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Vol. 160, Issue 12, December 2013, pp. 547-555

 

Bullet

 

A Kind of Fault-Tolerant Strategy for Asynchronous Motor Vector Control Current Sensor Failure
 
1 Zhang LIWEI, 1 Huang XIANJIN, 1 Yang YANNAN, 1 Xu CHEN, 2 Liu JIE

1 School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China

2 State Key Laboratory of Automotive Simulation and Control, Jilin University, Jilin 130022, China

 

Received: 18 September 2013   /Accepted: 22 November 2013   /Published: 30 December 2013

Digital Sensors and Sensor Sysstems

 

Abstract: The performance of modern motor system is more and more perfect, and the corresponding control algorithm is more and more complex, so t he inevitable various of faults will happen, when Asynchronous motor in the long running process. Its need to take certain fault-tolerant method to guarantee operators' safety, and make the asynchronous motor maintain the normal operation. The three phase current sampling of asynchronous motor vector control is very important to the motor drive system. The actual current sampled by current sensor feedback to the input, and control of motor speed and torque changes for real-time. Usually use two current sensors to sample two phase current, and the third phase current is obtained by calculation. This article will use the acquisition of DC bus current to refactoring three phase current when a current sensor failure, and adopt a certain strategy to revise the three phase current. Finally, verify the validity of the control strategy through Matlab simulation.

 

Keywords: Electric drive system, Fault-tolerant control, Refactoring phase current.

 

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