JPS57145570A - Detection of abnormal photothyristor in converting unit - Google Patents

Detection of abnormal photothyristor in converting unit

Info

Publication number
JPS57145570A
JPS57145570A JP56012763A JP1276381A JPS57145570A JP S57145570 A JPS57145570 A JP S57145570A JP 56012763 A JP56012763 A JP 56012763A JP 1276381 A JP1276381 A JP 1276381A JP S57145570 A JPS57145570 A JP S57145570A
Authority
JP
Japan
Prior art keywords
thyristor
signal
gate
time point
forward voltage
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.)
Granted
Application number
JP56012763A
Other languages
Japanese (ja)
Other versions
JPS6337577B2 (en
Inventor
Atsuo Kobayashi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP56012763A priority Critical patent/JPS57145570A/en
Publication of JPS57145570A publication Critical patent/JPS57145570A/en
Publication of JPS6337577B2 publication Critical patent/JPS6337577B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion

Abstract

PURPOSE:To detect an abnormally functioning thyristor by a method wherein a forward voltage signal is detected after the passage of a prescribed length of time following the yield of a gate controlling signal. CONSTITUTION:When the normal photosignal (gn) is for some reason (b) or (c) and is received by a thyristor gate, the thyristor voltage (Vtn) is also (b) or (c), reflecting the change. In this case, the forward voltage signal (Fn) outputted by the thyristor is also (b) or (c). The thyristor gate function is checked by the difference between the time point of pulse generator driving signal (PH) input and the time point of signal (Fn) disappearance. That is, after the input of the gate input signal (PH), the forward voltage signals (F1-Fn) at the time point (tdb) of all the serially connected thyristors are memorized and, when all the signals indicate ''0'', there are no abnormalities and, when a signal ''1'' is detected coming out of a thyristor, the thyristor is judged to be in an abnormal state.
JP56012763A 1981-01-30 1981-01-30 Detection of abnormal photothyristor in converting unit Granted JPS57145570A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56012763A JPS57145570A (en) 1981-01-30 1981-01-30 Detection of abnormal photothyristor in converting unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56012763A JPS57145570A (en) 1981-01-30 1981-01-30 Detection of abnormal photothyristor in converting unit

Publications (2)

Publication Number Publication Date
JPS57145570A true JPS57145570A (en) 1982-09-08
JPS6337577B2 JPS6337577B2 (en) 1988-07-26

Family

ID=11814433

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56012763A Granted JPS57145570A (en) 1981-01-30 1981-01-30 Detection of abnormal photothyristor in converting unit

Country Status (1)

Country Link
JP (1) JPS57145570A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11235015A (en) * 1998-02-13 1999-08-27 Toshiba Corp Voltage-driven power semiconductor device and method of controlling the gate of the same
JP2009232640A (en) * 2008-03-25 2009-10-08 Toshiba Mitsubishi-Electric Industrial System Corp Series circuit of thyristor with overvoltage protective function

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5265843A (en) * 1975-11-22 1977-05-31 Siemens Ag Method of operating monitor
JPS5546873A (en) * 1978-09-27 1980-04-02 Toshiba Corp Light-triggered thyristor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5265843A (en) * 1975-11-22 1977-05-31 Siemens Ag Method of operating monitor
JPS5546873A (en) * 1978-09-27 1980-04-02 Toshiba Corp Light-triggered thyristor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11235015A (en) * 1998-02-13 1999-08-27 Toshiba Corp Voltage-driven power semiconductor device and method of controlling the gate of the same
JP2009232640A (en) * 2008-03-25 2009-10-08 Toshiba Mitsubishi-Electric Industrial System Corp Series circuit of thyristor with overvoltage protective function

Also Published As

Publication number Publication date
JPS6337577B2 (en) 1988-07-26

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