Home / News / Company News
Company News
What are the performance requirements of electric vehicle motors?
Visit:200 Date:2018-09-28
In this era of rising traffic, the main role of electric vehicle motors is to generate drive torque. As a power source for electric vehicles, what are the performance requirements of electric motor motors? The following is related to the motor manufacturer Lihui Xiaobian. Learn about

Automotive motor

Cars need high torque at low speeds or climbs, and low torque at high speeds. The main requirements for electric motor motors can be summarized as follows:

High voltage

To the extent permitted, high voltages can be used as much as possible to reduce the size of the motor and the size of the equipment such as wires, and in particular to reduce the cost of the inverter. The operating voltage is increased from 274 V for THS to 500 V for THS B; with the same dimensions, 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 systems is extremely beneficial to the improvement of vehicle dynamic performance.

2. High speed

The speed of the induction motor used in electric vehicles can reach 8 000 to 12 000 r/min. The high-speed motor has a small volume and light weight, which is conducive to reducing the quality of equipment for loading.

3. Light weight and small size

The motor can be used to reduce the quality of the motor by means of an aluminum alloy casing, etc. The materials of various control devices and cooling systems should also be made of lightweight materials. Electric vehicle drive motors require high specific power (output per unit mass of motor) and high efficiency over a wide range of speeds and torques to reduce vehicle weight and extend range; industrial drives Motors are generally considered for power, efficiency and cost, optimizing efficiency around the rated operating point

4. The motor should 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, braking and so on. The motor should have an automatic speed control function to reduce the driver's steering strength, improve driving comfort, and achieve the same control response as the engine's accelerator pedal.

5. Electric vehicle drive motor needs 4 to 5 times overload to meet the requirements of short-time acceleration and maximum grade, while industrial drive motors only require 2 times overload.

6. Electric vehicle drive motor should have high controllability, steady-state accuracy and dynamic performance to meet the coordinated operation of multiple motors, while industrial drive motors only need to meet certain specific performance.

7. The motor should have high efficiency, low loss, and can perform braking energy recovery when the vehicle is decelerating.

8. The safety of the electrical system and the safety of the control system should meet the relevant standards and regulations. Various power battery packs and motors for electric vehicles can operate at voltages above 300 V, so high-voltage protection devices must be equipped to ensure safety.

9. Ability to work reliably under harsh conditions. The motor should have high reliability, temperature and moisture resistance, and low noise during operation, and can work in a harsh environment for a long time.

10. Simple structure. Suitable for mass production, easy to use and maintain. Cheap price, etc.

CopyRight © 2018 Shenzhen Xingnengli Hardware Co., Ltd. All Right Reserved. 粤ICP备2023129895号