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| Phase Current Sampling Reconstruction for Inverter |
| Chu Jianbo, Hu Yuwen, Huang Wenxin, Yang Jianfei |
| Nanjing University of Aeronautics and Astronautics Nanjing 210016 China |
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Abstract In the closed-loop control program of inverter control, the motor phase current sampling is a core part. In this paper three-phase current measurement using only a single current sensor in the inverter dc link is proposed based on the relationships among the phase current, DC bus current and inverter switch states. It can minimize the number of current sensors, reduce sensor cost, weight, and volume. The new single current sensor algorithm can solve the difficulty in three-phase current reconstruction by space voltage vector phase-shifting. Simulation and experimental results show that the method is effective and correct.
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Received: 29 September 2009
Published: 04 March 2014
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2010, Vol. 25 
