Design and Performance of a Microcontroller-Based Switched Reluctance Motor Drive System

A torque control solution for the switched reluctance motor with digital signal processor

“…Second the QEP (Quadrature Encoder Pulse) loop that checks the position and determines the proper rotation direction and proper commutation sequence. QEP loop generates and interrupt after every 15 mechanical degree rotation of rotor [l], [2], [3]. The flowchart of the main program is shown in Fig.4.…”

“…As there is no control of the current and as there is a sharp increase in the rate of change of current, this PWM strategy is used when the amount of time available to get the desired current is short. Typically, single pulse operation is used at high mechanical speed with respect to the turnsn angle determined as a function of speed [l], [2].…”

“…The proposed control scheme is implemented on the TMS320C240. All the control routines are implemented using assembler language with fixed precision numerical representation [I], [2]. The control uses a fixed frequency (set on 25kI-k) symmetrical Pulse Width Modulation.…”