GB1449058A - Speed-controlled brushless motors - Google Patents

Speed-controlled brushless motors

Info

Publication number
GB1449058A
GB1449058A GB3886773A GB3886773A GB1449058A GB 1449058 A GB1449058 A GB 1449058A GB 3886773 A GB3886773 A GB 3886773A GB 3886773 A GB3886773 A GB 3886773A GB 1449058 A GB1449058 A GB 1449058A
Authority
GB
United Kingdom
Prior art keywords
speed
motor
control
comparator
braking
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
GB3886773A
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.)
Canon Inc
Canon Precision Inc
Original Assignee
Canon Inc
Canon Precision Inc
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 Canon Inc, Canon Precision Inc filed Critical Canon Inc
Publication of GB1449058A publication Critical patent/GB1449058A/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
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/12—Monitoring commutation; Providing indication of commutation failure

Landscapes

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

Abstract

1449058 Automatic control of speed CANON KK and CANON SEIKI KK 16 Aug 1973 [16 Aug 1972] 38867/73 Heading G3R [Also in Division H2] In a rectroactive speed control system for a brushless D.C. motor, wherein the speed of the motor is detected by Hall generators which produce pulses the frequency of which represents the motor speed, a voltage representative of this frequency being compared with a reference signal, any difference being used to vary the gain of a control circuit for the motor drive. As shown, the outputs of the Hall generators H 1 H 2 pass via a converter 5 to comparator 6 where they are compared with a fixed speed referance as determined by potentiometer R14 and Zener diode ZD1. The comparator output via amplifier 6' is used to control, in accordance with the output, the gain of amplifiers A 1 to A 4 , which amplify the Hall generator outputs to sequentially energize the motor stator windings L1-L4. The system may also include means to apply braking current to the stator windings, if the detected speed is in excess of the reference speed by more than a predetermined amount. Thus, the output from the comparator may be switched to amplifiers A 1 to A 4 , to braking control tranistors (Tr 21 to Tr 24 or to both, Fig. 6 (not shown). Braking is caused by reverse current flow through the stator winding.
GB3886773A 1972-08-16 1973-08-16 Speed-controlled brushless motors Expired GB1449058A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47082001A JPS4938110A (en) 1972-08-16 1972-08-16

Publications (1)

Publication Number Publication Date
GB1449058A true GB1449058A (en) 1976-09-08

Family

ID=13762246

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3886773A Expired GB1449058A (en) 1972-08-16 1973-08-16 Speed-controlled brushless motors

Country Status (3)

Country Link
JP (1) JPS4938110A (en)
DE (1) DE2340984B2 (en)
GB (1) GB1449058A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2744089A1 (en) * 1976-11-19 1978-06-01 Sony Corp MOTOR CONTROL CIRCUIT
GB2181003A (en) * 1985-09-20 1987-04-08 Sanyo Electric Co Control systems for brushless motors
DE4331742A1 (en) * 1993-09-20 1995-03-23 Thomson Brandt Gmbh Controlling circuit using a number of sensors

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2616044A1 (en) * 1972-05-25 1977-10-20 Papst Motoren Kg Commutatorless DC motor with permanent magnet rotor - has winding voltage converted into pulses phase shifted and used after smoothing for motor control
DE2747036A1 (en) * 1977-10-19 1979-04-26 Papst Motoren Kg Speed controlled commutatorless DC motor - uses electrically operating braking unit to retard motor when nominal motor speed is exceeded by small amount
GB2039095B (en) * 1978-12-07 1982-11-24 Hansen J S Electric motors speed regulation
JPS58131571A (en) * 1982-01-14 1983-08-05 Victor Co Of Japan Ltd Detection of speed of hall motor
JPS59108016A (en) * 1982-12-10 1984-06-22 Dainippon Ink & Chem Inc Preparation of impact-resistant resin having excellent surface characteristic
US4777210A (en) * 1986-07-25 1988-10-11 Cosden Technology, Inc. Continuous production of high impact polystyrene

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2744089A1 (en) * 1976-11-19 1978-06-01 Sony Corp MOTOR CONTROL CIRCUIT
GB2181003A (en) * 1985-09-20 1987-04-08 Sanyo Electric Co Control systems for brushless motors
US4748386A (en) * 1985-09-20 1988-05-31 Sanyo Electric Co., Ltd. Controller of brushless DC motor
GB2181003B (en) * 1985-09-20 1990-01-24 Sanyo Electric Co Controller of dc brushless motor
DE4331742A1 (en) * 1993-09-20 1995-03-23 Thomson Brandt Gmbh Controlling circuit using a number of sensors

Also Published As

Publication number Publication date
DE2340984B2 (en) 1978-12-14
DE2340984A1 (en) 1974-02-28
JPS4938110A (en) 1974-04-09

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19930815