JPS5671489A - Brushless dc motor - Google Patents

Brushless dc motor

Info

Publication number
JPS5671489A
JPS5671489A JP14809279A JP14809279A JPS5671489A JP S5671489 A JPS5671489 A JP S5671489A JP 14809279 A JP14809279 A JP 14809279A JP 14809279 A JP14809279 A JP 14809279A JP S5671489 A JPS5671489 A JP S5671489A
Authority
JP
Japan
Prior art keywords
magnetic field
rotor
pwc
synchronism
sine wave
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
JP14809279A
Other languages
Japanese (ja)
Inventor
Hiroyuki Yamauchi
Tamotsu Yamagami
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
Priority to JP14809279A priority Critical patent/JPS5671489A/en
Publication of JPS5671489A publication Critical patent/JPS5671489A/en
Pending 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
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/10—Arrangements for controlling torque ripple, e.g. providing reduced torque ripple

Landscapes

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

Abstract

PURPOSE:To obtain rotary torque having no torque ripple by reading the accurate sine wave information stored in a memory in synchronism with the magnetic field from a rotor magnet and digitally processing it and driving the brushless DC motor. CONSTITUTION:Digital information is read from ROM31, 41 storing accurate sine wave signal digital information sampled at the number of samplings relative to the magnetic field of the rotor magnet and the repetition number per revolution of the rotor of a rotor revolution speed corresponding signal FG from a frequency generator 51 in accordance with the outputs from counters 32, 42 for counting the pulses PFG. The read information through an oscillator 82 servo controlled by a signal FG, a counter 83, digital comparators 84S, 84C, inhibit gates 85S, 85C and flip-flops 81S, 81C is converted into pulse width modulation signals PWS, PWC, and the signals PWS, PWC are inputted through switching circuits 66, 76 in synchronism with the magnetic field signals ES, EC from the hall elements 61, 71 into driving circuits 100, 110 respectively.
JP14809279A 1979-11-15 1979-11-15 Brushless dc motor Pending JPS5671489A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14809279A JPS5671489A (en) 1979-11-15 1979-11-15 Brushless dc motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14809279A JPS5671489A (en) 1979-11-15 1979-11-15 Brushless dc motor

Publications (1)

Publication Number Publication Date
JPS5671489A true JPS5671489A (en) 1981-06-15

Family

ID=15445053

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14809279A Pending JPS5671489A (en) 1979-11-15 1979-11-15 Brushless dc motor

Country Status (1)

Country Link
JP (1) JPS5671489A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4525657A (en) * 1983-03-09 1985-06-25 Matsushita Electric Industrial Co., Ltd. Torque ripple compensation circuit for a brushless D.C. motor
US4651068A (en) * 1984-10-01 1987-03-17 Electro-Craft Corporation Brushless motor control circuitry with optimum current vector control
US4739231A (en) * 1983-06-16 1988-04-19 Canon Kabushiki Kaisha Image forming system
JPS63107482A (en) * 1986-10-21 1988-05-12 Fanuc Ltd Current controller for ac motor
WO2013058920A2 (en) * 2011-10-21 2013-04-25 Allegro Microsystems, Inc. Motor control circuit and method that reduce speed jitter of an electric motor

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4525657A (en) * 1983-03-09 1985-06-25 Matsushita Electric Industrial Co., Ltd. Torque ripple compensation circuit for a brushless D.C. motor
US4739231A (en) * 1983-06-16 1988-04-19 Canon Kabushiki Kaisha Image forming system
US4651068A (en) * 1984-10-01 1987-03-17 Electro-Craft Corporation Brushless motor control circuitry with optimum current vector control
JPS63107482A (en) * 1986-10-21 1988-05-12 Fanuc Ltd Current controller for ac motor
WO2013058920A2 (en) * 2011-10-21 2013-04-25 Allegro Microsystems, Inc. Motor control circuit and method that reduce speed jitter of an electric motor
WO2013058920A3 (en) * 2011-10-21 2014-03-13 Allegro Microsystems, Llc Motor control circuit and method that reduce speed jitter of an electric motor
US8742713B2 (en) 2011-10-21 2014-06-03 Allegro Microsystems, Llc Motor control circuit and method that reduce speed jitter of an electric motor
TWI487266B (en) * 2011-10-21 2015-06-01 Allegro Microsystems Llc Circuit and method for driving a multi-phase brushless dc motor

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