| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and a device for controlling a brushless DC motor speed for an electric motor car. SOLUTION: An accelerator signal 11 on an electric motor car is acquired and processed, this signal 11 is compared with a default voltage value of a brushless DC motor speed control device. In the case when signal voltage from an accelerator is smaller than this default voltage, the accelerator is returned to a 0(zero) position; in the case when the signal voltage is larger than the default voltage value, the accelerator is not returned to the 0 position. By combination of an interface circuit 6, signal processing circuit 7, brake drive circuit 8, reset circuit 9, current signal processing circuit 10, etc., when the accelerator is located in the 0 position, the speed control device of a brushless DC motor is operated by an energy regenerative brake mode. When the accelerator is not returned to the 0 position, the device is operated by a non-energy regenerative mode. |
