GB1060550A – Electrical circuit for controlling the polarity and magnitude of a load current
– Google Patents
GB1060550A – Electrical circuit for controlling the polarity and magnitude of a load current
– Google Patents
Electrical circuit for controlling the polarity and magnitude of a load current
Info
Publication number
GB1060550A
GB1060550A
GB52715/64A
GB5271564A
GB1060550A
GB 1060550 A
GB1060550 A
GB 1060550A
GB 52715/64 A
GB52715/64 A
GB 52715/64A
GB 5271564 A
GB5271564 A
GB 5271564A
GB 1060550 A
GB1060550 A
GB 1060550A
Authority
GB
United Kingdom
Prior art keywords
signal
transistor
reverse
armature
line
Prior art date
1964-01-10
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
GB52715/64A
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.)
General Electric Co
Original Assignee
General Electric 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.)
1964-01-10
Filing date
1964-12-29
Publication date
1967-03-08
1964-12-29
Application filed by General Electric Co
filed
Critical
General Electric Co
1967-03-08
Publication of GB1060550A
publication
Critical
patent/GB1060550A/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
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
H02P7/292—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 static converters, e.g. AC to DC
H02P7/293—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 static converters, e.g. AC to DC using phase control
Abstract
1,060,550. Control of D.C. motors; rectifying. GENERAL ELECTRIC CO. Dec. 29, 1964 [Jan. 10, 1964], No. 52715/64. Headings H2F and H2J. [Also in Division G3] The armature 11 of a shunt – wound motor is supplied through forward or reverse silicon controlled rectifiers 14, 15, associated with pulse transformers having secondary windings 16, 17, and primary windings 18, 19. A currentlimit signal applied to line 32 includes a phaseshifted voltage and a portion of the back E.M.F. signal from armature 11 which also supplies a feedback signal to line 33. Forward and reverse command signals are derived from potentiometer 37 and are combined with phase-shifted signals from circuit 44, 45, the composite signal appearing on line 46. Opposed D.C. bias is added by capacitors 47, 48. When potentiometer 37 is positioned at its mid-point, the composite signal oscillates about zero, and the forward and reverse input waveforms never reach zero. Under these conditions. transistor 55 is conductive and transistor 6 1 is non-conductive so that the rectifiers 14, 15, do not conduct. If it is desired that the armature 11 should oscillate slightly about a zero speed position, potentiometer 51 is adjusted to reduce the bias so providing a small amount of forward and reverse armature current. A forward command signal reduces the conductivity of transistor 41 so that terminal 43 becomes more positive. The reverse signal does not reach zero, but the forward input signal becomes positive at an early point in the positive halfcycle of the source voltage so that transistor 61 conducts and transistor 62 becomes non- conducting. Capacitor 65 charges and sends a pulse through unijunction transistor 63 and primary winding 18 to fire rectifier 14. This action is modified by the current-limit signal on line 32 for determining the average current which can be safely supplied to the armature. As the speed increases, the diode 69 blocks the current-limit signal at an earlier instant in the appropriate half-cycle and permits the forward control circuit to respond to the input signal at that instant. The delay in permitting the forward control circuit to become operative limits the average current passed by the rectifier 14. Reverse operation is similar. The feedback on line 33 opposes the command signal to afford closed loop control.
GB52715/64A
1964-01-10
1964-12-29
Electrical circuit for controlling the polarity and magnitude of a load current
Expired
GB1060550A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US337052A
US3283234A
(en)
1964-01-10
1964-01-10
Control for reversible motor with instantaneous current limit
Publications (1)
Publication Number
Publication Date
GB1060550A
true
GB1060550A
(en)
1967-03-08
Family
ID=23318906
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB52715/64A
Expired
GB1060550A
(en)
1964-01-10
1964-12-29
Electrical circuit for controlling the polarity and magnitude of a load current
Country Status (5)
Country
Link
US
(1)
US3283234A
(en)
JP
(1)
JPS4410489Y1
(en)
DE
(1)
DE1513145B2
(en)
FR
(1)
FR1423158A
(en)
GB
(1)
GB1060550A
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
WO1995001084A1
(en)
*
1993-06-17
1995-01-05
Southpower Limited
Soft switching circuitry
Families Citing this family (9)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3373331A
(en)
*
1965-02-23
1968-03-12
Power Engineering Inc
D.c. motor control circuit
US3465236A
(en)
*
1965-10-15
1969-09-02
Bendix Corp
Timing means including first and second timing networks to selectively gate turn-on devices in opposite senses in response to control pulses
US3414791A
(en)
*
1965-11-26
1968-12-03
Emerson Electric Co
Controlled rectifier dc motor speed control circuit
US3411063A
(en)
*
1965-12-29
1968-11-12
Textron Inc
Control circuit for a direct current motor
CH489141A
(en)
*
1968-02-01
1970-04-15
Heberlein & Co Ag
Circuit arrangement for regulating the speed of an electric motor
DE1763460B1
(en)
*
1968-06-01
1972-05-31
Pfaff Ag G M
DEVICE FOR THE SPEED CONTROL OF AN IN-LINE MOTOR
US3529225A
(en)
*
1968-06-06
1970-09-15
Roberts Machine Rebuilders Inc
Motor speed controls
US3582746A
(en)
*
1969-06-30
1971-06-01
Borg Warner
Motor control system with current limit circuit
US3611098A
(en)
*
1969-10-17
1971-10-05
Sundstrand Corp
Control circuit for dc motor and gatable conduction devices
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3024401A
(en)
*
1960-08-24
1962-03-06
Gen Electric
Motor control circuit
US3095534A
(en)
*
1960-11-22
1963-06-25
Gen Electric
Circuit for controlling energization of a direct current load
US3188542A
(en)
*
1963-01-09
1965-06-08
Gen Precision Inc
Electric position servomechanism
1964
1964-01-10
US
US337052A
patent/US3283234A/en
not_active
Expired – Lifetime
1964-12-29
GB
GB52715/64A
patent/GB1060550A/en
not_active
Expired
1965
1965-01-08
FR
FR1233A
patent/FR1423158A/en
not_active
Expired
1965-01-09
DE
DE19651513145
patent/DE1513145B2/en
not_active
Ceased
1967
1967-10-11
JP
JP1967086203U
patent/JPS4410489Y1/ja
not_active
Expired
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
WO1995001084A1
(en)
*
1993-06-17
1995-01-05
Southpower Limited
Soft switching circuitry
AU673612B2
(en)
*
1993-06-17
1996-11-14
Southpower Limited
Soft switching circuitry
Also Published As
Publication number
Publication date
US3283234A
(en)
1966-11-01
DE1513145B2
(en)
1972-03-30
DE1513145A1
(en)
1969-06-12
FR1423158A
(en)
1966-01-03
JPS4410489Y1
(en)
1969-04-28
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None