Single phase, single slot tubular permanent magnet linear motor for Stirling cryocooler —design and operation

A single phase, single slot permanent magnet linear motor is designed and operated. It is a type of moving coil linear motor, with a view to achieve optimization in terms of input power, copper losses and efficiency of operation. The equations governing the motion and electrical circuit are written to obtain the electrical parameters. The optimization of magnetic circuit is achieved through electromagnetic simulation to reduce the flux leakage. It is required to optimize the coil length in order to fully utilize the magnet flux in the air gap. After accomplishment of design, the linear motor is used in the dual-opposed Stirling cryocooler and operating well.