Chen, "Sliding mode control for torque ripple
reduction of an electric power steering system based on a reference model," Proceedings of the Institution of Mechanical Engineers D: Journal of Automobile Engineering, vol.
Because of the saliency of the stator and rotor, the torque ripple
is produced when the former phase is being excited opposite voltage and the latter phase has been excited.
The voltage and current total harmonic distortion and the torque ripple
rate are the main targets.
DC Servo none required Brushless DC Hall-based simple and inexpensive but may have greater torque ripple
sinusoidal smoother with less torque ripple
but more complex to implement Encoder Type Advantages and Disadvantages Incremental optical quadrature Low cost, very common, and accurate but not absolute.
Sealed ball bearings and reduced torque ripple
from skewed magetization also ensure a smooth operation at any speed.
The SRM's drive performance is strongly dependent on its design and control, which allows for torque ripple
reduction , or for improving of the torque-speed characteristics.
He covers the mathematical modeling and characteristics analysis of brushless direct-current motors, simulating motor drives, speed control for motor drives, analyzing and reducing torque ripple
, sensorless control of motor drives, and realization of drives.
Nevertheless, if the drive system design allows torque ripple
reduction, these structures remain attractive if moderate performances are tolerated.
The Darrieus, which resembles an eggbeater, is more efficient, but prone to torque ripple
and cyclic stress on the tower, conditions that can hinder reliability.
Hu, "An investigation of a modified direct torque control strategy for flux and torque ripple
reduction for induction machine drive system with fixed switching frequency" IEEEIAS, pp.
An optimized torque ripple
and a stall torque between 0.8 and 52.5 Nm fulfills all requirements for sophisticated motor solutions.
has been reduced by multiphase winding and cooling characteristics improved by segmented design.