SE317217B - - Google Patents
Info
- Publication number
- SE317217B SE317217B SE1789266A SE1789266A SE317217B SE 317217 B SE317217 B SE 317217B SE 1789266 A SE1789266 A SE 1789266A SE 1789266 A SE1789266 A SE 1789266A SE 317217 B SE317217 B SE 317217B
- Authority
- SE
- Sweden
- Prior art keywords
- frequency
- slip
- machine
- pqr
- control
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Multiple Motors (AREA)
- Control Of Ac Motors In General (AREA)
- Induction Machinery (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
1,121,518. Control of A.C. motors. BROWN BOVERI & CO. Ltd. 29 Dec., 1966 [31 Dec., 1965], No. 58137/66. Heading H2J. [Also in Division G1] In an arrangement for deriving the slip frequency of an asynchronous machine 1, and which may alternatively be used to obtain a control frequency for speed control of the machine, the rotor shaft n of the asynchronous machine is coupled to that of an auxiliary measuring machine 4, which has symmetrical multiphase windings mounted on its rotor connected via slip rings to a multiphase source PQR. The auxiliary machine has no stator winding, but has Hall plates 8 symmetrically arranged in the air gap between stator and rotor which produce an output directly related to the induction in the gap at either the slip or control frequency, depending on the arrangement of the supply at PQR. To derive slip frequency, PQR is fed with the same frequency as that used to supply the asynchronous machine at RST, and arranged to rotate in the same way as the shaft n. The Hall plate output is then at a frequency fx-fn, the slip frequency. To provide a speed control frequency, PQR is fed with a desired slip frequency arranged to rotate in the opposite direction to the shaft n. The Hall plate output is then at a frequency fx+fn, the frequency which should be supplied to the machine 1 to produce the desired slip.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1965B0085222 DE1258159B (en) | 1965-12-31 | 1965-12-31 | Device for measuring the slip of asynchronous machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE317217B true SE317217B (en) | 1969-11-10 |
Family
ID=6982814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE1789266A SE317217B (en) | 1965-12-31 | 1966-12-29 |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1258159B (en) |
| GB (1) | GB1121518A (en) |
| SE (1) | SE317217B (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE965915C (en) * | 1953-10-25 | 1957-06-27 | Siemens Ag | Arrangement for displaying or measuring the speed of asynchronous machines |
| DE1093893B (en) * | 1955-08-20 | 1960-12-01 | Siemens Ag | Collectorless tacho dynamo for generating a speed-proportional DC voltage |
| DE1015245B (en) * | 1956-03-26 | 1957-09-05 | Licentia Gmbh | Procedure for measuring and displaying small speeds |
-
1965
- 1965-12-31 DE DE1965B0085222 patent/DE1258159B/en active Pending
-
1966
- 1966-12-29 SE SE1789266A patent/SE317217B/xx unknown
- 1966-12-29 GB GB5813766A patent/GB1121518A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1258159B (en) | 1968-01-04 |
| GB1121518A (en) | 1968-07-31 |
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