2023-01-31<The Core Of Automobile Drive Motor Assembly>
The three major parts of automobiles have always been deeply rooted in the hearts of the people, from the well-known engine, gearbox, and chassis of fuel vehicles to the battery, motor, and electronic control of new energy vehicles.
As automobiles have higher and higher requirements for cruising range and fast charging, the electric drive system is essentially composed of multiple modules. At present, the mainstream technology is the three-in-one drive motor, motor controller, and reducer. Therefore, the integration, miniaturization, and smaller footprint of hardware while improving efficiency are the eternal pursuits of car companies!
Electric vehicles are driven by motors, which must be realized through electronic control units (motor controllers). Electric vehicle motor controllers use inverter bridges to modulate and output sine waves to drive motors.
The electronic control unit (motor controller) is generally composed of power distribution circuit, auxiliary power supply, drive circuit power device (IGBT), DSP circuit, structure and heat dissipation system. The circuit knowledge is very complicated, and the most important and core is the power device, that is, IGBT or SiC power module. At present, the electronic control unit of BYD e platform 3.0 uses a new generation of SiC electronic control, the power density has increased by nearly 30%, and the highest efficiency of electronic control 99.7%.
Equivalent substitution, the power device is the core of the drive motor assembly.