At present, the economic development speed of every country in the world is relatively stable, but in the past period of development, the negative impact of people on the ecological environment is more serious, and the proportion of automobile emissions in the field of environmental pollution is relatively large. Under this background, the electric vehicle has become a world model.
Every country in the area pays close attention to it extensively, so it has certain practical significance to study the development of electric vehicle motor controller at home and abroad. The author studies it based on practical work experience, and obtains the actual development of electric vehicle motor controller. I hope relevant staff can ask this question in the future. The analysis of the problem plays a role of reference to a certain extent, and ultimately contributes to the process of social and economic development in China.
Standing on the level of the world to carry out analysis work, in the past period of time emerged are brush DC motor, general synchronous motor and brush magnet motor and so on, product updating speed is relatively fast, until now also in use. Since the 1980s, surface permanent magnet synchronous motors (SPPMSM) have gradually turned to commercialization. Since 1990, switched-type and built-in permanent magnet synchronous motors (PMSM) have gradually entered the market. At the same time, they have been gradually acquired in electric vehicles and hybrid electric vehicles. To application. On the basis of the application to a certain extent of the era of electric enterprise model development, the actual industrial level of each country and market preference, we can draw the conclusion that induction motor should be used first, and permanent magnet synchronous motor is basically used in electric vehicles put into production in recent years. In recent years, electric vehicles developed in Europe, America and other countries generally use AC induction motors.
This kind of motor controller in the actual operation process shows that the price is low, and the cost is the starting point. The induction motor should be widely used in the field of electric vehicles. The specific structure of switched relay type motor is relatively novel, and the performance level is relatively high in the start-up process, and there will be no excessive impulse current in the actual operation process, but the problem exposed in the actual operation process is that the noise is relatively large. The driving modes used in the motor drive system of vehicles can be divided into centralized driving mode and wheel independent driving mode. The specific structure of centralized driving mode is relatively simple, and some transmission devices can still be used in internal combustion vehicles.
It is the most widely used electric driving mode in the field of electric vehicles in our country at present. On the basis of applying this driving mode to a certain extent, I want to make the motor cool down. It will be simpler to solve the problems of anti-vibration and electromagnetic interference properly. However, the structure of centralized drive system is more complex and the transmission efficiency is relatively low.
It is difficult to control the driving wheel rectangle on both sides effectively, so it will also affect the operation stability and safety of electric vehicles to a certain extent. The characteristics of wheel independent driving mode in practical application are that the transmission system can be optimized and adjusted, and the setting work can be simplified to a high degree. Because it is possible to form independent control for each motor, at the same time, thermostatic element it can also realize the two goals of independent adjustment of wheel driving force and effective control of yaw moment. On this basis, it will be easier to form electric control for vehicle chassis system, which will make the driving performance of vehicle and the yaw moment of vehicle more effective. Driving performance has been improved. But the problem exposed in the actual operation of rim motor drive system is that the wheel weight is too large, so it will affect the power performance of the vehicle to a certain extent. On this basis, other problems may arise, such as the difficulty of motor heat dissipation, waterproof and dust-proof work. Increase in degree.
For the control of motor drive system, it involves the problems of voltage waveform and modulation rate control. In addition to the problems mentioned above, in the field of motor control hardware, electric vehicles must undergo a number of control calculations within the sampling period, plus a certain insurance failure handling function, which makes the programming process used in the actual work more complex.
In the process of practical application of the drive system, the traditional centralized drive mode still occupies the main position. Permanent magnet motor shows a little prominent in the actual application process, so it will be widely used in the field of pure electric vehicles and hybrid electric vehicles. However, the cost level of analysis work, on the basis of the application of basic models of electric vehicle body and suspension to a certain extent, can make the production cost of electric vehicles effectively controlled. In a word, from the level of new energy vehicle, the motor manufacturers who provide supporting services for electric buses got some economic benefits at the earliest time.
They can recover the cost of R&D in a relatively short period of time. In the field of electric vehicle motor controller, the pioneer occupies a prominent market position. It’s more stable. From the medium-term point of view, passenger cars still occupy the highest proportion in the field of new energy vehicles. From a long-term point of view, compared with private cars, the size of buses in various countries is always relatively small, and the largest archives in the market are still private cars. However, in the field of private cars, it is difficult to make motor controllers widely used, and it should be given a certain degree. The government’s policy support can make motor controller make more outstanding contribution in the field of ecological environment protection in our country.