Analysis of performance improvement of permanent magnet synchronous drive motor for new energy vehicles
The effects of magnetic properties of permanent magnet materials, rotor structure, armature winding mode and control strategy on the performance of permanent magnet synchronous drive motor are analyzed. The NdFeB rare earth permanent magnet material with high remanence induction, high intrinsic coercive force and high maximum magnetic energy product is selected, and an embedded permanent magnet steel rotor with good steady state performance and high power density is used. High-slot full rate, low copper consumption, small cogging torque, small-slot concentrated winding and direct torque weakening speed control strategy. The optimal design method for improving the performance of permanent magnet synchronous drive motor for new energy vehicles is given.
introduction
At present, there is a serious shortage of energy in the world. The ecological environment has deteriorated drastically, environmental protection issues have become increasingly prominent, and the development of a low-carbon economy is imminent. New energy vehicles have become the most highly regarded emerging industries in the global energy conservation and environmental protection fields. The improvement of automotive electrification technology has attracted more attention. And as a hybrid motor and pure electric car "engine" drive motor. It becomes a core component directly related to the performance of new energy vehicles and energy saving and emission reduction. The permanent magnet synchronous drive motor has high power density, high efficiency, small ripple torque and wide range of weak magnetic speed regulation. It is the best choice for energy-saving and environmentally friendly new energy vehicle drive motors. In order to better play the value of permanent magnet synchronous drive motor, this paper continues to break through the bottleneck of permanent magnet material research, optimize motor structure design, improve the performance of permanent magnet synchronous drive motor, and promote the development of new energy vehicles.
