Radial Force Control of a Switched Reluctance Motor with Two-Phase Sinusoidal Excitations

[[abstract]]Due to its special structure, the shaft radial force and torque of switched reluctance motor can be separately controlled by proper selection of pole currents. When all the pole currents are controlled independently, it is possible to produce the required radial force to cancel the existing radial force caused by non-uniform air gap or external load, and consequently motor vibrations can be reduced. In this paper, a radial force control scheme which use single or two phase sinusoidal excitations for 12/8 pole SRM is proposed. The pole currents of the conduction phase are energized with phase-shifted sinusoidal currents. Depending on the requested radial force and motor torque, the phase with descending-inductance may also be energized to increase radial force production. The requested force and torque are synthesized from the force and torque produced by these phases. The proposed scheme was verified with finite-element analysis and experiments[[conferencetype]]國際[[conferencedate]]20061008~20061012[[conferencelocation]]Tampa, United State

Loss-minimization control of vector-controlled induction motor drives

[[abstract]]It is well known that the efficiency of induction motor drives under partial load can be improved via manipulation of its field. Among the numerous loss-minimization schemes proposed previously, the scheme that uses motor power factor as the main control variable has the advantages of high sensitivity and ease of implementation. But the problem of how the optimal power factor commands can be generated is not well documented. In this paper, a scheme that uses power factor control with automatic measurement of the minimum-loss power factor commands is proposed. A fuzzy logic compensator is included in the controller to improve the accuracy of the generated commands. The scheme is simple for implementation and does not require an a priori knowledge of motor parameters. Experimental results have validated the effectiveness of this scheme to minimize the motor operating losses[[notice]]補正完畢[[conferencetype]]國際[[conferencedate]]20011022~20011025[[iscallforpapers]]Y[[conferencelocation]]Denpasar, Indonesi