Motor windings were placed with [pi]/6 radians phase difference to reduce torque ripple
and increase torque, 3 phase neutral voltage was shifted to changing timings of discharging from the capacitor to lower the RMS of the capacitor current, and the sum of the currents in two windings were directly controlled for high response torque control.
Comprehensively, performance was improved with sub-pole excitation design even though it has a negative concern of Torque ripple
GA based H -Infinity controller for SRM give minimum torque ripple
, low starting torque and low steady state error.
While the straight rotor cage provides the operation with amount of disruptive effects (cogging torque, torque ripple
, vibrations and noise) caused by unsuppressed air gap harmonics, the skewed rotor cage may reduce them significantly.
This is due to the number of pole pairs of the motor which, together with the magnets, is responsible not just for the rotational motion but also for the torque ripple
Research on torque ripple
suppression method for BLDCM speed control system.
It is found that the torque ripple
from the driving motor is the root cause of the low speed vehicle vibration in EV mode, and the torque ripple
is found to be induced by the current distortion resulted from the current sensor drift and electromagnetic interference due to high current signals.
3), a voltage imbalance that increases the torque ripple
and a significant reduction in motor power.
Cogging torque and torque ripple
are some of the most important performance indicators in the design of electrical machines.
During slow operation, the lack of torque ripple
has a positive effect.
Many of these applications require minimum torque ripple
, and reduced vibration and acoustic noise that urge the development of different control strategies [1-4].
Cogging torque ripple
is produced by interaction between rotor magnetic field and stator slots.