From Motors and Drives

AC Induction Motor
The main parts in an AC induction motor is the rotor (rotating element) and the stator (stationary element that generates the magnetic flux). The

The squirrel cage motor is the simplest to manufacture and the easiest to maintain. The operation of the squirrel cage motor is simple. The threephase current produces a rotating magnetic field in the stator. This rotating magnetic field causes a magnetic field to be set up in the rotor also. The attraction and repulsion between these two magnetic fields causes the rotor to turn. This concept can be seen in Figures 3-24 and 3-25

The squirrel cage motor is a constant-speed motor with either a normal or high starting torque. These characteristics fulfill the requirements of the majority of industrial applications.

The concept of the rotating magnetic field is shown in Figure 3-26. This figure shows the relationship of the three-phases versus pole magnetic fields. Each magnetic pole pair is wound in such a way that allows the sta-

tor magnetic field to "rotate." The stator of the motor consists of groups of coils wound on a core, which are enclosed by a frame. The simple two-pole stator shown in Figure 3-26 has...


More >>
© 2003 ISA

Products & Services
Locating and Fixturing Pins
Locating and fixturing pins are press-fit, removable hardware devices designed to align or affix two work pieces to very small tolerances. When translation mechanisms are not stable or precise enough to place objects in position for a particular process, locating and fixturing pins can ensure an accurate alignment.
Case Equipment
Case equipment is machinery used to form, pack, seal, or unpack cases of products.
Timing Screws
Timing screws are helical-screw devices used within automated equipment to advance product at a specific rate and interval of movement.
Industrial Pins
Industrial pins are varieties of fastening hardware meant to couple, align, mount, assemble, or penetrate two workpieces. The operation of the pin depends on design and employment, but industrial pins can be categorized into several categories, such as: hitch and linch pins; cotter pins and wire clips; spring pins; locating and fixturing pins; and specialty pins.
Sewage Pumps
Sewage pumps are used to pump effluents, semi-solids and small solids in liquids.

Topics of Interest

Magnetic Field (Rotor) The rotor is the rotating part of the motor. The rotor consists of copper or aluminum bars, connected together at the ends with end rings. Refer to Figure 3-27. The inside of...

Standalone digital video recording tool adopted by Brenton Eng. for its tray and case packers spots potential line jams and identifies machine problems before they happen, recording continuously, at...

Thermography has been used in pavement engineering for quality control of asphalt paving operations, during initial application for the most part. This paper however, focuses on evaluation of existing...

Capacity Considerations Individual motor vehicles as a transportation mode can only provide low-density service, even in the best of circumstances certainly as compared to most public transit...

Multi-lane serial data links are susceptible to crosstalk from adjacent lanes as well as external aggressors. The resulting interference increases the jitter and noise on the victim lanes and can...