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

Speed control for d.c. motors

Info

Publication number: CA990782A
Authority: CA; Canada
Prior art keywords: motors; speed control; speed; control
Prior art date: 1971-11-10
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.)

1971-11-10

Filing date

1972-10-31

Publication date

1976-06-08

1972-10-31 Application filed by CAV Ltd filed Critical CAV Ltd

1976-06-08 Application granted granted Critical

1976-06-08 Publication of CA990782A publication Critical patent/CA990782A/en

Status Expired legal-status Critical Current

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

Landscapes

Health & Medical Sciences (AREA)
Life Sciences & Earth Sciences (AREA)
Animal Behavior & Ethology (AREA)
General Health & Medical Sciences (AREA)
Public Health (AREA)
Veterinary Medicine (AREA)
Engineering & Computer Science (AREA)
Power Engineering (AREA)
Control Of Direct Current Motors (AREA)
Continuous-Control Power Sources That Use Transistors (AREA)
Control Of Multiple Motors (AREA)

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
US11050368B2 (en) *	2019-01-25	2021-06-29	Shenzhen H&T Intelligent Control Co., Ltd.	Apparatus for controlling rotation speed of motor, motor and food processing equipment

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

1971
- 1971-11-10 GB GB5220271A patent/GB1413476A/en not_active Expired
1972
- 1972-10-31 CA CA155,270A patent/CA990782A/en not_active Expired
- 1972-10-31 ZA ZA727726A patent/ZA727726B/en unknown
- 1972-11-08 IT IT53870/72A patent/IT973432B/en active
- 1972-11-08 ES ES408658A patent/ES408658A1/en not_active Expired
- 1972-11-10 US US00305507A patent/US3854079A/en not_active Expired - Lifetime
- 1972-11-10 FR FR7239887A patent/FR2160163A5/fr not_active Expired
- 1972-11-10 JP JP47112193A patent/JPS529806B2/ja not_active Expired
- 1972-11-10 DE DE2255015A patent/DE2255015C3/en not_active Expired
1975
- 1975-03-24 ES ES435937A patent/ES435937A1/en not_active Expired

Also Published As

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

Publication	Publication Date	Title
AU468349B2 (en)	1976-01-08	Drive system
CA1001223A (en)	1976-12-07	Digital speed control
AU461149B2 (en)	1975-05-15	Induction motor speed control
CA939433A (en)	1974-01-01	Speed control system
CA993556A (en)	1976-07-20	Speed control system
AU458507B2 (en)	1975-02-05	Speed governor
CA945475A (en)	1974-04-16	Control system for high speed printer
CA990782A (en)	1976-06-08	Speed control for d.c. motors
HK75576A (en)	1976-12-10	Ward leonard speed control systems for d.c. motors
AU468330B2 (en)	1976-01-08	Control system for adjusting speed ofa. c. motor
CA1002111A (en)	1976-12-21	Motor speed control
CA944428A (en)	1974-03-26	Motor control system
CA950775A (en)	1974-07-09	Automatic speed control
CA888366A (en)	1971-12-14	Motor speed control
CA941891A (en)	1974-02-12	D.c. motor control circuit
CA939622A (en)	1974-01-08	Speed control device
CA957014A (en)	1974-10-29	Induction motor speed control
CA881755A (en)	1971-09-21	Linear motor speed control system
CA877524A (en)	1971-08-03	Motor control
CA940195A (en)	1974-01-15	Motor speed control
CA875905A (en)	1971-07-20	Control system for dual motors
CA943625A (en)	1974-03-12	Speed control for electric motors
CA881089A (en)	1971-09-14	Motor control system
CA879291A (en)	1971-08-24	Motor control system
CA878102A (en)	1971-08-10	Motor control system