A Variable-speed Control for Single-phase AC Motors PDF Download

Author: Steven Rogers Turner
Publisher:
ISBN:
Category :
Languages : en
Pages : 44

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Author: Scott Davis
Publisher:
ISBN:
Category : Engineering
Languages : en
Pages :

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"The single-phase induction motor (SIM) is one of the most common types of rotating machinery available due to the single-phase AC nature of commercial and residential power supplies. A major problem associated with this type of machine is that, unlike three-phase induction machines, no starting torque is provided by the magnetic flux rotating inside the machine. Many methods have been devised to overcome this problem, most of which revolve around changing the phase difference between the main and auxiliary phase windings. The windings in a SIM are the components that enable the motor to rotate, in that the current flowing through them creates a force, and this force turns the rotor. The phase difference between the main winding and the auxiliary winding creates a rotating stator flux, which in turn induces a torque in the rotor. Present methods have the problems of either inefficient running characteristics, starting characteristics, or expensive switching gear. The switching gear is used to disconnect the auxiliary phase once the motor is running. Certain motors have better characteristics than others, but the cost involved in obtaining a machine with good characteristics in all of the problem areas is relatively large. " -- Abstract/Synopsis.

Author: Minkailu Bah
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Minkailu Bah
Publisher:
ISBN:
Category : Electric motors
Languages : en
Pages :

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Author: Fouad Giri
Publisher: John Wiley & Sons
ISBN: 1118574249
Category : Science
Languages : en
Pages : 604

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The complexity of AC motor control lies in the multivariable and nonlinear nature of AC machine dynamics. Recent advancements in control theory now make it possible to deal with long-standing problems in AC motors control. This text expertly draws on these developments to apply a wide range of model-based control designmethods to a variety of AC motors. Contributions from over thirty top researchers explain how modern control design methods can be used to achieve tight speed regulation, optimal energetic efficiency, and operation reliability and safety, by considering online state variable estimation in the absence of mechanical sensors, power factor correction, machine flux optimization, fault detection and isolation, and fault tolerant control. Describing the complete control approach, both controller and observer designs are demonstrated using advanced nonlinear methods, stability and performance are analysed using powerful techniques, including implementation considerations using digital computing means. Other key features: • Covers the main types of AC motors including triphase, multiphase, and doubly fed induction motors, wound rotor, permanent magnet, and interior PM synchronous motors • Illustrates the usefulness of the advanced control methods via industrial applications including electric vehicles, high speed trains, steel mills, and more • Includes special focus on sensorless nonlinear observers, adaptive and robust nonlinear controllers, output-feedback controllers, fault detection and isolation algorithms, and fault tolerant controllers This comprehensive volume provides researchers and designers and R&D engineers with a single-source reference on AC motor system drives in the automotive and transportation industry. It will also appeal to advanced students in automatic control, electrical, power systems, mechanical engineering and robotics, as well as mechatronic, process, and applied control system engineers.

Author: Malcolm Barnes
Publisher: Elsevier
ISBN: 0080473911
Category : Technology & Engineering
Languages : en
Pages : 300

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Book Description
Typical practical applications of VSDs in process control and materials handling, such as those for pumping, ventilation, conveyers, compressors and hoists are covered in detail. · Provides a fundamental understanding of the installation, operation and troubleshooting of Variable Speed Drives (VSDs)· Includes practical coverage of key topics such as troubleshooting, control wiring, operating modes, braking types, automatic restart, harmonics, electrostatic discharge and EMC/EMI issues· Essential reading for electrical engineers and those using VSDs for applications such as pumping, ventilation, conveyors and hoists in process control, materials handling and other industrial contexts

Author: J. M. D. Murphy
Publisher: Pergamon
ISBN: 9780080169439
Category : Technology & Engineering
Languages : en
Pages : 214

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Author: Charles Trout
Publisher: Jones & Bartlett Learning
ISBN: 0763751138
Category : Reference
Languages : en
Pages : 127

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Book Description
Charles Trout, longtime chairman of NEC Panel 12 and author of Electrical Installation and Inspection and the National Electrical Installation Standard on Electric Motors and Controls (NECA) has written a one-of-a-kind summary of electric motor and control concepts. This highly illustrated text will prove essential for in-service electricians as well as assisting instructors with a textual overview for short courses on the topic.

Author: Sylveste Campbell
Publisher: CRC Press
ISBN: 1000148807
Category : Technology & Engineering
Languages : en
Pages : 256

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Book Description
This book discusses the current status of the solid-state AC motor controls. It treats most technical phenomena in the empirical sense, with emphasis on input-output characteristics of solid-state controls, oriented at all times to their effect on the performance of the AC motor.

Author: Siti Fairuz Hamid
Publisher:
ISBN:
Category : Electric currents, Alternating
Languages : en
Pages : 62

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Book Description
An inverter circuit by using Sinusoidal Pulse Width Modulation (SPWM) switching schemes is developed to control the speed of single-phase AC motor and being verified experimentally. Inverters are circuit that convert a DC source to an AC source. DC is one type of energy found in batteries and AC is a type of energy that is produced by the power company and found in electrical homes/offices appliances. The application of this AC motor controller is to provide single-phase ac induction motor less than 1/2 hp (372.85 W). Semiconductor device, Metal Oxide Field Effect Transistor (MOSFET) is used as switch in the full bridge (H-bridge) inverter configuration with unipolar voltage switching. A variable frequency output waveform is produced by the inverter to run a motor at variable speeds that are directly proportional to this frequency. Besides the MOSFETs as the inverter, driver for the MOSFET also very important in this circuit development because it is use to interface between control circuits (low voltage part) and inverter (high voltage part). Another important part in this inverter design is PICmicro microcontroller chip that is used to provide the switching schemes to the MOSFETs. This microchip acts as a controller circuit that produces the carrier signal and modulating signal for the inverter. The objective of this project is to build an ac motor speeds controller for holiday usage appliances, to simulate and analyze the single-phase SPWM operation of the inverter switching characteristics. The Programmable Interface Computer PIC used is PIC 18F4550 and the MOSFET driver used is IR2110. At the end of this project, the SPWM output is developed from the controller circuit and applied to the driver circuit and the inverter, and hence can be used to control the speed of the AC motor.