Comparison Between High Frequency Sinusoidal Pulsating Voltage and Minimum-Voltage Vector Injection for Sensorless Control of PMSM Drives

The high frequency voltage vector injection has become a study hotspot today because its outstanding performance in rotor position estimation of permanent magnet synchronous machine (PMSM) at low or zero speed. However, the comparison between high frequency sinusoidal pulsating voltage injection (HFSI) and minimum-voltage vector injection (MVVI) method have not been carry out. The principle of this tow HF voltage vector injection methods are deliberated in detail in this paper. And the influence of inverter dead-time, the bandwidth analysis of sensorless control system and the cross coupling magnetic saturation effects are detailed discussed and comparison too. The experiments that compare tow methods performance are implemented at the 1.5kW PMSM test system.