CA990782A - Speed control for d.c. motors - Google Patents

Speed control for d.c. motors

Info

Publication number
CA990782A
CA990782A CA155,270A CA155270A CA990782A CA 990782 A CA990782 A CA 990782A CA 155270 A CA155270 A CA 155270A CA 990782 A CA990782 A CA 990782A
Authority
CA
Canada
Prior art keywords
motors
speed control
speed
control
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
CA155,270A
Other versions
CA155270S (en
Inventor
Robert H. Brown
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.)
CAV Ltd
Original Assignee
CAV 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 CAV Ltd filed Critical CAV Ltd
Application granted granted Critical
Publication of CA990782A publication Critical patent/CA990782A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/04—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven
    • 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
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
    • H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
    • H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
    • H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
    • H02P7/29—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G2203/00—General characteristics of devices
    • A61G2203/10—General characteristics of devices characterised by specific control means, e.g. for adjustment or steering
    • A61G2203/14—Joysticks
CA155,270A 1971-11-10 1972-10-31 Speed control for d.c. motors Expired CA990782A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5220271A GB1413476A (en) 1971-11-10 1971-11-10 Speed control for dc motors

Publications (1)

Publication Number Publication Date
CA990782A true CA990782A (en) 1976-06-08

Family

ID=10463018

Family Applications (1)

Application Number Title Priority Date Filing Date
CA155,270A Expired CA990782A (en) 1971-11-10 1972-10-31 Speed control for d.c. motors

Country Status (9)

Country Link
US (1) US3854079A (en)
JP (1) JPS529806B2 (en)
CA (1) CA990782A (en)
DE (1) DE2255015C3 (en)
ES (2) ES408658A1 (en)
FR (1) FR2160163A5 (en)
GB (1) GB1413476A (en)
IT (1) IT973432B (en)
ZA (1) ZA727726B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2617883A1 (en) * 1976-04-23 1977-11-10 Bosch Gmbh Robert PULSE CONTROL CIRCUIT FOR ELECTRIC CONSUMERS
US4233549A (en) * 1978-12-08 1980-11-11 Baxter Travenol Laboratories, Inc. Speed and torque control for fractional horsepower motors
US4325011A (en) * 1980-01-31 1982-04-13 Peterson Donovan F Pulse width modulation control circuit
EP0076039A1 (en) * 1981-08-31 1983-04-06 Capax Electrische Apparatenfabriek B.V. Speed control for power tools having a DC motor
US5526460A (en) * 1994-04-25 1996-06-11 Black & Decker Inc. Impact wrench having speed control circuit
GB0128844D0 (en) * 2001-12-01 2002-01-23 Westland Helicopters Power control device
WO2020151006A1 (en) * 2019-01-25 2020-07-30 深圳和而泰智能控制股份有限公司 Rotational speed control device for motor, motor, and food processing apparatus

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1341960A (en) * 1961-12-29 1963-11-02 Philips Nv Astable multivibrator
GB1196244A (en) * 1966-07-26 1970-06-24 Cableform Ltd Improvements relating to Electrically Propelled Invalid Carriages
BE696125A (en) * 1967-03-24 1967-09-24
US3617845A (en) * 1970-04-27 1971-11-02 Applied Motors Inc Energy-conserving control circuit using power transistors
JPS5141248B1 (en) * 1970-12-26 1976-11-09

Also Published As

Publication number Publication date
JPS529806B2 (en) 1977-03-18
DE2255015B2 (en) 1979-01-25
GB1413476A (en) 1975-11-12
JPS4858330A (en) 1973-08-16
FR2160163A5 (en) 1973-06-22
US3854079A (en) 1974-12-10
DE2255015A1 (en) 1973-05-17
ES408658A1 (en) 1976-03-01
ES435937A1 (en) 1976-12-16
ZA727726B (en) 1973-06-27
IT973432B (en) 1974-06-10
DE2255015C3 (en) 1979-09-13

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