Research Of Electric Vehicle Controller Based On Induction Motor

As an important new energy product, Electric Vehicles have broad marketprospect and application value. The research and promotion of Electric Vehicles is aneffective way to promote energy-saving and emission reduction, as well as enhancethe quality of living and respond to the call of our country. And also is a necessarymeans to promote social progress in science and technology and sustainabledevelopment. Electric vehicle drive control system is one of the key technologies forthe related technology of Electric Vehicles. Therefore, as the core component ofelectric vehicle, the controller of electric vehicle is selected as the research object.Based on the research of electric vehicle controller related control technology andhardware structure implementation, and combined with the existing condition ofbattery technology, the research of improve energy efficiency so as to increaseelectric vehicles driving range is carried out. And at the same time, in order toimprove the control code compilation speed, the method of code automatic generationis studied and new solutions of code automatic generation is tested in this paper.In the research of electric vehicle controller, control algorithm and its applicationis the key technology in the development process of electric vehicle. This papermakes a theoretical analysis based on the relationship between the DC bus voltageand the output voltage which is modulated by electric Vehicle controller. Aiming atthe problem of low voltage utilization rate of SPWM, analysis based on the SVPWMvector control algorithm is made, and the conclusion of the SVPWM controller canhave a higher voltage utilization of the DC bus voltage. The use of control algorithmof vector control (SVPWM) can reduce the amount of battery, which can reduce theproduct cost; or under the condition of using the same number batteries, each batterycan release more power. In addition, this produces the power loss according to controlthe stator current under the condition of the battery in low charge state. Finally,combining the control method according to the above two aspects, seeking ways toimprove the control strategy of the electric vehicle driving range in a low batterycondition.On the other hand, according to the problem of long cycle of code development,low reliability, hard to maintenance in later stage and other difficult issues, exploringthe method of code automatic generation in the development mode based on Matlabmodel, and the result indicate that this development process has good reliability andreadability.Finally, based on analyzing the principle of control scheme of each applicationcircuit, the hardware implementation of the prototype motor controller and testplatform is built, and the driving range test of electric vehicles is performed, andcode automatic generation of the control algorithm is verified by the experiment, andthe experiment result indicates that the control scheme proposed in paper can improve driving range at a certain extent, and the code automatic generation method canimprove the code development speed.In conclusion, this paper is to improve the electric vehicle controller performanceand practical value, some key technology can shorten the product development cyclewere studied. Some of the new scheme is proposed in the research process, andexperiments on the proposed scheme have been verified. The experimental resultsindicates that the electric vehicle controller is stable and has high voltage utilizationratio performance, and consistent with the theoretical analysis results, and thedevelopment process based on the matlab model improves the efficiency of productdevelopment, and shorten the code development cycle.