US4218646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
AC Feeding apparatus and rotating field apparatus having AC feeding apparatus
Assignee: Mitsubishi Electric Corp
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Filing: 1977-12-21
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Granted: 1980-08-19
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Expires: 1997-12-21
Abstract
Abstract An AC feeding apparatus which comprises a plurality of series solid state switch groups connected in parallel and with each series solid state switch group comprising N solid state switches connected in series. AC windings are provided for n(n≧1) phase and m(m≧2) independent groups of the windings are respectively connected to corresponding contacts of series connections of the solid state switches of the series switch groups. In the AC feeding apparatus, N solid state switches in each group and m groups of windings have the relation of 2m≧N≧(m+1) and at least two groups among m groups of the AC windings are excited with each phase difference of Δθ(≠π) in the turn-on control of the solid state switches. The AC feeding apparatus can be adapted for use in a rotating field generator, a commutator motor or an AC motor apparatus.
Inventors
- 👤 Masahiko Akamatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:34
CPC Classifications
H; H02; H02P; H02P27/00; H02P27/04; H02P27/06; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
144 words
In an AC feeding apparatus which comprises a plurality of series solid state switch groups connected in parallel; each series solid state switch group comprising N solid state switches connected in series; AC windings for n(n≧1) phase and m(m≧2) independent groups of windings which are respectively connected to corresponding contacts of series connections of solid state switches of the series solid state switch groups; an improvement characterized in that N numbers of the solid state switches in each group, and m groups of AC windings have the relation of 2m≧N≧(m+1) and at least two groups among m groups of the AC windings are sequentially excited with each phase difference Δθ(≠π) in the turn-on control of the solid state switches by a turn-on control means, and at least one group of the AC windings is bypassed in the turn-on control of the solid state switches.
Claim 2
Dependent Claim
144 words
In an AC feeding apparatus which comprises a plurality of series solid state switch groups connected in parallel; each series solid state switch group comprising N solid state switches connected in series; AC windings for n(n≧1) phase and m(m≧2) independent groups of windings which are respectively connected to corresponding contacts of series connections of solid state switches of the series solid state switch groups; an improvement characterized in that N numbers of the solid state switches in each group, and m groups of AC windings have the relation of 2m≧N≧(m+1) and at least two groups among m groups of the AC windings are sequentially excited with each phase difference Δθ(≠π) in the turn-on control of the solid state switches by a turn-on control means, and at least one group of the AC windings is bypassed in the turn-on control of the solid state switches.
Claim 3
Dependent Claim
148 words
In a rotating field generator which comprises a plurality of series solid state switch groups connected in parallel which are connected to a DC power source; each series solid state group comprising N solid state switches connected in series; AC windings for n(n≧1) phase and m(m≧2) independent groups of windings which are respectively connected to corresponding contacts of series connections of solid state switches of the series solid state switch groups, an improvement characterized in that N numbers of the solid state switches in each group and m groups of AC windings have the relation of 2m≧N≧(m+1) and m groups of the AC windings are sequentially excited with a phase difference Δθ in the turn-on control of the solid state switches by a turn-on control means; and the conductors of the AC windings are arranged in sequential distribution in a substantially cylindrical space along the peripheral part thereof.
Claim 4
Dependent Claim
148 words
In a rotating field generator which comprises a plurality of series solid state switch groups connected in parallel which are connected to a DC power source; each series solid state group comprising N solid state switches connected in series; AC windings for n(n≧1) phase and m(m≧2) independent groups of windings which are respectively connected to corresponding contacts of series connections of solid state switches of the series solid state switch groups, an improvement characterized in that N numbers of the solid state switches in each group and m groups of AC windings have the relation of 2m≧N≧(m+1) and m groups of the AC windings are sequentially excited with a phase difference Δθ in the turn-on control of the solid state switches by a turn-on control means; and the conductors of the AC windings are arranged in sequential distribution in a substantially cylindrical space along the peripheral part thereof.
Claim 5
Dependent Claim
24 words
A rotating field generator according to claim 2 wherein the AC windings for n phases are disposed on the stator of an AC motor.
Claim 6
Dependent Claim
51 words
A rotating field generator according to claim 2 wherein the AC windings for n phases and m groups are wound on a stator of an AC motor and a rotor of the AC motor is arranged in the space of the rotating field formed by the conductors of the AC windings.
Claim 7
Dependent Claim
68 words
A rotating field generator according to claim 2 wherein the AC windings for n phases and m groups are primary windings which are wound on a stator to form the rotating field and said primary windings interacting with secondary multi-phase windings of second conductor groups that are arranged in the space of the rotating field whereby the current is fed through the secondary windings to an AC load.
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) | 1983-08-19 | 1984-02-18 | 1984-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-19 | 1988-02-18 | 1988-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-19 | 1992-02-18 | 1992-08-19 | $7700.00 | Window Closed / Lapsed |