FR2371726A1 - Control of triac in series with motor load - utilises load current inversion detector to control triac switch - Google Patents

Control of triac in series with motor load - utilises load current inversion detector to control triac switch

Info

Publication number
FR2371726A1
FR2371726A1 FR7634738A FR7634738A FR2371726A1 FR 2371726 A1 FR2371726 A1 FR 2371726A1 FR 7634738 A FR7634738 A FR 7634738A FR 7634738 A FR7634738 A FR 7634738A FR 2371726 A1 FR2371726 A1 FR 2371726A1
Authority
FR
France
Prior art keywords
triac
control
series
current inversion
motor
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
FR7634738A
Other languages
French (fr)
Other versions
FR2371726B1 (en
Inventor
Jacques Guerin-Pinaud
Michel Tailhades
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.)
Radiotechnique Compelec RTC SA
Original Assignee
Radiotechnique Compelec RTC SA
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 Radiotechnique Compelec RTC SA filed Critical Radiotechnique Compelec RTC SA
Priority to FR7634738A priority Critical patent/FR2371726A1/en
Publication of FR2371726A1 publication Critical patent/FR2371726A1/en
Application granted granted Critical
Publication of FR2371726B1 publication Critical patent/FR2371726B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
    • G05F1/40—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices
    • G05F1/44—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only
    • G05F1/45—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only being controlled rectifiers in series with the load
    • G05F1/452—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only being controlled rectifiers in series with the load with pulse-burst modulation control

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

A triac in series with an AC mains supply switches and controls a motor in household goods such as a washing machine. Parasitic RF radiation and motor torque variations are reduced by a current inversion detector circuit in series with the mains supply. An alternating current flowing in a motor (3) via a triac (5) develops a voltage across a low value resistor (4) with shunt diodes (6, 7) and connected to two conductor rails (11, 31). This voltage is applied to two transistors (29, 30) whose bases are connected to two conductor rails (10, 11) forming a current inversion detector. The transistors alternately conduct and are blocked depending on polarity of voltage across the resistor (4). The triac conducts only when both transistors conduct together.
FR7634738A 1976-11-18 1976-11-18 Control of triac in series with motor load - utilises load current inversion detector to control triac switch Granted FR2371726A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7634738A FR2371726A1 (en) 1976-11-18 1976-11-18 Control of triac in series with motor load - utilises load current inversion detector to control triac switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7634738A FR2371726A1 (en) 1976-11-18 1976-11-18 Control of triac in series with motor load - utilises load current inversion detector to control triac switch

Publications (2)

Publication Number Publication Date
FR2371726A1 true FR2371726A1 (en) 1978-06-16
FR2371726B1 FR2371726B1 (en) 1980-03-28

Family

ID=9180051

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7634738A Granted FR2371726A1 (en) 1976-11-18 1976-11-18 Control of triac in series with motor load - utilises load current inversion detector to control triac switch

Country Status (1)

Country Link
FR (1) FR2371726A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141213A1 (en) * 1983-10-21 1985-05-15 Robert Bosch Gmbh Current-controlled semiconductor relay
EP0477643A2 (en) * 1990-09-28 1992-04-01 Otis Elevator Company Control of a discontinuous current by a thyristor rectifier with inductive load

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141213A1 (en) * 1983-10-21 1985-05-15 Robert Bosch Gmbh Current-controlled semiconductor relay
EP0477643A2 (en) * 1990-09-28 1992-04-01 Otis Elevator Company Control of a discontinuous current by a thyristor rectifier with inductive load
EP0477643A3 (en) * 1990-09-28 1994-01-12 Otis Elevator Co

Also Published As

Publication number Publication date
FR2371726B1 (en) 1980-03-28

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Legal Events

Date Code Title Description
ST Notification of lapse