All Motors are Stepping Motors

Variable Reluctance Motors

altA variable reluctance motor is a stepping motor that does not use a permanent magnet. A step is achieved by the principle that the rotor will rotate to minimize the reluctance path of a magnetic circuit.

In the first step, pole 1 is magnetized north and pole 4 is magnetized south. In step 2, poles 2 and 5 are energized and poles 1 and 4 are turned off. The rotor rotates 60 degrees. In step 3, poles 3 and 6 are energized and so on.

Induction and squirrel cage motors have but a single turn electrical conductor in the rotor. They generally use copper bars or cast aluminum. The electric current is induced into the rotor from the stator field. These are AC motors and stepping is derived from the line frequency. There are many other specialized motors. However, the end result is still the same: to obtain rotary motion, you have to create a rotating magnetic field.

This article was written by Dan Montone, Director of Business Development at Haydon Kerk Motion Solutions Inc., Waterbury, CT. For more information, please contact Mr. Montone at 203-756-7441, e-mail him at This email address is being protected from spambots. You need JavaScript enabled to view it., or visit http://info.hotims.com/28050-331.

White Papers

The Basics Of Pressure Regulators
Sponsored by Beswick
How To Guide for the Most Common Measurements
Sponsored by National Instruments
An Improved Method for Differential Conductance Measurements
Sponsored by Keithley Instruments
External Power Supply Efficiency Regulation Introduction
Sponsored by mega electronics
Eliminate Risk of Contention and Data Corruption in RS-485 Communications
Sponsored by Sealevel
Fundamentals of Vector Network Analysis Primer
Sponsored by Rohde and Schwarz

White Papers Sponsored By: