CN207396705U - The automatic precision pre-check device of transformer winding no-load voltage ratio tester - Google Patents
The automatic precision pre-check device of transformer winding no-load voltage ratio tester Download PDFInfo
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- CN207396705U CN207396705U CN201721284386.9U CN201721284386U CN207396705U CN 207396705 U CN207396705 U CN 207396705U CN 201721284386 U CN201721284386 U CN 201721284386U CN 207396705 U CN207396705 U CN 207396705U
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Abstract
The utility model discloses a kind of automatic precision pre-check device of transformer winding no-load voltage ratio tester, solve cumbersome existing for the device that existing pair of transformer voltage ratio tester is verified, error rate is high and no-load voltage ratio test verifies discontinuous problem.Transformer winding no-load voltage ratio tester and square shape iron core, are provided with verification winding on the iron core of square shape iron core, are provided with leading screw supporting rack and leading screw on the outside of verification winding, slide plate, upper verification winding are connected on feed screw nut（22）Beginning（20）, upper verification winding（22）End（21）, lower verification winding（23）Beginning（11）With lower verification winding（23）End（12）It is electrically connected respectively with transformer winding no-load voltage ratio tester.The utility model realizes the automatic continuous accurate verification to transformer winding no-load voltage ratio tester, easy to operate, and it is easy to realize.
Description
Technical field
The present invention relates to a kind of no-load voltage ratio verifying attachment, laboratory's inspection of more particularly to a kind of transformer winding no-load voltage ratio tester
Experiment device and accurate method of calibration.
Background technology
No-load voltage ratio and other parameter of the transformer voltage ratio tester to the winding of transformer are often used at power transmission and transformation scene
On-the-spot test is carried out, test process is by four binding posts of transformer voltage ratio tester primary and secondary side with transformer respectively
It links together, then carries out the no-load voltage ratio test of transformer primary, vice-side winding.In order to ensure the accuracy of test, transformer becomes
Than tester in use for some time than return to laboratory and verified, to ensure its accuracy；Existing method of calibration is
It is simulated in laboratory with manual variable rheostat instead of the transformer in scene, manually converts the gear of manual variable rheostat to change
Become the no-load voltage ratio of access, read the reading of transformer voltage ratio tester, by the reading of transformer voltage ratio tester that will read and
The gear reading of the manual variable rheostat of manual change is compared, and judges whether the accuracy of transformer winding no-load voltage ratio tester reaches
Regulation requirement；There are following defects for this method of inspection：It is manually to convert manual variable rheostat during the test first
Gear changes the no-load voltage ratio of access, and the test for making no-load voltage ratio is in discrete state, it is impossible to proof of genuineness transformer winding no-load voltage ratio tester
True precision；The followed by cumbersome error rate of knob-operated is high, often rotates the phenomenon that not in place；Followed by it does not adapt to
The requirement of intelligent development.
The content of the invention
The present invention provides the automatic precision pre-check devices and method of calibration of a kind of transformer winding no-load voltage ratio tester, solve
Cumbersome existing for the device that existing pair of transformer voltage ratio tester is verified, error rate is high and no-load voltage ratio test verification
Discontinuous technical problem.
The present invention is to solve more than technical problem by the following technical programs：
A kind of automatic precision pre-check device of transformer winding no-load voltage ratio tester, including transformer winding no-load voltage ratio tester and
Square shape iron core is provided on the upper core of square shape iron core and verifies winding, set on the lower core of square shape iron core
Have a lower verification winding, the shape and structure of upper verification winding be with the shape of lower verification winding and completely identical in structure, upper
Upper leading screw supporting rack is provided on the outside of verification winding, upper leading screw is provided on upper leading screw supporting rack, the left end of upper leading screw leads to
The output shaft for crossing upper coupling and upper stepper motor links together, and upper leading screw nut is movably set in upper leading screw, upper
Slide plate fixed seat is connected on feed screw nut, slide plate is provided in upper slide plate fixed seat, upper slide plate is movably arranged on
It verifies on winding；Lower leading screw supporting rack is provided on the outside of lower verification winding, lower leading screw is provided on lower leading screw supporting rack,
The right end of lower leading screw is linked together by the output shaft of lower coupler and lower stepper motor, under being movably set in lower leading screw
Feed screw nut is connected with lower slide plate fixed seat on lower leading screw nut, and lower slide plate, lower slide plate are provided in upper slide plate fixed seat
It is movably arranged on lower verification winding；The upper verification beginning of winding, upper slide plate, the beginning of lower verification winding and lower slide plate respectively with
Transformer winding no-load voltage ratio tester is electrically connected.
