阅读说明：本技术 一种双绕组永磁同步电机控制拓扑 (Double-winding permanent magnet synchronous motor control topology ) 是由 闫浩 王光秋 于 2021-11-08 设计创作，主要内容包括：一种双绕组永磁同步电机控制拓扑,涉及双绕组永磁同步电机控制技术,发明针对双绕组无刷直流电机的控制系统,提出一种电路拓扑,可以实现两套绕组同时工作,或实现任何一套绕组单独工作,达到提高电机系统容错能力的目的,它包括两套三相绕组,第一套三相绕组由左侧逆变器进行控制、第二套绕组由右侧逆变器进行控制；所述左侧逆变器包括六个电力电子开关,分别命名为：Q1、Q2、Q3、Q4、Q5和Q6；右侧逆变器包括六个电力电子开关,分别命名为：Q7、Q8、Q9、Q10、Q11和Q12；两套三相绕组采用星型联结方式连接。(The invention relates to a control topology of a double-winding permanent magnet synchronous motor, which relates to the control technology of the double-winding permanent magnet synchronous motor, provides a circuit topology aiming at a control system of a double-winding brushless direct current motor, can realize the simultaneous work of two sets of windings or the independent work of any set of windings, and achieves the purpose of improving the fault-tolerant capability of a motor system; the left inverter includes six power electronic switches, named respectively: q1, Q2, Q3, Q4, Q5 and Q6; the right inverter includes six power electronic switches, respectively named: q7, Q8, Q9, Q10, Q11 and Q12; the two sets of three-phase windings are connected in a star connection mode.)

1. A double-winding permanent magnet synchronous motor control topology is characterized in that: the first set of three-phase windings are controlled by a left inverter, and the second set of windings are controlled by a right inverter; the left inverter includes six power electronic switches, named respectively: q1, Q2, Q3, Q4, Q5 and Q6; the right inverter includes six power electronic switches, respectively named: q7, Q8, Q9, Q10, Q11 and Q12;

the two sets of three-phase windings are connected in a star connection mode, and the three-phase windings are correspondingly named in number: a1, B1, C1, a2, B2 and C2.

2. A double winding permanent magnet synchronous machine control topology according to claim 1, characterized in that said double winding permanent magnet synchronous machine control topology further comprises two high current contactors, namely: a first high-current contactor S1 and a second high-current contactor S2; and the first large-current contactor S1 and the second large-current contactor S2 are respectively installed on direct-current buses of the two inverters and are used for realizing the on-off of a circuit.

3. A double winding permanent magnet synchronous machine control topology according to claim 2, characterized in that said double winding permanent magnet synchronous machine control topology further comprises three high current contactors, namely: a third large current contactor Sa, a fourth large current contactor Sb and a fifth large current contactor Sc;

and the third large-current contactor Sa, the fourth large-current contactor Sb and the fifth large-current contactor Sc are correspondingly arranged between the phases of the two sets of windings and are all used for realizing the on-off of the circuit.

4. A double winding pmsm control topology according to claim 3, wherein the dc power source Vdc for the inverter may be the same or two separate dc power sources.

5. The dual-winding PMSM control topology of claim 4, wherein the first mode of operation of said dual-winding PMSM control topology is:

the two sets of windings work simultaneously, the first large-current contactor S1 and the second large-current contactor S2 are both closed, the third large-current contactor Sa, the fourth large-current contactor Sb and the fifth large-current contactor Sc are all opened, the two sets of windings are mutually independent, power is supplied by corresponding inverters respectively, the two sets of windings work together to enable the motor to run, and at the moment, the motor is in a full-power running mode.

6. The dual-winding PMSM control topology of claim 4, wherein the second mode of operation of said dual-winding PMSM control topology is:

two sets of windings work simultaneously, contactors S1 and S2 are closed, a third large-current contactor Sa, a fourth large-current contactor Sb and a fifth large-current contactor Sc are closed, the two sets of windings are connected together and are equivalent to a three-phase motor, and at the moment, two inverters work simultaneously and are in a full-power running mode of the motor.

7. The dual-winding PMSM control topology of claim 4, wherein a third mode of operation of said dual-winding PMSM control topology is:

if the left inverter or the motor winding has a fault, the first large-current contactor S1, the third large-current contactor Sa, the fourth large-current contactor Sb and the fifth large-current contactor Sc are disconnected, the second large-current contactor S2 is closed, only the right inverter drives the right winding to work, and the motor is in a half-power running mode at the moment.

8. The dual-winding PMSM control topology of claim 4, wherein a fourth mode of operation of said dual-winding PMSM control topology is:

if the right inverter or the motor winding has a fault, the second large-current contactor S2, the third large-current contactor Sa, the fourth large-current contactor Sb and the fifth large-current contactor Sc are disconnected, the first large-current contactor S1 is closed, only the left inverter drives the left winding to work, and the motor is in a half-power running mode at the moment.

9. The dual-winding PMSM control topology of claim 4, wherein the fifth mode of operation of said dual-winding PMSM control topology is:

if only the left inverter fails and the motor winding does not have a fault, the first large-current contactor S1 is disconnected, and the first large-current contactor S2, the third large-current contactor Sa, the fourth large-current contactor Sb and the fifth large-current contactor Sc are closed, so that the right inverter drives two sets of windings to work simultaneously, and the motor runs in a full-power mode.

10. The dual-winding PMSM control topology of claim 4, wherein the sixth mode of operation of said dual-winding PMSM control topology is:

if only the right inverter fails and the motor winding does not have a fault, the second large-current contactor S2 is disconnected, the first large-current contactor S1, the third large-current contactor Sa, the fourth large-current contactor Sb and the fifth large-current contactor Sc are closed, and at the moment, the left inverter drives two sets of windings to work simultaneously, and the motor runs in a full-power mode.

Technical Field

The invention relates to a control technology of a double-winding permanent magnet synchronous motor.

Background

The permanent magnet synchronous motor has the advantages of high power density and light weight, is widely applied to the fields of new energy automobiles, servo control, aerospace and the like, and adopts a double-winding structure in some occasions in order to improve the reliability of the motor, namely, one winding can be replaced to the other winding after a fault occurs, and the fault-tolerant operation capability of a motor system can be effectively improved by the backup mode. The double-winding permanent magnet synchronous motor can only operate by supplying power by two independent voltage source inverters, so that the control topology of the double-winding permanent magnet synchronous motor needs to be designed, on one hand, two sets of windings can work simultaneously, and on the other hand, any one set of windings in the two sets of windings can work independently.

Disclosure of Invention

The invention provides a circuit topology aiming at a control system of a double-winding brushless direct current motor, which can realize the simultaneous work of two sets of windings or the independent work of any one set of windings, thereby achieving the purpose of improving the fault-tolerant capability of a motor system.

The topological structure is as follows: a double-winding permanent magnet synchronous motor control topology is characterized in that: the first set of three-phase windings are controlled by a left inverter, and the second set of windings are controlled by a right inverter; the left inverter includes six power electronic switches, named respectively: q1, Q2, Q3, Q4, Q5 and Q6; the right inverter includes six power electronic switches, respectively named: q7, Q8, Q9, Q10, Q11 and Q12;

the two sets of three-phase windings are connected in a star connection mode, and the three-phase windings are correspondingly named in number: a1, B1, C1, a2, B2 and C2;

the beneficial effects obtained by the invention are as follows: the control topology can realize fault-tolerant operation of the double-winding permanent magnet synchronous motor in various fault states, and can improve the reliability of a motor system.

Drawings

Fig. 1 is a schematic diagram of a control topology of a dual-winding permanent magnet synchronous motor.

Detailed Description

In the double-winding permanent magnet synchronous motor control topology provided by the invention patent, two sets of three-phase windings adopt a star connection mode, and the corresponding windings are numbered as a1, B1, C1, a2, B2 and C2. The first set of windings is controlled by the left inverter and the second set of windings is controlled by the right inverter. Vdc is a direct current power supply, Q1, Q2, Q3, Q4, Q5, Q6 are six power electronic switching devices constituting the left-side inverter, and Q7, Q8, Q9, Q10, Q11, Q12 are six power electronic switching devices constituting the right-side inverter. Two large-current contactors S1 and S2 are respectively arranged on direct-current buses of the two inverters, so that the circuit is switched on and off. And large-current contactors Sa, Sb and Sc are also respectively arranged between the phases corresponding to the two sets of windings, so that the on-off function of the circuit is realized.

The dc power supply Vdc for supplying power to the two inverters may be the same or may be two independent dc power supplies.

Working mode 1: the two sets of windings work simultaneously, the contactors S1 and S2 are closed, the third contactor Sa, the fourth contactor Sb and the Sc are opened, the two sets of windings are independent of each other, power is supplied by the corresponding inverters respectively, the two sets of windings work together to enable the motor to run, and at the moment, the motor is in a full-power running mode.

The working mode 2 is as follows: the two sets of windings work simultaneously, the first contactor S1 and the second contactor S2 are closed, the third contactor Sa, the fourth contactor Sb and the fifth contactor Sc are closed, the two sets of windings are connected together to be equivalent to a three-phase motor, and at the moment, the two inverters work simultaneously and are in a full-power running mode of the motor.

Working mode 3: if the left inverter or the motor winding has a fault, the first contactor S1, the third contactor Sa, the fourth contactor Sb and the fifth contactor Sc are disconnected, the second contactor S2 is closed, only the right inverter drives the right winding to work, and the motor is in a half-power running mode at this time.

The working mode 4 is as follows: if the inverter on the right side or the motor winding has a fault, the contactor S2 is opened, the third contactor Sa, the fourth contactor Sb and the fifth contactor Sc are closed, the first contactor S1 is closed, only the inverter on the left side drives the winding on the left side to work, and the motor is in a half-power running mode at the moment.

The working mode 5 is as follows: if only the left inverter fails and the motor winding does not fail, the first contactor S1 is opened, the second contactor S2, the third contactor Sa, the fourth contactor Sb and the fifth contactor Sc are closed, and at the moment, the right inverter drives two sets of windings to work simultaneously, so that the motor is in a full-power running mode.

The working mode 6 is as follows: if only the right inverter fails and the motor winding does not fail, the second contactor S2 is opened, the first contactor S1, the third contactor Sa, the fourth contactor Sb and the fifth contactor Sc are closed, and at the moment, the left inverter drives two sets of windings to work simultaneously, so that the motor runs in a full-power mode.

The control topology can realize fault-tolerant operation of the double-winding permanent magnet synchronous motor in various fault states, and can improve the reliability of a motor system.