Investigation of Slim Type BLDC Motor Drive with Torque Ripple Minimization using Abridged Space-Vector PWM Control Method

Brushless DC (BLDC) motors are becoming an increasingly popular motor of choice for its unique characteristics. The BLDC motor drive is assumed to have trapezoidal back-electromotive force (EMF), rectangular phase currents and together produces the desired torque. However, practical back-EMF waveform might not be exactly trapezoidal because of current ripple, design considerations and manufacturing limitations. The adverse effect is the torque ripple generated due to the current ripple that causes mechanical vibration, acoustic noise and affects the accuracy of speed and position control which is not desirable in motor operation. In this paper an algorithm is developed to control and minimize the generated torque ripple using Space Vector Pulse Width Modulation (SVPWM) scheme. The efficiency improvement of slim type BLDC motor is confirmed using MATLAB environment and low cost TI Piccolo F28035 microcontroller (MC).

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Torque Ripple Reduction in Brushless DC Motor by Using SPWM and SVPWM Techniques

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i4.24.21858 ◽

2018 ◽

Vol 7 (4.24) ◽

pp. 71

Author(s):

Ch.N. Narasimha Rao ◽

G. Durga Sukumar ◽

R. Vinod Kumar

Keyword(s):

Pulse Width Modulation ◽

Control Method ◽

Fuzzy Controller ◽

Torque Ripple ◽

Bldc Motor ◽

Space Vector Pwm ◽

Space Vector ◽

Brushless Dc Motors ◽

Frequency Space ◽

Brushless Dc

Brushless DC motors have the large applications because of its easiest control system and the highest efficiency. Industrial BLDC motor drives suffers from the ripples in the torque, due to which motor has more noise, vibrations and less efficient. To reduce the ripple, the Space Vector PWM (SVPWM) and Sinusoidal PWM are implemented in BLDC drive. The Pulse Width Modulation (PWM) controls the converter output voltage and frequency. Space Vector PWM (SVPWM)and Sinusoidal PWM are the best techniques used in industries because its easy design. Space Vector PWM control method is implemented and it overcomes the disadvantages in PWM such as losses in switching of the converter, output harmonic content& provides better DC-bus voltages. The torque ripples are also reduced in SVPWM method compared to SPWM method. In this paper BLDC motor with a fuzzy controller is presented and the comparison in performance of SVPWM &SPWM methods presented. The SVPWM makes the drive has less ripple in torque& noiseless operation. The Matlab/Simulink models of SVPWM and SPWM method with fuzzy controlled BLDC motor also presented.

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Acoustic Noise Reduction of BLDC Motor Drive Using One-Cycle Current Control Strategy

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.704.385 ◽

2014 ◽

Vol 704 ◽

pp. 385-389

Author(s):

Hassan Moghbelli ◽

Abolfazl Halvaei Niasar ◽

Ehsan Boloor Kashani

Keyword(s):

Control Strategy ◽

Acoustic Noise ◽

Torque Ripple ◽

Position Estimation ◽

Current Control ◽

Motor Drive ◽

Bldc Motor ◽

Constant Frequency ◽

Noise And Vibration ◽

Brushless Dc

Torque ripple and resulted acoustic noise and vibration are the main disadvantages of brushless DC (BLDC) motor drives. In this study, One-Cycle Control (OCC) is developed for current regulation of brushless DC (BLDC) motor drive as a unified constant-frequency integration control strategy. Employing one-cycle control strategy reduces high frequency torque ripple of conventional hysteresis current controllers leading to lower acoustic noise and vibration in the drive. To enhance reliability and reducing drive cost, an improved rotor position estimation technique is implemented. OCC strategy and sensorless method are realized using a low-cost general-purpose AVR microcontroller (Atmega8). It is shown that torque ripple, acoustic noise and vibration are reduced via OCC method comparing to conventional hysteresis control strategy. Computer simulations and experimental results with a 375W, 16 poles BLDC motor, demonstrate improved behavior of developed sensorless BLDC drive operation.

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