Human-machine interface for switched reluctance motor drive

As a novel type of motor drive with promising prospect, the switched reluctance drive (SRD) has multiple control parameters and flexible control strategies. To control SRD efficiently and conveniently, a human-machine interface (HMI) is needed to set and monitor parameters in different SRD application situations. This paper presents a scheme on designing a HMI for SRD based on microcontroller P89C668. In addition to setting and displaying various operating parameters, the HMI could also control SRD to work in different states and show fault code in the circumstances of malfunction alarm. Asynchronous serial communication is employed in the communication between P89C668 and SRD main controller. Moreover, multi-class menu design is realized in the HMI menu display. Functional characteristics, hardware design, communication protocol and software design of HMI are all introduced in detail. Results of practical application demonstrate that the design scheme is feasible and reliable, and the HMI has achieved the advantages of convenient operation, complete function and reliable working.