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access icon openaccess Implementation of maximum efficiency control for matrix-converter-based interior permanent magnet synchronous motor drive systems

An implementation of an online maximum efficiency control for matrix-converter-based interior permanent magnet synchronous motor drive systems is proposed. A simplified efficiency model of the drive system is established first; as a result, detailed models of the matrix-converter loss and motor loss are not required. Next, an algorithm that calculates the steepest ascent to maximum efficiency is proposed. By identifying the maximum efficiency operating point, the efficiency of the whole drive system can be significantly improved based on the simplified efficiency model. A digital signal processor TMS320LF2407A and a complex programmable logic device EMP570GT100C4 are used as a control centre to execute the phase commutation, closed-loop speed control method, current regulating method, and maximum efficiency control method. Experimental results can validate the theoretical analysis and demonstrate the feasibility and correctness of the proposed method.

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http://iet.metastore.ingenta.com/content/journals/10.1049/joe.2018.0120
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