Compensation of dead-time effect of speed sensorless vector control system |
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Authors: | XlA Chaoying ZHANG Jing |
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Affiliation: | XIA Chaoying,ZHANG Jing (School of Electrical Engineering and Automation,Tianjin University,Tianjin 300072,China) |
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Abstract: | The key of speed sensorless vector control system lies in the accurate orientation of magnetic field. In some field-oriented algorithms, the integrator of observers and the dead-time effect bring in system errors during the estimation of field position. In this paper, a saturated feedback integrator is used, and the dead-time effect is compensated by current positive feedback. Experiments were carried out on the hardware platform of MCK2407, with chip TMS320LF2407 from TI Company. The results show that the proposed method is simple and effective, and the accuracy of field position is improved. |
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Keywords: | induction motor speed sensorless vector control DSP compensation dead-time field orientation |
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