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Three-dimensional (3-D) magnetic fluxes exist in rotating electric machines and T-joints of three-phase power transformers, and may cause local overheating in these devices. In this paper, 3-D magnetic properties of the core materials are measured by an improved 3-D magnetic property tester. First, the 3-D magnetization system is modeled by the voltage and flux linkage equations. Their parameters...
Noise suppression is one of the key issues to be solved in the design and application of the motor. Especially in larger motors, noise and vibration caused by the magnetostrictive effect of silicon steel accounted for a large proportion of the motor noise. This paper focuses on how to solve the problem of motor noise and vibration suppression caused by the magnetostrictive effect of silicon steel,...
Giant magnetostrictive actuators have the magneto-mechanical coupling characteristic when they are operating normally. This paper presents a dynamic magneto-mechanical strong coupled model for giant magnetostrictive actuators. According to the model and the measured magnetic characteristic of giant magnetostrictive material, the relation between the magnet field and the output displacement of an actuator...
When applying mechanical stress to giant magnetostrictive material Terfenol-D, the magnetization along the direction of the applied stress varies due to the reverse magnetostrictive effect, which is called Villari effect. A magnetostrictive vibration sensor, which converts mechanical energy to electric energy, can be designed based on this effect. The dynamic model of the sensor was founded based...
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