Globe Motors, Inc.

L Jay Batten

Dennis L Queary

Brian F Gaughan

A motor termination board is disclosed for facilitating interconnection of control components and power components in a Brushless DC motor. The motor termination board includes a first stamping having a plurality of conductive paths, where the first stamping includes a plurality of connection points for receiving leads from control components and a plurality of control terminals for connecting the motor termination board to an electronic control of the motor. A second stamping is positioned adjacent the first conductive stamping and also has a plurality of conductive paths, where the second stamping includes a plurality of connection points for receiving leads from windings of the motor and a plurality of power terminals for connecting the motor termination board to a power supply for the motor. A termination board housing is provided for encapsulating the conductive paths of the first and second stampings and includes a first socket around the control terminals and a second socket around the power terminals. The motor termination board further includes a plurality of switching devices connected to the first and second stampings, wherein the switching devices operate to open up the motor windings upon detection of an electrical short therein.

Motor termination board

One aspect of the invention is a rotor core for use with a permanent ring magnet in an electric motor which serves to minimize and evenly distribute thermal stresses in the rotor without undermining the efficiency of the motor by distorting the flux return to the ring magnet. According to one embodiment, the rotor core comprises a plurality of laminated plates. Each of the plates has a rim with a circular outer perimeter, a hub concentric with the outer perimeter of the rim, and first and second sets of curved spokes coupling the hub to the rim. Each spoke of the first set of curved spokes is concave in a clockwise direction and each spoke of the second set of curved spokes is concave in a counter-clockwise direction. According to another embodiment, the rotor core comprises a plurality of laminated structurally-identical perforated plates having obverse and reverse sides such that the obverse side of each plate faces the obverse side of an adjacent plate. In an especially preferred form, the plates include a plurality of arcuate perforations symmetrically distributed about a central axis of the rotor core. Adjacent arcuate perforations define arcuate spokes which support the magnet ring.

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Lebanon, OH, United States of America

L Jay Batten