YASKAWARMSERVO DDS破釜沉舟

发布时间:2019-12-31
B、驱动IC内部输出电路不良或后置放大器DQ4、DQ10导通内阻变大等。如带载后检测电源电压无低落现象,检测T250输出电压偏低,则为T250不良,否则更换DQ4、DQ10等元件。DR40、DR45等阻值变大的现象比较少见。
    需要说明的是:正向激励电压的不足,只是表现出电机振动剧烈、输出电压偏相、频繁跳OC故障等现象,虽然有可能使电机绕组中产生直流成分出现过流状态,但对模块构不成一投入运行信号即爆裂的危害。而负向截止电压的丢失(负压供电回路的故障造成负栅偏压回路阻断),则表现出上电时正常,一按动启动按键,IGBT逆变模块便会发出“啪”的一声马上爆裂的故障!这是为何呢?
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