Highspeed PM-Synchronmotor mit modularem SMC-Statorkonzept

Due to their high-torque density, water-cooled PM-synchronous motors are increasingly used for high-speed drives. They are an integral part of the aggregate in form of a built-in motor. High operating speeds as well as the available power electronics often lead to 2‑pole motor designs. Measures must also be taken to limit iron losses at high speeds. An alternative to low-loss electric sheet steel is the use of SMC materials which are also suitable for a modular stator concept. The layout of the stator winding as a tooth-coil winding is a basic requirement for a modular stator concept. With 2‑pole stators, the classic fractional slot tooth-coil windings are unfortunately omitted. One solution is the single-coil winding which can also be converted into a tooth-coil winding. The chosen modular stator concept consists of an SMC yoke cylinder and discrete tooth-coil elements in which SMC teeth are located as inlay. Using the example of a PM-synchronous motor, a sample motor is designed and manufactured for experimental testing. The test is carried out in direct comparison to a second sample motor which is conventionally manufactured with a stator core made of NO20 electric sheet steel. The test confirms the simulation results and shows that single-coil windings and SMC materials can be used meaningfully in 2‑pole high-speed PM-synchronous motors and are suitable for a modular stator concept.