Patent ID: 6737770
Filing Date: 2004-05-18
Classification: H01H,H02K,H05K

Abstract:
A brushless motor comprising:a stator comprising a plurality of exciting coils which receives drive current; a rotor rotatable relative to the stator; a first circuit section comprising a filter circuit for eliminating surges of electric power for the drive current, the first circuit section being produced on a wiring metal piece; a second circuit section comprising a control circuit for controlling the magnetic field generated by the stator by controlling the drive current, the second circuit section being produced on a printed wiring board; and a fuse member electrically connecting the wiring metal piece of the first circuit section and a wiring pattern formed on the printed wiring board of the second circuit section, the fuse member electrically disconnecting the wiring metal piece and the wiring pattern when a temperature of the wiring pattern becomes higher than a predetermined temperature, wherein the fuse member is made of elastic and electro-conductive material, wherein a first end portion of the fuse member is fixed on the wiring metal piece of the first circuit portion, wherein an other end portion of the fuse member is soldered with the wiring pattern by means of solder which melts at the predetermined temperature, wherein the other end portion of the fuse member is inserted into a through hole formed on the printed wiring board, and wherein the other end portion of the fuse member is soldered with the wiring pattern formed on a back of a surface of the printed wiring board which is opposite to the wiring metal piece.