PM and PM-Less Motors for Electric Vehicles: A Comparative Analysis

The automotive industry is focusing on developing more efficient and sustainable powertrains in response to the increasing demand for electric vehicles. The benefits and draw-backs of using alternative motor designs, along with the growing trend among motor manufacturers to reduce their reliance on Permanent Magnets are explored by the authors. The analysis includes electromagnetic studies aimed at identifying the operational limits of each type of motor. Specifically, the comparison involves an Interior Permanent Magnet motor, which utilizes NdFeB magnets, and various permanent magnet less motor designs, such as the Electrically Excited Synchronous Motor, the Hybrid Excited Permanent Magnet motor, the Reluctance motor, and the Permanent Magnet assisted Reluctance motor.