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Unformatted text preview: Lecture Set 2 Energy Conversion S.D. Sudhoff Spring 2012 Reading • Techniques for Analysis of Electromechanical Systems h Section 5.1.15.1.9 ee course web page 2 h See course web page Overall Goal • We know how to h (1) flux linkage in terms of current and position h (2) current in terms of flux linkage and position 3 • Using either (1) or (2), we can find an expression for force or torque for an electromechanical device ! No other information needed. Magnetic System Descriptions • For single winding systems, we may describe our magnetics (ignoring hysteresis) with one of the following orm 1: 4 h Form 1: h Form 2: ) x , ( f i λ λ = ) x , i ( f i = λ Magnetic System Descriptions • For multiwinding systems, we may describe our magnetics (ignoring hysteresis) with one of the following h Form 1: 5 h Form 2: • Form 2 is most common for both single and multiwinding systems ) x , ( λ f i λ = ) x , ( i i f λ = Field Energy • Physical definition of the coupling field… 6 • Energy into the coupling field m e f W W W + = Field Energy • To find the field energy we will assume a lossless field plications 7 h Implications h Concerns Field Energy 8 Field Energy 9 • Thus ∫ ∑ ∫ = = f f , j , j x x e J j j j f dx f d i W 1 λ λ λ Calculation of Field Energy • A mathematical experiment …....
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 Spring '08
 Staff
 Flux, Magnetic Field, Field Energy, Linear Magnetic Systems

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