Filterless and Sensorless Commutation Method for BLDC Motors

Shahin Mahdiyoun Rad; Mohammad Reza Azizian

Filterless and Sensorless Commutation Method for BLDC Motors

Shahin Mahdiyoun Rad

Mohammad Reza Azizian

Vol. 18, No. 4, pp. 1086-1098, Jul. 2018

10.6113/JPE.2018.18.4.1086

Brushless DC motor

Current commutation

Filterless

Rotor position detection

Sensorless

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Abstract

This study presents a new sensorless commutation method for brushless direct current motors to replace Hall sensor signals with virtual Hall signals. The importance of the proposed method lies in the simultaneous elimination of the phase shifter and the low-pass filters, which makes the method simple and cost-effective. The method removes high ripple switching noises from motor terminals, thereby decreasing motor losses. The proposed method utilizes unfiltered line voltages with notches caused by current commutation. Hence, specific sign signals are defined to compensate for the effects of commutation noise. The proposed method is free from phase delay that originates from low-pass filters. The method directly produces virtual Hall signals, and thus, it can be interfaced with low-cost commercial commutation integrated circuits based on Hall sensors. Simulation and experimental results show the effectiveness and validity of the proposed method.

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Cite this article

[IEEE Style]

S. M. Rad and M. R. Azizian, "Filterless and Sensorless Commutation Method for BLDC Motors," Journal of Power Electronics, vol. 18, no. 4, pp. 1086-1098, 2018. DOI: 10.6113/JPE.2018.18.4.1086.

[ACM Style]

Shahin Mahdiyoun Rad and Mohammad Reza Azizian. 2018. Filterless and Sensorless Commutation Method for BLDC Motors. Journal of Power Electronics, 18, 4, (2018), 1086-1098. DOI: 10.6113/JPE.2018.18.4.1086.