Power losses in thick steel laminations with hysteresis

Power Losses in Magnetic Laminations with Hysteresis: Finite Element Modeling and Experimental Validation

Science Arts & Métiers (sam) Rindra Ramarotafika, Abdelkader Benabou, Stéphane Clenet -stochastic Jiles-atherton Model Accounting for Soft Magnetic Material Properties Variability -compel: the International

Industrial processing (cutting, assembly...) of steel laminations can lead to significant modifications in their magnetic properties. Moreover, the repeatability of these modifications is not usually verified because of the tool wear or, more intrinsically, to the manufacturing process itself. When investigating the iron losses, it is generally observed that the hysteresis losses contribution a...

The influence of laser scribing on magnetic domain formation in grain oriented electrical steel visualized by directional neutron dark-field imaging

The performance and degree of efficiency of transformers are directly determined by the bulk magnetic properties of grain oriented electrical steel laminations. The core losses can be improved by post manufacturing methods, so-called domain refinement techniques. All these methods induce mechanical or thermal stress that refines the domain structure. The most commonly used technique is laser sc...

Efficency Determination of a Brushless DC Motor Under Field Weakening Operation

This paper deals with the calculation of the efficiency for a Brushless DC Motor when used for traction applications in order to determine the optimum operating conditions which will meet EV requirements, particularly high speed efficiency. This usually involves the assessment of the drive losses: the inverter and the motor losses. In practice, the copper losses can be predominant at low speed,...

Monitoring Recovery and Recrystallization in Interstitial Free (IF) Steel by Magnetic Hysteresis Loop Measurements

In this paper, how structure-sensitive parameters derived from the hysteresis loop, like coercive field, remanent induction, and hysteresis losses, can be used to characterise recovery and recrystallization in cold rolled Ti-Nb stabilised interstitial free ultra low carbon steel is shown. The effect on hysteresis measurements of isothermal annealing treatments applied to industrially cold rolle...