Brushless electric motor, particularly for direct driving of a w

Details Brushless electric motor, particularly for direct driving of a w Brushless electric motor, particularly for direct driving of a w

1996-01-11

1998-10-20

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 68D, 310254, 310259, 310269, 417368, 417423, H02K 6700, H02K 1100

Patent

active

058251081

ABSTRACT:
The motor comprises a rotor (30) fixed for rotation with a shaft (36) of a member to be driven and a crown-like stator (10) obtained by blanking a lamination stack (12) provided with coil supporting teeth (11). Within the stator crown (10) there are obtained by blanking the lamination stack (12) a plurality of receptacles (13, 15, 17) for seating electric and electronic components associated with the stator. The components comprise a transformer (24), an inductance coil (25), and a plurality of MOSs (23). The stator crown (10) is co-molded with a covering of electrically insulating plastic material to cover the receptacles (13, 15, 17) and the teeth (11) and form a tank (22) for receiving a printed circuit (21). The permanent magnet rotor is fitted with stacks of small pieces (19) obtained by blanking lamination portions within the stator crown (10). The stacks of small pieces face the magnets (31) so as to close the respective magnetic circuits.

REFERENCES:
patent: 3636393 (1972-01-01), Pieper
patent: 3867654 (1975-02-01), Otto
patent: 4061121 (1977-12-01), MacLeod
patent: 4093897 (1978-06-01), Fujita et al.
patent: 4613781 (1986-09-01), Sanders
patent: 5001412 (1991-03-01), Carter et al.
patent: 5044883 (1991-09-01), Neuder
patent: 5176509 (1993-01-01), Schmider et al.
patent: 5217353 (1993-06-01), De Filippis

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