Linear Motion Electric Machines

Linear motors are electric induction motors that produce motion in a straight line rather than rotational motion.

Linear motion electric machines.

A rotary and linear motion device includes a magnetic stator assembly opposed electromagnetic actuators and a linear to rotary converter e g cam. Where a conventional rotary motor is used to drive a load in a linear motion some kind of mechanism is required to transform the rotary motion of the motor shaft to the desired straight line motion. In a linear motor the stator is unwrapped and laid out flat and the rotor moves past it in a straight line. The history of linear electric motors can be traced back at least as far as the 1840s to the work of charles wheatstone at king s college london but wheatstone s model was too inefficient to be practical.

Patent 782 312 1905 inventor alfred zehden of frankfurt am main for driving trains or lifts. Based on topological considerations a classification of these. The almost consolidated trend is to switch from hydraulic or pneumatic cylinders to electric linear actuators with particular reference to some industrial fields as packaging and automatic machines. Each electromagnetic actuator includes a coil that is configured to reciprocate relative to the magnetic stator assembly or to linearly translate in a common direction relative to the magnetic stator assembly.

The main purpose is to have a better control and a greater versatility in automations as well as a deep customization of the machine or the. Linear motion electric actuator for control valve overview. A feasible linear induction motor is described in the u s. New linear motors the number of choices for converting electrical energy into linear motion recently increased.

Linea r electric motor s can dr ive a linear motion. Linear motors directly produce the back and forth linear motion required by machine tools and many other applications. In a traditional electric motor the rotor rotating part spins inside the stator static part. Welcome the linear motor.

A survey of linear motion electrical machines is presented. Although various types of dc and ac linear machines are briefly mentioned linear induction motors are the main concern of the paper and they are discussed in considerable detail.