Influence of PWM modes on commutation torque ripples in sensorless brushless DC motor control system

Zhang, Xiangjun; Bo-shi, Chen

doi:10.1007/s11741-996-0028-3

Cited by 12 publications

(4 citation statements)

References 1 publication

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“…Therefore, it is widely applied in office automation, computer peripheral devices and instruments, as well as domestic electric appliances, etc. [1]. However, in a practical BLDCMbased drive, significant torque pulsations may arise due to the imperfect back-EMF waveform, commutation modes between phase windings, and cogging torque, etc.…”

Section: Introductionmentioning

confidence: 99%

“…[2]- [5]. Particularly, caused by the freewheeling of phase currents and limited DC-link bus voltages, the torque ripple during phase current commutation is usually considered as one of the main drawbacks of BLDCM drives, which varies with different PWM modes [6]- [8]. In addition, the non-commutation phase current as well as the output torque may also fluctuate significantly in the course of commutation period [9].…”

Section: Introductionmentioning

confidence: 99%

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A Novel Region-Refinement Pulse Width Modulation Method for Torque Ripple Reduction of Brushless DC Motors

Liu¹,

Zhou²,

Wang³

2019

IEEE Access

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Brushless dc motors (BLDCMs) exhibit relatively large torque ripple due to the current pulsation during the commutation process. In this paper, first, the production mechanism of the commutation torque ripple is analyzed in detail, where the diode freewheeling in the inactive phase winding and the noncommutation torque ripple under the existing PWM modulation modes are compared for a three-phase sixswitch inverter-fed BLDCM drive. The torque ripple expression of each PWM mode is derived analytically. Thereafter, a new region-refinement PWM method is proposed, in which a normal operation region of 60 • is refined into two 30 • sub-regions, and PWM-ON and ON-PWM modulation method is suitable to be employed, respectively, in the former and latter 30 • regions. To verify the effectiveness of reducing the noncommutation torque ripple, both simulations and experiments are conducted on a three-phase prototyped BLDCM. The results demonstrate that the torque ripple under the proposed PWM mode can be reduced significantly.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Novel Region-Refinement Pulse Width Modulation Method for Torque Ripple Reduction of Brushless DC Motors

Liu¹,

Zhou²,

Wang³

2019

IEEE Access

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“…Various pulse‐width modulation (PWM) methods have been analysed which can eliminate the freewheeling action of diode to control electromagnetic torque. The study on the commutation torque ripple has been made under the conventional PWM techniques in [11, 12]. It is indicated that the torque ripple can be reduced to a lower level by using the PWM‐ON‐PWM strategy during commutation and non‐commutation intervals.…”

Section: Introductionmentioning

confidence: 99%

Simple overlap angle control strategy for commutation torque ripple minimisation in BLDC motor drive

Lad¹,

Chudamani²

2018

IET Electric Power Applications

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In this paper, a novel overlap angle controlled Direct Torque Control (DTC) scheme is proposed which strikes the balance between commutation torque ripple and losses. The commutation torque ripple in a Brushless DC (BLDC) motor is mainly due to the effect of commutation on non-commutating phase current and it will be more severe in high power applications. DCT techniques are used to reduce the torque ripple. In comparison to the conventional two-phase conduction Six-Step DTC (SSDTC), the commutation torque ripple is considerably reduced by Twelve-Step DTC (TSDTC) but at the cost of increased inverter and winding losses. The proposed method offers commutation torque ripple minimisation and loss optimization simultaneously by controlling the motor operation in hybrid two-and three-phase conduction. The proposed method basically leads to motor operation in three phase conduction during overlap region and in two phase conduction during nonoverlap region. The overlap and non-overlap regions are identified by calculating the commutation interval and suitably scaling it by a factor K ov. The proposed method is validated through experimental results and the effect on commutation torque ripple and drive efficiency are compared with SSDTC and TSDTC experimentally.

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“…In addition, the absence of brushes leads to high reliability, low maintenance and high speed capability. Therefore, it is widely applied in office automation, computer peripheral devices, instruments, domestic electric appliances, etc [1]. However, in a practical BLDC drive, significant torque pulsations may arise due to the back-EMF waveform departing from the ideal, as well as commutation torque ripple, pulse width modulation (PWM) switching, and cogging [2] [3].…”

Section: Introductionmentioning

confidence: 99%

Analysis of commutation torque ripple using different PWM modes in BLDC motors

Chuang

2009

Conference Record 2009 IEEE Industrial &Amp; Commercial Power Systems Technical Conference

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Abstract-Torque ripple generated in the commutation interval is one of the main drawbacks of Brushless DC (BLDC) motors. This paper presents an comprehensive analysis on the generated torque ripples of trapezoidal back-EMF due to phase commutation in the six switch, three-phase inverter brushless dc motor drives. Experimental results verify the amplitude of the torque ripple under 4 kinds of PWM pattern, respectively.

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Influence of PWM modes on commutation torque ripples in sensorless brushless DC motor control system

Cited by 12 publications

References 1 publication

A Novel Region-Refinement Pulse Width Modulation Method for Torque Ripple Reduction of Brushless DC Motors

A Novel Region-Refinement Pulse Width Modulation Method for Torque Ripple Reduction of Brushless DC Motors

Simple overlap angle control strategy for commutation torque ripple minimisation in BLDC motor drive

Analysis of commutation torque ripple using different PWM modes in BLDC motors

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