(1) Motor has compact structure, small volume and limited package size, so it must be specially designed according to specific products.

(2) Lightweight, reducing the overall weight of the vehicle. Try to use aluminum alloy shell, and at the same time, the rotating speed should be high, so as to reduce the weight of the whole vehicle, increase the adaptability between the motor and the body, expand the available space of the body, and thus improve the ride comfort.

(3) The reliability is high, and the failure mode is controllable to ensure the safety of passengers.

(4) It provides accurate torque control and good dynamic performance.

(5) High efficiency and high power density. It is necessary to ensure high efficiency in a wide range of speed and torque, so as to reduce power loss and improve the driving range of one charge.

(6) Low cost, thus reducing the production cost of the whole vehicle.

(7) Wide speed regulating range. It should include constant torque area and constant power area, and the constant torque output is large at low speed to meet the requirements of fast start, acceleration and load climbing. High-speed operation output constant power, wide speed range, meet the requirements of high-speed driving such as road leveling and overtaking.

(8) High instantaneous power and strong overload capacity. It is necessary to ensure that the car has an overload capacity of 4~5 times to meet the requirements of accelerating driving and maximum climbing in a short time.

(9) Good environmental adaptability. In order to adapt to the different regional environment where the car itself runs, it can work normally even in harsh environment, and has good high temperature and humidity resistance.

(10) The braking regeneration efficiency is high. When the car slows down, it can realize feedback braking, recover energy and feed it back to the battery, so that the electric car has the best energy utilization rate.

(1 1) others. Simple structure, low price, suitable for mass production, low noise during operation and convenient use and maintenance.

(12) Different from general industrial motors, driving motors for automobiles should have the characteristics of wide speed regulation range, large starting torque, large reserve power and high efficiency. In addition, it also requires high reliability, high temperature resistance, moisture resistance, simple structure, low cost and simple maintenance, and is suitable for mass production. In the future, China's electric vehicle drive motor system will develop in the direction of permanent magnet, digitalization and integration.

Hollis is mainly engaged in the research, development, production and sales of intelligent manufacturing equipment, providing high-end equipment and intelligent factory solutions for the electric drive, electronic control, denso and precision electronics industries of new energy vehicles.