FR2400285A1 - HV zero crossing detector - has transistor blocking oscillator with base connected to voltage divider and bridge rectifier - Google Patents

HV zero crossing detector - has transistor blocking oscillator with base connected to voltage divider and bridge rectifier

Info

Publication number
FR2400285A1
FR2400285A1 FR7724407A FR7724407A FR2400285A1 FR 2400285 A1 FR2400285 A1 FR 2400285A1 FR 7724407 A FR7724407 A FR 7724407A FR 7724407 A FR7724407 A FR 7724407A FR 2400285 A1 FR2400285 A1 FR 2400285A1
Authority
FR
France
Prior art keywords
rectifier
zero crossing
voltage
crossing detector
voltage divider
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
FR7724407A
Other languages
French (fr)
Other versions
FR2400285B1 (en
Inventor
Lev Viktorovich Travin
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.)
ELEKTROTEKHNICHESKY INST
Original Assignee
ELEKTROTEKHNICHESKY INST
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 ELEKTROTEKHNICHESKY INST filed Critical ELEKTROTEKHNICHESKY INST
Priority to FR7724407A priority Critical patent/FR2400285A1/en
Publication of FR2400285A1 publication Critical patent/FR2400285A1/en
Application granted granted Critical
Publication of FR2400285B1 publication Critical patent/FR2400285B1/fr
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
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
    • H02M1/092—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices the control signals being transmitted optically
    • 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
    • G01R19/175—Indicating the instants of passage of current or voltage through a given value, e.g. passage through zero
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/153—Arrangements in which a pulse is delivered at the instant when a predetermined characteristic of an input signal is present or at a fixed time interval after this instant
    • H03K5/1536—Zero-crossing detectors

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

The zero crossing detector is for use with high voltage circuits, e.g. contrd. circuits for h.v. transistors in rectifiers for h.v. d.c. transmission systems. The voltage to be supervised is taken from a voltage divider (33, 2) and fed to a rectifier (25, 26, 27, 28). A connection from the rectifier is taken via a capacitor (39) to the base of a switching transistor (13) in a blocking oscillator circuit. The transistor's emitter is connected to the common point of two capacitors (37, 38) across the rectifier whose voltages are limited by zener diodes (35, 36). A dynistor (23) inhibits operation of the oscillator during charging of the reservoir capacitors (34, 37, 38). Only a positive signal on the base will trigger the oscillator. This signal exists only when the voltage at the divider output (33) is changing about zero and the rectifier diodes (26, 28) are still non-conducting.
FR7724407A 1977-08-08 1977-08-08 HV zero crossing detector - has transistor blocking oscillator with base connected to voltage divider and bridge rectifier Granted FR2400285A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7724407A FR2400285A1 (en) 1977-08-08 1977-08-08 HV zero crossing detector - has transistor blocking oscillator with base connected to voltage divider and bridge rectifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7724407A FR2400285A1 (en) 1977-08-08 1977-08-08 HV zero crossing detector - has transistor blocking oscillator with base connected to voltage divider and bridge rectifier

Publications (2)

Publication Number Publication Date
FR2400285A1 true FR2400285A1 (en) 1979-03-09
FR2400285B1 FR2400285B1 (en) 1980-04-11

Family

ID=9194359

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7724407A Granted FR2400285A1 (en) 1977-08-08 1977-08-08 HV zero crossing detector - has transistor blocking oscillator with base connected to voltage divider and bridge rectifier

Country Status (1)

Country Link
FR (1) FR2400285A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2468251A1 (en) * 1979-10-20 1981-04-30 Plessey Overseas THYRISTOR POWER CONTROL CIRCUIT

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2468251A1 (en) * 1979-10-20 1981-04-30 Plessey Overseas THYRISTOR POWER CONTROL CIRCUIT

Also Published As

Publication number Publication date
FR2400285B1 (en) 1980-04-11

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Legal Events

Date Code Title Description
ST Notification of lapse