GB1263157A - Speed control system - Google Patents

Speed control system

Info

Publication number
GB1263157A
GB1263157A GB24365/69A GB2436569A GB1263157A GB 1263157 A GB1263157 A GB 1263157A GB 24365/69 A GB24365/69 A GB 24365/69A GB 2436569 A GB2436569 A GB 2436569A GB 1263157 A GB1263157 A GB 1263157A
Authority
GB
United Kingdom
Prior art keywords
speed
sawtooth
capstan
motor
voltage
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
GB24365/69A
Inventor
Jun Takayama
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Publication of GB1263157A publication Critical patent/GB1263157A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
    • H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
    • H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
    • H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
    • H02P7/288—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using variable impedance
    • H02P7/2885—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using variable impedance whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S388/00—Electricity: motor control systems
    • Y10S388/907—Specific control circuit element or device
    • Y10S388/915—Sawtooth or ramp waveform generator

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Direct Current Motors (AREA)
  • Control Of Velocity Or Acceleration (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

1,263,157. Automatic speed control. SONY CORP. May 13, 1969 [May 13, 1968], No.24365/69. Heading G3R. In a speed control system, e. g. for the capstan of a tape recorder, a signal is generated whose frequency is proportional to the speed and this is converted to a sawtooth wave-form which is used to drive the capstan, means being provided to adjust the slope of the sawtooth so as to set the desired speed. The alternating output of a tachometer generator 1, coupled to the capstan motor M, is squared by an over-driven amplifier Tr 1 and differentiated by C 1 -R 1 the positive (or negative) going pulses rendering a transistor Tr 2 conducting to discharge a capacitor C 4 . Between pulses C 4 charges at a rate dependant upon the value of a speed setting resistance selected by a switch S. The sawtooth voltage across C 4 thus has a period and therefore a peak amplitude dependent on the speed of the motor. The amplitude of the sawtooth is compared first with a voltage E set by a rheostat R 2 and then with the Zener voltage of a diode Z D and when the amplitude exceeds a set value a transistor Tr 7 is rendered conducting. The voltage at the collector of Tr 7 , which is thus a rectangular wave-form whose pulse width varies with the speed of the motor, is integrated by R 5 -C 2 and the resulting fluctuating D. C. is amplified and used to supply the motor M. The linearity of the sawtooth wave-form is improved by positive feedback using a transistor Tr 3 and capacitor C 3 ; these are omitted from a simplified form of the circuit Fig. 3 (not shown) along with other inessential parts. It is stated that the invention may be applied to controlling a brake acting upon the capstan instead.
GB24365/69A 1968-05-13 1969-05-13 Speed control system Expired GB1263157A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1968039190U JPS5028330Y1 (en) 1968-05-13 1968-05-13

Publications (1)

Publication Number Publication Date
GB1263157A true GB1263157A (en) 1972-02-09

Family

ID=12546178

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24365/69A Expired GB1263157A (en) 1968-05-13 1969-05-13 Speed control system

Country Status (6)

Country Link
US (1) US3596162A (en)
JP (1) JPS5028330Y1 (en)
CH (1) CH508238A (en)
DE (1) DE1924233C3 (en)
GB (1) GB1263157A (en)
NL (1) NL163915C (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5235106B2 (en) * 1972-05-25 1977-09-07
US3835357A (en) * 1972-12-29 1974-09-10 W Holzer Method and apparatus for speed regulation of alternating current motors
JPS538888B2 (en) * 1973-09-10 1978-04-01
US4011491A (en) * 1974-03-19 1977-03-08 Heath Company Motor speed control circuit
US4150324A (en) * 1976-05-19 1979-04-17 Hitachi, Ltd. Speed control system of traction motor for electric vehicles
DE2626704A1 (en) * 1976-06-15 1977-12-22 Klaus Kraemer Self adhesive postage stamps - are produced with self adhesive backing with easily removed protective foil lifted from uncoated region
US4155033A (en) * 1977-06-16 1979-05-15 Triple I, Incorporated Synchronous capstan drive system
US4456859A (en) * 1978-04-12 1984-06-26 Janome Sewing Machine Co. Ltd. Sewing machine drive motor control system
US4236102A (en) * 1978-07-25 1980-11-25 Gerhard Biedenkapp Control system for spool drive of magnetic tape apparatus
US4218641A (en) * 1978-11-16 1980-08-19 International Business Machines Corporation Analog DC motor velocity control loop
US4280082A (en) * 1979-04-23 1981-07-21 Ncr Corporation Digital DC motor speed control circuit
JPS56133998A (en) * 1980-03-22 1981-10-20 Sharp Corp Speed control circuit for motor
US4326153A (en) * 1980-07-11 1982-04-20 Sunbeam Corporation Feedback motor control circuit
EP0104029B1 (en) * 1982-09-17 1988-08-24 Kudelski S.A. Control system for an electric motor
US4598239A (en) * 1983-12-28 1986-07-01 Papst-Motoren Gmbh & Co. Kg Circuit for regulating the rpm and phase of a motor
US5225749A (en) * 1990-09-26 1993-07-06 Mitsubishi Denki Kabushiki Kaisha System for controlling the rotational speed of a rotary member
US5273602A (en) * 1990-12-19 1993-12-28 Hercules Incorporated Ribbonizing method for selectively heating a respective one of a plurality of fiber tows
GB2256066B (en) * 1991-05-07 1994-11-09 Matsushita Electric Ind Co Ltd Rotational speed control apparatus for DC motor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3234447A (en) * 1962-11-06 1966-02-08 El Tronics Inc Motor speed control circuit

Also Published As

Publication number Publication date
DE1924233C3 (en) 1981-12-24
NL163915B (en) 1980-05-16
NL6907330A (en) 1969-11-17
DE1924233B2 (en) 1977-03-31
DE1924233A1 (en) 1970-08-27
US3596162A (en) 1971-07-27
JPS5028330Y1 (en) 1975-08-21
NL163915C (en) 1980-10-15
CH508238A (en) 1971-05-31

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