The difference between electric vehicles and traditional fuel vehicles lies in the power part, which is also the core part of electric vehicles. A pure electric vehicle system usually consists of three systems, namely, the power drive subsystem, the main energy subsystem, and the auxiliary control subsystem. The electric drive subsystem consists of an electronic controller, a power converter, a motor, a mechanical drive device, and a drive wheel. The main energy subsystem consists of the main power supply, an energy management system, and a charging system; the auxiliary control subsystem provides power steering, temperature control, and auxiliary power supply functions. The following figure shows the basic structure of an electric locomotive: The main working principle of an electric vehicle is: According to the signal input by the brake pedal and the accelerator pedal, the electronic controller sends corresponding control commands to control the power device of the PWM converter. The function of the PWM converter is to adjust the power flow between the motor and the main power supply. When the motor is braked, the kinetic energy of the regenerative brake is absorbed by the main power supply. The power flow flows backward at this time, and the energy management system and the electronic controller control the regenerative brake and its energy recovery, the energy management system and the charging system control the charging and monitor the power usage. Auxiliary power sources provide different levels of voltage for auxiliary systems of electric vehicles and provide necessary power. They provide power for power steering, air conditioning, braking, and other auxiliary devices. In addition to the signal from the brake pedal and the accelerator pedal to the electric vehicle, the steering wheel is also an important input signal. the power steering system determines the flexible steering of the car based on the angle position of the steering wheel. The main implementation process of the electronic drive part and main power supply subsystem is as follows: the composition of pure electric vehicles includes five main parts: battery, drive motor, motor controller, battery management system and car body. The motor drive and control system are the core of electric vehicles and the biggest difference between them. During the operation of the above system, the signal collection of the Energy (battery) management system requires a highly isolated b0505 product in terms of power motor drive, our IGBT driver Power Supply qaw and QA series are both the first choice. Process Monitoring requires effective isolation between high-voltage and low-voltage terminals. As a bridge between high-voltage and low-voltage terminals, our high-isolation products have won the industry's recognition.
Guide to selection of electronic power supply for jinshengyang automobile (3)-Introduction to the overall electric vehicle Solution
