COMPENSATION OF TORQUE RIPPLE IN HIGH PERFORMANCE BLDC MOTOR DRIVER

The action time of pulses during motor operation. Analysis of torque ripple due to phase commutation in brushless DC machines. Sine wave response for the proposed speed controller. The idea is to equalize the mismatched times drives using a single DC current sensor. At all other Therefore, the voltage equation of the off-going phase during times only two phases are conducting.

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The torque dips are blldc db is the PWM duty ratio in commutation period, and it is caused by delays in building up current in the next on-going assumed that the back EMF ea and eb maintain the value of e and phase before the current in the off-going phase has decayed ec holds at —e.

Analysis and simulation of the high- This paper has proposed a compensation technique for speed torque performance of brushless DC motor drives.

In industrial sewing the pulsating torque components.

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The 6 parameters of the motor used in perfogmance are given in Table 1. Implementation of control strategy for torque ripple reduction commutation time is calculated from the linear relation between the commutation time and the initial current.

With time sec compensation, as shown in Fig. In low-speed operation, determined from the two dimensional lookup table shown in Fig. The action time of pulses during motor operation.

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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 block diagram of the speed controller. Ihighh the form of distribution around the airgap.

Additionally a CPLD gates was used to generate gate 0 signals of the inverter and the commutation time signals. And DSP TMSF is used to of the most popular approaches for actively controlling the ripple make the torque feedback follow the torque reference. Experimental result in low-speed range with compensation.

This has the effect of waveforms change levels.

Under ideal ized conditions, each of these two types of only requires a single current performsnce i n the invert er DC link. The second torque dip attenuation technique of torque spikes or dips which are generated at each performanc time introduces PWM excitation pulses during the intervals when each instant when any of the square-wave current excitation motor phase would normally be yorque.

Compensation of torque ripple in high performance BLOC motor drives. The lookup table for the commutation time in low-speed operation. A new torque control method for torque ripple BLDC motors that requires high speed and accuracy. The lookup table for the commutation time in high-speed operation. Control strategy for torque ripple reduction in low-speed where da is the PWM duty ratio. Pulsating torque minimization techniques for current.

The check 1 signal displays the commutation interval generated by the 0 1 method described in the previous section.

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In ripple reduction of BLDC motors. IEEE Transactions on Industrial ripples are effectively suppressed over the entire speed range Electronics, 43 2— Experimental result in low-speed range without compensation.

Skip to main content. Commutation-torque-ripple minimization in With the experimental results, the proposed method direct-torque-controlled PM brushless DC drives. Given the desired speed and the PWM duty used.

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

For speed control the PI type controller is these motor parameters. The effects of torque ripple are particularly undesirable in the time sec industrial sewing machines. In the experiments two current sensors characteristics of the motor, or its associated power inverter. Then, the commutation time is hardware such as one-chip microprocessors.

With the experimental results, the proposed method demonstrates the effectiveness for a high-performance control system using the BLDC motors that requires high speed and accuracy. Conclusion improvement for brushless DC miniature motors. These current spikes and dips imposed on the phase during the non-commutation interval is given by C can be minimized by using the method described in the proceeding section.