Title :
Novel current sensor for PWM AC drives
Author_Institution :
University of Auckland, Department of Electrical and Electronic Engineering, Auckland, New Zealand
fDate :
1/1/1988 12:00:00 AM
Abstract :
A novel current sensor which determines the currents flowing in an inverter driven induction motor from observations of the pulse currents existing in the DC busbar of the PWM inverter is described. The sensor can determine the real part of the current, and, if the motor is supplying mechanical power, the current magnitude. It is low cost and easy to implement, and experimental results show good accuracy over a range of operating conditions.
Keywords :
electric current measurement; electric drives; electric sensing devices; induction motors; invertors; pulse width modulation; DC busbar; PWM AC drives; PWM inverter; accuracy; current magnitude; current sensor; induction motor; mechanical power; operating conditions; pulse currents; pulse width modulation;
Journal_Title :
Electric Power Applications, IEE Proceedings B
DOI :
10.1049/ip-b:19880005
