EPE Association: EPE 1995 - 01 - Lecture Session L1a: MAGNETICS

EPE 1995 - 01 - Lecture Session L1a: MAGNETICS
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   HYSTERESIS MODELING TAKING INTO ACCOUNT THE TEMPERATURE
By P. Tenant; JJ. Rousseau; L. Zegadi [View]
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Abstract: Both hysteresis and dynamic phenomena must be taken into account in the modeling of magnetic materials. However, in the case of soft ferrites, this is not sufficient. Indeed; temperature is an important parameter because it changes the magnetic characteristics greatly. We are working on a behavioral model aimed at predetermining both the magnetic and electrical characteristics of magnetic components. This model uses the Preisach model in order to generate hysteresis loops. The Preisach model deteriorates for low peak flux density, i.e specifically in the field of application of soft ferrites. Improvements have been brought to it and have allowed us to obtain better predictions of hysteresis loops. By means an analysis of some magnetic data versus temperature, we have simply introduced the latter in the Preisach model. Results are promising.

   Optimal Design of Transformers for High-Power High-Frequency Applications
By O. Apeldoorn; K. Kriegel [View]
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Abstract: In most modem power electronic circuits, transformers are used to transfer energy. The size of the transformer is decreased by an increase of its operation frequency. As a consequence a very efficient point of operation is required in order to control the transformer temperature at its point of operation. In this paper a method to obtain the optimal and feasible layout for a high-frequency high-power transformer is presented. The increase of losses due to the skin and proximity effect are calculated. Also the hysteresis losses of the core are included to find the optimal transformer layout. A 10 kW 1 20 kHz transformer has been designed and tested. Its losses were determined with a calorimetric method. The results are compared with the predicted values.

EPE 1995 - 01 - Lecture Session L1a: MAGNETICS
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1995 - Conference > EPE 1995 - 01 - Lecture Session L1a: MAGNETICS
	[return to parent folder]

	HYSTERESIS MODELING TAKING INTO ACCOUNT THE TEMPERATURE By P. Tenant; JJ. Rousseau; L. Zegadi	[View] [Download]
Abstract: Both hysteresis and dynamic phenomena must be taken into account in the modeling of magnetic materials. However, in the case of soft ferrites, this is not sufficient. Indeed; temperature is an important parameter because it changes the magnetic characteristics greatly. We are working on a behavioral model aimed at predetermining both the magnetic and electrical characteristics of magnetic components. This model uses the Preisach model in order to generate hysteresis loops. The Preisach model deteriorates for low peak flux density, i.e specifically in the field of application of soft ferrites. Improvements have been brought to it and have allowed us to obtain better predictions of hysteresis loops. By means an analysis of some magnetic data versus temperature, we have simply introduced the latter in the Preisach model. Results are promising.

	Optimal Design of Transformers for High-Power High-Frequency Applications By O. Apeldoorn; K. Kriegel	[View] [Download]
Abstract: In most modem power electronic circuits, transformers are used to transfer energy. The size of the transformer is decreased by an increase of its operation frequency. As a consequence a very efficient point of operation is required in order to control the transformer temperature at its point of operation. In this paper a method to obtain the optimal and feasible layout for a high-frequency high-power transformer is presented. The increase of losses due to the skin and proximity effect are calculated. Also the hysteresis losses of the core are included to find the optimal transformer layout. A 10 kW 1 20 kHz transformer has been designed and tested. Its losses were determined with a calorimetric method. The results are compared with the predicted values.