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PROPERTIES OF THE CO-ENERGY FUNCTION FOR AC MACHINES WITH NON-LINEAR MAGNETIC CIRCUIT
To create equations of AC machines with
non-linear magnetic circuit Lagrange´s formalism can be used. A starting
point for this is the co-energy function. In the paper properties of the
co-energy function of most important types of AC machines are discussed.
Introducing equivalent magnetising currents as substitute variables, the
co-energy function can be rather easily foreseen. Qualitative analysis of
physical phenomena in a given type of machine is a base of it. An
approximation of the co-energy function for non-linear magnetic circuit is also
presented
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