ES410813A1 - Externally-excited DC motor speed control for crane - prevents armature circuit overload when motor runs above basic speed (RU 14.9.76) - Google Patents

Externally-excited DC motor speed control for crane - prevents armature circuit overload when motor runs above basic speed (RU 14.9.76)

Info

Publication number
ES410813A1
ES410813A1 ES410813A ES410813A ES410813A1 ES 410813 A1 ES410813 A1 ES 410813A1 ES 410813 A ES410813 A ES 410813A ES 410813 A ES410813 A ES 410813A ES 410813 A1 ES410813 A1 ES 410813A1
Authority
ES
Spain
Prior art keywords
motor
crane
excited
externally
speed
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
ES410813A
Other languages
Spanish (es)
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
Allmanna Svenska Elektriska AB
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 ASEA AB, Allmanna Svenska Elektriska AB filed Critical ASEA AB
Publication of ES410813A1 publication Critical patent/ES410813A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements
    • 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
    • H02P7/298—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 and field supplies
    • H02P7/2985—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 and field supplies whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Direct Current Motors (AREA)
  • Control And Safety Of Cranes (AREA)

Abstract

The speed control is applied to an externally-excited DC motor for a crane. It releases a signal when a limit is exceeded when the motor is running at speeds above its basic speed and thereby prevents the armature circuit from being overloaded. This signal prevents the speed increasing further. When the load, on the crane is being lowered and the motor is driven by the load, the reference generator's (11) acceleration signal is interrupted at a lower armature current than the preset value. When the load is being raised this interruption takes place at a higher armature current.
ES410813A 1972-01-25 1973-01-19 Externally-excited DC motor speed control for crane - prevents armature circuit overload when motor runs above basic speed (RU 14.9.76) Expired ES410813A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE81472A SE360059B (en) 1972-01-25 1972-01-25

Publications (1)

Publication Number Publication Date
ES410813A1 true ES410813A1 (en) 1975-12-16

Family

ID=20257145

Family Applications (1)

Application Number Title Priority Date Filing Date
ES410813A Expired ES410813A1 (en) 1972-01-25 1973-01-19 Externally-excited DC motor speed control for crane - prevents armature circuit overload when motor runs above basic speed (RU 14.9.76)

Country Status (4)

Country Link
DE (1) DE2301935B2 (en)
ES (1) ES410813A1 (en)
RO (1) RO61026A (en)
SE (1) SE360059B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI875074A (en) * 1986-12-04 1988-06-05 Kontron Holding Ag STYRNING AV EN MOTOR.
DE4115295A1 (en) * 1991-05-10 1992-11-12 Telefunken Electronic Gmbh Load current monitoring circuit with overload and short-circuit protection - uses current-voltage converter supplying overload and short-circuit detectors

Also Published As

Publication number Publication date
DE2301935B2 (en) 1978-06-22
AU5131873A (en) 1974-07-25
SE360059B (en) 1973-09-17
DE2301935A1 (en) 1973-08-02
RO61026A (en) 1976-09-15

Similar Documents

Publication Publication Date Title
JPS5220210A (en) Control means for d-c motor
GB1078221A (en) Improvements in or relating to speed controlled electronic switching devices
ES410813A1 (en) Externally-excited DC motor speed control for crane - prevents armature circuit overload when motor runs above basic speed (RU 14.9.76)
JPS5313084A (en) Drive signal generating circuit
BE749929A (en) FOOT CONTROL DEVICE, WITH VARIABLE RESISTANCE, FOR ADJUSTING THE SPEED OF AN ELECTRIC MOTOR
JPS5336810A (en) System for stoppistopping vehicle at predetermined position under electric power control
GB1450078A (en) Method of and a device for reducing the influence of backlash in the drive of a machine tool
JPS51124218A (en) Control device for electric car
GB962158A (en) Control of elevator motors
JPS5330559A (en) Elevator speed control device
JPS5419111A (en) Controlling motor with shunt field winding
SU770980A1 (en) Mine lifting machine optimal control system
GB1198199A (en) Braking Equipment for Hoisting Gear Electric Motors
GB1357891A (en) Electric motor control apparatus
JPS53123830A (en) Control system by current type inverter driver induction motors
JPS5340815A (en) Alternating current variable speed motor device
JPS5216617A (en) Apparatus for controlling commutatorless motors
JPS5388123A (en) Control system for induction motor
JPS5298922A (en) Controlling device of dc motor
JPS51143215A (en) Automatic speed change control for electric automobile
JPS53546A (en) Control system for dc elevator
JPS53107013A (en) Device for controlling electric motor vehicle
JPS51122741A (en) Motor overload control device
GB1319684A (en) Hoists
JPS5259445A (en) Control system for a.c. elevator