时间:2022-09-27
1. The driving motor of electric vehicles needs to have 4 to 5 times of overload to meet the requirements of short-term acceleration and maximum slope climbing, while the industrial driving motor only requires 2 times of overload.
2. The electric vehicle driving motor should have high controllability, steady-state accuracy and dynamic performance to meet the coordinated operation of multiple motors, while the industrial driving motor is only required to meet a specific performance.
3. The motor should have high efficiency, low loss, and can recover braking energy when the vehicle slows down.
4. The safety of electrical system and control system shall meet the relevant standards and regulations. The working voltage of various power batteries and motors of electric vehicles can reach more than 300 V, so it is necessary to equip high-voltage protection equipment to ensure safety.
5. Able to work reliably under harsh conditions. The motor should have high reliability, temperature and moisture resistance, low noise during operation, and be able to work in harsh environment for a long time.
6. Simple structure, suitable for mass production of cattle, easy to use and maintenance. The price is cheap, etc.
7. High voltage. In the allowed range, as far as possible to use high voltage, can reduce the size of the motor and wire and other equipment size, especially can reduce the cost of inverter. The working voltage is increased from 274 V of THS to 500 V of THS B; Under the condition of constant size, the maximum power is increased from 33 kW to 50 kW, and the maximum torque is increased from 350 N"m to 400ON"m. It can be seen that the application of high voltage system is very beneficial to the improvement of vehicle dynamic performance.
8. High speed. The speed of induction motor used in electric vehicles can reach 8 000 -12 000 R /min. The volume of high speed motor is small and the weight is light, which is conducive to reducing the quality of equipment loaded.
9. Light weight and small size. The quality of the motor can be reduced by using aluminum alloy shell and other ways. The materials of various control devices and cooling systems should also be selected as light materials as possible. The electric vehicle driving motor requires high specific power (motor output power per unit mass) and high efficiency in a wide range of speed and torque, in order to reduce the weight of the vehicle, extend the driving range; The industrial drive motor usually compares the power, efficiency and cost to take a comprehensive consideration, and the efficiency is optimized near the rated operating point.
10. The motor shall have a large starting torque and a wide range of speed regulation performance to meet the power and torque required for starting, accelerating, driving, decelerating and braking. The motor should have automatic speed regulation function to reduce the driver's control intensity, improve the driving comfort, and can achieve the same control response as the accelerator pedal of internal combustion engine vehicle.