A New Approach of Minimizing Commutation Torque Ripple for BLDCM

Tan, Bo; Hua, Zhiguang; Zhang, Lu; Fang, Chun

doi:10.3390/en10111735

Cited by 13 publications

(11 citation statements)

References 15 publications

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“…Based on (12), the torque waveform during the commutation process is shown in Figure 4. It can be seen that the torque change is zero only when t = 3Li a /E, and a large torque ripple occurs at the end of commutation process, namely the moment i a just reduces to zero.…”

Section: Effect Of Back-emf Variation On Torquementioning

confidence: 99%

“…If the commutation torque ripple is not suppressed by specific reduction strategy, the vibration and noise of motors will increase, and the promotion application of BLDCM will be restricted in a field that has strict requirements for torque ripple and noise [9][10][11]. When the BLDCM operates in its high-speed range, limited by the output voltage of the inverter, the incoming phase and the outgoing phase current are difficult to change rapidly, so the motor will generate greater commutation torque ripple in this region [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Commutation Torque Ripple Suppression Strategy of Brushless DC Motor Considering Back Electromotive Force Variation

Jiang

Chen

et al. 2019

Energies

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This paper presents a commutation torque ripple suppression strategy for brushless DC motor (BLDCM) in the high-speed region, which considers the back electromotive force (back-EMF) variation during the commutation process. In the paper, the influence of actual back-EMF variation on the torque and outgoing phase current during the commutation process is analyzed. A modified smooth torque mechanism is then reconstructed considering the back-EMF variation, based on which a novel torque ripple suppression strategy is further designed. Compared with the traditional strategy which controls the chopping duty cycle relatively smoothly in the commutation process, the proposed strategy dynamically regulates the chopping duty cycle, which makes it show a gradual decrease. This strategy can suppress the commutation torque ripple even in a long commutation process, and broaden the speed range of the commutation torque ripple reduction. Under the experimental conditions of this paper, the proposed strategy can effectively reduce the commutation torque ripple in the high-speed region, and avoid the outgoing phase current cannot be reduced to zero. The experimental results verify the correctness of the theoretical analysis and the feasibility of the proposed strategy.

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Section: Effect Of Back-emf Variation On Torquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Commutation Torque Ripple Suppression Strategy of Brushless DC Motor Considering Back Electromotive Force Variation

Jiang

Chen

et al. 2019

Energies

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show abstract

“…In Figure 2, the transition from sector 2 to sector 3 induced an electromagnetic torque expressed by the following Equation (4) [11,14]:…”

Section: Energies 2018 11 X For Peer Review 3 Of 14mentioning

confidence: 99%

“…where W is the rotor angular velocity, B is the viscous friction coefficient, J is the moment of inertia, and T L is the load torque. In Figure 2, the transition from sector 2 to sector 3 induced an electromagnetic torque expressed by the following Equation (4) [11,14]:…”

Section: Energies 2018 11 X For Peer Review 3 Of 14mentioning

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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“…Good performance has been achieved compared with a conventional converter. In addition, the ripples in torque during the commutation period have been improved in [12] by optimizing the currentloop controller of a PMSM-drive system. It was illustrated in [13] that the optimizing of the reluctance torque to a minimum value is not adequate to get low ripples in torque.…”

Section: Introductionmentioning

confidence: 99%

Design of an RLC Compensator for a Synchronous Motor: Torque Ripple Improvement

Fadheel

2019

QJES

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AC-drive systems based Permanent Magnet Synchronous Motor (PMSM) are widely utilized in industrial applications due to many advantages including excellent efficiency, best reliability, and low-effective cost compared with DC-drive systems. Design and implementation of an RLC compensator for a PMSM-drive system is demonstrated in this paper. The main aims of using an RLC compensator are decreasing of Total-Harmonics-Distortion (THD) of the input line current and Ripple Factor (RF) of the electromagnetic torque over a wide range variation in rotor speed and load. The entire transfer function of the proposed system is derived for stability verification under the change of rotor speeds. The proposed PMSM-drive system is implemented with and without RLC compensator for two cases; which are at a fixed load and a step-change in load. Good performance is achieved using the proposed RLC compensator; in terms of THD and RF are 0.77% and 3.13%, respectively.

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A New Approach of Minimizing Commutation Torque Ripple for BLDCM

Cited by 13 publications

References 15 publications

Commutation Torque Ripple Suppression Strategy of Brushless DC Motor Considering Back Electromotive Force Variation

Commutation Torque Ripple Suppression Strategy of Brushless DC Motor Considering Back Electromotive Force Variation

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

Design of an RLC Compensator for a Synchronous Motor: Torque Ripple Improvement

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