Patent ID: 9696743
Date: 2017-07-04
CPC Classifications: B60L,G05F,Y02T

Claim:
1. A leakage current cancelation circuit that is part of an electrical power system having a power converter, a load, and a ground node, the leakage current cancelation circuit comprising: a first input node that receives a first signal from a first node, wherein a common mode current is present on the ground node during operation of the electrical power system, and wherein the first node is selected from the group consisting of: an input node of the power converter, an output node of the power converter, and a node coupled to the ground node; a leakage cancelation current generator that receives the first signal from the first input node, wherein the leakage cancelation current generator generates a leakage cancelation current without directly sensing the common mode current; and a first output node, wherein the leakage cancelation current that is generated by the leakage cancelation current generator is supplied onto the first output node, and wherein the output node is coupled to a second node selected from the group consisting of: an input node of the power converter, an output node of the power converter, and a node coupled to the ground node.