Gasgoo Awards 2023 applicant:High-efficiency and low-noise silicon carbide electric drive system from Viridi Energy Mobility Technology Co,. Ltd.

Product: High-efficiency and low-noise silicon carbide electric drive system 

Description

VREMT’s full-stack self-developed new generation high-efficiency and low-noise silicon carbide electric drive system is developed on the basis of a highly integrated three-in-one, safe and reliable parallel-axis platform solution integrating the motor, reducer and electric control unit, which uses a third-generation 8-layer Hair-Pin high PDIV flat copper wire water-cooled permanent magnet synchronous motor, one-piece high-load high-efficiency reducer, and high-efficiency and high-power density SiC electric control unit, with the total peak efficiency > 95.2%, WLTC comprehensive efficiency = 91.8%, and range improvement by more than 5%.

Unique advantages

Use of the third generation power semiconductor silicon carbide technology and permanent magnet synchronous flat wire technology to support high-power high-torque output and higher power torque density.Use of new material technology and software strategies (intelligent PWM control/optimal control of water flow) to enhance system efficiency, save power and improve the vehicle endurance.Use of optimized electromagnetic scheme, gear trimming and software strategies (active noise reduction: harmonic injection, variable carrier frequency technology) to reduce audible noise and improve riding comfort.Use of smoothness control and DTCS function to increase the torque response speed to achieve fast body stabilization and enhance driving comfort.Use of temperature management strategy and background data analysis to monitor the system health status in real time and ensure the safety of users.

Application

The 200kW high-efficiency and low-noise silicon carbide electric drive system is mainly applied in new energy vehicles, including passenger cars, commercial vehicles, trucks, etc. The system has been mass-produced in June 2022 and is equipped with ZEEKER, Smart and other brands. Up to now, more than 38,000 units have been delivered, and will be equipped with Volvo, Lynk & Co, Galaxy, Geely commercial vehicles and many other models in mass production in 2023 and 2024.

Prospect

SiC power device for electric drive system can reduce the size of motor controller with lower energy loss and battery loss and longer range, and thus can reduce the overall vehicle cost and enhance the efficiency of the system in the conditions of urban traffic, large battery capacity and low voltage. Since Tesla switched to SiC controller in 2018, many new energy vehicle enterprises and component enterprises in the world have laid out the development of SiC electric drive system. With the application of SiC in the field of new energy vehicles and the reduction of SiC cost, the penetration of SiC in the field of vehicles will become higher and higher in the future.