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| A Novel PMSM Near Space Vector Fault Tolerant Combination Strategy Based on Five-Phase Current Source Inverter |
| Chen Chao1,2, Chen Zhen1,2,3, Zhao Jing1,2, Gao Congzhe1,4, Liu Xiangdong1,4, Liao Xiaozhong1,4 |
1. School of Automation Beijing Institute of Technology Beijing 100081 China;
2. Key Laboratory of Drive and Control of Servo Motion System Ministry of Industry and Information Technology Beijing 100081 China;
3. Zhongshan Research Institute Beijing Institute of Technology Zhongshan 528437 China;
4. State Key Laboratory of Intelligent Control and Decision for Complex SystemsBeijing 100081 China |
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Abstract With the development of society, the reliability requirements of motor drive systems in ships, satellites, electric vehicles and other fields are increasing. Compared with the motor body, the driver is more prone to open circuit failure, which makes the research on open-circuit fault-tolerant strategies has attracted more and more attention. Based on the five-phase current source PMSM drive system, this paper proposes a near space vector fault-tolerant combination strategy for the open circuit failure of the drive. According to the characteristics of space current vector amplitude and phase, combined with the principle of vector control, the algorithm selects the nearest space current vector for target current vector synthesis under the condition of open-circuit fault to realize the stable control of electromagnetic torque and maintain the smooth operation of the motor. The algorithm is simple and convenient, which solves the problem of the non-fixed switching frequency in the fault-tolerant control strategy for the traditional voltage source drive system and improves the system stability. Simulation experiments show that under fault conditions, this fault-tolerant strategy can effectively achieve the goal of the motor continuing to run smoothly.
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Received: 09 December 2019
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2020, Vol. 35 
