Patent ID: 9698591
Date: 2017-07-04
CPC Classifications: H02H

Claim:
1. An over-current protection method for a DC Inverter, wherein said over-current protection method comprises: sampling output currents from a power module to form a sampled signal; amplifying with a plurality of magnification factors and low-pass filtering said sampling signal to generate a first over-current signal and a second over-current signal, wherein a first magnification factor, on the basis of which said first over-current signal is generated, is pertinent to an over-current threshold of said power module, and a second magnification factor, on the basis of which said second over-current signal is generated, is pertinent to an over-current threshold of a motor; generating a first interrupt trigger signal based on said first over-current signal; comparing said second over-current signal with a reference voltage corresponding to said over-current threshold of the motor, with a comparison result being a second interrupt trigger signal; controlling said power module based on said first interrupt trigger signal; and controlling said motor based on said second interrupt trigger signal.