EP0200081A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Pumping-up generator/motor system and method of operation of the same
Assignee: Kansai Electric Power Co Inc
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Filing: 1986-04-15
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Granted: —
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Expires: 2006-04-15
Abstract
Abstract @ In a pumping-up generator/motor system comprising an induction generator/motor (2), at least one cyclo-converter (3) connected to the secondary winding of the induction generator motor (2) for controlling the rotational speed of the generator/motor in the motor mode and for maintaining the output frequency thereof in the generator mode at a constant level, the center of the speed range of the generator/motor (2) in the generator mode is set near the synchronous speed thereof and a plurality of converter units constituting each cyclo-converter are connected in parallel in the generator mode, and in series in the motor mode thereby allowing the capacity of the cyclo-converter to be made smaller.
Inventors
- 👤 Akira Bando
- 👤 Kenichi Ono
- 👤 Hiroshi Kashiwazaki
- 👤 Hiroshi Sugisaka
- 👤 Eiji Haraguchi
- 👤 Hiroto Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 13:14
CPC Classifications
H; H02; H02P; H02P9/00; H02P9/42; H02P9/007; H02P2101/00; H02P2101/10; Y; Y02; Y02E; Y02E10/00; Y02E10/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
140 words
A pumping-up generator/motor system comprising a water turbine (1), a wound-rotor induction generator/motor (2) connected to said water turbine, said generator/motor being capable of selectively driving in a generator mode or a motor mode while setting a center of operating speed range of the generator/motor in the generator mode near its synchronous speed, at least one cyclo-converter - (3) including a plurality of converter units (6) and connected to a secondary winding of said generator/motor for controlling a rotational speed of the generator/motor driven in the motor mode and an output frequency of the generator/motor driven in the generator mode, and a mode changer (10) for selectively changing the connection of the converter units of each cyclo-converter such that said converter units are connected in parallel to each other in the generator mode and in series in the motor mode.
Claim 2
Dependent Claim
140 words
A pumping-up generator/motor system comprising a water turbine (1), a wound-rotor induction generator/motor (2) connected to said water turbine, said generator/motor being capable of selectively driving in a generator mode or a motor mode while setting a center of operating speed range of the generator/motor in the generator mode near its synchronous speed, at least one cyclo-converter - (3) including a plurality of converter units (6) and connected to a secondary winding of said generator/motor for controlling a rotational speed of the generator/motor driven in the motor mode and an output frequency of the generator/motor driven in the generator mode, and a mode changer (10) for selectively changing the connection of the converter units of each cyclo-converter such that said converter units are connected in parallel to each other in the generator mode and in series in the motor mode.
Claim 3
Dependent Claim
116 words
In a pumping-up generator/motor system comprising a water turbine (1), a wound-rotor induction generator/motor (2) connected to said water turbine, and at least one cyclo-converter (3) connected to a secondary winding of said generator/motor (2) for controlling a rotational speed of the generator/motor driven in the motor mode and an output frequency of the generator/motor driven in a generator mode, a method of operation of said generator/motor system comprising setting a center of operating speed range of the generator/motor in the generator mode near its synchronous speed, and selectively connecting a plurality of converter units (6) constituting each cyclo-converter (3) in parallel to each other in the generator mode and in series in the motor mode.
Claim 4
Dependent Claim
116 words
In a pumping-up generator/motor system comprising a water turbine (1), a wound-rotor induction generator/motor (2) connected to said water turbine, and at least one cyclo-converter (3) connected to a secondary winding of said generator/motor (2) for controlling a rotational speed of the generator/motor driven in the motor mode and an output frequency of the generator/motor driven in a generator mode, a method of operation of said generator/motor system comprising setting a center of operating speed range of the generator/motor in the generator mode near its synchronous speed, and selectively connecting a plurality of converter units (6) constituting each cyclo-converter (3) in parallel to each other in the generator mode and in series in the motor mode.
Claim 5
Dependent Claim
26 words
A method according to Claim 2, further comprising, making a power voltage supplied to each cyclo-converter lower in the generator mode than in the motor mode.
Claim 6
Dependent Claim
43 words
A method according to Claim 3, wherein the voltage supplied to the cyclo-converter (3) in the generator mode is substantially equal to the ratec voltage supplied thereto in the motor mode dividec by the number of the converter units (6) connectec in parallel.
References Cited (Backward Citations)
No citation records indexed.
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