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What are Solenoids? |
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A solenoid is defined as a coil of wire commonly in the form of a long cylinder that when carrying a current resembles a bar magnet so that a moveable core is drawn into the coil when a current flows. A more simple definition is that a solenoid is a coil and a moveable iron core used to convert electrical energy into mechanical energy. Solenoids have been around for decades but now range in size from less than one-quarter of an inch to more than 15 inches in diameter with force outputs of less than an ounce to a ton. |
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Linear solenoids provide linear stroke usually less than one inch in either direction. Some linear solenoids are unidirectional and some are bidirectional. Linear solenoids are usually classified as pull (the electromagnetic path pulls a plunger into the solenoid body) or a push type where the plunger / shaft is pushed out of the case. Many have a
spring return to bring the plunger or plunger and shaft back to the home position. Linear solenoids are less complex devices and are significantly less expensive than rotary products. They also offer fewer life cycles and sometimes tend to be larger. Linear solenoids are found in many varieties,
many sizes and configurations. |
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| Section updated Mar 22, 2010 |
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