Patent US4649305A successfully refreshed from Google Patents.
US4649305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capacitor between motor windings
Assignee: Morrill Motors Inc
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Filing: 1986-02-06
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Granted: 1987-03-10
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Expires: 2006-02-06
Abstract
Abstract An electrical motor has one or more capacitors inside the motor. Particularly, a half-pitch capacitor induction motor is shown, wherein the stator winding has a plurality of coils, one each on a tooth of the stator, and an auxiliary or capacitor winding includes a plurality of coils, one each on different ones of the teeth of the stator. The stator coils are spaced around the periphery of the stator such that spaces are provided between the coils, and one or more capacitors are provided in such spaces. These capacitors are mounted on an insulator board which provides physical mounting of the capacitors and also provides electrical connection to the capacitors to connect them all in parallel. The capacitors are then connected to the auxiliary winding. By this means, a small-sized motor without an elongated end bell permits mounting the capacitors inside the motor frame instead of outside in the usual cylindrical metal container.
Inventors
- 👤 Wayne J. Morrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:03
CPC Classifications
H; H02; H02K; H02K17/00; H02K17/02; H02K17/30; H02K17/04; H02K17/08
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
111 words
A capacitor motor comprising, in combination: a magnetically permeable stator; said stator having a plurality of salient teeth establishing a plurality of pole faces on the stator; a rotor journaled relative to said stator and magnetically cooperating with said pole faces across an air gap; a stator winding having a plurality of coils on said salient teeth; said coils and teeth having a width in the peripheral direction less than the width of the respective pole face to define a plurality of spaces between at least some of the adjacent coils; at least one elongated capacitor disposed in one of said spaces; and means connecting said capacitor to said stator winding.
Claim 2
Dependent Claim
111 words
A capacitor motor comprising, in combination: a magnetically permeable stator; said stator having a plurality of salient teeth establishing a plurality of pole faces on the stator; a rotor journaled relative to said stator and magnetically cooperating with said pole faces across an air gap; a stator winding having a plurality of coils on said salient teeth; said coils and teeth having a width in the peripheral direction less than the width of the respective pole face to define a plurality of spaces between at least some of the adjacent coils; at least one elongated capacitor disposed in one of said spaces; and means connecting said capacitor to said stator winding.
Claim 3
Dependent Claim
27 words
A capacitor motor as set forth in claim 1, including a frame, said stator being mounted in said frame, and means journaling said rotor in said frame.
Claim 4
Dependent Claim
21 words
A capacitor motor as set forth in claim 1, wherein said salient teeth are substantially radially inwardly directed from said stator.
Claim 5
Dependent Claim
17 words
A capacitor motor as set forth in claim 3, wherein said rotor is disposed inside said stator.
Claim 6
Dependent Claim
46 words
A capacitor motor as set forth in claim 3, including an insulator at least partially circular and having a radius substantially equal to the radial dimension from the axis of the rotor to said spaces, and means mounting said at least one capacitor on said insulator.
Claim 7
Dependent Claim
32 words
A capacitor motor as set forth in claim 5, including conductors on said insulator, and said mounting means including means connecting the leads of said at least one capacitor to said conductors.
Claim 8
Dependent Claim
17 words
A capacitor motor as set forth in claim 6, wherein said conductors are printed on said insulator.
Claim 9
Dependent Claim
30 words
A capacitor motor as set forth in claim 5, including a plurality of capacitors mounted on said insulator spaced in accordance with the position of said spaces between adjacent poles.
Claim 10
Dependent Claim
14 words
A capacitor motor as set forth in claim 5, wherein said insulator is rigid.
Claim 11
Dependent Claim
24 words
A capacitor motor as set forth in claim 1, wherein each of said teeth has thereon at least one coil of said stator winding.
Claim 12
Dependent Claim
23 words
A capacitor motor as set forth in claim 1, wherein said coils and teeth are symmetrically spaced around the periphery of said stator.
Claim 13
Dependent Claim
22 words
A capacitor motor as set forth in claim 1, wherein said pole faces are symmetrically spaced around the periphery of said stator.
Claim 14
Dependent Claim
30 words
A capacitor motor as set forth in claim 1, including an insulator disposed at one end of said stator, and means mounting said at least one capacitor on said insulator.
Claim 15
Dependent Claim
25 words
A capacitor motor as set forth in claim 13, including conductors on said insulator, and means connecting the leads of said capacitor to said conductors.
Claim 16
Dependent Claim
21 words
A capacitor motor as set forth in claim 1, wherein said plurality of teeth are two times the number of poles.
Claim 17
Dependent Claim
20 words
A capacitor motor as set forth in claim 1, wherein said plurality of coils c establish c/2 number of poles.
Claim 18
Dependent Claim
71 words
A capacitor motor as set forth in claim 16, wherein said stator winding has a plurality of coils in a main winding and a plurality of coils in a capacitor winding, a pole face being on each of said teeth, and the pitch of the pole face for a pole of said capacitor winding being substantially equal o the pitch of the pole face for a pole of said main winding.
Claim 19
Dependent Claim
38 words
A capacitor as set forth in claim 17, including a plurality of capacitors, one each in a plurality of said spaces, and means connecting said plurality of capacitors in parallel and then in series with said capacitor winding.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-09 | 1990-09-08 | 1991-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-09 | 1994-09-08 | 1995-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-09 | 1998-09-08 | 1999-03-10 | $7700.00 | Window Closed / Lapsed |