US3584248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ac powered dc motor including semiconductor rectifiers
Assignee: Denso Corp
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Filing: 1969-09-09
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Granted: 1971-06-08
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Expires: 1989-09-09
Abstract
Abstract In a DC motor which includes semiconductor rectifiers within it for converting AC power into DC power for driving the motor, an improved arrangement for supporting the rectifiers and brush holders.
Inventors
- 👤 Toshimitsu Higashino
- 👤 Sinichi Inagaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:14
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/14; H02K5/143; H02K5/148; H02K11/00; H02K11/04; H02K11/049; H02K11/05
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
162 words
An improvement for an AC powered DC motor including a yoke having pole pieces and field windings, an armature disposed within said yoke and having a commutator, end covers positioned on both sides of said yoke and supporting said armature through bearings, brush holders for holding brushes for sliding on said commutator, and semiconductor rectifiers for rectifying an AC input and feeding a DC output current to said brushes and field windings, said improvement comprising: a disc-shaped member for mounting both said brush holders and said rectifiers, said disc-shaped member including at least two heat radiator plates connected together by at least two insulating plates, portions of said insulating plates extending beyond said radiator plates for mounting said disc-shaped member to said motor, said rectifiers secured to said heat radiator plates such that the heat radiator plates are electrically connected to the DC output side of a rectifying circuit of said rectifiers, and said brush holders secured to said heat radiator plates.
Claim 2
Dependent Claim
162 words
An improvement for an AC powered DC motor including a yoke having pole pieces and field windings, an armature disposed within said yoke and having a commutator, end covers positioned on both sides of said yoke and supporting said armature through bearings, brush holders for holding brushes for sliding on said commutator, and semiconductor rectifiers for rectifying an AC input and feeding a DC output current to said brushes and field windings, said improvement comprising: a disc-shaped member for mounting both said brush holders and said rectifiers, said disc-shaped member including at least two heat radiator plates connected together by at least two insulating plates, portions of said insulating plates extending beyond said radiator plates for mounting said disc-shaped member to said motor, said rectifiers secured to said heat radiator plates such that the heat radiator plates are electrically connected to the DC output side of a rectifying circuit of said rectifiers, and said brush holders secured to said heat radiator plates.
Claim 3
Dependent Claim
45 words
An improvement as in claim 1 wherein: at least two rectifiers are secured to each of at least two of said heat radiator plates thereby forming part of a full wave bridge rectifying circuit with the DC output terminals thereof comprising said heat radiator plates.
Claim 4
Dependent Claim
21 words
An improvement as in claim 2 wherein said brush holders are both electrically and mechanically secured to said heat radiator plates.
Claim 5
Dependent Claim
18 words
An improvement as in claim 3 wherein said brush holders are integrally formed with said heat radiator plates.
Claim 6
Dependent Claim
26 words
An improvement as in claim 1 wherein said brush holders and said insulating plates are secured to said heat radiator plates by common conductive connecting members.
Claim 7
Dependent Claim
34 words
An improvement as in claim 1 wherein said brush holders are provided with connecting terminals and said field windings and said brushes are electrically connected by lead wire screw connected onto said connecting terminals.
Claim 8
Dependent Claim
38 words
An improvement as in claim 1 wherein said disc-shaped member is mounted to said motor by an outwardly extending portion of said insulating plates being interposed between said yoke and one of said end covers of said motor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |