|
Useful Links |
|
|
Article Details :: |
|
|
| Article Name : | | | A New Torque Control Method For Torque Ripple Suppression In BLDC Motar With Nonideal Back EMF | | Author Name : | | | Yandamuri Haribabu And V.V. Narasimha Murthy | | Publisher : | | | Ashok Yakkaldevi | | Article Series No. : | | | GRT-3070 | | Article URL : | |  | Author Profile View PDF In browser | | Abstract : | | | To improve the speed precision and stabilization of the gimbal servo system of double gimbal magnetically suspended control moment gyro, a comprehensive analysis of the reason of electromagnetic torque ripples of BLDC motor with nonideal back electromotive force (EMF) drives in commutation and conduction regions is presented. A novel automatic control method of torque is proposed. With this method. the current control rule is designed, and duty cycle of pulse width modulation (PWM) is regulated by measuring the wave function of back electromotive force. To eliminate the diode freewheeling of inactive phase, the PWM_ON_PWM scheme is used and PI controller is used for the speed regulation. Simulation results are given to show the comparison between HIGH_PWM_L_ON scheme and proposed PWM_ON_PWM scheme, the proposed methos can reduce the torque ripple effectively and improve the speed precision and stabilization as well. | | Keywords : | | |
|
|