Dynamo-electric machine with commutator assembly

Details Dynamo-electric machine with commutator assembly Dynamo-electric machine with commutator assembly

1999-08-09

2001-01-30

Ramirez, Nestor (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310SDIG006, C310S204000, C310S206000

Reexamination Certificate

active

06181046

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a commutator assembly for a dynamo-electric machine for rectifying a current by placing brushes in contact with commutator segments.
2. Description of the Related Art
FIG. 32
shows a conventional commutator assembly for a direct-current motor. In the figure, reference numeral
100
denotes a rotor core,
101
denotes a commutator,
102
denotes commutator segments,
103
denotes equalizer,
104
denotes rotor windings,
105
denotes riser portions, and
106
and
107
denote securing members.
The equalizer
103
electrically connect commutator segments
102
which are to have the same electric potential, and as shown in
FIG. 33
, the straight-angled conductor-shaped equalizer portions
110
being component members of the equalizer
103
and the commutator segments
102
are connected at connecting portions
108
using a means such as brazing, etc.
In a commutator assembly for a direct-current motor of the above construction, one problem has been that the securing members
107
are required to secure the equalizer
103
in order to support the equalizer
103
against centrifugal force, and for that reason the electric motor has been enlarged, and it has been difficult to apply the assemblies to small electric motors, particularly of the type used in automobile electrical systems.
SUMMARY OF THE INVENTION
The present invention aims to solve the above problems and an object of the present invention is to provide a commutator assembly for a dynamo-electric machine having advantages such as enabling reductions in size, etc.
To this end, according to the present invention, there is provided a commutator assembly for a dynamo-electric machine comprising: a commutator having a plurality of commutator segments arranged circumferentially thereupon; brushes contacting the commutator segments; and an equalizer connecting the commutator segments which are to have the same electric potential; the equalizer being provided with printed circuit board comprising an insulating substrate and a connecting plate composed of a conducting film formed on the insulating substrate being electrically connected to the commutator segments.


REFERENCES:
patent: 3535776 (1970-10-01), Luca
patent: 4396850 (1983-08-01), Herr
patent: 4490637 (1984-12-01), Van De Griend
patent: 6057623 (2000-05-01), Tanka et al.
patent: 6057626 (2000-05-01), Tanaka et al.
patent: 48-13804 (1973-02-01), None
patent: 52-109105 (1977-09-01), None

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