ABB MC91 HESG440588R4

是一种电动汽车驱动电机控制器，它与车辆的制动系统协同工作，可以在制动过程中实现再生制动。在制动过程中，控制器会将电源频率降低到低于200赫兹，使电机的同步速度变为2400 rpm，电机就会充当发电机，直到转速降至2400。在这个过程中，可以提取电力，并将其存储在电池或电容器组中。

It is an electric vehicle drive motor controller that works in conjunction with the vehicle's braking system and can achieve regenerative braking during the braking process. During the braking process, the controller will reduce the power frequency to below 200 Hz, causing the synchronous speed of the motor to become 2400 rpm. The motor will act as a generator until the speed drops to 2400 rpm. During this process, electricity can be extracted and stored in batteries or capacitor banks.