scholarly journals Improved Analytical Modeling of a Ellipse Shape Permanent Magnet Rotor in Ultra-High-Speed Brushless DC motor for the Reduction of Torque Ripple

2013 ◽  
Vol 8 (4) ◽  
pp. 945-950
Author(s):  
So-Young Sung ◽  
Jae-Hoon Jeong ◽  
Ji-Hwan Choi ◽  
Hyung-Il Park ◽  
Seok-Myeong Jang
Keyword(s):  
Permanent Magnet ◽  
High Speed ◽  
Analytical Modeling ◽  
Torque Ripple ◽  
Dc Motor ◽  
Brushless Dc Motor ◽  
Brushless Dc ◽  
Ultra High Speed

Research on Transient Electromagnetic Field Model of High Speed Permanent Magnet Brushless DC Motor Based on the Theory of Constant Electromagnetic Field

2016 ◽  
Vol 13 (10) ◽  
pp. 6539-6548
Author(s):  
Fan Jinrui ◽  
Li Hong ◽  
Ding Yongjie ◽  
Yu Daren ◽  
Li Dong
Keyword(s):  
Electromagnetic Field ◽  
Permanent Magnet ◽  
High Speed ◽  
Field Model ◽  
Dc Motor ◽  
Brushless Dc Motor ◽  
Brushless Dc ◽  
Transient Electromagnetic ◽  
Constant Electromagnetic Field ◽  
Permanent Magnet Brushless Dc

The development of ultra-high speed motor is the development direction of the information industry in the future, and it is also the important guarantee for the production efficiency. Objective: To study the working model of the electromagnetic field of the permanent magnet brushless DC motor in the condition of constant electromagnetic field. Methods: Based on the theory of constant electromagnetic field, the model of a high speed permanent magnet brushless DC motor is derived. Process: Combined magnetic circuit calculation method and finite element method of electromagnetic field, and then use the mathematical model to calculate the electromagnetic. Finally, by using the model simulation to verify its practicability. Conclusion: The inhibiting effect of the ring structure rotor pole and cogging torque ripple can meet the requirements of high-speed motor mechanical and electromagnetic performance, meanwhile, the motor has a good performance in this way. So, it can provide reference for the construction of the transient electromagnetic field model of high speed permanent magnet brushless DC motor in the future.

scholarly journals Sensor less Speed Control for Permanent Magnet Motors with Non- Sinusoidal Back EMF

2019 ◽  
pp. 462-467
Author(s):  
C. Jayashankar ◽  
S. Gobinathan
Keyword(s):  
Permanent Magnet ◽  
High Reliability ◽  
Direct Torque Control ◽  
Torque Ripple ◽  
Dc Motor ◽  
Pi Controller ◽  
Low Noise ◽  
Torque Control ◽  
Brushless Dc Motor ◽  
Brushless Dc

Brushless DC motor has a rotor with permanent magnet and has no mechanical commutator which leads to many advantages like less maintenance, long life, high reliability, low inertia, low friction and low noise. Since the brush system/commutator assembly is replaced by an electronic controller which can be easily integrated into other required electronics, thereby improving the effective power to weight and power to volume ratio. In this paper the direct torque control method is employed to improve its torque ripple content which is been compared with conventional method by using MATLAB. In this project the three phase brushless DC motor model is designed with proportional integral controller and tested in MATLAB software. The PI controller is used to control the speed of the brushless DC motor. On the other hand parameters like Back EMF, current; speed and torque are evaluated for the designed models of BLDC motor. Due to the easy implementation and simple control structure the convectional PI controller are used in industries.

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