A High-Precision and High-Efficiency PMSM Driver Based on Power Amplifiers and RTSPSs

A novel topology based on linear power amplifiers (PAs) and real-time sinusoidal voltage-adjustment supply systems (RTSPSs) for a permanent magnet synchronous motor (PMSM) drive system is proposed in this article. Here, PAs are applied to achieve high-precision control minimize the torque ripple harmonic loss caused by nonlinearities of inverter traditional space vector pulsewidth modulation. Meanwhile, order improve conversion efficiency PAs, dc replaced RTSPSs, which wide-band-gap devices. The experimental results show that increased from 58.88% 79.25% fluctuation speed at given 2 r/min reduced 27 0.5 r/min.