Electric power conversion device, system using same, and diagnostic method for same

Electric power conversion device, system using same, and diagnostic method for same

Provided is an electric power conversion device having a function of detecting, at low cost and at an early stage, a sign of insulation failure of a transformer or a rotary machine. This electric power conversion device is provided with an inverter circuit and a PWM signal generation unit that makes...

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1. Verfasser: MAKI, KOHJI
Format: Patent
Sprache:chi ; eng
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MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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creator MAKI, KOHJI
description Provided is an electric power conversion device having a function of detecting, at low cost and at an early stage, a sign of insulation failure of a transformer or a rotary machine. This electric power conversion device is provided with an inverter circuit and a PWM signal generation unit that makes a comparison between a carrier signal and a voltage command value and generates a PWM signal for driving the inverter circuit. The electric power conversion device feeds and receives electric power through connection to a transformer or a rotary machine provided with a winding wire. The electric power conversion device is provided with: an electric current sensor that detects an electric current to be fed to or received from the transformer or the rotary machine; and a diagnosis unit that diagnoses insulation degradation of the transformer or the rotary machine. The diagnosis unit is provided with: an electric current sampling unit that acquires an electric current detection value by detecting an electric current
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language chi ; eng
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subjects MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
title Electric power conversion device, system using same, and diagnostic method for same
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