The left inside side of upper leading screw supporting rack is provided with left travel switch, is provided in the Right Inboard of upper leading screw supporting rack
Upper right travel switch, upper left travel switch and upper right travel switch are electrically connected respectively with upper stepper motor；In lower leading screw
The left inside side of supporting rack is provided with bottom left travel switch, and the Right Inboard of lower leading screw supporting rack is provided with bottom right travel switch, under
Left travel switch and bottom right travel switch are electrically connected respectively with lower stepper motor.
A kind of automatic precision pre-check method of transformer winding no-load voltage ratio tester, it is characterised in that following steps：
Winding is verified on being set on the upper core of square shape iron core, is verified under being set on the lower core of square shape iron core
Winding, the shape and structure of upper verification winding be with the lower verification shape of winding and completely identical in structure, in upper verification winding
Outside upper leading screw supporting rack is set, upper leading screw is set on upper leading screw supporting rack, the left end of upper leading screw by upper coupling with
The output shaft of upper stepper motor links together, and activity setting upper leading screw nut, connects on upper leading screw nut in upper leading screw
Upper slide plate fixed seat, sets slide plate in upper slide plate fixed seat, and upper slide plate is movably arranged on verification winding；In lower verification
The outside of winding sets lower leading screw supporting rack, lower leading screw is set on lower leading screw supporting rack, the right end of lower leading screw passes through lower shaft coupling
The output shaft of device and lower stepper motor links together, the activity setting lower leading screw nut in lower leading screw, on lower leading screw nut
Lower slide plate fixed seat is connected with, slide plate under being set in upper slide plate fixed seat, lower slide plate is movably arranged on lower verification winding；On
Beginning, upper slide plate, the beginning of lower verification winding and the lower slide plate for verifying winding are electrically connected respectively with transformer winding no-load voltage ratio tester
It is connected together；
Upper slide plate is moved at the beginning of upper verification winding, lower slide plate is moved at the beginning of lower verification winding, opened
Beginning no-load voltage ratio check test controls the time of the operation of lower stepper motor and upper stepper motor, you can complete the setting to no-load voltage ratio；
By the beginning of upper verification winding, the end of upper verification winding, the beginning of lower verification winding, the lower end for verifying winding
End, upper slide plate and lower slide plate link together with an Industrial Control Computer, and tested upper verification winding is made to be formed with industrial personal computer and is measured
Circuit makes lower verification winding form lower measuring loop with calibration feedback device and industrial personal computer, and industrial personal computer measures and relatively upper measurement
The electric current of electric current and lower measuring loop in circuit finely tunes two stepper motors, until two electric current with the ratio of this two electric current
Ratio is equal to the inverse ratio that setting becomes ratio, so as to complete the accurate verification of no-load voltage ratio.
The present invention realizes the automatic continuous accurate verification to transformer winding no-load voltage ratio tester, easy to operate, realizes and holds
Easily.
Description of the drawings
Fig. 1 is the structure diagram of the present invention.
Specific embodiment
The present invention is described in detail below in conjunction with the accompanying drawings：
A kind of automatic precision pre-check device of transformer winding no-load voltage ratio tester, including transformer winding no-load voltage ratio tester and
Square shape iron core is provided with verification winding 22 on the upper core of square shape iron core, is set on the lower core of square shape iron core
Lower verification winding 23 is equipped with, the shape and structure of upper verification winding 22 are identical with the shape of lower verification winding 23 and structure
, the outside of upper verification winding 22 is provided with upper leading screw supporting rack 25, upper leading screw 15 is provided on upper leading screw supporting rack 25,
The left end of upper leading screw 15 is linked together by upper coupling 17 and the output shaft of upper stepper motor 19, movable in upper leading screw 15
Upper leading screw nut 16 is provided with, slide plate fixed seat 24 is connected on upper leading screw nut 16, is set in upper slide plate fixed seat 24
Slide plate 18 is equipped with, upper slide plate 18 is movably arranged on verification winding 22；The outside of lower verification winding 23 is provided with lower silk
Thick stick supporting rack 3, is provided with lower leading screw 4 on lower leading screw supporting rack 3, and the right end of lower leading screw 4 passes through lower coupler 9 and lower stepping electricity
The output shaft of machine 10 links together, and lower leading screw nut 5 is movably set in lower leading screw 4, is connected on lower leading screw nut 5
Lower slide plate fixed seat 7, is provided with lower slide plate 8 in upper slide plate fixed seat 7, and lower slide plate 8 is movably arranged on lower verification winding 23；
Beginning 20, upper slide plate 18, the beginning 11 of lower verification winding 23 and the lower slide plate 8 of upper verification winding 22 become respectively with transformer winding
It is electrically connected than tester.
