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In this paper, a novel current controlled space-vector pulse width modulation (CCSVPWM) technique for reducing torque ripple in a three-level neutral-point-clamped (NPC) inverter fed trapezoidal brushless direct current (BLDC) motor is proposed. In BLDC motor, the different current slew rates between switching-in and switching-out phase generate current ripple, further leading to the generation of...
Torque ripple seriously affects the performance of brushless DC machine (BLDCM). Analyzed the principle of current hysteresis controller reducing non-commutation phase current which made BLDCM system become more hysteretic, the precise model of BLDCM is difficult to obtain. The fuzzy-PID control based on current hysteresis controller was proposed to diminish torque ripple and overcome the shortcomings...
The paper analyzes the steady commutation process of the BLDC motor using PWM mode, confirms the commutation time to keep non-commutation phase current amplitude constant during commutation period by way of PWM in the period to implement the compensation control to eliminate commutation torque ripple under both low speed and high speed operation, investigates the effect by PWM mode on a three-phase...
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