Implementation of PWM control strategy for torque ripples reduction in brushless DC motors

Salah, Wael A.; Ishak, Dahaman; Zneid, Basem Abu; Abu-Al-Aish, Amir; Jadin, Mohd Shawal; Sneineh, Anees Abu

doi:10.1007/s00202-014-0329-7

Cited by 19 publications

(21 citation statements)

References 22 publications

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“…Outgoing current flows through the inverse parallel diodes and hence it is not possible to reduce the duration of the commutation period. Since the derivative of the outgoing current mainly depends on the amplitude of the back-emfs, low and high speed regions are considered separately in many studies [7]. A commutation period followed by a conduction period is repeated for every 60…”

Section: A Brief Analysis Of Bldcm Drives and Generalized Difference mentioning

confidence: 99%

A switched current controller with commutation delay compensation for the reduction of commutation torque ripple in BLDCM drives

Türker¹,

Khudhair²

2017

Turk J Elec Eng & Comp Sci

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Abstract:The mathematical model of the equivalent circuit of a brushless DC motor switches during the operation due to commutation. This issue causes a sudden ripple in the output torque, which is called commutation torque ripple.Brushless DC motor drives suffer from commutation torque ripple, affecting the performance of the motor in practical applications. A discrete-time switched controller is proposed to reduce the commutation torque ripple in brushless DC motor drives. The proposed controller is a combination of two distinct controllers designed for two different working regions of brushless DC motors. In addition, the commutation delay is also considered in the controller and a predictive structure is implemented to reduce this effect. The overall control scheme consisted of the switched controller and the commutation delay compensation, showing the originality of this study. The performance of the proposed controller scheme is tested through various comprehensive experiments to illustrate its effectiveness and viability.

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Section: A Brief Analysis Of Bldcm Drives and Generalized Difference mentioning

confidence: 99%

A switched current controller with commutation delay compensation for the reduction of commutation torque ripple in BLDCM drives

Türker¹,

Khudhair²

2017

Turk J Elec Eng & Comp Sci

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“…This assumption allows one to perform the analysis analytically. Interested reader is referred to [13], [18] for details.…”

Section: Analysis Of Commutation Torque Ripplementioning

confidence: 99%

“…However, strategies with this assumption are affected by the rotor speed since the slope of the outgoing current also changes with respect to speed. Thus, some proposed methods cover only the high speed or the low speed operation [5], [6], [13] while some others cover the full speed range [2]. [9] can be referred for a detailed comparative analysis of commutation torque ripple for three different control methods, namely conventional six-step, phase advancing and phase-advancing with overlapping.…”

Section: Introductionmentioning

confidence: 99%

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A discrete-time controller for the reduction of commutation torque ripple in BLDCM drives

Khudhair

Türker

2016

2016 IEEE International Conference on Industrial Technology (ICIT)

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In this paper, a control strategy for the current loop of brushless DC motor (BLDCM) drives is proposed to reduce the commutation torque ripple. The proposed method consists of two different controllers based on dead-beat structure. Two different electrical model of BLDCM for conducting and commutation periods are considered by the controllers that are switched in conducting and commutation periods. In addition, a model based prediction is utilized to predict the beginning and ending of the commutation periods. Then, this information is used to modify the reference phase voltages in order to reduce commutation torque ripple. The characteristics of the proposed controller are evaluated by numerical simulations and satisfactory results are obtained.

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“…Torque ripples are considered one of the main drawbacks of the BLDCM. They are generated due to several reasons such as non-ideal form of the back-EMF, cogging, and reluctance torques [7], which have led researchers to investigate and propose several torque ripples reduction methods [3,4,[7][8][9][10]. For instance, the analysis of torque ripples caused by the noncommutated phase is addressed in…”

Section: Introductionmentioning

confidence: 99%

Current Spikes Minimization Method for Three-Phase Permanent Magnet Brushless DC Motor with Real-Time Implementation

2018

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Due to their high efficiency and low cost of maintenance, brushless DC motors (BLDCMs) with trapezoidal electromotive forces (back-EMFs), have become widely used in various applications such as aerospace, electric vehicles, industrial uses, and robotics. However, they suffer from large current ripples and current spikes. In this paper, a new method for minimizing current spikes appearing during BLDCM start-up or sudden set point changes is proposed. The method is based on controlling the MOSFET gates of the motor driver using R-C filters. These filters are placed between the PWM control signal generator and the MOSFET gates to smooth these control signals. The analysis of the proposed method showed that the R-C filter usage affects the BLDCM steady-state performances. To overcome this limitation, the R-C filter circuit was activated only during current spikes detection. The effectiveness of the proposed method was analytically analyzed and then validated through simulation and experimental tests. The obtained results allowed a reduction of 13% in current spikes amplitude.

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Implementation of PWM control strategy for torque ripples reduction in brushless DC motors

Cited by 19 publications

References 22 publications

A switched current controller with commutation delay compensation for the reduction of commutation torque ripple in BLDCM drives

A switched current controller with commutation delay compensation for the reduction of commutation torque ripple in BLDCM drives

A discrete-time controller for the reduction of commutation torque ripple in BLDCM drives

Current Spikes Minimization Method for Three-Phase Permanent Magnet Brushless DC Motor with Real-Time Implementation

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