Improved Initial Rotor Angle Detection for Vector Controlled Permanent Magnet Synchronous Motor with Incremental Encoder

This paper presents improvement for the alignment of the rotor of permanent magnet synchronous motor equipped with incremental encoder during start-up of the motor. Proposed improvement allows easier transition to real rotor position angle detection from encoder signal and more precise field-oriented control implementation. Rotor alignment in the known position is achieved faster without vibration. Improvements allow easier transition to field-oriented control algorithm. Experimental results confirm that the method can be implemented in the microcontroller that controls the inverter.