JPS54140125A - Brushless exciting device - Google Patents

Brushless exciting device

Info

Publication number
JPS54140125A
JPS54140125A JP4659078A JP4659078A JPS54140125A JP S54140125 A JPS54140125 A JP S54140125A JP 4659078 A JP4659078 A JP 4659078A JP 4659078 A JP4659078 A JP 4659078A JP S54140125 A JPS54140125 A JP S54140125A
Authority
JP
Japan
Prior art keywords
current
voltage
rotary transformer
primary
field current
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
JP4659078A
Other languages
Japanese (ja)
Inventor
Toshiaki Okuyama
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 JP4659078A priority Critical patent/JPS54140125A/en
Publication of JPS54140125A publication Critical patent/JPS54140125A/en
Pending legal-status Critical Current

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  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE: To form to detect field current by difference between integrated value of impressed voltage of stator winding in rotary transformer and electric current of stator winding.
CONSTITUTION: Field current is detected indirectly, based on electric current and voltage of primary winding W1 of rotary transformer 3. On the other hand, although secondary current of rotary transformer 3 or alternating current input current of thyristor converter 5 is in proportional relation to field current, signal e0 of the equation can be obtained by integrating primary voltage, because primary current of the rotary transformer 3 is not proportioned to field current. This voltage e0 is equivalent to field current, and field current can be detected by calculating the difference of primary current and voltage e0.
COPYRIGHT: (C)1979,JPO&Japio
JP4659078A 1978-04-21 1978-04-21 Brushless exciting device Pending JPS54140125A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4659078A JPS54140125A (en) 1978-04-21 1978-04-21 Brushless exciting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4659078A JPS54140125A (en) 1978-04-21 1978-04-21 Brushless exciting device

Publications (1)

Publication Number Publication Date
JPS54140125A true JPS54140125A (en) 1979-10-31

Family

ID=12751498

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4659078A Pending JPS54140125A (en) 1978-04-21 1978-04-21 Brushless exciting device

Country Status (1)

Country Link
JP (1) JPS54140125A (en)

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