US3858069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exciter assembly for electric machines with revolving rectifiers
Assignee: Kraftwerk Union AG
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Filing: 1973-03-09
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Granted: 1974-12-31
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Expires: 1993-03-09
Abstract
Abstract In an exciter assembly for electric machines, such as synchronous generators, the carrier wheel for the revolving rectifiers is formed of a disc-shaped hub having disposed on both sides and at the periphery thereof, light-metal rings which are insulatedly threadedly secured to the hub and by shoulders or extensions overlapping the outer hub periphery, are shrinkfitted on the hub. Each of the light-metal rings, which forms a direct current pole, carries rectifier diodes, that are directly threadedly secured to the respective ring, as well as insulatedly fastened fuses.
Inventors
- 👤 H Kuter
- 👤 H Lenting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:03
CPC Classifications
H; H02; H02K; H02K11/00; H02K11/04; H02K11/042
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
149 words
Exciter assembly for an electric machine, such as a synchronous generator having a rotary shaft and an exciter winding, comprising an alternating-current exciter machine having an armature, a plurality of revolving rectifiers connectible between said armature and the exciter winding of the electric machine for feeding exciting current thereto, and a carrier wheel for said revolving rectifiers securable to the shaft of the electric machine, said carrier wheel comprising a disc-shaped hub, a pair of light-metal rings respectively mounted on both sides of said disc-shaped hub at the periphery thereof, said light-metal rings being insulated from said hub and secured to said hub by a bolt and by means of respective shoulders overlapping the periphery of said hub, and being shrink-fitted on said hub, each of said light-metal rings forming a direct-current pole carrying rectifier diodes that are directly threadedly secured thereto, and fuses insulatedly fastened to said rings.
Claim 2
Dependent Claim
149 words
Exciter assembly for an electric machine, such as a synchronous generator having a rotary shaft and an exciter winding, comprising an alternating-current exciter machine having an armature, a plurality of revolving rectifiers connectible between said armature and the exciter winding of the electric machine for feeding exciting current thereto, and a carrier wheel for said revolving rectifiers securable to the shaft of the electric machine, said carrier wheel comprising a disc-shaped hub, a pair of light-metal rings respectively mounted on both sides of said disc-shaped hub at the periphery thereof, said light-metal rings being insulated from said hub and secured to said hub by a bolt and by means of respective shoulders overlapping the periphery of said hub, and being shrink-fitted on said hub, each of said light-metal rings forming a direct-current pole carrying rectifier diodes that are directly threadedly secured thereto, and fuses insulatedly fastened to said rings.
Claim 3
Dependent Claim
78 words
Exciter assembly according to claim 1, wherein said alternating-current exciter machine includes a pair of pressure rings retaininG core plates for a multiphase current winding on said armature, one of said pressure rings facing toward said carrier wheel and having a ring conducting system to which said multiphase current winding is connected, said conducting system being further connected to said rectifiers through connecting members received in grooves formed at the periphery of the shaft of said electric machine.
Claim 4
Dependent Claim
71 words
Exciter assembly according to claim 1, wherein, respectively, a rectifier diode and a respective fuse therefor are disposed adjacent one another in peripheral direction on the inner periphery of the respective light-metal ring, said rectifier diode having a radially inwardly extending connector, and said fuse having a radially outwardly extending connector, and a strap connecting said inwardly extending connector of said rectifier diode to said outwardly extending connector of said fuse.
Claim 5
Dependent Claim
21 words
Exciter assembly according to claim 1, wherein two fuses are disposed in mutual alignment on both sides of said hub, respectively.
Claim 6
Dependent Claim
21 words
Exciter assembly according to claim 1, wherein two diodes are disposed in mutual alignment on both sides of said hub, respectively.
Claim 7
Dependent Claim
39 words
Exciter assembly according to claim 1, wherein two fuses, respectively, are located opposite one another and have respective radially inwardly extending connectors, and including a bolt extending through said hub and connecting said inwardly extending connectors to one another.
Claim 8
Dependent Claim
45 words
Exciter assembly according to claim 1, wherein said exciter machine includes a multiphase current winding on said armature thereof, and a respective plurality of connectors successively disposed in peripheral direction of said hub and being connected with one phase connection of said multiphase current winding.
Claim 9
Dependent Claim
53 words
Exciter assembly according to claim 1, wherein, to reduce the voltage peaks, a plurality of circuit blocks having a respective series circuit including capacitance and resistance are connected between both of said direct-current poles, said circuit blocks extending through openings in said hub and being supported respectively on both of said light-metal rings.
Claim 10
Dependent Claim
34 words
Exciter assembly according to claim 1, wherein said armature and said direct-current carrier wheel are mounted on an end of the electric machine shaft at a location beyond a bearing support for the shaft.
Claim 11
Dependent Claim
34 words
Exciter assembly according to claim 9, wherein the end of the electric machine shaft has a further coupling for driving the electric machine from that end as well as from the other end thereof.
Claim 12
Dependent Claim
35 words
Exciter assembly according to claim 9, wherein the electric machine is a generator, and said exciter machine and said rectifier wheel are cooled by cool air supplied from a pressure chamber located in the generator.
Claim 13
Dependent Claim
55 words
Exciter assembly according to claim 11, wherein said housing has an upper part and, between said upper housing part and a bearing end plate of the generator, there is disposed a removable connecting pipe having channels therein for supplying fresh cooling air to and removing spent cooling air from said exciter machine and said rectifiers.
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) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |