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DE2463178A1 - Drive unit for video tape recorder - has electronically-commutated DC motor with bearings simultaneously acting as rotary head bearings - Google Patents

Drive unit for video tape recorder - has electronically-commutated DC motor with bearings simultaneously acting as rotary head bearings

Info

Publication number
DE2463178A1
DE2463178A1 DE19742463178 DE2463178A DE2463178A1 DE 2463178 A1 DE2463178 A1 DE 2463178A1 DE 19742463178 DE19742463178 DE 19742463178 DE 2463178 A DE2463178 A DE 2463178A DE 2463178 A1 DE2463178 A1 DE 2463178A1
Authority
DE
Grant status
Application
Patent type
Prior art keywords
motor
head
bearings
drum
video
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
DE19742463178
Other versions
DE2463178C2 (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.)
Telefunken Fernseh und Rundfunk GmbH
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

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/76Television signal recording
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/76Television signal recording
    • H04N5/78Television signal recording using magnetic recording
    • H04N5/782Television signal recording using magnetic recording on tape

Abstract

The drive unit, for a video tape recorder, has an electronically-commutated d.c. motor driving the drum that carries the video head. The motor bearings simultaneously act as bearings for the rotating part of the drum. The fixed, stationary part of the drum is flanged to the motor's end-plate. Apart from the electronic commutation, another circuit regulates the head's phase and speed according to a reference signal. Since the drive uses electronic commutation all acoustic and electrical noise from brushes is avoided. The construction also increases the motor's efficiency by avoiding thermal losses to the rotating head.
DE19742463178 1974-02-18 1974-02-18 Expired DE2463178C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19742463178 DE2463178C2 (en) 1974-02-18 1974-02-18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742463178 DE2463178C2 (en) 1974-02-18 1974-02-18

Publications (2)

Publication Number Publication Date
DE2463178A1 true true DE2463178A1 (en) 1983-01-13
DE2463178C2 DE2463178C2 (en) 1984-11-08

Family

ID=5935090

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19742463178 Expired DE2463178C2 (en) 1974-02-18 1974-02-18

Country Status (1)

Country Link
DE (1) DE2463178C2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3333753A (en) * 1965-06-17 1967-08-01 Ampex Helical scan magnetic tape apparatus with a squeeze film bearing
DE1933295A1 (en) * 1968-07-03 1970-01-29 Akai Electric Head assembly for a Videomagnetbandgeraet
DE2328948A1 (en) * 1972-06-05 1973-12-20 Matsushita Electric Ind Co Ltd Videobandgeraet

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3333753A (en) * 1965-06-17 1967-08-01 Ampex Helical scan magnetic tape apparatus with a squeeze film bearing
DE1933295A1 (en) * 1968-07-03 1970-01-29 Akai Electric Head assembly for a Videomagnetbandgeraet
DE2328948A1 (en) * 1972-06-05 1973-12-20 Matsushita Electric Ind Co Ltd Videobandgeraet

Also Published As

Publication number Publication date Type
DE2463178C2 (en) 1984-11-08 grant

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Owner name: TELEFUNKEN FERNSEH UND RUNDFUNK GMBH, 3000 HANNOVE

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