Double ended field coil actuator

Details Double ended field coil actuator Double ended field coil actuator

H - Electricity

02

K

H02K 41/02 (2006.01) H04R 9/02 (2006.01)

Patent

CA 2155656

A field coil actuator (50) includes a mag- netic flux conductive material case (52), an elec- trical current conductive field coil (54) and two electrical current conductive moving coils (56a, 56b) uniquely arranged. The case has a first surface (58) and a continuous channel (60) dis- posed in said first surface. The channel has a pair of opposing walls (62, 64). The field coil is disposed within the channel between the walls so that a gap (55a) remains between the walls above the field coil and another gap (55b) re- mains between the walls below the field coil. When a current is induced in the field coil, mag- netic flux is developed across the gaps. The flux is confined substantially normal to the walls of the channel. The electrical current conductive moving coils are each disposed moveably in one of the gaps such that an electrical current in the coil develops a Lorentz force on each of the coils in a direction substantially normal to the current in the moving coil and the magnetic flux to displace the moving coil in response to the current in the moving coil.

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