FR2321813A1 - Control circuit for electric heating - has triac in series with heating element and hysteresis greatly increased by shorting resistor in temp. monitor (NO 21.3.77) - Google Patents

Control circuit for electric heating - has triac in series with heating element and hysteresis greatly increased by shorting resistor in temp. monitor (NO 21.3.77)

Info

Publication number
FR2321813A1
FR2321813A1 FR7625348A FR7625348A FR2321813A1 FR 2321813 A1 FR2321813 A1 FR 2321813A1 FR 7625348 A FR7625348 A FR 7625348A FR 7625348 A FR7625348 A FR 7625348A FR 2321813 A1 FR2321813 A1 FR 2321813A1
Authority
FR
France
Prior art keywords
triac
series
temp
monitor
control circuit
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
FR7625348A
Other languages
French (fr)
Other versions
FR2321813B3 (en
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.)
NOBO FABRIKKER
Original Assignee
NOBO FABRIKKER
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 NOBO FABRIKKER filed Critical NOBO FABRIKKER
Publication of FR2321813A1 publication Critical patent/FR2321813A1/en
Application granted granted Critical
Publication of FR2321813B3 publication Critical patent/FR2321813B3/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
    • G05D23/1909—Control of temperature characterised by the use of electric means using an analogue comparing device whose output amplitude can only take two discrete values

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Electrical Variables (AREA)
  • Power Conversion In General (AREA)
  • Control Of Resistance Heating (AREA)

Abstract

The heating circuit consists of a heating element (14) in series with a triac (13) controlled from a trigger (5). The trigger is itself controlled by a zero-volts detector (4) coupled to the heating supply and by a differential amplifier (3) supplied with voltages representing the element's actual and required temperatures.
FR7625348A 1975-08-20 1976-08-20 Control circuit for electric heating - has triac in series with heating element and hysteresis greatly increased by shorting resistor in temp. monitor (NO 21.3.77) Granted FR2321813A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO752892A NO752892L (en) 1975-08-20 1975-08-20

Publications (2)

Publication Number Publication Date
FR2321813A1 true FR2321813A1 (en) 1977-03-18
FR2321813B3 FR2321813B3 (en) 1979-05-18

Family

ID=19882421

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7625348A Granted FR2321813A1 (en) 1975-08-20 1976-08-20 Control circuit for electric heating - has triac in series with heating element and hysteresis greatly increased by shorting resistor in temp. monitor (NO 21.3.77)

Country Status (5)

Country Link
DK (1) DK371076A (en)
FI (1) FI762367A (en)
FR (1) FR2321813A1 (en)
NO (1) NO752892L (en)
SE (1) SE7609240L (en)

Also Published As

Publication number Publication date
FI762367A (en) 1977-02-21
DK371076A (en) 1977-02-21
FR2321813B3 (en) 1979-05-18
SE7609240L (en) 1977-02-21
NO752892L (en) 1977-02-22

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Legal Events

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