Patent ID: 6043573
Filing Date: 2000-03-28
Classification: H02K

Abstract:
A method for manufacturing a linear voice coil actuator having a burn-out-proof coil, wherein the actuator is capable of continuously generating approximately as much as a one hundred kilogram force while running less than two amperes of current through the coil, the method which comprises the steps of:mounting a magnet on a base to create an unsaturated magnetic circuit to generate a magnetic field, said magnet having a substantially flat surface;positioning an electrical coil on said base for reciprocal linear motion relative to said magnet, said electrical coil having a substantially flat surface, and said coil being mounted on said base to establish a gap between said surface of said magnet and said surface of said coil with a distance of approximately 0.75 mm across said gap when no current is running through said coil; andconnecting a voltage means to said coil for selectively driving a current of less than approximately two amperes through said coil to interact with said magnetic field of said magnet to generate as much as a 100 kg force on said coil.