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Unformatted text preview: and electrical circuit equations). If, however, we think of the coupling net-work as being temporarily disconnected from the electrical and mechanical circuits, we can choose two independent variables, say (A, x), which through the terminal relations stipulate i andfe. Our choice of A and x is motivated by (3.1.9), which shows how incremental changes in these variables are related to incremental changes in the magnetic stored energy Wi. The evaluation of the change in W, when A and/or x are varied by finite amounts requires an integration of (3.1.9). This is a line integration through variable space. For the example being considered (Fig. 3.1.1) there are two independent variables (A, x); thus variable space is two-dimensional, as illustrated in Fig. 3.1.3. Independence of variables is indicated by orthogonality of axes. Suppose it is Fig. 3.1.3 Two-dimensional variable space. A-PDF Split DEMO : Purchase from www.A-PDF.com to remove the watermark...
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This note was uploaded on 02/10/2012 for the course MECE 4371 taught by Professor Liu during the Fall '11 term at University of Houston.
- Fall '11