Patent ID: 7489055

Claim:
A linear motor comprising: a bobbin; first and second coil groups wound on the bobbin to allow driving power to be applied to the coil groups; and a magnet adapted to be linearly reciprocated under the influence of a magnetic field that is produced by the coil groups depending on load current flowing through the coil groups, wherein each of the coil groups comprises a main coil and an auxiliary coil, and the main coils are connected with each other in parallel, wherein the first coil group has a first main coil and a first auxiliary coil, and the second coil group has a second main coil and a second auxiliary coil, wherein a base tap is connected to first ends of the first and second main coils connected in parallel, the base tap being connected to a power supply unit, where a first connecting tap is connected to second ends of the first and second main coils connected in parallel and a first end of the first and second auxiliary coils connected in series, and wherein a second connecting tap is connected to a second end of the first and second auxiliary coils connected in series.