GB1057885A - Apparatus for stopping a rotatable shaft at a predetermined angular position - Google Patents
Apparatus for stopping a rotatable shaft at a predetermined angular positionInfo
- Publication number
- GB1057885A GB1057885A GB2967662A GB2967662A GB1057885A GB 1057885 A GB1057885 A GB 1057885A GB 2967662 A GB2967662 A GB 2967662A GB 2967662 A GB2967662 A GB 2967662A GB 1057885 A GB1057885 A GB 1057885A
- Authority
- GB
- United Kingdom
- Prior art keywords
- winding
- transformer
- speed
- coil
- rectifier
- 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
Links
- 238000004804 winding Methods 0.000 abstract 10
- 238000010304 firing Methods 0.000 abstract 1
- 230000006698 induction Effects 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/14—Control arrangements for mechanically-driven presses
- B30B15/144—Control arrangements for mechanically-driven presses for stopping the press shaft in a predetermined angular position
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
- B23Q15/20—Automatic control or regulation of feed movement, cutting velocity or position of tool or work before or after the tool acts upon the workpiece
- B23Q15/22—Control or regulation of position of tool or workpiece
- B23Q15/26—Control or regulation of position of tool or workpiece of angular position
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Stopping Of Electric Motors (AREA)
Abstract
1,057,885. Control of A.C. motors. ALFRED HERBERT Ltd. July 30, 1963 [Aug. 2, 1962], No.29676/62. Heading H2J. [Also in Division G3] An induction motor 31 has its speed reduced before stopping by an opening contactor 102 and closing contactor 103. As shaft 20 rotates at a low speed, coil 24 is coupled with coil 23 through gap 21 in disc 18, so actuating bistable circuit 27 which prepares gate 28 to stop the motor when coil 25 is coupled to coil 23 through gap 22 in disc 19. In this manner, the shaft 20 is stopped finally in a desired angular position. The voltage applied across each stator phase winding is reduced to provide operation at the creep speed, a phase winding being supplied from a bridge rectifier 40 associated with controlled rectifier 41 whose firing angle is varied by a signal derived from transformer 42. The primary winding of the transformer 42 is connected to trigger circuit 43, the rectifier 40 being connected to three-phase transformer 49. The trigger circuit 43 is connected to transformer winding 52 through lines 55, to the transformer 42 through terminals 66, and to transformer winding 77 through lines 76, the maximum duration of the pulse from the trigger circuit being determined by resistor 65 associated with transistor 63. According to Fig. 3 (not shown) a variable resistor (64) determines the minimum duration of the pulse and the angle of conduction of rectifier 41. The voltage applied to transistor (63) by variable resistor (61) is opposed by a rectified voltage from winding 77 proportional to the speed of the motor, the magnitude of the power pulses applied to the stator winding 32 being reduced in accordance with the speed feed-back signal. A speed control circuit 87 comprises a tachometer generator having an input winding which is energized with alternating-current, and an output winding applying signal through a transistor amplifier to the primary winding of the transformer 78.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2967662A GB1057885A (en) | 1962-08-02 | 1962-08-02 | Apparatus for stopping a rotatable shaft at a predetermined angular position |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2967662A GB1057885A (en) | 1962-08-02 | 1962-08-02 | Apparatus for stopping a rotatable shaft at a predetermined angular position |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1057885A true GB1057885A (en) | 1967-02-08 |
Family
ID=10295329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2967662A Expired GB1057885A (en) | 1962-08-02 | 1962-08-02 | Apparatus for stopping a rotatable shaft at a predetermined angular position |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1057885A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0405645A3 (en) * | 1989-06-29 | 1991-04-24 | Station Oenotechnique De Champagne | System for measuring and controlling the angular position of the vessel of membrane presses in general |
-
1962
- 1962-08-02 GB GB2967662A patent/GB1057885A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0405645A3 (en) * | 1989-06-29 | 1991-04-24 | Station Oenotechnique De Champagne | System for measuring and controlling the angular position of the vessel of membrane presses in general |
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