The left inside side of upper leading screw supporting rack 25 is provided with left travel switch 13, in the Right Inboard of upper leading screw supporting rack 25
Upper right travel switch 14 is provided with, upper left travel switch 13 and upper right travel switch 14 are connected electrically in respectively with upper stepper motor 19
Together；The left inside side of lower leading screw supporting rack 3 is provided with bottom left travel switch 1, is provided in the Right Inboard of lower leading screw supporting rack 3
Bottom right travel switch 2, bottom left travel switch 1 and bottom right travel switch 2 are electrically connected respectively with lower stepper motor 10.Work as cunning
When piece is moved to the beginning or end of winding, triggering travel switch action makes stepper motor stop driving, and anti-slip limiting plate slides.
A kind of automatic precision pre-check method of transformer winding no-load voltage ratio tester, it is characterised in that following steps：
Winding 22 is verified on being set on the upper core of square shape iron core, school under being set on the lower core of square shape iron core
Test winding 23, the shape and structure of upper verification winding 22 be with the shape of lower verification winding 23 and completely identical in structure, upper
The outside for verifying winding 22 sets upper leading screw supporting rack 25, and upper leading screw 15 is set on upper leading screw supporting rack 25, upper leading screw 15
Left end is linked together by upper coupling 17 and the output shaft of upper stepper motor 19, the activity setting upper leading screw in upper leading screw 15
Nut 16, the slide plate fixed seat 24 in connection on upper leading screw nut 16, sets slide plate 18, upper cunning in upper slide plate fixed seat 24
Piece 18 is movably arranged on verification winding 22；Lower leading screw supporting rack 3 is set in the outside of lower verification winding 23, in lower leading screw branch
Lower leading screw 4 is set on support 3, and the right end of lower leading screw 4 is connected to one by the output shaft of lower coupler 9 and lower stepper motor 10
It rises, activity setting lower leading screw nut 5, is connected with lower slide plate fixed seat 7, in upper slide plate on lower leading screw nut 5 in lower leading screw 4
Lower slide plate 8 is set in fixed seat 7, and lower slide plate 8 is movably arranged on lower verification winding 23；It is upper verification winding 22 beginning 20, on
Slide plate 18, the beginning 11 of lower verification winding 23 and lower slide plate 8 are electrically connected respectively with transformer winding no-load voltage ratio tester；
Upper slide plate 18 is moved at the beginning 20 of upper verification winding 22, lower slide plate 8 is moved to lower verification winding 23
At beginning 11, start no-load voltage ratio check test, control the time of the operation of lower stepper motor 10 and upper stepper motor 19, you can complete
Setting to no-load voltage ratio；
By the beginning 20 of upper verification winding 22, the end 21 of upper verification winding 22, lower beginning 11, the lower school for verifying winding 23
End 12, upper slide plate 18 and the lower slide plate 8 for testing winding 23 link together with an Industrial Control Computer, make tested upper verification winding 22
Upper measuring loop is formed with industrial personal computer, lower verification winding 23 is made to form lower measure back with verification feedback device 26 and industrial personal computer 27
Road, industrial personal computer measure and compare the electric current in measuring loop and the electric current of lower measuring loop, are come with the ratio of this two electric current micro-
Two stepper motors are adjusted, the inverse ratio for becoming ratio are set until two current ratio is equal to, so as to complete the accurate verification of no-load voltage ratio.Exactly
Due in checking procedure, always there is the appearance of fractional error, so being equipped with calibration feedback device in systems, help more accurate
Adjusting no-load voltage ratio situation.When motor, which rotates, adjusts no-load voltage ratio, it can realize that accurate no-load voltage ratio controls by motor turnning circle, at this time school
Quasi- feedback device provides small voltage so that winding coil is formed into a loop, and no-load voltage ratio is detected by the ratio between measuring loop electric current
Whether adjusting is accurate, and result is fed back to controller and is adjusted.
