JPS5674093A - Brushless dc motor - Google Patents

Brushless dc motor

Info

Publication number
JPS5674093A
JPS5674093A JP15143279A JP15143279A JPS5674093A JP S5674093 A JPS5674093 A JP S5674093A JP 15143279 A JP15143279 A JP 15143279A JP 15143279 A JP15143279 A JP 15143279A JP S5674093 A JPS5674093 A JP S5674093A
Authority
JP
Japan
Prior art keywords
output
oscillator
rotor
brushless
information
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
JP15143279A
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 JP15143279A priority Critical patent/JPS5674093A/en
Publication of JPS5674093A publication Critical patent/JPS5674093A/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 a rotary torque adapted for the brushless DC motor without torque ripple by reading an accurate sine wave information, stored in a memory in synchronism with the magnetic field of a rotor magnet, modulating it into pulse signal and driving the brushless DC motor therewith. CONSTITUTION:Digital information is read from ROMs 21, 31 storing accurate sine wave signal digital information sampled by the repetition number per one revolution of a rotor 1 of the rotor revolving speed corresponding signal FG from a frequency generator 41 and sampling number relating to the magnetic field of the rotor magnet in accordance with the outputs from counters 22, 32 for counting the pulses PFG. The read information is obtained through flip-flops 71S, 71C reset by the output from the oscillator 76 and set by the output of the counter 73 for counting the output of the oscillator 72. The read information is converted into pulse width modulation signals PWS, PWC having repetition frequency of the oscillated output of the oscillator 76, and is thus inputted to the drive circuits 80, 90 through switches 55, 65 switched in synchronism with the magnetic signals ES, EC from Hall elements 51, 61.
JP15143279A 1979-11-22 1979-11-22 Brushless dc motor Pending JPS5674093A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15143279A JPS5674093A (en) 1979-11-22 1979-11-22 Brushless dc motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15143279A JPS5674093A (en) 1979-11-22 1979-11-22 Brushless dc motor

Publications (1)

Publication Number Publication Date
JPS5674093A true JPS5674093A (en) 1981-06-19

Family

ID=15518481

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15143279A Pending JPS5674093A (en) 1979-11-22 1979-11-22 Brushless dc motor

Country Status (1)

Country Link
JP (1) JPS5674093A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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 (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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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