GB1005058A - Motor speed control apparatus - Google Patents

Motor speed control apparatus

Info

Publication number
GB1005058A
GB1005058A GB538/64A GB53864A GB1005058A GB 1005058 A GB1005058 A GB 1005058A GB 538/64 A GB538/64 A GB 538/64A GB 53864 A GB53864 A GB 53864A GB 1005058 A GB1005058 A GB 1005058A
Authority
GB
United Kingdom
Prior art keywords
line
speed
stands
voltage
strip
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
GB538/64A
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB1005058A publication Critical patent/GB1005058A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/46—Roll speed or drive motor control
    • 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
    • H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/46—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another
    • H02P5/50—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another by comparing electrical values representing the speeds
    • H02P5/51—Direct ratio control

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Multiple Motors (AREA)
  • Control Of Metal Rolling (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

1,005,058. Control of several D.C. motors. WESTINGHOUSE ELECTRIC CORPORATION. Jan. 6, 1964 [Jan. 31, 1963], No. 538/64. Heading H2J. The finishing train for a hot strip rolling mill comprises stands 10-20 and strip winder 24, each of the stands being provided with screwdown mechanism 26 and drive motor 28 associated with generator 30 having speed regulator 32 for field winding 34. Thread-voltage line 40 is energized by exciter 44, whilst run-voltage line 42 is supplied from both the exciters 44, 48. The speed regulator 32 comprises voltagesensing resistor 50 which is connectable to either of the lines 40 or 42. Roll-force sensing devices 62 indicate the passage of work-piece 60 through each of the stands, and are connected to sequence controller 64 for operating contactors 52, 58. Winder 24 is driven by motor 70 having load senser 72, ramp signal generators 80, 84, being provided for exciters 44, 48. Initially, the stands operate at thread speed, the voltage of line 40 increasing linearly. When the strip has passed through each of the stands, and enters the winder, the device 72 responds to provide a signal to controller 64 whereby line 42 becomes effective, and line 40 is disconnected after a time delay. Only when the output voltage of the exciter 48 is zero, can the contactor 58 be closed. Thereafter, the voltage of the exciter is increased linearly until a maximum running speed is reached. Each device 62 provides a signal to the sequence control 64 which causes the operating speed of each stand to decrease from the running-speed back to the thread-speed when the strip has passed through the stand. The increased load taken by the motor 70 is detected when the strip enters the winder whereby the motor is supplied with increased voltage due to the line 42 becoming effective and the line 40 ineffective.
GB538/64A 1963-01-31 1964-01-06 Motor speed control apparatus Expired GB1005058A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US255260A US3213656A (en) 1963-01-31 1963-01-31 Rolling mill motor speed control apparatus

Publications (1)

Publication Number Publication Date
GB1005058A true GB1005058A (en) 1965-09-22

Family

ID=22967540

Family Applications (1)

Application Number Title Priority Date Filing Date
GB538/64A Expired GB1005058A (en) 1963-01-31 1964-01-06 Motor speed control apparatus

Country Status (3)

Country Link
US (1) US3213656A (en)
JP (1) JPS4220487Y1 (en)
GB (1) GB1005058A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3338079A (en) * 1963-05-10 1967-08-29 Westinghouse Electric Corp Motor speed control apparatus for runout tables
US3363441A (en) * 1965-09-28 1968-01-16 Westinghouse Electric Corp Speed control system for edger and other rolls in a reduction rolling mill
US3418834A (en) * 1965-10-21 1968-12-31 Westinghouse Electric Corp Temperature control system and method for operating a reduction rolling mill
JPS50139270A (en) * 1974-04-23 1975-11-07
JPS623820A (en) * 1985-02-25 1987-01-09 Nippon Steel Corp Continuous rolling equipment for steel sheet

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2342767A (en) * 1942-02-21 1944-02-29 Westinghouse Electric & Mfg Co Control system
US3109330A (en) * 1960-08-24 1963-11-05 Jones & Laughlin Steel Corp Continuous mill control means

Also Published As

Publication number Publication date
US3213656A (en) 1965-10-26
JPS4220487Y1 (en) 1967-11-29

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