By Ion Boldea, Syed A. Nasar
ISBN-10: 0849300045
ISBN-13: 9780849300042
Known as the workhorse of undefined, the appearance of energy electronics and advances in electronic regulate are remodeling the induction motor into the racehorse of business movement keep watch over. Now, the vintage texts on induction machines are approximately 3 a long time outdated, whereas more moderen books on electrical automobiles lack the mandatory intensity and element on induction machines.The Induction laptop instruction manual fills industry's long-standing desire for a complete treatise embracing the various complex elements of induction computing device research and layout. relocating steadily from easy to complicated and from normal to new wisdom, it contains a longer presentation of windings parameters as prompted through frequency and saturation, deals a whole account of normal and new trying out equipment, and devotes numerous chapters to the layout of variable-speed induction motors.With a coherence and consistency now not possible in contributed works, this instruction manual attracts at the authors' lengthy adventure within the box and takes complete good thing about its wealthy literature. The presentation of all kinds of induction machines whole with many numerical examples, electronic simulations, and layout pattern circumstances make the Induction laptop guide a accomplished, updated source perfect for either for working towards and pupil engineers.
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Extra resources for The Induction Machine Handbook
Example text
Therefore, the method of forces experienced by conductors in fields does not apply directly to rotary IMs with conductors in slots. 17). 2) moves with respect to the rotor with the relative speed nsr. ……….. 2) may be written as. 17 Traveling flux crossing the rotor cage loops (a), leakage and main fields (b) Consequently, with the cage bars in slots, according to electromagnetic induction law, a voltage is induced in loop 1 of the rotor cage and thus a current occurs in it such that its reaction flux opposes the initial flux.
4). 9) where J is current density and E is electric field. As the lamination thickness is small in comparison with its length and width, Jx contribution is neglected. 10) B0 = µ0H0 is the initial flux density on the lamination surface. ……….. 17) The iron permeability has been considered constant within the lamination thickness although the flux density slightly decreases. For good utilization of the material, the flux density reduction along lamination thickness has to be small. In other words βd << 1.
CONSTRUCTION ASPECTS OF ROTARY IMs Let us start with the laminated cores. 1. The magnetic cores The stator and rotor magnetic cores are made of thin silicon steel laminations with unoriented grain-to reduce hysteresis and eddy current losses. 2). The latter has radial channels (5-15 mm wide) between elementary stacks (50 to 150 mm long) for radial ventilation. Single stacks are adequate for axial ventilation. 1 Single stack magnetic core Single-stack IMs have been traditionally used below 100 kW but recently have been introduced up to 2 MW as axial ventilation has been improved drastically.
The Induction Machine Handbook by Ion Boldea, Syed A. Nasar
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