Power Consumption Reduction in High Current Closed Loop Hall Effect Current Sensors Using Class D Amplifier

Saha, Aalok Dyuti and John, Vinod (2017) Power Consumption Reduction in High Current Closed Loop Hall Effect Current Sensors Using Class D Amplifier. In: 2016 IEEE INTERNATIONAL CONFERENCE ON POWER ELECTRONICS, DRIVES AND ENERGY SYSTEMS (PEDES) , DEC 14-17, 2016, Trivandrum, INDIA.

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Abstract

The closed loop hall effect current sensor is a popular current sensor because of its high bandwidth, ac and dc measurement, isolation. But the prime demerit of it is high power consumption at high currents. This is because of the losses in the linear power amplifier driving the compensating winding current. In this paper, a novel closed loop hall effect current sensor involving a Class D Amplifier as power amplifier is proposed to reduce the sensor power consumption and make the sensor more compact. This paper discusses the development of such a current sensor, it's stability issues, noise floor, procedures to overcome those problems, the tradeoff between noise and bandwidth. Finally a prototype current sensor is shown and it's performance is compared to a similar range commercially available current sensor. It is analysed and then verified experimentally that the proposed current sensor consumes much less power than the commercial sensor for higher currents.

Item Type:	Conference Proceedings
Publisher:	IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA
Additional Information:	Copy right for this article belongs to the IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), Trivandrum, INDIA, DEC 14-17, 2016
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	23 Sep 2017 04:54
Last Modified:	23 Sep 2017 04:54
URI:	http://eprints.iisc.ac.in/id/eprint/57898

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