MEASUREMENT AND QUANTITATIVE EVALUATION OF INVERTER-INDUCED BEARING CURRENTS

Dušan Agrež, Gregor Vidmar, Damijan Miljavec

Abstract

In this paper, new criterion for evaluation of endangerment of bearings due to bearing currents – the trend line of the Joule integral of bearing current - is proposed. Suggested is the measurement procedure for bearing currents with selection of appropriate sensor. An analysis, which is the basis for selection of current sensor for bearing current measurement, is presented. The shunt sensor as most appropriate sensor was implemented into measurement procedure and experimental measurements were performed on 1.6 kW brushless direct current (BLDC) motor.

Keywords

bearing currents, current sensor, Joule integral, level of endangerment of bearings

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IMEKO-WC-2012-TC10-O3.pdf

DOI

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IMEKO TC

TC10 - Measurement for Diagnostics, Optimization and Control

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