Simulation of an ingenious digital controller for a 6/4 pole switched reluctance motor

This paper discusses the process of designing a digital controller for a 6/4 switched reluctance motor (SRM) using VHDL. SRM is gaining importance nowadays as the high RPM of the motor plays a vital role in applications such as hard disk drive motors where high speed is necessary. Designing a controller for such a motor needs the aid of a processor, which has flexibilities in design and high speed in operation. FPGA provides the solution for the above requirement, as it is compact in size and micro programmed in logic. VHDL is very high-speed integrated circuits hardware descriptive language and is used for defining the functionalities of different modules of the controller. By implementing the controller in FPGA, PWM waveforms can be generated from the kit, which is used to drive the gate of the converter circuit. Most of the controllers, which are in use, occupy lot of space and consume a considerable amount of energy. The digital controller presented here has all its algorithms packed in a single chip, which makes the design easy. In this paper both sensor based and indirect control techniques are discussed.