JPS5678386A - Brushless dc motor - Google Patents

Brushless dc motor

Info

Publication number
JPS5678386A
JPS5678386A JP15319079A JP15319079A JPS5678386A JP S5678386 A JPS5678386 A JP S5678386A JP 15319079 A JP15319079 A JP 15319079A JP 15319079 A JP15319079 A JP 15319079A JP S5678386 A JPS5678386 A JP S5678386A
Authority
JP
Japan
Prior art keywords
read
counters
rotor
hall elements
digital 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
JP15319079A
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 JP15319079A priority Critical patent/JPS5678386A/en
Publication of JPS5678386A publication Critical patent/JPS5678386A/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

Abstract

PURPOSE: To reduce a torque ripple by a method wherein digital information of a correct sin-wave signal is kept in memory, the information is read in synchronous with a revolving speed of a rotor and a magnetic field, and a motor is driven.
CONSTITUTION: Digital information sampled by signals of a frequency generator 21 mounted on a rotor are stored in ROM31, 41 and read by counters 32, 42 in synchrous with the field obtained from Hall elements 61, 71 for detecting positions. Then, a pulse width modulating signal is fed to the outputs of flip-flops 81S, 81C, using a variable frequency oscillator 82 and counters 83S, 83C and switch-controlled to excite stator coils 4, 5. Accordingly, torque ripples caused in gain differences of the Hall elements and DC off-set voltage can almost be removed, because a sine- wave without distortion is read to supply currents the stator.
COPYRIGHT: (C)1981,JPO&Japio
JP15319079A 1979-11-26 1979-11-26 Brushless dc motor Pending JPS5678386A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15319079A JPS5678386A (en) 1979-11-26 1979-11-26 Brushless dc motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15319079A JPS5678386A (en) 1979-11-26 1979-11-26 Brushless dc motor

Publications (1)

Publication Number Publication Date
JPS5678386A true JPS5678386A (en) 1981-06-27

Family

ID=15557007

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15319079A Pending JPS5678386A (en) 1979-11-26 1979-11-26 Brushless dc motor

Country Status (1)

Country Link
JP (1) JPS5678386A (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

Similar Documents

Publication Publication Date Title
EP0189675B1 (en) Brushless dc motor
GB1286434A (en) Brushless dynamo electric machines
JPS5674094A (en) Brushless dc motor
SE8307088D0 (en) dc motor
US4384242A (en) Speed control systems of synchronous motors
GB1274483A (en) Self-starting single phase motor
GB1519658A (en) Position control arrangements
JPS5622595A (en) Controller for torque of induction motor
GB1290581A (en)
JPS5678386A (en) Brushless dc motor
GB1354144A (en) Rotating electric machines
GB1389983A (en) Electric synchronous motor
JPS55109188A (en) Brushless dc motor
JPS5671489A (en) Brushless dc motor
JPS55100084A (en) Brushless dc motor
JPS5453204A (en) Frequency generator
JPS648853A (en) Skewed brushless rotary electric machine
GB1180588A (en) Apparatus for Measuring Pulses Produced in Rotary Electric Machines
JPS55100088A (en) Brushless dc motor
JPS57145559A (en) Brushless motor
JPS5757264A (en) Dc generator type contactless speed detector
FR2325237A1 (en) Reversible brushless DC motor - has permanent magnet armature, is variable in speed and may be produced in linear or rotating versions
JPS56162987A (en) Commutatorless dc motor
JPS5674093A (en) Brushless dc motor
KR900007582B1 (en) Brushless motor