Xem 1-20 trên 29 kết quả Synchronous motors
  • Chapter 1: Industrial motors content presentation D.C. Motors, A.C. Induction motor, A.C. Synchronous motors, brushless servomotors, reluctance motors, A.C. Commutator motors, mechanical and environmental, effectsof semiconductor power converters.

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  • Power Electronics and Motor Drives including content: introduction and Perspective, power Semiconductor Devices, phase-Controlled Converters and Cycloconverters, voltage-Fed Converters and PWM Techniques, current-Fed Converters, electrical Machines for Variable-Speed Drives, induction Motor Drives, synchronous Motor Drives, computer Simulation and Digital Control.

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  • 1. STEPPER MOTOR SYSTEMS OVERVIEW Motion Control, in electronic terms, means to accurately control the movement of an object based on either speed, distance, load, inertia or a combination of all these factors. There are numerous types of motion control systems, including; Stepper Motor, Linear Step Motor, DC Brush, Brushless, Servo, Brushless Servo and more. This document will concentrate on Step Motor technology. In Theory, a Stepper motor is a marvel in simplicity. It has no brushes, or contacts.

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  • Introduction to AC machine, synchronous generators, synchronous motors, three phase Induction machines, three phase induction motors, induction generators, induction regulators As the main contents of the document "Electrical machines 2". Invite you to consult the text book for more documents serving the academic needs and research.

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  • This chapter include all of the following content: Single-phase induction motors: qualitative examination, starting & running performance of singlephase induction & synchronous motors, revolving-field theory of single-phase induction motors, two-phase induction motors.

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  • Electric motors convert electrical energy into mechanical energy by utilizing the properties of electromagnetic energy conversion. The different types of motors operate in different ways and have different methods of calculating the performance, but all utilize some arrangement of magnetic fields. Understanding the concepts of electromagnetics and the systems of units that are employed is essential to understanding electric motor operation.The first part of this chapter covers the concepts and units and shows how forces are developed.

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  • Concept: Generators convert mechanical energy to electric energy. Motors convert electric energy to mechanical energy. The construction of motors and generators are similar. Every generator can operate as a motor and vice versa. The energy or power balance is : Generator: Mechanical power = electric power + losses Motor: Electric Power = Mechanical Power + losses.

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  • This paper introduces a new analytical method for performing the output torque calculations of an interior permanent magnet synchronous motor (IPMSM) including both permanent magnet and reluctance torque components.

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  • This chapter include all of the following content: Introduction to polyphase synchronous machines, synchronous – machine inductances and equivalent circuits, performance characteristics, effects of salient poles, power – angle characteristics of salient – pole machines, permanent – magnet ac motors.

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  • This Instructor’s Manual is intended to accompany the fourth edition of Electric Machinery Fundamentals. To make this manual easier to use, it has been made self-contained. Both the original problem statement and the problem solution are given for each problem in the book. This structure should make it easier to copy pages from the manual for posting after problems have been assigned.

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  • Brushless DC (BLDC) motors are synchronous motors with permanent magnets on the rotor and armature windings on the stator. Hence, from a construction point of view, they are the inside-out version of DC motors, which have permanent magnets or field windings on the stator and armature windings on the rotor. A typical BLDC motor with 12 stator slots and four poles on the rotor is shown in Fig. 10.1. The most obvious advantage of the

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  • An updated approach to reference frame analysis of electric machines and drive systems Since the first edition of Analysis of Electric Machinery was published, the reference frame theory that was detailed in the book has become the universally accepted approach for the analysis of both electric machines and electric drive systems. Now in its second edition, Analysis of Electric Machinery and Drive Systems presents, in one resource, the application of this theory to the analysis, simulation, and design of the complete drive system including the machine, converter, and control....

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  • D.C. motors General Fundamental equations and performance Wound-field motors Permanent-magnet motors Operating principles Commutation Rotation Compensation D.C. PM commutation Construction of the D.C. motor D.C. motor frame D.C. motor armature Brush gear Mountings D.C. PM design Rotor inertia Permanent-magnet materials 2 A.C. induction motors General Fundamental equations and performance Electrical characteristics of induction motors Torque characteristics Voltage-frequency relationship Increased voltage Reduced frequency Slip-ring induction motor Speed-changing motors A.C.

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  • MÁY PHÁT ÐỒNG BỘ BA PHA PHẦN I: MỤC ÐÍCH THÍ NGHIỆM After completing this unit, you will be able to demonstrate and explain the operating characteristics of three phase synchronous geneartors (alternators) using the synchronous Motor/Generator and Prime Mover/Dynamometer modules. PHẦN II: TÓM TẮT LÝ THUYẾT Máy phát ðiện ðồng bộ ba pha sản xuất ra phần lớn ðiện nãng ðýợc sử dụng ngày nay. Nó hiện diện ở tất cả các nhà máy ðiện từ thủy ðiện, nhiệt ðiện, ðiện hạt nhân…v.v.

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  • Tham khảo sách 'instructor’s manual to accompany', kỹ thuật - công nghệ, điện - điện tử phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • ÐỘNG CÕ ÐIỆN ÐỒNG BỘ PHẦN I: MỤC ÐÍCH When you have completed this exercise, you will be to demonstrate how to start a synchronous motor as well as some characteristics of a synchronous motor using the synchronous Motor/ Generator module. PHẦN II: TÓM TẮT LÝ THUYẾT Ðặc ð iểm thú vị nhất của ð ộng cõ ð ồng bộ ba pha là khả nãng vận hành với tốc ð rotor bằng tốc ð của từ trýờng quay, vận hành tại hệ số công suất bằng 1, ộ ộ và có khả nãng cung cấp công suất phản kháng cho nguồn ð AC...

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  • The Altivar 71 range of variable speed drives is able to respond to the most exacting requirements thanks to its different types of motor control and numerous onboard functions.

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  • These power ratings and currents are given for an ambient temperature of 50°C (122°F) at the factory-set switching frequency, used in continuous operation (factory-set switching frequency of 4 kHz for ATV71H 037M3 to D15M3X and 2.5 kHz for ATV71H D18M3X to D45M3X). Above this factory setting, the drive will reduce the switching frequency automatically in the event of excessive temperature rise. For continuous operation above the factory setting, derating must be applied to the nominal drive current in accordance with the curves on page 14.

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  • Electric Drives Ion Boldea and Syed Nasar Linear Synchronous Motors: Transportation and Automation Systems Jacek Gieras and Jerry Piech Electromechanical Systems, Electric Machines, and Applied Mechatronics Sergey E. Lyshevski Electrical Energy Systems Mohamed E. El-Hawary Distribution System Modeling and Analysis William H. Kersting The Induction Machine Handbook Ion Boldea and Syed Nasar Power Quality C. Sankaran Power System Operations and Electricity Markets Fred I. Denny and David E.

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  • Synchronous machines come in a variety of different constructions and designs. The differences occur in the physical outlay of the rotor and in the way in which excitation flux is provided (if it is provided at all) in the machine. Regardless of the type however, all the synchronous machines have the same construction of the stator. Stator is of cylindrical crosssection, manufactured from laminated sheets of steel, and it carries a three-phase winding that is supplied with (in the motor case) or that produces (in the generator case) a system of threephase voltages....

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