MOTOR BRIVE TECHNOLOGIES FOR THE POWER-BY-WIRE (PBW) PROGRAM - OPTIONS, TRENDS AND TRADEOFFS .1. MOTORS AND CONTROLLERS

The Power-By-Wire (PEW) program involves the replacement of hydraulic and pneumatic systems currently used in aircraft with an all-electric secondary power system. One of the largest loads of the all-electric s econdary power system will be the motor loads which include pumps, com pressors and Electrical Actuators (EAs). Issues of improved reliabilit y, reduced maintenance and efficiency, among other advantages, are the motivation for replacing the existing aircraft actuators with electri cal actuators. The EA system contains the motor, the power electronic converters, the actuator and the control system, including the sensors . This paper and a companion paper [1] give a comparative literature r eview in motor drive technologies, with a focus on the trends and trad eoffs involved in the selection of a particular motor drive technology . The reported research comprises the induction motor (IM), the brushl ess de motor (BLDCM) and the switched reluctance motor (SRM) drive tec hnologies. Each of the three drives has the potential for application in the PEW program. Many issues remain to be investigated and compared between the three motor drives, using actual mechanical loads expecte d in the PEW program.