China's automotive motors have obvious comparative advantages under global resource conditions and have great development potential. From the perspective of the new energy vehicle industry chain, the beneficiary side will mainly focus on the core components. The current status of domestic automotive drive motor industry: small industry in the motor industry, but the manufacturing threshold is high, there are still many gaps and shortcomings in the motor drive system, but domestic policy support will accelerate the pace of the industry. As one of the core components of new energy vehicles (battery, motor, electronic control), Figure 1, the drive motor and its control system have a promising future. Introduction to the drive motor system New energy vehicles have three major advantages: environmental protection, economy and simplicity. This is especially true in pure electric vehicles: the electric motor is replaced by a motor and driven by a motor without the need for an automatic transmission. Compared with the automatic transmission, the motor has a simple structure, mature technology and reliable operation. The speed at which a conventional internal combustion engine can efficiently generate torque is limited to a narrow range, which is why a conventional internal combustion engine vehicle requires a large and complicated shifting mechanism; and the electric motor can efficiently generate torque over a relatively wide speed range. There is no need to shift gears during the running of pure electric vehicles, which is easy to operate and low in noise. Compared with hybrid vehicles, pure electric vehicles use a single electric energy source. The electronic control system greatly reduces the internal mechanical transmission system of the automobile, and the structure is simplified, and the energy loss and noise caused by friction of mechanical parts are also reduced, thereby saving the interior space of the automobile. weight. The motor drive control system is the main execution structure in the operation of new energy vehicles. The drive motor and its control system are one of the core components (battery, motor, electric control) of new energy vehicles. The driving characteristics determine the main performance of the car. Indicator, which is an important part of electric vehicles. Fuel cell vehicles FCV, hybrid electric vehicle HEV and pure electric vehicle EV in electric vehicles all use electric motors to drive the wheels. Choosing the right electric motor is an important factor to improve the cost performance of various electric vehicles. Therefore, research and development can improve At the same time, it is extremely important to meet the performance requirements of the vehicle during driving, and to have a motor drive that is durable, low in cost, and high in performance. The drive motor system is one of the three core components of the new energy vehicle. The motor drive control system is the main execution structure of the new energy vehicle. The driving characteristics determine the main performance indicators of the car. It is an important part of the electric car. The entire drive system of an electric vehicle includes two parts, a motor drive system and its mechanical transmission mechanism. The motor drive system is mainly composed of a motor, a power converter, a controller, various detection sensors, and a power supply, and the structure is as shown in FIG. 2 . Motors generally require two functions: electric and power generation. Types of motors such as DC, AC, permanent magnet brushless or switched reluctance can be selected according to the type, as shown in Figure 3. The power converter is in the form of a DC/DC power converter, a DC/AC power converter, etc. according to the selected motor type. Its function is to convert the DC power of the battery to DC and AC of the corresponding voltage level according to the selected motor drive current requirement. Or pulse power supply. The motor is a rotating electromagnetic machine that operates on the principle of electromagnetic induction and is used to convert electrical energy into mechanical energy. The electrical power is absorbed from the electrical system during operation and the mechanical power is output to the mechanical system. The motor drive system is mainly composed of a motor and a controller (inverter). The ratio of the cost of the drive motor and the motor controller is about 1:1. According to the design principle and the classification method, the specific structure and cost of the motor are composed. There are also differences. The control system of the motor mainly adjusts the running state of the motor to meet the requirements of different operating requirements of the whole vehicle. The principle and method of the control system are quite different for different types of motors. Figure 2 Basic block diagram of the motor drive system Figure 3 classification of the motor (according to the principle) Basic requirements for electric motors for drive motors Compare the application, advantages and disadvantages of four common motor drive systems. Weichai Generator Set,Power Genset,Diesel Generator Set,Prime Power Genset Yangzhou Hengyuan Electromechanical Equipment Co., Ltd. , http://www.lchypower.com