Since the rotating speed of stepper motor is：
；
Wherein：υ is motor speed, and unit is rev/min（rpm）；For frequency, unit is hertz（Hz）；N is subdivision times
Number；θ is intrinsic stepping angle, and unit is degree；
The intrinsic stepping angle θ of stepper motor of the present invention is 1.8 °, frequency 200Hz, is exactly per second turn 1 circle, subdivision is again
Number n is arranged to 1, and motor speed υ is 60 revs/min, i.e. 1 revolution per second；Leading screw selects the leading screw of 200 millimeters of C0 grades, then helical pitch is missed
Difference control now selects the leading screw that helical pitch is 1 millimeter at 3.5 μm, then feed screw nut is per second advances 1 millimeter, then the advance speed of slide plate
Degree is also per second for 1 millimeter；Assuming that the resistivity of verification winding is ρ, a diameter of r, a diameter of R of winding iron core of winding are verified,
Then descend slide plate 8 per second by it is lower verification winding 23 resistance value be：
；
Due to lower verification winding 23 with upper verification winding 22 using same apparatus, then upper slide plate 18 it is per second by upper verification around
The resistance value of group 22 is R22Equal to R23, it is n if you need to the ratio for selecting to set lower verification winding 23 and upper verification winding 22 now23：
n22, then：
n22：n23=（T23R23）：（T22R22）；
Wherein T23, T23The respectively duration of runs of motor 10 and motor 19, due to R22=R23, then n23：n22=T23：T22, institute
The setting to no-load voltage ratio can be completed using the time for controlling motor operation.
Claims (2)
1. a kind of automatic precision pre-check device of transformer winding no-load voltage ratio tester, including transformer winding no-load voltage ratio tester and mouth
Font iron core is provided on the upper core of square shape iron core and verifies winding（22）, set on the lower core of square shape iron core
It is equipped with lower verification winding（23）, upper verification winding（22）Shape and structure be and lower verification winding（23）Shape and structure it is complete
Exactly the same, which is characterized in that in upper verification winding（22）Outside be provided with upper leading screw supporting rack（25）, supported in upper leading screw
Frame（25）On be provided with upper leading screw（15）, upper leading screw（15）Left end pass through upper coupling（17）With upper stepper motor（19）It is defeated
Shaft links together, in upper leading screw（15）On be movably set with upper leading screw nut（16）, in upper leading screw nut（16）Upper connection
There is upper slide plate fixed seat（24）, in upper slide plate fixed seat（24）On be provided with slide plate（18）, upper slide plate（18）It is movably arranged on
Upper verification winding（22）On；In lower verification winding（23）Outside be provided with lower leading screw supporting rack（3）, in lower leading screw supporting rack
（3）On be provided with lower leading screw（4）, lower leading screw（4）Right end pass through lower coupler（9）With lower stepper motor（10）Output shaft connect
It is connected together, in lower leading screw（4）On be movably set with lower leading screw nut（5）, in lower leading screw nut（5）On be connected with lower slide plate and consolidate
Reservation（7）, in upper slide plate fixed seat（7）On be provided with lower slide plate（8）, lower slide plate（8）It is movably arranged on lower verification winding（23）
On；Upper verification winding beginning（20）, upper slide plate（18）, lower verification winding beginning（11）With lower slide plate（8）Respectively with transformer around
Group no-load voltage ratio tester is electrically connected.
2. a kind of automatic precision pre-check device of transformer winding no-load voltage ratio tester according to claim 1, feature exist
In in upper leading screw supporting rack（25）Left inside side be provided with left travel switch（13）, in upper leading screw supporting rack（25）The right side in
Side is provided with upper right travel switch（14）, upper left travel switch（13）With upper right travel switch（14）Respectively with upper stepper motor
（19）It is electrically connected；In lower leading screw supporting rack（3）Left inside side be provided with bottom left travel switch（1）, supported in lower leading screw
Frame（3）Right Inboard be provided with bottom right travel switch（2）, bottom left travel switch（1）With bottom right travel switch（2）Respectively with lower step
Stepper motor（10）It is electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721284386.9U CN207396705U (en) | 2017-10-02 | 2017-10-02 | The automatic precision pre-check device of transformer winding no-load voltage ratio tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721284386.9U CN207396705U (en) | 2017-10-02 | 2017-10-02 | The automatic precision pre-check device of transformer winding no-load voltage ratio tester |
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| Publication Number | Publication Date |
|---|---|
| CN207396705U true CN207396705U (en) | 2018-05-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107728092A (en) * | 2017-10-02 | 2018-02-23 | 国网山西省电力公司电力科学研究院 | The automatic precision pre-check device and method of calibration of Transformer Winding no-load voltage ratio tester |
-
2017
- 2017-10-02 CN CN201721284386.9U patent/CN207396705U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107728092A (en) * | 2017-10-02 | 2018-02-23 | 国网山西省电力公司电力科学研究院 | The automatic precision pre-check device and method of calibration of Transformer Winding no-load voltage ratio tester |
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