Commutating Current Modulation Method of Brushless Direct Current Motor under Non-ideal Back Electromotive Force

다국어 초록 (Multilingual Abstract)

A phase current modulation method that suppresses commutating torque pulsation of brushless direct current motor under non-ideal back EMF was proposed to solve commutating toque ripple problem. This method calculates the duty cycle and commutation time by acquiring the line voltage in real time, and controls the modulation of diff erent duty cycles of the power device to ensure that the on-phase and off -phase current changes at the same rate during commutation, and fi nally suppresses non-commutation phase current pulsates. It assures the consistent change rate of conducting-phase and shut-off phase currents at commutation, and thereby suppresses non-commutation torque ripple. Moreover, the proposed method realized indirect observation of non-ideal back EMF through real-time acquisition of line voltage, which prevents the diffi culty and poor accuracy of observation of back EMF. Comparing with phase current modulation method considering armature resistance, the proposed method can control non-commutation current control at the commutation moment more accurately.
The experimental results show that the phase current ripple coeffi cient is only 11.1% at 1000r/min and 13.9% at 2000 r/min, while the phase current ripple coeffi cient under contrast method control is 15.3% at 1000r/min and 19.4% at 2000r/min. The ripple of non-commutation current and commutation torque is smaller at the commutation moment.

참고문헌 (Reference)

1 Xia C, "torque ripple reduction in brushless DC drives based on reference current optimization using integral variable structure control" 61 : 738-752, 2014

2 Park JS, "Unbalanced ZCP compensation method for position sensorless BLDC motor" 34 : 3020-3024, 2019

3 Fang J, "Torque ripple reduction in BLDC torque motor with nonideal back EMF" 27 : 4630-4637, 2012

4 Zhang L, "Torque direct control method for BLDC motors with non-ideal back EMF waveforms" 47 (47): 1570-, 2007

5 Chen S, "Sensorless startup strategy for a 315-kW high-speed brushless DC motor with small inductance and nonideal back EMF" 66 : 1703-1714, 2019

6 Nam K, "Reducing torque ripple of brushless DC motor by varying input voltage" 42 : 1307-1310, 2006

7 Lin Y, "Pulsewidth modulation technique for BLDCM drives to reduce commutation torque ripple without calculation of commutation time" 47 : 1786-1793, 2011

8 Jahns TM, "Pulsating torque minimization techniques for permanent magnet AC motor drives-a review" 43 : 321-330, 1996

9 Shi J, "New method to eliminate commutation torque ripple of brushless DC motor with minimum commutation time" 60 : 2139-2146, 2013

10 Yang L, "Investigation of a stator-ironless brushless DC motor with non-ideal back EMF" 7 : 28044-28054, 2019

11 Xia C, "Implementation of fi nite-state model predictive control for commutation torque ripple minimization of permanent-magnet brushless DC motor" 60 : 896-905, 2013

12 Carey KD, "Hybrid fi eld oriented and direct torque control for sensorless BLDC motors used in aerial drones" 12 : 438-449, 2018

13 Ho Z, "Extracting DC bus current information for optimal phase correction and current ripple in sensorless brushless DC motor drive" 15 : 312-320, 2014

14 Hu HJ, "Drive circuitbased torque-ripple suppression method for single-phase BLDC fan motors to reduce acoustic noise" 13 : 881-888, 2019

15 Maharajan MP, "Design of speed control and reduction of torque ripple factor in BLDC motor using spider based controller" 34 : 7826-7837, 2018

16 Jiang G, "Commutation torque ripple suppression strategy for brushless DC motors with commutation time in multiples of PWM period" 2017

17 Li X, "Commutation torque ripple reduction strategy of Z-source inverter fed brushless DC motor" 31 : 7677-7690, 2016

18 Viswanathan V, "Commutation torque ripple reduction in the BLDC motor using modifi ed SEPIC and three-level NPC inverter" 33 : 535-546, 2017

19 Shi X, "Commutation force ripple reduction in a novel linear brushless dc actuator based on predictive current control" 39 : 1609-1620, 2011

20 Lei P, "Back EMF and fl ux observation based on single neuron adaptive PID and sensorless direct torque control for brushless DC motor" 18 : 69-75, 2014

21 Shi T, "A torque control strategy for torque ripple reduction of brushless DC motor with nonideal back electromotive force" 64 (64): 4423-4433, 2017

22 Kommula BN, "A novel scheme for torque ripple minimization of BLDC motor used in solar air conditioner" 100 : 2473-2483, 2018

23 Liu K, "A novel region-refi nement pulse width modulation method for torque ripple reduction of brushless DC motors" 7 : 5333-5342, 2019

24 Lu H, "A new torque control method for torque ripple minimization of BLDC motors with un-ideal back emF" 23 : 950-958, 2008

25 Lee Y, "A new method to minimize overall torque ripple in the presence of phase current shift error for three-phase BLDC motor drive" 42 : 225-231, 2019

26 Shi T, "A new approach of minimizing commutation torque ripple for brushless DC motor based on DC–DC converter" 57 : 3483-3490, 2010

27 Tan B, "A new approach of minimizing commutation torque ripple for BLDCM" 10 : 1735-, 2017

28 Dafang W, "A modulation method to decrease commutation torque ripple of brushless DC motors" 29 : 160-166, 2014

29 Zhiqiang Wang, "A New Three-Phase Current Modulation Method to Suppress the Commutation Torque Ripple of Brushless DC Motor" 대한전기학회 12 (12): 1925-1933, 2017