Brushless direct current motor with inverted magnet clip

摘要

A brushless direct current motor with the rotating magnet cup permanently attached to the spindle hub. After attachment, the combination spindle hub and magnet cup are affixed to the shaft and the resulting subassembly is dynamically balanced. The motor using this balanced subassembly can be assembled with no balancing required after assembly. The motor can also be disassembled for repair and reassembled without disturbing the dynamic balance. The motor includes an air seal at one end thereof and is especially useful for disk drive applications.