Hardware Approach of Two Way Conversion of Floating Point to Fixed Point for Current dq PI Controller of FOC PMSM Drive

Mohd. Marufuzzaman, M. B. I. Reaz, M. A. M. Ali, L. F. Rahman


Real time self-automated hardware implementation of current dq PI controller for FOC PMSM is desired. Nevertheless, the controller needs some floating-point calculations, which necessitate expensive computing elements. Moreover, additional bits for implementing arithmetic operations are required for floating point calculation. This research proposed a hardware approach of 64bit floating point to 16-bit fixed-point conversion and vice versa. This conversion method will reduce the bit requirements. Any application which is required 16-bit floating-point calculation can be used this two-way conversion technique. In addition, current dq PI controller uses 16-bit I/O bus. Thus, hardware approach of this two-way conversion is a prerequisite for FPGA realization of current dq PI Controller for FOC-PMSM drive. The outcome of this research is a single chip 16bit to 64bit IEEE 754 standard number format converter for current dq PI controller of FOC-PMSM drive. Ill. 11, bibl. 12, tabl. 1 (in English; abstracts in English and Lithuanian).

DOI: http://dx.doi.org/10.5755/j01.eee.123.7.2382

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