This paper presents a theoretical derivation and computer simulation of an optimal speed controller for a brushless dc motor using feedback from a linear model running in parallel with the inverter-fed model. The intent of the feedback from the linear model is to eliminate torque ripples from the inverter drive. A nonlinear model of such a motor, transformed into a linear model by a local diphe...

Abstract Pneumatic motors have several advantages and many robotics automation applications. The importance of the study is that it a cheap possible way to apply fixed displacement pneumatic with simple directional control valve used. purpose addition any traditional change motor be variable speed torque compared expensive systems such as proportional in industrial also included validated simul...

When a short-circuit fault occurs in phase, the faulty phase needs to be removed artificially from system because of loss capability generate torque. In this case, both current and phase-loss would additional torque ripples. study, novel fault-tolerant control strategy is introduced achieve low ripple operation five-phase permanent magnet synchronous motors with trapezoidal back electromotive f...

Two different external-rotor-internal-stator TORUS type axial flux PM machines can be derived based on the direction of the flux. In the first type of the TORUS machine, magnet driven flux enters stator and travels circumferentially along the stator core while in the second type the flux enters the stator and travels axially along the machine axis of rotation. The major differences between the ...

This paper presents a design methodology dedicated to multiphase Permanent Magnet Synchronous Machines (PMSM) supplied by Pulse Width Modulation Voltage Source Inverters (PWM VSI). Firstly opportunities for increasing torque density using the harmonics are considered. The specific constraints due to the PWM supply of multiphase machines are also taken into account during the design phase. All t...

A detailed investigation of sensorless control of induction motor at zero and very low speed based on injection of a pulsating high frequency voltage signal is presented. A sensing technique used to measure air gap flux position in a squirrel cage induction motor is based on the secondary effect of magnetic spatial nonlinearity caused by saturation of the stator laminations. The physical insigh...