A Method of Speed Measurement for Servo Motor Drive with Sinusoidal Quadrature Encoder
Kehui Ji, Wenqi Lu, Jing Zhao Yang · 2016
This paper presents a novel interpolation method for sinusoidal quadrature encoder. By this method, the servo motor drive system can receive both sin and cosine wave signals and convert them to high- resolution pulses train and can calculate the rotor position by counting these pulses and furthermore the speed. The method includes the approximate- linear function calculation and the interval division algorithm. It can be easily implemented in the system to achieve high precision and anti- jamming in the speed calculation with little extra computational resource and no additional hardware expense. The proposed method is implemented and verified with the experiments.