Resolver to digital converter implemented in TMS320F2812 processor
Roman Augustynowicz, Sławomir Mandra, Kazimierz Karwowski · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2006
Resolver measurement position systems indicate an absolute position of rotating machine components like motor shafts or robotic arms. The system consists of the three parts: resolver, hardware interface and decoder. Decoder decodes resolver signals and determines the absolute position. The hardware interface and decoder is called Resolver-to-Digital Converter (RDC). Nowadays, resolver measurement systems in most cases use the silicon ASIC chips or DSP processors able to perform some specific trigonometric and filtering functions required in the demodulation process. This paper presents the results of the experiments of the RDC as well as the theory of operation of the resolver, hardware interface and decoder based on the TMS320F28 12 digital signal processor. As a reference during experiments popular resolver-to-digital conversion ASIC system from Analog Devices AD2S90 and incremental encoder were used. The percentage usage of the processor capacity by the resolver software is reported and several considerations of the possibility to use the processor to perform other tasks in parallel take place.