JPS56129922A - Driving circuit for cooling fan - Google Patents

Driving circuit for cooling fan

Info

Publication number
JPS56129922A
JPS56129922A JP3266880A JP3266880A JPS56129922A JP S56129922 A JPS56129922 A JP S56129922A JP 3266880 A JP3266880 A JP 3266880A JP 3266880 A JP3266880 A JP 3266880A JP S56129922 A JPS56129922 A JP S56129922A
Authority
JP
Japan
Prior art keywords
fan
signal
cooling fan
produces
operated
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
JP3266880A
Other languages
Japanese (ja)
Inventor
Keigo Koyama
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 JP3266880A priority Critical patent/JPS56129922A/en
Publication of JPS56129922A publication Critical patent/JPS56129922A/en
Pending 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
    • G05D23/1906—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

Abstract

PURPOSE:To enable to use the device for a long time, by operating the fan when the element is operated or the ambient temperature exceeds a given value, in the device incorporating the element having the upper limit of the operating temperature and the cooling fan. CONSTITUTION:When a voltage (a) is given from the power supply circuit 2, magnetic tape storage device 3 is operatable, the device 3 is operated with the control signal, the servo motor and the like is operated, then the signal (b) is produced. The logic driving circuit 5 produces the output signal (d) to turn the cooling fan 4 for cooling. Further, the ambient temperature increases due to any cause and reaches a given temperature, the ambient temperature detection circuit 6 produces the signal (c). Thus, the circuit 5 produces the signal (d), the fan 4 starts operation of ventilation, allowing to cool so that the elements like servo motor are not at high temperature. Because the time of the cooling fan 4 in actual operation is considerably shorter than the time of power supply application, the device 3 including the fan 4 can be used for a long time.
JP3266880A 1980-03-17 1980-03-17 Driving circuit for cooling fan Pending JPS56129922A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3266880A JPS56129922A (en) 1980-03-17 1980-03-17 Driving circuit for cooling fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3266880A JPS56129922A (en) 1980-03-17 1980-03-17 Driving circuit for cooling fan

Publications (1)

Publication Number Publication Date
JPS56129922A true JPS56129922A (en) 1981-10-12

Family

ID=12365246

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3266880A Pending JPS56129922A (en) 1980-03-17 1980-03-17 Driving circuit for cooling fan

Country Status (1)

Country Link
JP (1) JPS56129922A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS629808U (en) * 1985-06-28 1987-01-21

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS629808U (en) * 1985-06-28 1987-01-21

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