free barcode generator c# Polyphase AC Induction Motors in Software

Making QR Code in Software Polyphase AC Induction Motors

Polyphase AC Induction Motors
Painting QR Code ISO/IEC18004 In None
Using Barcode printer for Software Control to generate, create Quick Response Code image in Software applications.
Denso QR Bar Code Reader In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
Polyphase induction motors are the most widely used integral-horsepower AC motors because they are simple, ruggedly built, and offer good operating characteristics The
QR Code JIS X 0510 Drawer In C#
Using Barcode encoder for VS .NET Control to generate, create QR Code 2d barcode image in .NET framework applications.
Drawing QR Code In .NET
Using Barcode creation for ASP.NET Control to generate, create QR Code ISO/IEC18004 image in ASP.NET applications.
Drawing QR Code In .NET Framework
Using Barcode creation for Visual Studio .NET Control to generate, create QR Code JIS X 0510 image in .NET framework applications.
Quick Response Code Generator In Visual Basic .NET
Using Barcode generator for VS .NET Control to generate, create Quick Response Code image in VS .NET applications.
Drawing ANSI/AIM Code 128 In None
Using Barcode creator for Software Control to generate, create Code-128 image in Software applications.
Encode Bar Code In None
Using Barcode encoder for Software Control to generate, create bar code image in Software applications.
EAN-13 Supplement 5 Creator In None
Using Barcode creator for Software Control to generate, create European Article Number 13 image in Software applications.
Generating Bar Code In None
Using Barcode maker for Software Control to generate, create bar code image in Software applications.
1 8 1 4 1 3 1 2 3 4
UPC-A Supplement 2 Encoder In None
Using Barcode drawer for Software Control to generate, create UPC-A image in Software applications.
USS-128 Generator In None
Using Barcode creation for Software Control to generate, create UCC-128 image in Software applications.
USS 93 Generation In None
Using Barcode creator for Software Control to generate, create USS Code 93 image in Software applications.
Encoding GTIN - 128 In Objective-C
Using Barcode drawer for iPhone Control to generate, create EAN 128 image in iPhone applications.
Code 128 Code Set C Encoder In Objective-C
Using Barcode generation for iPad Control to generate, create Code 128C image in iPad applications.
Printing GTIN - 128 In None
Using Barcode creator for Office Word Control to generate, create GS1-128 image in Office Word applications.
Bar Code Recognizer In Java
Using Barcode Control SDK for Java Control to generate, create, read, scan barcode image in Java applications.
USS-128 Maker In Visual Basic .NET
Using Barcode creator for .NET framework Control to generate, create GS1 128 image in Visual Studio .NET applications.
1D Generation In VS .NET
Using Barcode generator for .NET framework Control to generate, create Linear 1D Barcode image in VS .NET applications.
UCC - 12 Generation In Java
Using Barcode encoder for Android Control to generate, create UPC A image in Android applications.
275 400 450 600 850 1000 1600 2000 3000
400 500 600 750 1000 1250 1750 2350 X
600 850 975 1300 1900 2300 3200 3900 5200
850 1050 1350 1800 2600 3000 4200 5100 6800
1200 1700 1950 2600 X X X X X
1 11 2 2 3
X: Motors with higher horsepower ratings are not in general use
stators of these motors are connected to the AC line, but their rotors are not because they are considered to be secondary windings with current induced in them by the transformer primary winding action of the stator Because of this, the stator is sometimes called the primary and the rotor is sometimes called the secondary Three-phase induction motors offer high starting torque, high power factor, and high efficiency These characteristics enable them to drive most equipment with loads that must be brought up to operating speed from standstill smoothly and quickly Figure 10-10 is a typical speed torque curve for polyphase motors Three-phase induction motors can have either squirrel-cage or wound rotors Both motors operate on the same principles and have the same stator construction Polyphase motors with squirrel-cage rotors are basically constant-speed machines, but their operating characteristics can be varied by modifying the design of their rotor slots to change torque, current, and full-load speed Stator cores of polyphase AC motors are made by stacking slotted sheet-steel laminations and clamping them in a stator frame of cast iron or fabricated steel plate The copper stator windings are spaced 120 electrical degrees apart in the slots, and their electrical connections can be either be wye or delta Squirrel-cage rotors of modern three-phase induction motors are built by stacking round slotted steel laminations to form a cylindrical core Aluminum is cast in the slots to form secondary conductor bars and short-circuiting rings at the ends of the bars Rotor bars and end rings have also been cast from copper The bars are slightly skewed from parallel with respect to the shaft to provide more uniform torque and reduce the humming noise of the magnetic field when the motor is running
Figure 10-10 Speed torque curve for a typical polyphase AC motor
Conductor bars and end rings are not insulated from the core because the rotor currents naturally follow the paths of least resistance, the conductors The barred rotor suggests a cylindrical squirrel cage The rotors of wound-rotor or slip-ring motors are wound from insulated conductors in much the same way as the insulated windings of stators Rotor phase windings are wye-connected, with the open end of each phase brought out to a slip ring mounted on the rotor shaft and brushes However, these slip rings and brushes are not connected to a power source because their function is to provide a connection for an external variable-control resistor into the rotor circuit Wound-rotor motors are less widely used than squirrel-cage motors because of their higher cost and the maintenance of the wound rotors required When a three-phase induction motor is energized with three-phase AC power, the windings produce an alternating rotating magnetic field that revolves in synchronism with the line frequency Rotation direction is determined by the time sequence of the currents in the windings As the rotating field sweeps past the bars in the rotor at synchronus speed, it induces currents which flow in the conductors to set up a magnetic field with a corresponding polarity This results in a repulsion attraction response between the rotating magnetic field of the stator and the induced field in the rotor The rotor rotates as it attempts to keep up with the rotating magnetic field, and the rate at which the lines of flux cut the rotor determines the induced voltage Threephase motor rotation can be reversed by interchanging any two of the three motor supply lines The magnetic field rotates at the synchronous speed of the motor determined by the number of poles in the stator and the frequency of the power supply The synchronous speed Ns a motor is given by Ns where f line frequency in hertz and P 120f P the number of poles of the winding
Copyright © . All rights reserved.