to The second end of the winding B, the positive end of the sixth power diode D6, and the first end of the sixth switch S6 are connected, and the second end of the D-phase winding is connected to the second end of the seventh switch S7 and the seventh power The negative terminal of diode D7 is connected. 6.根据权利要求2-5中任一项所述的一种开关磁阻电机不对称半桥功率变换器，其特征在于，每相绕组均包括三种工作模式：励磁模式、零电压续流模式以及退磁模式；具体如下：当上开关管和下开关管均导通时，电源向电机供电，绕组两端承受正电压U，绕组电流上升，此为励磁模式；当上开关管关断而下开关管导通时，绕组两端电压为零，绕组电流经过下开关管和下功率二极管完成通路，绕组电流缓慢下降，此为零电压续流模式；当上开关管和下开关管均关断，绕组两端承受负电压-U，相电流通过下功率二极管D1和上功率二极管D2进行能量回馈，绕组电流快速下降，此为退磁模式；上述为一相供电周期。6. A switched reluctance motor asymmetric half-bridge power converter according to any one of claims 2-5, wherein each phase winding includes three operating modes: excitation mode, zero-voltage freewheeling mode and demagnetization mode; the details are as follows: when the upper switch tube and the lower switch tube are both turned on, the power supply supplies power to the motor, both ends of the winding are subjected to a positive voltage U, and the winding current rises, this is the excitation mode; when the upper switch tube is turned off and the When the lower switch tube is turned on, the voltage across the winding is zero, the winding current passes through the lower switch tube and the lower power diode to complete the path, and the winding current drops slowly. This is a zero-voltage freewheeling mode; when both the upper switch tube and the lower switch tube are turned off If it is disconnected, both ends of the winding are subjected to a negative voltage -U, the phase current is fed back through the lower power diode D1 and the upper power diode D2, and the winding current drops rapidly. This is the demagnetization mode; the above is a one-phase power supply cycle. 7.一种开关磁阻电机不对称半桥功率变换器控制方法，采用如权利要求1-5中任一项所述开关磁阻电机不对称半桥功率变换器，其特征在于，包括三种控制模式，分别为单相励磁模式、双相励磁模式以及单双混合励磁模式；7. A method for controlling a switched reluctance motor asymmetric half-bridge power converter, using the switched reluctance motor asymmetric half-bridge power converter according to any one of claims 1 to 5, characterized in that it comprises three Control modes are single-phase excitation mode, dual-phase excitation mode and single- and dual-mixed excitation mode; 单相励磁模式下，任意时刻只对一相绕组进行励磁，按照A=>B=>C=>D=>A的方式循环；In the single-phase excitation mode, only one-phase winding is excited at any time, and it circulates in the way of A=>B=>C=>D=>A; 双相励磁模式下，同一时刻对处于上升区的绕组进行励磁，按照AB=>BC=>CD=>DA=>AB的方式循环，且相邻两相同时励磁时，将两相绕组的极性设置为相反的极性；In the dual-phase excitation mode, the windings in the rising region are excited at the same time, and the cycle is performed in the manner of AB=>BC=>CD=>DA=>AB, and when two adjacent two-phase windings are excited at the same time, the poles of the two-phase windings are energized at the same time. sex is set to opposite polarity; 双模式运行状态下，启动时采用双相励磁，正常运行时采用单向励磁。In dual-mode operation, dual-phase excitation is used at startup, and unidirectional excitation is used in normal operation. 8.根据权利要求6所述的一种开关磁阻电机不对称半桥功率变换器控制方法，其特征在于，所述双模式运行状态下，在系统运行过程中，不断的检测系统输入电流，当电流大于某个区间时，启动双相励磁模式，当电流下降到某个区间时，启动单相励磁模式，所述区间为滞环式的。8 . The method for controlling an asymmetric half-bridge power converter of a switched reluctance motor according to claim 6 , wherein, in the dual-mode operation state, during the system operation, the system input current is continuously detected, 9 . When the current is greater than a certain interval, the two-phase excitation mode is activated, and when the current drops to a certain interval, the single-phase excitation mode is activated, and the interval is hysteretic.
CN202010460246.2A 2020-05-27 2020-05-27 Asymmetric half-bridge power converter for switched reluctance motor and control method thereof Pending CN111654199A (en)

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Application publication date: 20200911