A Motor Design Based on Wireless Magnetic Resonance Coupling Technology

A major challenge of motor design for applications like electric vehicle and aircrafts is to make it light weight. Conventionally electric motors are mailnly made of an iron core, thick wire windings and a magnet. This paper proposes a novel motor design in which magnetic resonance coupling (MRC) of multiphase coils are used for wireless resonant power transfer of energy from a stator multiphase coils to a rotor multiphase coils through large airgaps to create an electromechanical energy at the rotor side. The machine is similar to an induction machine but has added capacitors that creates resonance for efficient electromechanical energy conversion. The motor inductances, coils coupling factor, characteristic torque and resonance conditions are all modelled analytically. FEA analysis of a single pair and two pole pair type of the motor is conducted in this study. Both cores for stator windings and rotor windings are of fiber plastics with no magnet or magnetic iron cores are used.