By Jingde Gao

ISBN-10: 3642011527

ISBN-13: 9783642011528

"AC laptop structures" stresses either research tools and working performances of AC computing device platforms, together with variable pace force method of AC machines with strength electronics and regulate units, energy power procedure composed of AC machines and gear traces, exact desktop process with designated machines and distinct lots, electrical computing device procedure together with AC machines and excitation units. in response to a unmarried coil, the Multi-Loop concept is carefully defined, and examples of the way to exploit the recent method are offered. This e-book presents a brand new approach for interpreting the AC laptop structures. This e-book is designed for the researchers and postgraduates within the box of electrical machines and regulate. it is also a reference booklet for comparable technicians. This publication is written in reminiscence of Professor Jingde Gao, past-president of Tsinghua collage, Member of chinese language Academy of Sciences. one other authors, Linzheng Zhang and Xiangheng Wang either are Professors in electric Engineering Dept. of Tsinghua college.

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**Extra resources for AC Machine Systems: Mathematical Model and Parameters, Analysis, and System Performance**

**Example text**

33) where k and j are the certain values, the multiplier (k j ) or ( k j ) before the D· § angle ¨ J ¸ is even only, and there is also 2¹ © Odkk Oqkk 1 1 (O0 O2 k ) (O0 O2 k ) 2 2 O2 k Only when k is a positive integer, O2k has its value, otherwise O2 k 0 . , J D 0 , the mutual inductance reaches its extremum. e. 26), which accords with the physical concept. 35), the stator reference axis is the axis of coil AAc . If the reference axis is another axis, and the axis of coil AAc lags behind the new axis by D a electric angle, then J in the formulas should be replaced by ( J D a ).

15) When k is odd 2P ¦ (1) m 1 cos k[J c (m 1)S nT jM ] 2 P cos k (J c nT jM ) m 1 When k is fraction or even, the value of the above formula is zero.

1) as follows: Kc d cf c d cec The effect of saturation is researched by using this method based on fundamental wave magnetic circuit under normal operation. If the researched problem is related 35 AC Machine Systems to the instance with strong space harmonics of air-gap magnetic field, using this method will definitely lead to error. If needed, numerical calculation may be used to analyze the distribution of the magnetic field in terms of the loops and the magnetic field of the electric machine.

### AC Machine Systems: Mathematical Model and Parameters, Analysis, and System Performance by Jingde Gao

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