Implementation of Input Capture Method on Switched Reluctance Motor to Obtain Precise Commutation Signals

Switched Reluctance Motor (SRM) is one of the modern electric motors. It has some advantages, such as high speed and low maintenance costs. To operate this motor, a microcontroller and rotor positioning sensor is required. Photo-electric transducer often used for determining rotor position. This sensor is installed at the end of motor shaft, with a rotary disk simultaneously. However, due to manual installation process, the photoelectric transducer could not give a precise signal. It also affects the commutation signals. As a solution to this problem, a new method has been developed. In this paper, the implementation of input capture on the dsPIC30F4012 microcontroller will be explained. By utilizing the input capture facility on dsPIC30F4012, commutation signals will be produced more precise and more stable.