Digital Control Issue of High Speed Switched Reluctance Motor

Turn-on and turn-off angle greatly affect the electromagnetic torque for switched reluctance motor(SRM), so it is particularly important to optimize these parameters. The high-speed SRM requires the high-frequency in the operation and short response time, which bring some issues, such as the calculation and control of position signal. To address these problems, an online adjustment approach for turn-on and turn-off angle which are beneficial to the performance of high speed SRM. In addition, considering the high changing rate of current and voltage at high-speed, the control system must have excellent anti-interference ability, and some anti-interference measures in the software and hardware are adopted. At last, this paper designs a digital controller for the high-speed switch reluctance motor (SRM) based on DSP TMS320LF2812, including the hardware and software design. The experimental results verify that the proposed on-line adjustment approach and anti-interference measures at the high-speed SRM are feasible. And the tested SRM with an excellent dynamic response can reach 88,000 rpm in short time.