Results 191 to 200 of about 18,623 (223)

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +2 more sources

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

Fault-tolerant operation of brushless machines having magnets in the stator

2009 IEEE International Electric Machines and Drives Conference, 2009
The doubly salient permanent magnet (DSPM) machine is a new class of brushless machine having magnets in the stator. In this paper, a strategy for fault-tolerant operation of a DSPM motor drive is proposed. In order to enhance the faulty electromagnetic performance, the DSPM motor operates in a remedial brushless AC (BLAC) mode under the open-circuit ...
Wenxiang Zhao, Ming Cheng, Wei Hua, Xiaoyong Zhu, Yunqian Zhang   +4 more
openaire   +1 more source

Optimal operation of the rotating transformer brushless excitation of synchronous machine

2003 IEEE International Symposium on Industrial Electronics ( Cat. No.03TH8692), 2004
The brushless excitation of synchronous machines is an attractive solution for wound rotor machines, since no slip rings are necessary. The paper investigates the rotating transformer method, where the excitation machine is a wound rotor induction machine supplied by an excitation converter.
K. Veszpremi, I. Schmidt, M. Hunyar
openaire   +1 more source

Modeling and operation analysis of the cascade brushless doubly-fed machine

ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501), 2002
The brushless doubly-fed machine is the most effective type of electrical machine suitable for driving windmills or water pumps to perform speed-adjusting, energy-saving operation, which make give it very good application prospects. In this paper, the practical mathematical model for a cascade brushless doubly-fed machine was derived in detail and the ...
null Bian Songjiang, null He Yikang, null Zhang Hui   +2 more
openaire   +1 more source