Description
The operation and simulation of a.c. and d.c. machines and a large number of variable-speed drives, including some of the most recently introduced modern drives, are discussed here, and a general theory applicable during their steady-state and transient operation is presented. Although the mathematical analysis given relies mainly on spacevector theory, the relationship to other theories, including the matrix theory of generalized machine theory, is also emphasized. Many of the equations are given in their state-variable or analytical forms so that they can be used directly for computer simulations or for hand calculations. Special features of this book include – the “exact” and “simplified” performance analysis of a.c. machines and a large number of variable speed drives are described; both the large – and small-signal equations are given; the effects of magnetic saturation are incorporated into the different models of smooth-air-gap and salient-pole machines; the space-vector model is extended to the double-cage induction machine and the salient-pole synchronous machine; it is demonstrated how all the various machine models used in the matrix model of electrical machines can be obtained from the simple space-vector model without having to use matrix transformations; a systematic approach is given for the a priori deduction of all the transformtions used in generalized machine theory; and permanent-magnet machines both with surface-mounted and with interior magnets are discussed. “Electrical Machines and Drives” can be used without any prior knowledge of space-vector or other theories; it is aimed at students, teachers, and those researching in industry and universities, who require an understanding of the various aspects of the operation and the theories of electrical machines and drives and their simulation.
