JPS5735759A - Current detecting circuit for thyristor converter - Google Patents

Current detecting circuit for thyristor converter

Info

Publication number
JPS5735759A
JPS5735759A JP11026980A JP11026980A JPS5735759A JP S5735759 A JPS5735759 A JP S5735759A JP 11026980 A JP11026980 A JP 11026980A JP 11026980 A JP11026980 A JP 11026980A JP S5735759 A JPS5735759 A JP S5735759A
Authority
JP
Japan
Prior art keywords
current
signal
output
gate block
reverse side
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
JP11026980A
Other languages
Japanese (ja)
Inventor
Masahiro Tobiyo
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 JP11026980A priority Critical patent/JPS5735759A/en
Publication of JPS5735759A publication Critical patent/JPS5735759A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/145—Indicating the presence of current or voltage
    • G01R19/15—Indicating the presence of current

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Rectifiers (AREA)
  • Control Of Direct Current Motors (AREA)

Abstract

PURPOSE:To detect d.c. current equivalently including polarity with one set of current transformers and without using insulating amplifier by combining a gate block signal and output signal of current transformer. CONSTITUTION:Output of electric power source 1 is applied to a d.c. motor 6 through a positive side thyrstor cnverter 3 and a reverse side thyristor converter 4 which are controlled by a positive side gate block release signal 10 and a reverse side gate block release signal 11. On the other hand, output of a current transformer 2 is applied to a subtracter 20 through a rectifier 8 and a resistor 9. At the same time, output of the resistor 9 is applied to the substracter 20 through a relay controlled by a gain circuit 19 and the reverse side gate block release signal 11, and an equivalent d.c. signal I6 of polarity corresponding to d.c. current ID is obtained. By this way, detection can be made without using an expensive insulating amplifier and two sets of current transformers, and the cost of the detecting circuit can be reduced.
JP11026980A 1980-08-13 1980-08-13 Current detecting circuit for thyristor converter Pending JPS5735759A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11026980A JPS5735759A (en) 1980-08-13 1980-08-13 Current detecting circuit for thyristor converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11026980A JPS5735759A (en) 1980-08-13 1980-08-13 Current detecting circuit for thyristor converter

Publications (1)

Publication Number Publication Date
JPS5735759A true JPS5735759A (en) 1982-02-26

Family

ID=14531395

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11026980A Pending JPS5735759A (en) 1980-08-13 1980-08-13 Current detecting circuit for thyristor converter

Country Status (1)

Country Link
JP (1) JPS5735759A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4828914A (en) * 1971-08-20 1973-04-17

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4828914A (en) * 1971-08-20 1973-04-17

Similar Documents

Publication Publication Date Title
JPS484924A (en)
JPS6439222A (en) Circuit breaker
JPS5735759A (en) Current detecting circuit for thyristor converter
SE7708102L (en) DEVICE FOR AN AC SWITCH CONTROLLER
JPS56112881A (en) Controlling device for frequency converter
JPS6481685A (en) Current detection circuit
JPS5755772A (en) Positive and negative switching method of power converter
JPS55160904A (en) Method and device for controlling dc compound motor for electric rolling stock
JPS56153994A (en) Commutation failure preventing circuit of converter for linear thyristor motor
JPS5743582A (en) Induction electromotive force detection device for dc motor
JPS54128846A (en) Elevation control system for arc furnace electrode
JPS5558781A (en) Inverter
JPS5685122A (en) Power factor improving circuit
JPS5710461A (en) Dc detector
JPS57142164A (en) Fault detector for secondary circuit in wound-rotor type induction motor
JPS6469267A (en) Voltage detector for inverter
JPS5343316A (en) Operation control system for electric car
JPS5759217A (en) Direct-current feeding device
JPS5728600A (en) Generator
JPS57202896A (en) Controller for dc motor
JPS54145949A (en) Automatic voltage fluctuation range controller
JPS56145796A (en) Detecting circuit for maximum current
JPS5539918A (en) Voltage and current output circuit
JPS56132616A (en) Current detecting circuit
JPS56140763A (en) Supply system of circuit current