Error detector of Emergency line bypass switching circuit controller of Power converter

摘要

An error detection unit of an emergency change circuit control unit of a power conversion apparatus that activates a bypass unit that receives an abnormal signal from the control unit when the external power source is normal and the control unit of the power conversion unit is faulty, Wherein the error detection unit of the control unit comprises an inversion element U3D, a resistor R11 connected in series with the minimum internal resistance Zmin of the control unit, and a resistor R11 connected between the input of the inversion element U3D and the ground When the internal impedance of the control unit becomes the high impedance state, the input of the inverting element U3D is supplied with less than the voltage Vih recognized by the inverting element U3D as 'high' The present invention provides an emergency switch circuit error detection apparatus for a power conversion apparatus.