Read e-book online AC machine systems : mathematical model and parameters, PDF

By Jingde Gao

ISBN-10: 3642011527

ISBN-13: 9783642011528

ISBN-10: 3642011535

ISBN-13: 9783642011535

ISBN-10: 7302193428

ISBN-13: 9787302193425

"AC computing device platforms" stresses either research equipment and working performances of AC computing device platforms, together with variable pace force approach of AC machines with energy electronics and regulate units, strength strength method composed of AC machines and gear traces, certain computer procedure with distinctive machines and precise quite a bit, electrical computer method which includes AC machines and excitation units. according to a unmarried coil, the Multi-Loop conception is punctiliously defined, and examples of ways to exploit the hot strategy are provided. This booklet presents a brand new approach for reading the AC computer structures. This publication is designed for the researchers and postgraduates within the box of electrical machines and keep watch over. 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 University.

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Extra resources for AC machine systems : mathematical model and parameters, analysis, and system performance

Example text

Firstly, the self inductance of damping loop 11c is calculated. 12) where | k  j | 0, 2, 4,";| k  j | 2, 4," . 13) where | k  j | 0, 2, 4,";| k  j | 2, 4," . 14) 1 2 3 , , ,";| k  j | 0, 2, 4,";| k  j | 2, 4,"; normally, it is sufficient P P P to take the definite order of k , j , 2l . The mutual inductance between damping loops 11c and 22c is calculated in the following (see Fig. 5). 15) where | k  j | 0, 2, 4,";| k  j | 2, 4," ; x2 is the abscissa on the rotor and its origin is on the axis of damping loop 22c ; E 2 is the short pitch ratio of damping loop 22c .

10). e. the above formula is the expression of j - th harmonic flux density produced by d-axis k - th harmonic mmf when the axis of the damping loop11c and the rotor d-axis overlap each other. 28 1 Circuit Analysis of AC Machines — Multi-Loop Model and Parameters After getting the expression of the air-gap flux density, the flux-linkage of each loop is obtained, and the inductance of each loop will be gained. Firstly, the self inductance of damping loop 11c is calculated. 12) where | k  j | 0, 2, 4,";| k  j | 2, 4," .

As an example, the mutual inductance of the first coil and j -th coil on stator is M ( j) M 0 ( j )  M 2 ( j ) cos 2(J  D ( j )) where j 1, 2," , Z1 ( Z1 is stator slot number). When j 1 , the mutual inductance becomes self inductance. 3 shows M 0 ( j ) obtained by two methods (including the inductance M 0G ( j ) related to air-gap magnetic field and leakage inductance M 0l ( j ) ). When the electromagnetic field of the whole electric machine is calculated, the cell number is taken as 3132, the node number is 1621.

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AC machine systems : mathematical model and parameters, analysis, and system performance by Jingde Gao


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