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An open-circuit fault-tolerant control method for a six-phase permanent magnet motor with adjustable torque fluctuation

A technology of torque ripple and open circuit fault, applied in torque ripple control, motor generator control, motor control, etc., can solve problems such as torque derating and torque ripple

Active Publication Date: 2022-07-12
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a six-phase permanent magnet motor with adjustable torque fluctuation in order to solve the problem of balanced compensation of torque derating and torque fluctuation in the face of different power demands of the six-phase permanent magnet motor under an open circuit fault Fault Tolerant Control Method for Open Circuit Fault

Method used

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  • An open-circuit fault-tolerant control method for a six-phase permanent magnet motor with adjustable torque fluctuation
  • An open-circuit fault-tolerant control method for a six-phase permanent magnet motor with adjustable torque fluctuation
  • An open-circuit fault-tolerant control method for a six-phase permanent magnet motor with adjustable torque fluctuation

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specific Embodiment approach 1

[0117] Specific embodiment one: the following combination Figures 1 to 5 The present embodiment will be described. The open-circuit fault tolerance control method for a six-phase permanent magnet motor with adjustable torque fluctuation described in this embodiment is suitable for an open-circuit fault of any one-phase winding of a six-phase permanent magnet motor.

[0118] Taking the open circuit of the A-phase winding as an example, it is explained that when any one-phase winding of the six-phase permanent magnet motor is open-circuited, the open-circuit fault tolerance control method is as follows:

[0119] Adjust the input current of the remaining B, C, D, E, F five-phase windings by pressing

[0120]

[0121] work to improve post-fault torque characteristics;

[0122] In the formula, i' B , i' C , i' D , i' E , i' F are the adjusted currents of the B, C, D, E, and F phase windings, respectively, i B , i C , i D , i E , i F are the average torque current com...

specific Embodiment approach 2

[0147] Specific embodiment two: the following combination Figures 1 to 5 This embodiment will be described. The open-circuit fault tolerance control method for a six-phase permanent magnet motor with adjustable torque fluctuation described in this embodiment is suitable for an open-circuit fault of adjacent two-phase windings of a six-phase permanent magnet motor.

[0148] Taking the open circuit of the A and F-phase windings as an example, it is explained that when the six-phase permanent magnet motor is open-circuited in the adjacent two-phase windings, the open-circuit fault-tolerant control method is as follows:

[0149] Adjust the input current of the remaining B, C, D, E four-phase windings by pressing

[0150]

[0151] work to improve post-fault torque characteristics;

[0152] In the formula, i' B , i' C , i' D , i' E are the adjusted currents of the B, C, D, and E phase windings, respectively, i B , i C , i D , i E are the average torque current components ...

specific Embodiment approach 3

[0177] Specific embodiment three: the following combination Figures 1 to 5 This embodiment will be described. The open-circuit fault tolerance control method for a six-phase permanent magnet motor with adjustable torque fluctuation described in this embodiment is suitable for open-circuit faults of two-phase windings of a six-phase permanent magnet motor.

[0178] Taking the open circuit of the A and B-phase windings as an example, it is explained that when the six-phase permanent magnet motor has an open circuit between the two-phase windings, the open-circuit fault-tolerant control method is as follows:

[0179] Adjust the input current of the remaining C, D, E, F four-phase windings by pressing

[0180]

[0181] work to improve post-fault torque characteristics;

[0182] In the formula, i' C , i' D , i' E , i' F are the adjusted currents of C, D, E, and F phase windings, respectively, i C , i D , i E , i F are the average torque current components of the C, D, ...

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Abstract

A six-phase permanent magnet motor open-circuit fault-tolerant control method with adjustable torque fluctuation belongs to the field of multi-phase permanent magnet motors. Equilibrium compensation for different power demands. The invention can realize balanced compensation of different proportions for the torque fluctuation and average torque of the six-phase permanent magnet motor when an open-circuit fault occurs in one phase, two adjacent phases, two phases apart, and two opposite phases of the motor. Adjust the currents of the remaining phases so that they consist of two parts, the average torque current component and the current component that cancels the torque fluctuation. The torque fluctuation is offset by compensating for the reverse rotating magnetomotive force, and the corresponding value is obtained based on the Lagrange multiplier method. The objective function of , obtains the current component that offsets the torque fluctuation, and adjusts the torque fluctuation of the open-circuit fault motor by adjusting the weight factor to vary between 0 and 1.

Description

technical field [0001] The invention belongs to the field of multi-phase permanent magnet motors, and relates to a fault-tolerant control technology under an open-circuit fault. Background technique [0002] With the rapid development of modern industry, the energy and environmental problems caused by the extensive use of fossil energy have brought great challenges to the sustainable development of society. Compared with traditional fuel vehicles using fossil energy, electric vehicles have the advantages of being resource-friendly and environmentally friendly. It has received extensive attention from academia and industry. Permanent magnet motors are widely used in electric vehicle drive systems due to their advantages in power density and efficiency, while multi-phase permanent magnet motors can achieve fault-tolerant operation when one or more phases fail due to their redundant phase numbers, which is more traditional than traditional permanent magnet motors. Three-phase ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/10H02P6/14H02P6/28H02P21/14H02P21/22H02P29/028
CPCH02P6/10H02P6/14H02P6/28H02P21/14H02P21/22H02P29/028Y02T10/72
Inventor 郑萍苑子航程路明杨士杰尹佐生
Owner HARBIN INST OF TECH