Improvement of Torque Characteristic of Flux-Concentration-Type Surface Permanent Magnet Motors

Permanent Magnet Linear Transverse Flux Motors

The transverse flux machines (TFM), introduced at the beginning of the 80’s, are possible solutions for diverse applications requiring special electrical machines [1]. The researches have focused until now mainly on rotary TFMs. A new type of permanent magnet linear transverse flux reluctance machine is proposed here. Such machines can be successfully applied for example in conveyor application...

Direct Torque Control of Permanent Magnet Synchronous Motors

Pulsating Torque Reduction for Permanent Magnet AC Motors

Control methods for pulsation of torque reduction for the surface-mounted permanent magnet motors are discussed in the paper. The pulsation torque is a consequence of the non-sinusoidal flux distribution and due to interaction of the rotor’s permanent magnets with the changing stator reluctance. Proposed control method is estimator based. To assure parameter convergence Lyapunov’s direct method...

Cogging Torque Reduction of Sandwiched Stator Axial Flux Permanent Magnet Brushless DC Motor using Magnet Notching Technique

Cogging torque reduction of axial flux permanent magnet brushless dc (PMBLDC) motor is an important issue which demands attention of machine designers during design process. This paper presents magnet notching technique to reduce cogging torque of axial flux PMBLDC motor designed for electric vehicle application. Reference axial flux PMBLDC motor of 250 W, 150 rpm is designed with 48 stator slo...

Traction Permanent Magnet Synchronous Motor Torque Control with Flux Weakening

The paper deals with analysis of dynamic behavior of a feedback flux weakening control of PMSM traction drive for light vehicles. The PMSM flux weakening is very important for traction drives. Two torque control structures were analyzed pure feedback control and feedback control with prediction of the field producing current component. The principles, control structures, simulation and experime...