Patent US4161680A successfully refreshed from Google Patents.
US4161680A
Expired / Lapsed
US
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AC rotary machine apparatus
Assignee: Mitsubishi Electric Corp
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Filing: 1977-11-01
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Granted: 1979-07-17
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Expires: 1997-11-01
Abstract
Abstract An AC rotary machine apparatus comprises an AC rotary machine having AC windings forming five or seven phases and an AC feeder having solid state switches feeding AC power to the AC windings in five or seven phases.
Inventors
- 👤 Masahiko Akamatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:24
CPC Classifications
H; H02; H02K; H02K29/00; H02K29/06
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
40 words
In an AC rotary machine apparatus comprising an AC rotary machine having AC windings and an AC feeder having solid state switches which feeds AC power to the AC windings, an improvement which comprises the AC windings forming seven phases.
Claim 2
Dependent Claim
40 words
In an AC rotary machine apparatus comprising an AC rotary machine having AC windings and an AC feeder having solid state switches which feeds AC power to the AC windings, an improvement which comprises the AC windings forming seven phases.
Claim 3
Dependent Claim
27 words
An AC rotary machine apparatus according to claim 1 which comprises the AC windings forming seven phases and having coil pitches more than the electric angle π/5.
Claim 4
Dependent Claim
61 words
An AC rotary apparatus according to claim 2, wherein the AC rotary machine is a synchronous machine and position detecting means for detecting electromagnetic relative position between the armature and the field of the synchronous machine is connected whereby the solid switches of the AC feeder are controlled to turn on and off depending upon the outputs of the detecting means.
Claim 5
Dependent Claim
27 words
An AC rotary apparatus according to claim 2 wherein the AC rotary machine is an induction machine and the AC windings are disposed on a stator thereof.
Claim 6
Dependent Claim
36 words
An AC rotary machine apparatus to claim 1 wherein the AC feeder has m groups of single phase feeding units, and each of the single phase feeding units feeds to each phase of the AC windings.
Claim 7
Dependent Claim
60 words
An AC rotary machine apparatus according to claim 5 wherein each of the single phase feeding units consists of a single phase inverter in bridge connection, and the AC output terminals of each of the inverters are connected to each phase of the AC windings, and the DC output terminals of each of the inverters are mutually connected in series.
Claim 8
Dependent Claim
22 words
An AC rotary machine apparatus according to claim 5 wherein the AC rotary machine is an induction motor or a synchronous motor.
Claim 9
Dependent Claim
37 words
A synchronous machine apparatus comprising a synchronous machine having AC windings and an AC feeder having solid state switches which feeds AC power to the AC windings, an improvement which comprises the AC windings forming seven phases.
Claim 10
Dependent Claim
37 words
A synchronous machine apparatus comprising a synchronous machine having AC windings and an AC feeder having solid state switches which feeds AC power to the AC windings, an improvement which comprises the AC windings forming seven phases.
Claim 11
Dependent Claim
53 words
A synchronous machine apparatus according to claim 8 which further comprises position detecting means for detecting electromagnetic relative position between the armature and the field of the synchronous machine whereby the solid state switches of the AC feeder are controlled to turn on and off depending upon the outputs of the detecting means.
Claim 12
Dependent Claim
17 words
A synchronous machine apparatus according to claim 8 wherein the AC windings are disposed on a stator.
Claim 13
Dependent Claim
22 words
A synchronous machine apparatus according to claim 8 wherein the synchronous machine has a plurality of exciting means having different magnetic axes.
Claim 14
Dependent Claim
21 words
A synchronous machine apparatus according to claim 8 wherein the phases of the AC windings are connected in a loop connection.
Claim 15
Dependent Claim
42 words
In a cage type induction machine apparatus comprising a cage type induction machine having AC windings and an AC feeder having solid state switches which feeds AC power to the AC windings, an improvement which comprises the AC windings forming seven phases.
Claim 16
Dependent Claim
42 words
In a cage type induction machine apparatus comprising a cage type induction machine having AC windings and an AC feeder having solid state switches which feeds AC power to the AC windings, an improvement which comprises the AC windings forming seven phases.
Claim 17
Dependent Claim
23 words
A cage type induction machine apparatus according to claim 13 wherein the phases of the AC windings are connected in a loop connection.
Claim 18
Dependent Claim
36 words
A cage type induction machine apparatus according to claim 13 wherein a space distributing phase belt of a coil for one phase of the AC windings per one pole is 2π/m wherein m designates phase numbers.
Claim 19
Dependent Claim
53 words
In a wound type induction machine apparatus comprising a wound-rotor type induction machine having primary windings and secondary windings and an AC feeder having solid state switches which feed AC power to the primary windings or the secondary windings of the induction machine, an improvement which comprises the AC windings forming seven phases.
Claim 20
Dependent Claim
53 words
In a wound type induction machine apparatus comprising a wound-rotor type induction machine having primary windings and secondary windings and an AC feeder having solid state switches which feed AC power to the primary windings or the secondary windings of the induction machine, an improvement which comprises the AC windings forming seven phases.
Claim 21
Dependent Claim
30 words
A wound type induction machine apparatus according to claim 16 wherein the AC feeder is a frequency converter and the windings fed from the frequency converter are the secondary windings.
Claim 22
Dependent Claim
18 words
A wound type induction machine apparatus according to claim 17 the secondary windings are disposed on a stator.
Claim 23
Dependent Claim
27 words
A wound type induction machine apparatus according to claim 16 wherein the windings fed from the AC feeder are disposed on a stator of the induction machine.
Claim 24
Dependent Claim
22 words
A wound type induction machine apparatus according to claim 19 wherein the primary windings on a rotor are formed in three phases.
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) | 1982-07-16 | 1983-01-15 | 1983-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-16 | 1987-01-15 | 1987-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-16 | 1991-01-15 | 1991-07-17 | $7700.00 | Window Closed / Lapsed |