Software-based resolver-to-digital conversion and online fault compensation
Chuangqiang Guo, Chunya Wu, Fenglei Ni, Hong Liu · 2016
A simple and cost-effective software-based resolver to digital converter together with a permanent magnet synchronous motor control system were presented. The proposed method incorporates software generation of the resolver carrier and using anti-tangent calculation for synchronous demodulation of the resolver outputs signal in such a way that there is a substantial savings on hardware like the costly carrier oscillator and associated digital and analog circuits for amplitude demodulators. And the faults of amplitude imbalance and imperfect quadrature of resolver signal can also be detected and compensated by software online. Computer simulation results demonstrate the effectiveness and applicability of the proposed scheme.