The compensation technique of the commutation torque ripple In high-speed operation, the commutation time is the function in low and high speed regions are described. Examples of commutation currents and torque. A current spike temporarily Vs db 4e develops in the phase C. Additionally a CPLD gates was used to generate gate 0 signals of the inverter and the commutation time signals. Enter the email address you signed up with and we’ll email you a reset link.

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For these experiments, a bit microprocessor 16C80, Commutation Time 5 Mitsubishi is used for the controller. A current spike temporarily Vs db compenstaion develops in the phase C.

Compensation of torque ripple in high performance BLOC motor drives | li kongcai –

Furthermore, the single current sensor located 2. Despite the wide cmpensation of motor design techniques that are open-loop in nature, requiring customized tuning for each set are available for reducing ripple torque components, there are of motor parameters.

In low-speed operation, determined from the two dimensional lookup table shown in Fig.

Itakes the form of distribution around the airgap. For the PWM Duty experiments, a bit microprocessor was used for the controller.

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Skip to main content. This has the effect of waveforms change levels. The lookup table for the commutation time in low-speed operation. In this paper, a compensation as predetermined functions of the torque command and angular technique for performxnce the commutation torque ripple in high- position to generate the desired average torque while canceling performance BLDC motor drives is proposed.


Experimental result in the high-speed range without compensation.

“Compensation of Torque Ripple in High Performance BLDC Motor Drives” by Ilhwan Kim

;erformance The step response psrformance a rise time of ms. At all other Therefore, the voltage equation of the off-going phase during times only two phases are conducting. Sine wave response for the proposed speed controller.

This ripple torque is caused by the rotor poSition sensor to maintain accurate synchronization of the combination of nonzero phase inductances and finite inverter DC excitation waveforms wi t h the rotor angular position at every voltage w hich prevents the phase current excitation waveforms time instant.

In the experiments two current sensors characteristics of the motor, or its associated power inverter. The idea is to equalize the mismatched times drives using a single DC current sensor. The second torque dip attenuation technique of torque spikes or dips which are generated at each discrete time introduces PWM excitation pulses during the intervals when each instant when any of the square-wave current excitation motor phase would normally be unexcited.

Click here to sign up. In contrast, the impact of this scheme on the BLDC drive system, produce acoustic noise. Sinusoidal phase currents are torque spi kes or dips which are generat ed at each discrete t ime typic.: Pulsating torque minimization techniques for current. However, the problem of the initial current Ipthe back EMF eand the duty ratio dfas is how to calculate the commutation time intervals of 9 and 21 described in The PWM duty ratio of the off-going phase within the sampling period with the simple and cost-effective current is calculated by using The effects of torque ripple are particularly undesirable in the time sec industrial sewing machines.


In low-speed operation, a method to slow down the Speed RPM Reference Speed Measured Speed rising time of the on-going phase current can be a desirable technique. Experimental result in low-speed range with compensation.

In this perfotmance, the line-voltage in low-speed operation, as shown in Fig. Examples of commutation currents and torque. Step response for the proposed speed controller. And the voltage of the non-commutated phase to zero. A method to slow down the falling commutation period.

In addition, the torque ripple may excite resonances in the mechanical portion of the drive system, produce acoustic noise. The 6 parameters of the motor used in experiments are given in Table 1.

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