JPS5619395A - Dc motor control circuit - Google Patents

Dc motor control circuit

Info

Publication number
JPS5619395A
JPS5619395A JP9157479A JP9157479A JPS5619395A JP S5619395 A JPS5619395 A JP S5619395A JP 9157479 A JP9157479 A JP 9157479A JP 9157479 A JP9157479 A JP 9157479A JP S5619395 A JPS5619395 A JP S5619395A
Authority
JP
Japan
Prior art keywords
voltages
reference voltages
control circuit
motor control
neutral potential
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
JP9157479A
Other languages
Japanese (ja)
Other versions
JPS6159075B2 (en
Inventor
Tadashi Saito
Toshihiko Nakajima
Toshio Osada
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 JP9157479A priority Critical patent/JPS5619395A/en
Priority to US06/169,795 priority patent/US4356437A/en
Publication of JPS5619395A publication Critical patent/JPS5619395A/en
Publication of JPS6159075B2 publication Critical patent/JPS6159075B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/2009—Turntables, hubs and motors for disk drives; Mounting of motors in the drive
    • 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
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/14—Electronic commutators

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

PURPOSE:To remove the affect of an offset of the output voltage and the irregularity of the sensitivity of a magnetic field detector in a DC motor control circuit by limiting the amplifed output voltages of the magnetic field detector within the upper and lower reference voltages wherein two reference voltages vary interlockingly with the neutral potential as a center. CONSTITUTION:The output voltage of the Hall element 30 is amplified by the differential amplifier 48 around the neutral potential VE of the reference voltages VC and VD as a center, is limited at the upper and the lower amplitudes by the diodes 51, 54 to the voltages VC and VD, and applied through power transistors 57, 58 to a stator coil 63. The voltages VC and VD are determined by the base potential vs of a transistor 21. The amplitude of the drive voltage may be altered from the value near the power supply voltage VCC to zero. Further since the neutral potential VE does not alter, the electric powers consumed in the power transistors 57, 59, 61 and 58, 60, 62 are equal.
JP9157479A 1979-07-20 1979-07-20 Dc motor control circuit Granted JPS5619395A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP9157479A JPS5619395A (en) 1979-07-20 1979-07-20 Dc motor control circuit
US06/169,795 US4356437A (en) 1979-07-20 1980-07-17 Control circuit for DC motors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9157479A JPS5619395A (en) 1979-07-20 1979-07-20 Dc motor control circuit

Publications (2)

Publication Number Publication Date
JPS5619395A true JPS5619395A (en) 1981-02-24
JPS6159075B2 JPS6159075B2 (en) 1986-12-15

Family

ID=14030295

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9157479A Granted JPS5619395A (en) 1979-07-20 1979-07-20 Dc motor control circuit

Country Status (1)

Country Link
JP (1) JPS5619395A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4484115A (en) * 1981-07-14 1984-11-20 Fuji Photo Film Co., Ltd. Brushless motor
US4507591A (en) * 1983-07-26 1985-03-26 Rca Corporation Linear pulse width to current converter for brushless DC motors
US4760315A (en) * 1985-09-20 1988-07-26 Sony Corporation Brushless motor drive circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4484115A (en) * 1981-07-14 1984-11-20 Fuji Photo Film Co., Ltd. Brushless motor
US4507591A (en) * 1983-07-26 1985-03-26 Rca Corporation Linear pulse width to current converter for brushless DC motors
US4760315A (en) * 1985-09-20 1988-07-26 Sony Corporation Brushless motor drive circuit

Also Published As

Publication number Publication date
JPS6159075B2 (en) 1986-12-15

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