2 edition of Slip-energy-recovery of an induction motor. found in the catalog.
Slip-energy-recovery of an induction motor.
1978 in Bradford .
Written in English
M.Sc. dissertation. Typescript.
|The Physical Object|
|Number of Pages||77|
Most applications involve single-quadrant loads operating in quadrant I, such as in variable-torque e. Flow Chart for Computation. Each of the motor drives is illustrated with an industrial application in detail at the end of chapters to enable readers to relate theory to practice. The authors point out that, with the proper control strategy, the PM motor and drive can be used to 1 improve the performance of the PM motor, 2 operate at maximum torque per amp, 3 provide field weakening to increase the speed range for constant power, and 4 shift the voltage phase to obtain the maximum torque at any speed. In certain smaller single-phase motors, starting is done by means of a shaded pole with a copper wire turn around part of the pole.
Construction and Principle of Operation. Cascade The speed of a pair of slip-ring motors can be controlled by a cascade connection, or concatenation. Chapter 8 addresses three alternate forms of machine equations: 1 linearized small-displacement formulation for operating point stability, 2 neglecting stator current transients for large-excursion transient studies, and 3 the voltage-behind reactance formulation. All rights reserved.
Principle of Operation of the Chopper. Various regulatory authorities in many countries have introduced and implemented legislation to encourage the manufacture and use of higher efficiency electric motors. With a VFD, the stopping sequence is just the opposite as the starting sequence. Frequency Controlled Induction Motor Drives. Evaluation of Control Characteristics.
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Steady-state analysis using fundamental and harmonic equivalent circuits, direct steady-state evaluation, and the use of a dynamic model with boundary-matching conditions is systematically developed in this chapter.
Some types of single-phase motors or synchronous motors can be advantageous in some situations, but generally three-phase induction motors are preferred as the most economical. Depending on the sophistication of the drive multiple auto-starting behavior can be developed e.
The chapter starts with the classical equations using machine variables and moves in the reference-frame evaluations. Another issue, although the reader is forewarned, structural and thermal issues as well as several loss mechanisms are not taken into consideration.
This imparts sufficient rotational field energy to start the motor. Converter Selection and Characteristics. About this title Electronic Control of Machines develops a systematic approach to motor drives. As the load torque increases beyond breakdown torque the motor stalls. The fundamental component of motor phase current is shown in the figure below.
On some drives the same pins are used for both VDC and mA and are selected via a jumper. Compare all 3 sellers About This Item We aim to show you accurate product information.
Other Chopper Circuits. Chopper-controlled dc motors are described in Chapter 4. The high-performance induction motor drive is considered from the control point of view in Chapter 8.
Four Quadrant Dc Motor Drive. Some single-phase split-phase motors that are designed for specific applications may have the connection between the primary winding and the start circuit connected internally so that the rotation cannot be changed. The principle of speed control of induction motors is introduced in Chapter 6.
However, resistor losses associated with low speed operation of WRIMs is a major cost disadvantage, especially for constant loads.
This chapter also addresses flux linkages, e. For teachers Overview Electric Motor Drives is a comprehensive book for seniors, graduates, and practicing engineers. The most common efficient way to control asynchronous motor speed of many loads is with VFDs.
Sensorless Control. Present day practice as well as recent research and development are covered.
The control strategy is based on feeding the slip power back to the rotor of a slip ring induction motor. The design aspects of the current-source drive control are considered in adequate detail. Volts-per-hertz control is simple, inexpensive, and open loop; the control does not require a speed feedback.
Ample dynamic simulation results are included to enhance the understanding of the PM synchronous motor drive operation. This book has been written so that it can be understood by general engineers, not just by experts in the field.
Readers can check the validity of their simulation software by correlating their findings with the simulation results given in the book. Emphasis is placed on efficiency, energy savings, speed-control range, harmonics, and application for these drives.Electric Motor Drives: Modeling, Analysis, and Control.
Expertly curated help for Electric Motor Drives: Modeling, Analysis, and Control. Plus easy-to-understand solutions written by experts for thousands of other textbooks. *You will get your 1st month of Bartleby for FREE when you bundle with these textbooks where solutions are availableBrand: Prentice Hall, Inc.
The pulse width modulated voltage source inverter for induction motors. The six-step current source inverter drive. The six-step synchro-convertor system for synchronous motors. The current source inverter for the capacitor self-excited induction motor. The cycloconvertor.
The slip energy recovery system for wound rotor induction motors. Closed-loop control of a double-circuit-rotor slip energy recovery drive (SERD) system is investigated, and different types of controllers are proposed and their performance is compared.
Backcover copy. Electric Motor Drives is a comprehensive book for seniors, graduates, and practicing engineers.
Designed to motivate students and professional engineers alike, the book emphasizes a systematic approach to motor drives based on physical insight and practical implementation aspects.
· Variable Speed Drive Systems. · Separately Excited DC Motors. · Single-Phase Rectifiers with Motor Load. · Three-Phase Rectifiers with Motor Load. · Chopper Drives. · Three-Phase Induction Motors. · Speed Control by AC Power Controller. · Speed Control by Slip-Energy Recovery. · Induction Motors with Voltage-Source Inverters.
· Induction Motor with Current-Source Inverter. Nov 13, · Electric Motor Drives Modeling Analysis & Control by Ramu Krishnan available in Hardcover on sylvaindez.com, also read synopsis and reviews.
Electric Motor Drives is a comprehensive book for seniors, graduates, and practicing engineers.5/5(1).