The Research on Suppression Strategies for Electromagnetic Torque Ripples of Brushless DC Motors

2014 ◽  
Vol 910 ◽  
pp. 327-331
Author(s):  
Lian Jun Hu ◽  
Xiao Hui Zeng ◽  
Hong Song ◽  
Xiao Long Huang ◽  
Ming Liu
Keyword(s):  
Control Algorithms ◽  
Electromagnetic Torque ◽  
Tracking Errors ◽  
Brushless Dc Motors ◽  
Brushless Dc ◽  
Dc Motors ◽  
On Line ◽  
Suppression Method ◽  
Torque Ripples ◽  
And Control

Despite of its remarkable active performances, brushless DC motors, which are widely used in mechanical engineering, have an obvious disadvantage in its high electromagnetic torque ripples. In the paper, a ripple suppression method based on predictive controls of stator currents is proposed according to analysis of causes electromagnetic torque ripples generate in commutation periods of brushless DC motors. First of all, a relative accurate prediction is acquired through DC motor on-line parameter corrections based on generalized predictive control algorithms. Then rolling optimizations make tracking errors and control qualities optimized for best control effects. And finally, minimum electromagnetic torque ripples are achieved. The simulation results show that torque ripples can be suppressed effectively with improved reliabilities by using the method proposed.

Implementation of PWM control strategy for torque ripples reduction in brushless DC motors

2015 ◽  
Vol 97 (3) ◽  
pp. 239-250 ◽  
Author(s):  
Wael A. Salah ◽  
Dahaman Ishak ◽  
Basem Abu Zneid ◽  
Amir Abu_Al_Aish ◽  
Mohd Shawal Jadin ◽  
...  
Keyword(s):  
Control Strategy ◽  
Pwm Control ◽  
Brushless Dc Motors ◽  
Brushless Dc ◽  
Dc Motors ◽  
Torque Ripples

scholarly journals Electromagnetic Torque Ripple Reduction In Brushless Dc Motors

2008 ◽  
Vol 13 (1) ◽  
pp. 45-54
Author(s):  
José Roberto B. de A. Monteiro ◽  
Azauri Albano de Oliveira Jr. ◽  
Manoel Luis de Aguiar ◽  
Diógenes Pereira Gonzaga ◽  
Carlos Dias Maciel
Keyword(s):  
Torque Ripple ◽  
Electromagnetic Torque ◽  
Brushless Dc Motors ◽  
Brushless Dc ◽  
Dc Motors ◽  
Torque Ripple Reduction ◽  
Ripple Reduction

scholarly journals Sensorless BLDC motor controller little power to the comfort of motor vehicles

2018 ◽  
Vol 19 (6) ◽  
pp. 708-711
Author(s):  
Emil Sadowski ◽  
Artur Pakosz
Keyword(s):  
Low Power ◽  
Supply Voltage ◽  
Motor Vehicles ◽  
Bldc Motor ◽  
Brushless Dc Motors ◽  
Brushless Dc ◽  
Dc Motors ◽  
Speed Up ◽  
Control Modules ◽  
And Control

The article discusses low-power brushless motors and control modules that are used, among others, in trucks and buses. Also presented are methods of controlling brushless DC motors. The own low power controller was also implemented, enabling smooth start-up and control of the engine speed up to 3,000 revolutions and supply voltage up to 32V DC. This article also presents the results of the measurements of BLDC motor control used in automotive vehicles, mainly in trucks and buses.

Brushless DC Motors with a Three-Section Winding and Two Inductors

2021 ◽  
Vol 1 (1) ◽  
pp. 55-60
Author(s):  
Vladimir M. GRIDIN ◽  
Keyword(s):  
Magnetic Induction ◽  
Power Source ◽  
Air Gap ◽  
The Other ◽  
Electromagnetic Torque ◽  
Bldc Motor ◽  
Brushless Dc Motors ◽  
Brushless Dc ◽  
Power Transistors ◽  
Dc Motors

Two brushless DC motors (BLDC) with a three-section armature windiщ and two cylindrical inductors-magnets are considered. One motor has an ordinary drum-type armature windiщ, and numbers of radial poles in its two inductors differ from each other by a factor of three. The other motor has a toroidal armature winding, and the numbers of radial poles in its two inductors differ from each other by a factor of two. An expression for the distribution of the resulting armature winding magnetic induction over the air gap circumference is given. The optimal relationships between the parameters of two inductors are determined. Expressions are obtained for the ratios of the electromagnetic torques of the considered motors and for the known BLDC motor with a conventional three-section armature winding and a composite inductor consisting of an inner magnetically soft bushing and external poles formed by magnets. The compared machines have the same number of power transistors and are made with the same dimensions of their electromechanical parts, and their armature windings consume the same power from the power source. It has been found that the electromagnetic torque in the considered motor with the ordinary armature winding is approximately a factor of 1.37 greater than in the known motor with a three-section armature winding, whereas in the motor with a toroidal armature winding it is smaller by about a factor of 1.1, i.e., insignificantly. However, the electromagnetic torque pulsation in the motor with a toroidal winding and three power transistors is approximately 3%, whereas in the known motor with three and six power transistors its values are approximately equal to 8 and 4.5%, respectively. The considered motors with simpler cylindrical inductors can compete with the known BLDC motors.

Design and Research of a Sliding Mode Observer Based on Line Back-EMF for Brushless DC Motors

2014 ◽  
Vol 615 ◽  
pp. 11-17
Author(s):  
Lai Cai Ju ◽  
Zi Qiang Wang ◽  
Meng Yu He
Keyword(s):  
Sliding Mode ◽  
Sliding Mode Observer ◽  
External Disturbances ◽  
Position Information ◽  
Brushless Dc Motors ◽  
Brushless Dc ◽  
Dc Motors ◽  
Position Signal ◽  
Three Phase ◽  
On Line

This paper designs and implements a sliding mode observer with line-to-line trapezoidal back-EMF for brushless DC (BLDC) motor. Through the detection of three phase voltage and the current, the phase to-phase back-EMF is observed, and then the position signal and the rotor speed are estimated. The corresponding relationship between back-EMF and six rotor positions of the motor is established in this paper. With saturation function instead of sign function, the line current difference is used as the sliding surface. The whole control system employs an inner current PI loop with an outer speed PI loop. Simulation results show that the designed observer can correctly estimate the position information and speed, with strong robustness to changes of system parameters and external disturbances.

An Adaptive Speed Control Approach for Sensorless Brushless DC Motors

2014 ◽  
Vol 1070-1072 ◽  
pp. 1202-1205
Author(s):  
Fu Cheng Cao ◽  
Ji Xia Shi
Keyword(s):  
Brushless Dc Motor ◽  
Bldc Motor ◽  
Brushless Dc Motors ◽  
Control Approach ◽  
Brushless Dc ◽  
Speed Controller ◽  
Dc Motors ◽  
Torque Ripples ◽  
Model Reference Adaptive ◽  
Novel Model

This research presents a new adaptive speed controller for the brushless DC motor. Themethodology of model reference adaptive control is applied to a novel model of BLDC motor. Thisnovel model provides the possibility to compensate the torque ripples and load torque.

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