公开(公告)号：US08355225B2

公开(公告)日：2013-01-15

申请号：US12873220

申请日：2010-08-31

申请人： Hyo jin Kim

发明人： Hyo jin Kim

IPC分类号： H02H9/04

CPC分类号： H02P29/032 ,  H02M2007/4835

摘要： Disclosed herein is an overvoltage protection apparatus and method of a high voltage inverter adapted to protect a load without any adverse effect from an overvoltage aroused by voltage fluctuation attributable to an impedance difference among an inverter, a load and a cable connected between the inverter and the load, wherein the apparatus and method converts a voltage command signal given as a digital signal into an analog reference signal by a main control unit, compares the analog reference voltage with a sawtooth wave having a predetermined voltage level and frequency in order to generate a PWM (Pulse Width Modulation) signal, determines the pulse width of the PWM signal, and converts the pulse width of the PWM signal to have a predetermined time interval in a case the pulse width of the PWM signal is less than a predetermined time interval.

摘要翻译： 本文公开了一种高压逆变器的过电压保护装置和方法，其适用于保护负载，而不会由于逆变器，负载和连接在逆变器与电源之间的电缆之间的阻抗差引起的电压波动而引起的过电压的任何不利影响 负载，其中所述装置和方法通过主控制单元将作为数字信号给出的电压指令信号转换为模拟参考信号，将模拟参考电压与具有预定电压电平和频率的锯齿波进行比较，以便产生PWM （脉宽调制）信号，在PWM信号的脉冲宽度小于预定时间间隔的情况下，确定PWM信号的脉冲宽度，并将PWM信号的脉冲宽度变换为规定的时间间隔。