Title:
【発明の名称】電力変換システムで使用される極低温に冷却された電力素子の制御回路
Document Type and Number:
Japanese Patent JPH10507336
Kind Code:
A
Abstract:
A control circuit generates signals for controlling the sequence in which selected input signals are carried across the terminals of a polyphase switching conversion circuit. The control circuit includes switching elements galvanically isolated from the selected input signals with the control signals electrically isolated from the switching devices. The control circuit for the conversion circuit is, in essence, electrically isolated from the conversion circuit. The control circuit is configured to have a topology analogous to that of the switching converter and includes conventional switching diodes as well as a light generating device optically coupled to a light sensor which, in response to detection of light from the optically coupled light generating device, provides a control signal to a corresponding switching device. The control circuit also includes a source of regulated and electrically isolated power to operate drive circuitry for the switching devices. The cryogenically cooled switching converter is used to rectify AC input signals generated by a number of variable speed wind-driven turbines, into a DC output signal which can be re-converted into a fixed frequency AC signal, stored, or conveyed via a cryogenically cooled superconducting line to a remote location. A power generation system includes cryogenically cooled power conversion circuitry for converting alternating current (AC) input signals which have naturally occurring, fluctuating frequency characteristics, into a direct current output signal. The control circuit, described above, may be used to control the power conversion circuitry.
Inventors:
Gold karman
Mueller Autoward
Shemp Ellie F
Mueller Autoward
Shemp Ellie F
Application Number:
JP50808795A
Publication Date:
July 14, 1998
Filing Date:
August 03, 1995
Export Citation:
Assignee:
American Superconductor Corporation
International Classes:
H02J3/28; H02M1/08; H02M1/084; H02M5/458; H02M7/00; H02M7/219; (IPC1-7): H02M7/219; H02J3/28; H02M7/48
Domestic Patent References:
| JPS63503515A | 1988-12-22 | |||
| JPH03500164A | 1991-01-17 | |||
| JPH02503555A | 1990-10-25 | |||
| JPH04502492A | 1992-05-07 |
Attorney, Agent or Firm:
Minoru Nakamura (6 outside)