Electricity: motive power systems – Generator-fed motor systems having generator control – Generator speed control
Reexamination Certificate
2007-05-15
2007-05-15
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Generator-fed motor systems having generator control
Generator speed control
C318S148000, C318S140000, C376S277000, C376S210000, C376S379000, C376S404000, C976SDIG020, C976SDIG020
Reexamination Certificate
active
11214062
ABSTRACT:
A variable-voltage variable-frequency power source for an electric motor that drives a re-circulation pump for a boiling water nuclear reactor. The power source has a semiconductor electric power converter and a speed controller for controlling the semiconductor electric power converter. When a part of the semiconductor electric power converter comes into an inoperative state, that part is electrically disconnected, and the variable-voltage variable-frequency power source temporarily stops outputting power, thereby idling the re-circulation pump. Thereafter, the power source re-starts outputting power before the re-circulation pump completely stops. Thus, the re-circulation pump keeps operating, without stopping.
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Colon Santana Eduardo
Donovan Lincoln
Kabushiki Kaisha Toshiba
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