Abstract
Axial flux hysteresis motor (AFHM) is self-starting synchronous motor that uses the hysteresis characteristics of magnetic materials. It is known that the magnetic characteristics of hysteresis motor could be easily affected by air gap and structure dimensions variation. Air gap length plays an important role in flux distribution in hysteresis ring and influences the output torque, terminal current, efficiency and even optimal value of other structural parameters of AFHM. Regarding this issue, in this study effect of air gap variation on performance characteristics of an axial flux hysteresis motor and effect of air gap length on hysteresis ring thickness and stator winding turns is investigated. Effect of air gap length on electrical circuit model is perused. Finally, simulation of AFHM in order to extract the output values of motor and sensitivity analysis on air gap variation is done using 3D-Finite Element Model. Hysteresis loop in the shape of an inclined ellipse is adopted. This study can help designers in design approach of such motors.
Highlights
The main features of hysteresis motor are Simple construction with conventional three phase stator windings, solid rotor ring and constant self-starting torque during the run-up and synchronization period [1]
It is known that the magnetic characteristics of hysteresis motor could be affected by air gap and structure dimensions variation
In this study effect of air gap variation on performance characteristics and optimal hysteresis ring thickness and stator coil turns of axial flux hysteresis motors is investigated
Summary
The main features of hysteresis motor are Simple construction with conventional three phase stator windings, solid rotor ring and constant self-starting torque during the run-up and synchronization period [1]. It is known the magnetic characteristics of the motor could be affected by air gap length and structure dimensions variations [3,4,5] Regarding this issue, in this study effect of air gap variation on performance characteristics and optimal hysteresis ring thickness and stator coil turns of axial flux hysteresis motors is investigated. The objective of this paper is to derive the performance characteristics of axial flux hysteresis motor and to perform sensitivity analysis of such motors at synchronous speed based on 3D FEM. This model can be used in the design approach and precise analysis of axial flux hysteresis motors
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