Linear Motion Electric Machines

Linear motors directly produce the back and forth linear motion required by machine tools and many other applications.

Linear motion electric machines.

In a traditional electric motor the rotor rotating part spins inside the stator static part. Linear motion electric actuator for control valve overview. 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. Linear motors are electric induction motors that produce motion in a straight line rather than rotational motion.

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. A feasible linear induction motor is described in the u s. 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. 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 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. 3810l applicable to various movement transform and valve a manual adjustment valves with requirments with automatic locking self revised and diagnostic features also add a delay protect signal protection and fault alarm function widely applied in power metallurgy petrochemical industry light industry and environmental protection. Linear motion electrical machines abstract. As for any other l inear motion elect rica l machine t he usefu l force thrust.

Linea r electric motor s can dr ive a linear motion. 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. A rotary and linear motion device includes a magnetic stator assembly opposed electromagnetic actuators and a linear to rotary converter e g cam. Based on topological considerations a classification of these.

Patent 782 312 1905 inventor alfred zehden of frankfurt am main for driving trains or lifts. New linear motors the number of choices for converting electrical energy into linear motion recently increased.