Results 191 to 200 of about 18,520 (212)

PWM control mode for four-quadrant operation of brushless DC motor

2017 36th Chinese Control Conference (CCC), 2017
Brushless DC motor has been becoming more popular in industry, electric and aerospace applications, making the control for four-quadrant operation of Brushless DC motor greatly significant. This paper presents pulse width modulation (PWM) control mode for four-quadrant operation of Brushless DC motor, which can realize both motoring and braking ...
Xuliang Yao, Yan Zhang, Xiaoming Jiang
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Hall-sensor signals filtering for improved operation of brushless DC motors

2011 IEEE International Symposium on Industrial Electronics, 2011
Brushless dc (BLDC) motors controlled by Hall-effect sensors are becoming widely available and used in a wide variety of applications. Such motors have been extensively researched in the literature under a common assumption that the Hall sensors are ideally placed 120 electrical degrees apart. However, sensor positioning may be quite inaccurate in low-
Pooya Alaeinovin, Juri Jatskevich
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Operational principles of brushless servomotors

1990
Abstract A brushless servomotor has been developed by using interdisciplinary mechatronics engineering. A mechanical switching device (commutator) is replaced by electronic circuits and controllers, resulting in a maintenance-free and high-performance servo drive. This chapter also describes various other kinds of technologies used in
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Brushless DC motor controller for tele-operation using embedded realtime linux

30th Annual Conference of IEEE Industrial Electronics Society, 2004. IECON 2004, 2005
Recently, the motor controllers requires various functions not only real-time control but also communication capabilities with remote host computer and other motor controller for synchronization. This paper presents a brushless motor controller for tele-operation by using the RTLinux and FPGA technologies.
null Chang-Hwan Choi, null Yong-Chil Seo, null Seungbo Kim   +2 more
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Electromagnetic mechanism of synchronous operation of the brushless doubly-fed machine

IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting, 2002
The brushless doubly-fed machine is a machine which incorporates the robustness of the squirrel cage induction machine and the speed and power factor control of a synchronous machine. The electromagnetic environment within the brushless doubly-fed machine is investigated using simple formulae in order to develop an intuitive feel for the mechanism ...
E. Wiedenbrug, M.S. Boger, A.K. Wallace, D. Patterson   +3 more
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Brushless DC drive operation during phase commutation under various switching patterns

2009 IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives, 2009
The paper deals with the operation of a brushless DC drive during the phase commutation. At first, the various switching patterns that can be used to command the inverter are identified. It is demonstrated that the switching patterns are a combination of two basic commutation modes. For each mode, the current transients during the phase commutation are
BERTOLUZZO, MANUELE, BUJA, GIUSEPPE, KESHRI R.   +2 more
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Synchronous operation of a rotating power electronic brushless doubly-fed generator

IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society, 2015
This paper presents the synchronous operation of a novel generator termed as the rotating power electronic brushless doubly-fed induction generator (RPE-BDFIG). It is shown that the generator operates well at the synchronous speed of the main machine, delivering the desired power to the grid.
Naveed-ur-Rehman Malik, Chandur Sadarangani, Alija Cosic   +2 more
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A novel PWM_OFF_PWM mode for braking operation of brushless DC motor

IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society, 2017
The conventional pulse width modulation (PWM) modes for braking operation in Brushless DC motor may cause diode freewheeling in inactive phase during normal conduction period which will aggravate torque ripple. In this paper, a novel braking PWM modulation mode named PWM_OFF_PWM is proposed to eliminate the diode freewheeling.
Xuliang Yao, Yan Zhang, Xiaoming Jiang
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Study on Four-Quadrant Operation of Brushless DC Motor Control Method

Applied Mechanics and Materials, 2013
Brushless DC motors, which are applied to the human skeleton boosters, require frequent switch of four-quadrant operation states of forward rotation, backward rotation, electro motion and braking control. This switch generally requires to be soft and smooth without overshoot, big impulse or speed mutation.
Jian Zhang, Yuan Jun Zhou, Jing Zhao
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Mathematical Model of Brushless DC Motor in Phase Loss Operation Mode

Applied Mechanics and Materials, 2014
A mathematical model of a three-phase brushless DC motor was developed for studying the phase loss mode and developing fault-tolerant algorithms. The motor model is obtained on the basis of a synchronous motor with rotor position feedback and is comprised of a matrix of failures.
George Odnokopylov, A. Bragin
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