scholarly journals Rotor Position Control of a Brushless DC (BLDC) Motor using Space Vector PWM Method

2019 ◽  
Vol 7 (5) ◽  
pp. 3391-3396
Author(s):  
G Sethulekshmy
Keyword(s):  
Position Control ◽  
Bldc Motor ◽  
Space Vector Pwm ◽  
Space Vector ◽  
Rotor Position ◽  
Brushless Dc

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

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.

scholarly journals PWM Switching Strategy for Torque Ripple Minimization in BLDC Motor

2011 ◽  
Vol 62 (3) ◽  
pp. 141-146 ◽  
Author(s):  
Wael Salah ◽  
Dahaman Ishak ◽  
Khaleel Hammadi
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Position Control ◽  
Torque Ripple ◽  
Experimental Results ◽  
Bldc Motor ◽  
Switching Strategy ◽  
Rotor Position ◽  
Output Torque ◽  
Torque Ripples

PWM Switching Strategy for Torque Ripple Minimization in BLDC Motor This paper describes a new PWM switching strategy to minimize the torque ripples in BLDC motor which is based on sensored rotor position control. The scheme has been implemented using a PIC microcontroller to generate a modified Pulse Width Modulation (PWM) signals for driving power inverter bridge. The modified PWM signals are successfully applied to the next up-coming phase current such that its current rise is slightly delayed during the commutation instant. Experimental results show that the current waveforms of the modified PWM are smoother than that in conventional PWM technique. Hence, the output torque exhibits lower ripple contents.

Modelling and Simulation of the 150° Conduction Mode Quasi Space Vector PWM Inverter Fed Permanent Magnet Brushless DC Motor

2015 ◽  
Vol 781 ◽  
pp. 241-244
Author(s):  
Yossawee Weerakamhaeng
Keyword(s):  
Permanent Magnet ◽  
Voltage Source ◽  
Modulation Scheme ◽  
Space Vector Pwm ◽  
Space Vector ◽  
Pwm Inverter ◽  
Brushless Dc ◽  
Three Phase ◽  
Permanent Magnet Brushless Dc ◽  
Conduction Mode

This paper presents an alternative space vector pwm scheme of 150o conduction mode for the three phase voltage source inverter (3PVSI) with the switching periods, of six switches, determined by the Quasi Space Vector (QSV) relevant to the rotor of the three phase Permanent Magnet Brushless DC(3PPMBLDC) Motor. Performance can be delineated through the dynamic model of 3PPMBLDC motor with the simulations of torque and speed characteristics when applied by 3PVSI with this modulation scheme.

scholarly journals Robust sensorless control of BLDC Motor using second derivative function of the sum of terminal voltages

2013 ◽  
Vol 10 (2) ◽  
pp. 275-291 ◽  
Author(s):  
Abdelali Boughaba ◽  
Mabrouk Chaabane ◽  
Said Benaggoune
Keyword(s):  
Position Control ◽  
Control Method ◽  
Sensorless Control ◽  
Initial Position ◽  
Second Derivative ◽  
Bldc Motor ◽  
Rotor Position ◽  
Derivative Function ◽  
Satisfactory Performance ◽  
Stator Resistance

This paper proposes a new sensorless control method for the speed and position control of a BLDC Motor. This sensorless drive technique calculates the commutations instants (duration of commutation) by deriving the sum of the terminal voltages of the motor (SigVi). Thus, it is possible to estimate the rotor position (and back EMF of the motor) by only using measurements of the stator line currents and voltages. The implantation of these detectors is easy and cheap. This method is quite robust across variations in stator resistance due to changes in temperature or frequency. With this method the motor can be started without needing the initial position of the rotor. This proposed method is validated through extensive simulations at different speeds, and a very satisfactory performance has been achieved.

scholarly journals Improvement of Back EMF & Minimization of Torque Ripple of BLDC Motor

2019 ◽  
Vol 5 (8) ◽  
pp. 1-7
Author(s):  
Anant Thakur
Keyword(s):  
Torque Ripple ◽  
Ideal Condition ◽  
Bldc Motor ◽  
Main Aspect ◽  
Zero Crossing ◽  
Rotor Position ◽  
Brushless Dc ◽  
Copper Loss ◽  
Wide Range ◽  
Torque Ripples

In Brushless DC (BLDC) motor minimized the torque ripple with the help of  electronically based commutators. When torque ripple is minimizes then copper loss is also minimizes. In this paper, our main aspect to decrease the torque ripples & improved the back emf of brushless dc (BLDC) motor. This paper shows that the torque produced by the BLDC motors with trapezoidal Back EMF is constant under ideal condition. Due to freewheeling torque ripples are produced which is reduced. In this paper rotor position is determined by the Zero Crossing Detection (ZCD) of back emf. Unlike old methods of calculating Back emf of the BLDC by creating a virtual neutral point, a complimentary method is used. This method provides a wide range of speed. A pre conditioning circuit is proposed to rectify the back emf at very low speed. The rotor position can be determined even in stand still condition to minimize the torque ripple and designed to overcome the disadvantages from other torque ripple decrease methods.

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

2017 ◽  
Vol 8 (2) ◽  
pp. 593 ◽  
Author(s):  
C. Bharatiraja ◽  
Shyam Babu ◽  
V. Krishnakumar ◽  
P. Sanjeevikumar ◽  
Nixon George
Keyword(s):  
Position Control ◽  
Control Method ◽  
Acoustic Noise ◽  
Low Cost ◽  
Mechanical Vibration ◽  
Torque Ripple ◽  
Motor Drive ◽  
Bldc Motor ◽  
Space Vector ◽  
Current Ripple

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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