Hysteresis motor using heat treated Fe-Cr-Ni-Mo-C steel alloy

Abstract

Hysteresis motors are exciter less synchronous machines, which have found wide applications in sub fractional horse power ratings. These motors have some favorite features such as constant torque, low startup current and noiseless operation. However, low efficiency and low power factor are common deficiencies of the hysteresis motors, which should be rectified using more suitable rotor substance and having accuracy in design considerations as possible. In general, magnetic property of the rotor material has the most important and plays a key role in the hysteresis motors performance. In this paper, electromagnetic characteristics of a steel alloy which contains iron, chrome, nickel, molybdenum, and carbon (Fe-Cr-Ni-Mo-C) are presented and application of this steel alloy for rotor of hysteresis motors is investigated. Magnetic properties of Fe-Cr-Ni-Mo-C are compared with other common magnetic materials, used in the conventional hysteresis motors. The results confirm eligibility of Fe-Cr-Ni-Mo-C rather than others.