solenoid - EXAMPLE: ELECTROMAGNETIC SOLENOID A common...

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Unformatted text preview: EXAMPLE: ELECTROMAGNETIC SOLENOID A common electromechanical actuator for linear (translational) motion is a solenoid. Current in the coil sets up a magnetic field that tends to center the movable armature. Electromagnetic Solenoid page 1 Neville Hogan On the electrical side the device behaves like an inductor but the inductance depends on the position of the movable armature. This position-modulated inductor is properly represented by a two-port energy-storage element with an electrical port and a mechanical port. On the mechanical side, a force is required to displace the armature from its center position the device looks like a spring. An inductor may be represented by a gyrator (coupling the electrical and magnetic domains) and a capacitor representing magnetic energy storage. A bond graph for this model is as follows. F G Y e = . i N C m a g n e tic d o m a in e le c t r ic a l d o m a i n F m e c h a n i c a l d o m a in x . . Electromagnetic Solenoid page 2 Neville Hogan E QUIVALENT BEHAVIOR : To find an equivalent model without the magnetic domain bring the magnetic behavior into the electrical domain. a capacitor through a gyrator behaves like an inductor the mechanical side still behaves like a spring....
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This note was uploaded on 02/27/2012 for the course MECHANICAL 2.141 taught by Professor Nevillehogan during the Fall '06 term at MIT.

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solenoid - EXAMPLE: ELECTROMAGNETIC SOLENOID A common...

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