Control of Electric Machine Drive System (IEEE Press Series by Seung-Ki Sul

By Seung-Ki Sul

A distinct method of sensorless keep an eye on and regulator layout of electrical drivesBased at the author's gigantic event and collaborative works with different industries, keep watch over of electrical computer force structures is choked with confirmed, applied, and validated principles that engineers can practice to daily difficulties within the box. initially released in Korean as a textbook, this hugely sensible up to date model beneficial properties the most recent details at the regulate of electrical machines and equipment, in addition to a brand new bankruptcy on sensorless keep an eye on of AC machines, an issue now not lined in the other publication.The ebook starts off by way of explaining the positive aspects of the electrical force procedure and tendencies of improvement in comparable applied sciences, in addition to the fundamental constitution and operation ideas of the electrical computer. It additionally addresses regular nation features and regulate of the machines and the transformation of actual variables of AC machines utilizing reference body concept so as to offer a formal starting place for the material.The middle of the e-book reports numerous keep watch over algorithms of electrical machines and gear converters, explaining energetic damping and the way to control present, pace, and place in a suggestions demeanour. Seung-Ki Sul introduces tips to improve the regulate functionality of the electrical machines, and the set of rules to discover the part attitude of an AC resource and to manage DC hyperlink voltages of strength converters. themes additionally coated are:Vector regulate keep an eye on algorithms for position/speed sensorless force of AC machines equipment for settling on the parameters of electrical machines and gear converters The matrix algebra to version a three-phase AC computer in d-q-n axes each bankruptcy good points workout difficulties drawn from real adventure. The publication additionally contains greater than three hundred figures and provides entry to an FTP web site, which gives MATLAB courses for chosen difficulties. The book's practicality and realworld relatability make it a useful source for execs and engineers eager about the examine and improvement of electrical laptop force company, business force designers, and senior undergraduate and graduate students.To receive teacher fabrics please ship an electronic mail to pressbooks@ieee.orgTo stopover at this book's FTP site to obtain MATLAB codes, please click this hyperlink: ftp://ftp.wiley.com/public/sci_tech_med/electric_machine/ MATLAB codes also are downloadable from Wiley Booksupport website at http://booksupport.wiley.com 

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Extra info for Control of Electric Machine Drive System (IEEE Press Series on Power Engineering)

Sample text

The high-speed elevator system, shown in Fig. 3, has following specifications. Answer the following questions. Rated speed: 240 m/min, 24 passengers (weight of payload: 1600 kg), maximum number of floor for movement: 30 floors Problems . . . 27 Distance between floors: 3 m Mass of counterweight: 3134 kg Mass of cage: 2345 kg Inertia of sheave: 95 kg-m2 Inertia of machine: 25 kg-m2 Diameter of sheave: 710 mm The mass of rope and inertia of the pulley on the cage can be neglected. The jerk profile at ascending operation is shown in Fig.

16 Gearless direct drive elevator system. as shown in Fig. 15, the four-quadrant operation in a torque–speed plane is necessary in these hoisting loads. In Fig. 16, a conceptual diagram of an elevator drive system is shown. As shown in the figure, the cage or car, where the passengers are, and a counterweight, whose weight is usually a half of the full weight of cage and passengers, are connected by a rope through the sheave of the traction machine driven by the electric machine. And by the rotation of the electric machine, the cage moves up or down.

4, the brush locates at the position, where the flux density is null. And through the commutator and the brush, the turn of the armature winding, whose polarity of the induced voltage is positive, is always connected to the positive terminal of the DC source feeding DC machine. The current flows in the armature winding, as shown in Fig. 4, induces a flux by the current itself. Because of the flux by armature current the spatial flux distribution, originally set by the excitation flux from the field winding current, is distorted.

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