US3566168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Eddy current rotary machine having torque transmission arrangement
Assignee: Yaskawa Electric Corp
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Filing: 1969-06-30
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Granted: 1971-02-23
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Expires: 1989-06-30
Abstract
Abstract The eddy-current element in a torque transmitting device is formed from two concentric radially spaced apart drums. An annular array of inductor members is inserted in the space between the drums from one end and a magnetic field generating yoke is inserted between the drums from the other end. The drums, consisting of magnetic material, are supported in spaced relation by nonmagnetic means interposed between the drums intermediate the ends between the inductor members on the one hand and the yoke on the other hand. Efficient cooling is afforded by a series of holes in the drums and the provision of fan blades for impelling air through the holes.
Inventors
- 👤 Toshiya Matsubara
- 👤 Yoshibumi Taniwaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:57
CPC Classifications
H; H02; H02K; H02K49/00; H02K49/02; H02K49/04; H02K49/043
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
185 words
An eddy-current rotary machine comprising in combination: a first structure having at least two concentric eddy-current drums of magnetic material supported with a radial gap therebetween by nonmagnetic means interposed between said drums intermediate the ends thereof, said first structure being rotatably mounted for rotation about an axis concentric with said drums; a plurality of inductor members disposed in a circular array concentric with said axis and forming an inductor disposed in said gap between said drums on one side of said nonmagnetic means; said inductor constituting a second structure and being rotatably mounted for rotation about an axis coaxially with said first structure; a yoke member disposed in said gap between said drums on the other side of said nonmagnetic means from said inductor; exciting means for generating a magnetic flux passing through and linking said inductor, said yoke member, and both of said drums; anD driving means coupled to one of said structures for causing it to rotate relative to the other structure for producing eddy-currents in both of said drums to transmit a torque from said driven structure to the other structure.
Claim 2
Dependent Claim
185 words
An eddy-current rotary machine comprising in combination: a first structure having at least two concentric eddy-current drums of magnetic material supported with a radial gap therebetween by nonmagnetic means interposed between said drums intermediate the ends thereof, said first structure being rotatably mounted for rotation about an axis concentric with said drums; a plurality of inductor members disposed in a circular array concentric with said axis and forming an inductor disposed in said gap between said drums on one side of said nonmagnetic means; said inductor constituting a second structure and being rotatably mounted for rotation about an axis coaxially with said first structure; a yoke member disposed in said gap between said drums on the other side of said nonmagnetic means from said inductor; exciting means for generating a magnetic flux passing through and linking said inductor, said yoke member, and both of said drums; anD driving means coupled to one of said structures for causing it to rotate relative to the other structure for producing eddy-currents in both of said drums to transmit a torque from said driven structure to the other structure.
Claim 3
Dependent Claim
30 words
An eddy-current rotary machine as claimed in claim 1, in which ventilating holes are provided in the drums for ventilation of the space between the inductor and the yoke member.
Claim 4
Dependent Claim
22 words
An eddy-current rotary machine as claimed in claim 2, in which ventilating fins are provided bridging the ventilating holes of the drums.
Claim 5
Dependent Claim
45 words
An eddy-current rotary machine as claimed in claim 1, in which the inductor members of the inductor are each divided into several concentric layers, and an additional eddy-current generating drum is mounted on said first structure and disposed between adjacent layers of said divided layers.
Claim 6
Dependent Claim
87 words
An eddy-current rotary machine as claimed in claim 2, in which shields are supported adjacent the ends of said drums to provide an air baffle between the drums and the yoke member on one side and between the drums and the inductor on the other side, and the ventilating holes in one of said drums are in registration with corresponding holes of the other of said drums with plates spanning the space between the drums around opposite holes to shield the yoke member and inductor from dust.
Claim 7
Dependent Claim
75 words
An eddy-current rotary machine as claimed in claim 1, in which the driving means is coupled to said second structure and is in the form of a shaft, and wherein a partition plate is mounted on said shaft for rotation, fan elements are provided on both sides of said partition plate radially spaced from said shaft, and said inductor members are joined to the fan elements on the side of said partition facing said drums.
Claim 8
Dependent Claim
137 words
An eddy-current rotary machine which comprises a driven shaft supported by a machine frame having ventilating holes; an electric motor enclosed in said machine frame and consisting of a stator and a rotator, the rotator being supported by a hollow shaft through which said driven shaft passes; an eddy-current generator consisting of mutually opposed concentric radially spaced apart magnetic drums supported by said driven shaft adjacent one end of said hollow shaft; a plurality of inductor members inserted in the space between said drums and supported by said hollow shaft; an exciting winding supported in the space between said drums by the machine frame; and a double fan type ventilating fan supported by said hollow shaft positioned between said electric motor and said eddy-current generator, whereby said motor and generator portions in the frame are effectively cooled.
Claim 9
Dependent Claim
137 words
An eddy-current rotary machine which comprises a driven shaft supported by a machine frame having ventilating holes; an electric motor enclosed in said machine frame and consisting of a stator and a rotator, the rotator being supported by a hollow shaft through which said driven shaft passes; an eddy-current generator consisting of mutually opposed concentric radially spaced apart magnetic drums supported by said driven shaft adjacent one end of said hollow shaft; a plurality of inductor members inserted in the space between said drums and supported by said hollow shaft; an exciting winding supported in the space between said drums by the machine frame; and a double fan type ventilating fan supported by said hollow shaft positioned between said electric motor and said eddy-current generator, whereby said motor and generator portions in the frame are effectively cooled.
References Cited (Backward Citations)
US1808845A
Cited
US2099050A
Cited
US2542138A
Cited
US2630466A
Cited
US2871383A
Cited
US2908834A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |