With ordinary brushless dc motor of electric vehicle 7 difference of brushless dc motor | car driving brushless dc brushless dc motor | new energy car

The electric car is the development trend of auto industry, everyone knows its core principle is to use alternative engine to drive the brushless dc motor cars, electric drive. But you ever think of electric cars to drive brushless dc motor and ordinary brushless dc motor and whether the same? The answer is definitely no, compared with the routine use of sensor brushless dc motor, electric cars, whether in the brushless dc motor performance requirements and have great differences on the driving principle: 1, should have brushless dc motor of electric vehicle, large starting torque, good startup performance and good speed performance to meet the electric car is frequent start-stop, deceleration, or climbing a hill. Reflect on the brushless dc motor testing, is the requirement for brushless dc motor speed or torque control, shorter response time. Step change in the external load at the same time, a reflection of brushless dc motor itself to fast enough, adjust the output power and speed; 2, brushless dc motor car of brushless dc motor should be designed to be relatively wide constant power range, in order to satisfy the high speed electric cars torque output, to ensure that the car can achieve maximum speed; 3, electric vehicles should have a larger range of brushless dc motor speed regulation, large torque when it is in low speed, high power when it is at a high speed, can according to the needs of driving, adjust the speed of electric vehicles and the corresponding driving force; 4, electric cars, the efficiency of the brushless dc motor should have good features, in a wide range of speed/torque and obtain the optimal efficiency, improve the continued after a charge mileage, general requirements in a typical driving cycle, the efficiency of 85% ~ 93%; 5, the shape of the brushless dc motor of electric vehicle size as small as possible, the quality as light as possible, power density optimization; 6, the electric car reliability of brushless dc motor should have good heat resistance and moisture resistance is strong, able to work for a long time under a harsh environment, running low noise, easy maintenance; 7, combined with the brushless dc motor controller can effective recovery of braking energy. This article is from the electronics world.