JPS57151298A - Ac generator - Google Patents

Ac generator

Info

Publication number
JPS57151298A
JPS57151298A JP3395981A JP3395981A JPS57151298A JP S57151298 A JPS57151298 A JP S57151298A JP 3395981 A JP3395981 A JP 3395981A JP 3395981 A JP3395981 A JP 3395981A JP S57151298 A JPS57151298 A JP S57151298A
Authority
JP
Japan
Prior art keywords
current
coils
coil
generator
stationary
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP3395981A
Other languages
Japanese (ja)
Inventor
Isao Takahashi
Morihisa Matsumoto
Toru Takei
Utao Nohara
Junichi Makino
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP3395981A priority Critical patent/JPS57151298A/en
Publication of JPS57151298A publication Critical patent/JPS57151298A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/06—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric generators; for synchronous capacitors

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

PURPOSE:To effectively break the defective current of an AC generator by providing two stationary coils connected in series with two independent magnetic circuits and shortcircuiting the one stationary coil when a ground-fault accident or the like occurs in a system, thereby generating the defective current at a zero point. CONSTITUTION:Stationary coils 1, 2 having independent magnetic circuits and connected to a system are connected in series with each other, are excited by exciting coils 5, 6 secured to a rotational shaft 3 which is driven by a prime mover 4, a switch 16 for throwing an impedance 15 is connected to the coil 1, thereby forming a shortcircuit. The coils 1, 2 are excited in reverse direction, the coil 1 is shortcircuited by throwing the switch 16 when a ground-fault accident or the like occurs in a system to enhance the generated voltage of the generator, thereby increasing the AC component of the shortcircuit current. Accordingly, zero current nothing phenomenon is not produced due to the defective current, thereby effectively operating the breaker.
JP3395981A 1981-03-11 1981-03-11 Ac generator Pending JPS57151298A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3395981A JPS57151298A (en) 1981-03-11 1981-03-11 Ac generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3395981A JPS57151298A (en) 1981-03-11 1981-03-11 Ac generator

Publications (1)

Publication Number Publication Date
JPS57151298A true JPS57151298A (en) 1982-09-18

Family

ID=12401021

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3395981A Pending JPS57151298A (en) 1981-03-11 1981-03-11 Ac generator

Country Status (1)

Country Link
JP (1) JPS57151298A (en)

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