Brushless D.C. motor

Details Brushless D.C. motor Brushless D.C. motor

1990-12-13

1992-08-11

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310156, 310180, 310185, 310216, H02K 114

Patent

active

051382130

ABSTRACT:
The invention relates to a brushless d.c. motor comprising a first motor section (1), which exhibits circumferentially alternating permanent-magnetic north and south poles adjacent the magnetic air gap (17), and comprising a second motor section (9) having electrically energizable salient soft-magnetic pole shanks (11) extending towards the magnetic air gap, the soft-magnetic pole shanks (11) extending with their iron cross-section, which traverses the exciter coils (15), up to the proximity of the magnetic air gap (17), the pole tips (19) of the pole shanks (11) being rounded to reduce the cross-section towards the air gap.

REFERENCES:
patent: 3860843 (1975-01-01), Kawasaki
patent: 4467233 (1984-08-01), Moren
patent: 4758132 (1988-07-01), Hartwig
patent: 4851758 (1989-07-01), Osada
patent: 4883999 (1989-11-01), Hendershot
patent: 5030867 (1991-07-01), Yamada

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