变频器的参数设定在调试过程中十分重要, 尤其是变频器的功率等级参数更为重要, 如果功率参数设置不当, 就有可能造成设备损坏。传统的功率参数设置都是由人工手动设置的, 出错的概率较高。介绍了一种全新的变频器功率自动辨识电路, 利用555定时器, 通过外围不同的电阻、电容值的配置, 产生不同频率的方波。不同的变频器功率, 对应不同的方波频率, MCU通过检测方波的频率来自动辨识驱动板的功率。

The parameter setting of frequency converter is very important in the debugging process, especially the power grade parameter of the frequency converter is more important. If the power parameter is not set properly, it is possible to cause damage to the equipment. The traditional power parameters are set manually, the probability of error is higher. A new kind of automatic identification circuit for power converter is introduced, which uses 555 timer to generate the square wave with different frequency through the configuration of different resistance and capacitance. Each power level corresponds to a particular square wave frequency, micro control unit (MCU) through the detection of square wave frequency to automatically identify the power of the drive plate.