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Sensors 2017, 17(5), 1146; doi:10.3390/s17051146

An Improved Model Predictive Current Controller of Switched Reluctance Machines Using Time-Multiplexed Current Sensor

School of Mechanical Engineering, Shanghai JiaoTong University, 800 Dongchuan Road, Minhang Qu, Shanghai 200240, China
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Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 5 March 2017 / Revised: 5 May 2017 / Accepted: 9 May 2017 / Published: 17 May 2017
(This article belongs to the Section Physical Sensors)
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Abstract

This paper presents a fixed-switching-frequency model predictive current controller using multiplexed current sensor for switched reluctance machine (SRM) drives. The converter was modified to distinguish currents from simultaneously excited phases during the sampling period. The only current sensor installed in the converter was time division multiplexing for phase current sampling. During the commutation stage, the control steps of adjacent phases were shifted so that sampling time was staggered. The maximum and minimum duty ratio of pulse width modulation (PWM) was limited to keep enough sampling time for analog-to-digital (A/D) conversion. Current sensor multiplexing was realized without complex adjustment of either driver circuit nor control algorithms, while it helps to reduce the cost and errors introduced in current sampling due to inconsistency between sensors. The proposed controller is validated by both simulation and experimental results with a 1.5 kW three-phase 12/8 SRM. Satisfied current sampling is received with little difference compared with independent phase current sensors for each phase. The proposed controller tracks the reference current profile as accurately as the model predictive current controller with independent phase current sensors, while having minor tracking errors compared with a hysteresis current controller. View Full-Text
Keywords: model predictive control; current controller; fixed switching frequency; multiplexed current sensor; switched reluctance machine model predictive control; current controller; fixed switching frequency; multiplexed current sensor; switched reluctance machine
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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    Link: http://pan.baidu.com/s/1qY98Fla
    Description: sensors->datas: simulation and experimental datas used in manuscripts sensors->simulation: simulation setup and code sensors->experiment: program of DAQ and code of DSP2812 sensors->caption.txt: annotation of software edition code contents

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MDPI and ACS Style

Li, B.; Ling, X.; Huang, Y.; Gong, L.; Liu, C. An Improved Model Predictive Current Controller of Switched Reluctance Machines Using Time-Multiplexed Current Sensor. Sensors 2017, 17, 1146.

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