Operating Limits of Inverter-Driven Permanent Magnet Motor Drives

摘要: Recent developments of high-energy permanent magnet (PM) materials such as neodymium-iron-boron have focused attention on the use PM synchronous motors supplied from inverters for a wide variety speed control applications. motor drives are readily applicable where full torque is required up to or base speed. They are, however, limited in their ability operate power-limited regime available reduced increased above its value. In contrast with field weakening approach used dc drives, permanent. The torque-speed operating limits conventional design explored, and then measures which can substantially extend operation into proposed. A trade-off between low speed-torque limit extent range achieved by variations dimensions depth inset magnets rotor iron. Experimental results presented two different design, each using neodymium current-controlled inverter hysteresis current waveshape.