Research on braking technology of permanent magnet synchronous motor of new energy vehicle
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Xinyu Sun, Hu Jiahui
The permanent magnet synchronous motor (PMSM) of new energy vehicles has such superior characteristics as relatively high working efficiency, relatively high torque/inertia ratio, relatively high energy density, environmental protection and energy saving, so it is of great significance to the research of PMSM braking technology. Because the motor is running process will be affected by some disturbances, the speed of the motor deviates from the original rated speed, so we pass based on the analysis of the mathematical model, we put the motor rotation speed deviation rate and rotation speed deviation e DE/dt is as the input variables to make the system automatically adjust the motor speed to keep them at rated speed, not only has rapid response speed, no overshoot amount and immunity performance is good, can better improve the permanent magnet synchronous motor speed control system of dynamic and static characteristics, but also in the interference of nonlinear factors on the system has a certain inhibitory effect.
Permanent Magnet Synchronous Motor, Speed Regulating System, Fuzzy Pi Braking, Inverter Circuit