Work place: Wuhan Institute of Technology, Wuhan, China
Research Interests: Computational Engineering, Engineering
Zicheng Li was born in Hubei Province, China, in 1977. He received the B.E. degree in automation in 1999 from Wuhan Institute of Technology, Wuhan, China, and the M.E. and Ph.D. degrees in electrical engineering in 2004 and 2010, respectively, from Huazhong University of Science and Technology, Wuhan, China. Since 2010, he has been an Associate Professor at Wuhan Insititue of Technology, China. His research interests are in the areas of integrated computer control and Power electronics and motion control.
DOI: https://doi.org/10.5815/ijitcs.2011.05.07, Pub. Date: 8 Nov. 2011
A brushless DC(BLDC) motor with the characteristics of high speed and high power density has been more widely used in industrial area. The BLDC motor requires the position and speed sensors for control. However the position sensors are undesirable from standpoints of size, cost, maintenance and reliability. There are some different ways that can solve this problem, depending on the flux distribution. This paper describes a control system of sensorless BLDC motor. The back-EMF is adopted to detect the rotor position. The back-EMF is very small in the motor starting process, and it is difficult to obtain rotor position efficiently. A re-setting method of the rotor is proposed in the paper, and current closed loop is used for high-speed and safety in the motor starting process. A good speed and current double closed loops system is designed. The speed and current regulators are implemented by a digital signal processor(DSP). A simple algorithm is used to calculate motor speed indirectly by the software, which simplifies the system hardware structure. The hardware structure and software design of sensorless BLDC motor control system are described in details. The simulation and experimental results have shown the validity of the sensorless control system and the accuracy of the detective position signal obtained.[...] Read more.
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