Results 171 to 180 of about 3,397 (222)

Commutation Torque Ripple Reduction of Brushless DC Motor in Braking Operation

IEEE Transactions on Power Electronics, 2018
In this paper, the commutation torque ripple is studied in the brushless DC motor (BLDCM) braking operation. As the phase currents flow in the reversed directions in the braking operation, the current circuits in the braking operation are different from those in the motor operation. For this reason, it is found that the commutation torque ripple can be
Tingna Shi, Xingzhuo Niu, Wei Chen, Changliang Xia   +3 more
openaire   +3 more sources

Direct Torque Control of Permanent Magnet Synchronous Motor With Reduced Torque Ripple and Commutation Frequency

IEEE Transactions on Power Electronics, 2011
In conventional direct torque controlled (DTC) permanent magnet synchronous motor drive, there is usually undesired torque and flux ripple. The existing literature have proposed some methods to reduce torque and flux ripple by optimizing the duty ratio of the active vector. However, these methods are usually complicated and parameter dependent.
null Yongchang Zhang, null Jianguo Zhu
openaire   +3 more sources

Pulsewidth Modulation Technique for BLDCM Drives to Reduce Commutation Torque Ripple Without Calculation of Commutation Time

IEEE Transactions on Industry Applications, 2011
This paper presents a three-phase pulsewidth modulation (PWM) technique for brushless dc motor (BLDCM) drives to reduce the commutation torque ripple. As compared to previous approaches, the presented technique does not require any torque observer and calculation of commutation time which may be sensitive to motor parameters and may require more ...
Yong-Kai Lin, Yen-Shin Lai
openaire   +3 more sources

Analysis of torque ripple due to phase commutation in brushless DC machines

IEEE Transactions on Industry Applications, 1992
An original analytical study is developed concerning the torque undulation due to phase commutation on brushless DC motors. The results indicate that the relative ripple is independent of current, varies with speed, and may reach 50% of the average torque.
R. Carlson, M. Lajoie-Mazenc, J.C. dos S. Fagundes   +2 more
openaire   +3 more sources

Commutation Analysis of Brushless DC Motor and Reducing Commutation Torque Ripple in the Two-Phase Stationary Frame

IEEE Transactions on Power Electronics, 2017
The control of brushless dc motors (BLDCMs) is similar to dc motors during the noncommutation interval. However, three phases are involved in electromechanical energy conversion during the commutation interval, making the control of the BLDCM similar to a three-phase ac motor during the commutation interval.
Weidong Jiang, Hui Huang, Jinping Wang, Yan Gao, Lei Wang   +4 more
openaire   +3 more sources

Simple Commutation Torque Ripple Reduction Using PWM With Compensation Voltage

IEEE Transactions on Industry Applications, 2020
In this article, a combination of a two- and three-phase switching method to reduce switching loss is presented. In the conduction region, the conventional two-phase switching topology is used to reduce switching loss. On the other hand, in the short commutation region, the proposed modified three-phase switching strategy that incorporates a voltage ...
JunHwi Park, Dong-Hee Lee
openaire   +1 more source

BLDCM Commutation Torque Ripple Strategy Optimization

Applied Mechanics and Materials, 2014
First of all, this article creates the mathematical model of blushless DC Motor. Secondly, analysis the reduction theory of commutation torque ripple. Finally, put forward a strategy to reduce the commutation torque ripple from the low-speed level and high-speed level.
Xiao Feng Wang, Wei Lin
openaire   +1 more source

Commutation-Torque-Ripple Minimization in Direct-Torque-Controlled PM Brushless DC Drives

IEEE Transactions on Industry Applications, 2006
This paper describes an improved implementation of direct torque control (DTC) to a permanent-magnet brushless dc (BLDC) drive. The commutation torque ripple, which occurs every 60deg elec. in a conventional three-phase BLDC machine with two-phase 120deg elec.
Y. Liu, Z. Zhu, D. Howe
openaire   +1 more source

Commutation torque ripple reduction for brushless DC motors with commutation time shortened

2017 IEEE International Electric Machines and Drives Conference (IEMDC), 2017
A control strategy with commutation time shortened is proposed to reduce the commutation torque ripple for brushless DC motor. The shorter commutation time favors the crossing-zero detection of back electromotive force in occasion of sensorless control, and meanwhile enhances the motor operation performance. In this paper, the theoretical background on
Yanfei Cao, Tingna Shi, Yapeng Liu, Zhiqiang Wang   +3 more
openaire   +1 more source

Commutation torque ripple reduction in BLDC motor using PWM_ON_PWM mode

2009 International Conference on Electrical Machines and Systems, 2009
The paper analyzes the steady commutation process of the BLDC motor using PWM mode, confirms the commutation time to keep non-commutation phase current amplitude constant during commutation period by way of PWM in the period to implement the compensation control to eliminate commutation torque ripple under both low speed and high speed operation ...
Guangwei Meng, Hao Xiong, Huaishu Li
openaire   +1 more source