Insulating structure for power conversion device
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United States of America Patent
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Nov 7, 2017
Issued Date -
N/A
app pub date -
Nov 13, 2014
filing date -
Dec 26, 2013
priority date (Note) -
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Abstract
Due to increase of demand for safety of device, reinforcement of insulation of exposed conductive parts is required also in power conversion device. Relay unit having optical transmission unit, signal processing unit and power generating unit is provided between control circuit unit and gate drive circuit unit which form control device for an inverter. A gate signal generated in the control circuit unit is inputted into the signal processing unit of the relay unit through the optical transmission unit, and is outputted to the gate drive circuit unit from the signal processing unit through the optical transmission unit. Further, AC power is supplied to the power generating unit of the relay unit from a control device low-voltage AC power source through high-withstand voltage transformer. AC power is supplied to the gate drive circuit unit from the power generating unit of the relay unit through high-withstand voltage transformer.
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