Vector-control of induction motor: study of sampling time, switching frequency and output quantization step

This work studies the effect of sampling time, the switching frequency and quantization step on the position performance and efficiency of a vector-control inverter. The sampling time is affected by the computational power of the processing unit. The switching frequency and quantization step are caused by the CPU clock and the PWM frequency of the processing unit. Usually the cost of the processing unit counts as 10-20% of a small inverter for motor control. By being able to reduce the computational power and the PWM frequency, the processing unit can cost be lower and allows cost saving for a vector-control inverter.