GB1041578A – Electric current sensing-time limit acceleration device
– Google Patents
GB1041578A – Electric current sensing-time limit acceleration device
– Google Patents
Electric current sensing-time limit acceleration device
Info
Publication number
GB1041578A
GB1041578A
GB47880/63A
GB4788063A
GB1041578A
GB 1041578 A
GB1041578 A
GB 1041578A
GB 47880/63 A
GB47880/63 A
GB 47880/63A
GB 4788063 A
GB4788063 A
GB 4788063A
GB 1041578 A
GB1041578 A
GB 1041578A
Authority
GB
United Kingdom
Prior art keywords
current
circuit
resistors
motor
series
Prior art date
1963-02-12
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
GB47880/63A
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.)
Schneider Electric USA Inc
Original Assignee
Square D Co
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.)
1963-02-12
Filing date
1963-12-04
Publication date
1966-09-07
1963-12-04
Application filed by Square D Co
filed
Critical
Square D Co
1966-09-07
Publication of GB1041578A
publication
Critical
patent/GB1041578A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
H02P1/18—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual dc motor
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10S388/00—Electricity: motor control systems
Y10S388/90—Specific system operational feature
Y10S388/903—Protective, e.g. voltage or current limit
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10S388/00—Electricity: motor control systems
Y10S388/907—Specific control circuit element or device
Y10S388/913—Saturable reactor, space discharge device, or magnetic amplifier
Abstract
1,041,578. Control of D.C. motors. SQUARE D. CO. Dec. 4, 1963 [Feb. 12, 1963], No. 47880/63. Heading H2J. A circuit to shunt one of a series of motorstarting resistors on reduction of armature current or effluxion of time comprises a shunt 23 carrying the armature current connected to a saturable transformer primary winding 20. When the motor is first switched on, the voltage induced in the secondary winding 205 causes a transistor 22 to conduct, energizing a relay 31, 31w controlling a contactor shunting one of the motor-starting resistors, the contacts 31 opening before the contactor closes. When the armature current falls, the transistor blocks and the relay releases closing contacts 31. If the current does not fall, after a time delay, the transformer saturates and the transistor again blocks. A resistor 21 provides a reverse current through the transformer to reset the flux. As the circuit is polarity sensitive, two such circuits connected in reverse series must be provided to operate on bi-directional current. A circuit is described in the Specification for successively shunting two series motor resistors.
GB47880/63A
1963-02-12
1963-12-04
Electric current sensing-time limit acceleration device
Expired
GB1041578A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US258011A
US3250944A
(en)
1963-02-12
1963-02-12
Electric current-sensing time limit motor acceleration system
Publications (1)
Publication Number
Publication Date
GB1041578A
true
GB1041578A
(en)
1966-09-07
Family
ID=22978717
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB47880/63A
Expired
GB1041578A
(en)
1963-02-12
1963-12-04
Electric current sensing-time limit acceleration device
Country Status (2)
Country
Link
US
(1)
US3250944A
(en)
GB
(1)
GB1041578A
(en)
Families Citing this family (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
NL285831A
(en)
*
1961-11-27
1900-01-01
US3341759A
(en)
*
1963-12-05
1967-09-12
Tokyo Shibaura Electric Co
Control device for electric cars including scr short circuiting of a starting resistance
ZA711157B
(en)
*
1970-03-04
1971-11-24
Joy Mfg Co
Ac-dc traction drive control system
Family Cites Families (7)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US1805491A
(en)
*
1928-05-26
1931-05-19
Cutler Hammer Inc
Motor controller
US2649557A
(en)
*
1950-01-28
1953-08-18
Int Standard Electric Corp
Electric potential comparing circuit
GB864755A
(en)
*
1956-09-13
1961-04-06
Ass Elect Ind
Improvements in and relating to control systems for electric motors
US2921241A
(en)
*
1957-06-07
1960-01-12
William E Mcfarland
Current actuated sensing apparatus
US2957111A
(en)
*
1957-12-11
1960-10-18
Barber Colman Co
Condition responsive control apparatus
US3018416A
(en)
*
1959-02-19
1962-01-23
Westinghouse Electric Corp
Static overcurrent trip device
US3177402A
(en)
*
1962-05-25
1965-04-06
Raytheon Co
Over-current protective circuits
1963
1963-02-12
US
US258011A
patent/US3250944A/en
not_active
Expired – Lifetime
1963-12-04
GB
GB47880/63A
patent/GB1041578A/en
not_active
Expired
Also Published As
Publication number
Publication date
US3250944A
(en)
1966-05-10
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None