A linear induction motor is made up of an inductor that is made up of individual cores with a concentrated polyphase. Linear motors can be directly replaced by ball screws, hydraulic drives, pneumatic drives or cam drives.

A linear induction motor is basically what experts refer to as a “rotating squirrel cage” induction motor. The difference is that the motor opens flat. Instead of producing a rotary torque from a cylindrical machine, it produces a linear force from a flat machine. The shape and the way it produces movement changes, however it remains the same as its cylindrical counterpart. However, there are no moving parts and most experts don’t like that. It has quiet operation and low maintenance, as well as a compact size, which attracts many engineers. There is also universal agreement that it is easy to control and install. These are all important considerations when thinking about what type of device you want to create. Linear induction motor thrust ratio varies depending primarily on size and rating. Linear induction motor speeds vary from zero to many meters per second. The speed can be controlled. Stopping, starting and reversing are easy. Linear induction motors are constantly improving, and with better control, lower life cycle cost, reduced maintenance and increased performance, they are becoming the experts’ choice. Linear motors are simple to control and easy to use. They have a quick response and high acceleration. Your speed doesn’t depend on contact friction, so it’s easier to pick up speed quickly.

Stepper motors are a special type of motor that moves in discrete steps. When one set of windings is energized the motor moves one step in one direction and when another set of windings is energized the motor moves one step in the other direction. The advantage of stepper motors is that the position of the motor is “known”. The zero position can be determined, if the original position is known.

Stepper motors come in a wide range of angular resolution, with the coarsest motors typically turning 90 degrees per step. High resolution permanent magnet motors can only drive about 18 degrees less than that. With the proper driver, stepper motors can be run in half steps, which is amazing.

The main complaint about the stepper motor is that it generally consumes more power than a standard DC motor and is also difficult to maneuver.

rotary tables