GB1473097A - - Google Patents

Info

Publication number
GB1473097A
GB1473097A GB2144873A GB2144873A GB1473097A GB 1473097 A GB1473097 A GB 1473097A GB 2144873 A GB2144873 A GB 2144873A GB 2144873 A GB2144873 A GB 2144873A GB 1473097 A GB1473097 A GB 1473097A
Authority
GB
United Kingdom
Prior art keywords
switch
engine
transistor
engine temperature
fan
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.)
Expired
Application number
GB2144873A
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 filed Critical
Priority to GB2144873A priority Critical patent/GB1473097A/en
Priority to FR7415441A priority patent/FR2228151B1/fr
Publication of GB1473097A publication Critical patent/GB1473097A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K19/00—Synchronous motors or generators
    • H02K19/16—Synchronous generators
    • H02K19/26—Synchronous generators characterised by the arrangement of exciting windings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/02—Controlling of coolant flow the coolant being cooling-air
    • F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
    • F01P7/048—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using electrical drives
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

1473097 Axial-flow fans SIMMS GROUP RESEARCH & DEVELOPMENT Ltd 4 April 1974 [4 May 1973] 21448/73 Heading F1C [Also in Divisions G3 and H2] In a drive system for a I.C. engine cooling fan 11, comprising an electric motor 10 and a generator drivable by the engine to generate electrical power for the motor, means 15 are provided for controlling the excitation of a field winding 14 of the generator and thus the speed of the fan. The generator comprises a three-phase alternator 13 connected to the motor 10 via rectifier unit 12. The means 15 is responsive to engine coolant temperature and includes a thermally-actuated switch 36 in a potentiometer line connected across an accumulator 18. The switch is closed when the engine is cold so that a Zener diode 30 conducts and renders transistor 26 conductive to switch off transistor 22 and thus transistor 19 in series with the field winding 14. When the engine temperature reaches a certain value the switch 36 opens, whereby diode 30 and transistor 26 become non- conductive and thus allow the transistors 22, 19 to conduct to provide a field current through the winding 14 and operate the motor 10. As the alternator output increases a voltage is reached at which the diode 30 once more becomes conductive thereby switching off the transistors 22, 19 and current flow to the winding 14. The process is then repeated. The fan speed is settable by resistor 35. Fall in engine temperature closes the switch 36 and thus prevents fan operation until the engine temperature increases again. The resistor 34 may be replaced by a thermistor responsive to engine temperature so that when the switch 36 is open the fan speed is increased with increases in engine temperature. When a thermistor is used, the switch 36 may be omitted and an isolating switch provided between line 16 and accumulator 18.
GB2144873A 1973-05-04 1973-05-04 Expired GB1473097A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2144873A GB1473097A (en) 1973-05-04 1973-05-04
FR7415441A FR2228151B1 (en) 1973-05-04 1974-05-03

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2144873A GB1473097A (en) 1973-05-04 1973-05-04

Publications (1)

Publication Number Publication Date
GB1473097A true GB1473097A (en) 1977-05-11

Family

ID=10163122

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2144873A Expired GB1473097A (en) 1973-05-04 1973-05-04

Country Status (2)

Country Link
FR (1) FR2228151B1 (en)
GB (1) GB1473097A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4124001A (en) * 1976-06-30 1978-11-07 Fmc Corporation Electronic speed control for a variable speed fan drive
FR2455173A2 (en) * 1977-03-16 1980-11-21 Sev Marchal Cooling system for engine - has radiator by=pass circuit for rapid warm up with thermostat valves controlling pump and electric fan
FR2455174A2 (en) * 1979-04-23 1980-11-21 Sev Marchal Coolant temperature regulation for internal combustion engines - has a calculator operated shunt path across the radiator
FR2484532B1 (en) * 1980-06-16 1985-08-23 Peugeot Aciers Et Outillage DEVICE FOR CONTROLLING THE VENTILATION MEANS OF AN INTERNAL COMBUSTION ENGINE

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3629676A (en) * 1970-04-09 1971-12-21 Gen Motors Corp Traction motor temperature control of locomotive power

Also Published As

Publication number Publication date
FR2228151B1 (en) 1976-12-17
FR2228151A1 (en) 1974-11-29

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee