CN202033328U - Time-sharing magnetization circuit - Google Patents
Time-sharing magnetization circuit Download PDFInfo
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- CN202033328U CN202033328U CN2011201200350U CN201120120035U CN202033328U CN 202033328 U CN202033328 U CN 202033328U CN 2011201200350 U CN2011201200350 U CN 2011201200350U CN 201120120035 U CN201120120035 U CN 201120120035U CN 202033328 U CN202033328 U CN 202033328U
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Abstract
The utility model discloses a time-sharing magnetization power supply circuit and a time-sharing magnetization cross-yoke circuit, relating to the technology of magnetic particle inspection, in particular to the technology of time-sharing phase magnetization. The time-sharing magnetization power supply circuit and the time-sharing magnetization cross-yoke circuit have a simple structure; the depth of penetration into a workpiece for magnetization is more than the depth of penetration adopting the alternating current. In the technical scheme, a single-phase alternating-current power supply is rectified through a rectifier and the two magnetization circuits are respectively powered through time-sharing of positive and negative half waves with the time difference being pi. The utility model has the advantages that the circuits have a simple structure, defects of the workpiece close to the surface can be detected conveniently, and the circuits are mainly applied in magnetic particle inspection.
Description
Technical field
The utility model relates to the magnetic powder inspection technology, particularly a kind of phase place timesharing magnetization technology.
Background technology
The timesharing magnetization technology is a kind of technology that magnetization current is switched on to load respectively according to the regular hour program, utilizes the magnetization of different mistiming realizations to workpiece different parts different directions magnetic field.If this mistiming is enough little and repeat to realize, and the direction of different magnetic field also becomes respective angles (as vertical), and magnetic will condense on a plurality of directions, form the complete image of defective.
The timesharing magnetization can adopt multiple mode to realize, what wherein use at most is the electronics time-sharing approach.
The electronics time-sharing approach is an employing electronic technology control magnetization circuit, as adopting the PLC programming realization different time cycle vertical, circumferential magnetization circuit is powered.For example: in the magnetized a certain moment, circuit magnetizes circuit supply to certain single direction (as vertically), certain single direction (as vertically) magnetic field conducting, but at another constantly, circuit is again to the magnetization circuit supply of other direction (as circumferentially), other direction (as circumferentially) magnetic field conducting.Because two magnetic directions are orthogonal, (as 1s) can be regarded as workpiece has been realized comprehensive magnetization in the cycle sometime.
The another kind of mode of magnetization is the crossed yoke mode of magnetization, and crossed yoke is to intersect (being generally vertical) by certain angle with a pair of identical electromagnetic yoke, and its shape as shown in Figure 1.
Crossed yoke is used as rotating magnetic field, and its method is to adopt single-phase alternating current electric capacity phase shift system that electric current is divided into to differ
πTwo circuit of/2 are to the coil energising simultaneously respectively of two orthogonal yokes.During energising, the magnetic field of stack will form the magnetic field of intercropping sense of rotation at any time at pole center.
Though the existing mode of magnetization can have pair flat work pieces to realize once multi-faceted magnetization, but there is following defective: only adopt alternating current to detect, though surface imperfection sensitivity is higher, but it is too low near surface flaw sensitivity, particularly in welding inspection, incomplete fusion, lack of penetration, pore, slag inclusion and nearly surface crack are difficult to show.Especially for the application of crossed yoke as rotating magnetic field; In addition, because the capacitance phase-shifting circuit mode is complicated, the blind area can appear detecting on some particular orientation of rotating magnetic field.
The utility model content
Goal of the invention of the present utility model is: at the problem of above-mentioned existence, provide a kind of improved phase place timesharing magnetization circuit.
The technical solution adopted in the utility model is such: a kind of timesharing excitation supply circuit, comprise AC power, and it is characterized in that, also comprise first load, second load; AC power is carried out rectification through the commutation diode of two anti-phase connections at one end, the negative electrode of first commutation diode in described two diodes and the anode of second commutation diode connect, and its public connecting end is connected with AC power one end, two the commutation diode other ends and the AC power other end respectively as first power output end and second source output terminal to first load and second load energising magnetization.
Preferably, described AC power is a single phase alternating current power supply.
Preferably, described first load is the hot-wire coil on first yoke, and second load is the hot-wire coil on second yoke; Described two yoke right-angled intersections are placed.
Preferably, described AC power is a step-down transformer, and described step-down transformer comprises main coil and secondary coil; The main coil of step-down transformer is connected with single phase alternating current power supply; Transformer secondary coil one end links to each other with the commutation diode of described two anti-phase connections, and the other end links to each other with yoke coils from parallel connection of coils one end of two right-angled intersections.
Preferably, also comprise first fly-wheel diode and second fly-wheel diode; Described first fly-wheel diode is parallel to the first yoke coil two ends, and the negative electrode of first fly-wheel diode is connected with the negative electrode of the first half-wave rectification diode; Described second fly-wheel diode is parallel to the second yoke coil two ends, and the anode of second fly-wheel diode is connected with the anode of the second half-wave rectification diode.
In sum, owing to adopted technique scheme, the beneficial effects of the utility model are:
1, circuit structure is simple.
2, the magnetized magnetization current of phase place timesharing is a DC current, is half-wave rectified current specifically, and it penetrates the workpiece degree of depth than the alternating current flow depth, helps detecting the workpiece, defect on nearly surface.
Description of drawings
Fig. 1 is the crossed yoke structural representation.
Fig. 2 is the disclosed current phase timesharing of the utility model excitation supply circuit theory diagrams.
Fig. 3 is the disclosed current phase timesharing magnetization of the utility model circuit theory diagrams.
Fig. 4 is the disclosed current phase timesharing of the utility model crossed yoke magnetization circuit theory diagrams.
Embodiment
Below in conjunction with accompanying drawing, the utility model is done detailed explanation.
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
As shown in Figure 2, current phase timesharing excitation supply circuit comprises excitation supply, the first half-wave rectification diode, the second half-wave rectification diode, first via power output end and the second road power output end; The negative electrode of the anode of the described first half-wave rectification diode, the second half-wave rectification diode is connected in the A end of excitation supply simultaneously; The B end of described excitation supply constitutes first via power output end with the negative electrode of the first half-wave rectification diode; The B of described excitation supply end also constitutes the second road power output end with the anode of the second half-wave rectification diode simultaneously.Excitation supply A end, B end described herein are set just to distinguishing the excitation supply two ends, so that the clear more relativeness of describing each components and parts in the circuit.
As a kind of preferred implementation of current phase timesharing excitation supply circuit, described excitation supply is the single-phase AC excitation supply.
As shown in Figure 3, current phase timesharing crossed yoke magnetization circuit comprises excitation supply, first load, second load, the first half-wave rectification diode BG1 and the second half-wave rectification diode BG2.Described first load and second load are parallel to the excitation supply two ends respectively, the described first half-wave rectification diode BG1 is series in the closed-loop path of excitation supply and first load composition, and the anode of the first half-wave rectification diode BG1 is connected in the A end of excitation supply, and negative electrode is connected in an end of first load; The described second half-wave rectification diode BG2 is series in the closed-loop path that excitation supply and second load form, and the negative electrode of the second half-wave rectification diode BG2 is connected in the A end of excitation supply, and anode is connected in an end of the second yoke coil.
Excitation supply A end, B end described herein are set just to distinguishing the excitation supply two ends, so that the clear more relativeness of describing each components and parts in the circuit.
As a kind of preferred implementation of current phase timesharing crossed yoke magnetization circuit, described excitation supply is the single-phase AC excitation supply.
Fig. 4 is a current phase timesharing crossed yoke magnetization circuit preferred embodiment shown in Figure 3, and current phase timesharing crossed yoke magnetization circuit comprises single phase alternating current power supply, first yoke, second yoke, the first yoke coil, the second yoke coil, the first half-wave rectification diode BG1 and the second half-wave rectification diode BG2.The described first yoke coil is wound on first yoke, and the described second yoke coil is wound on second yoke.Described excitation supply is step-down transformer T, and step-down transformer T comprises main coil and secondary coil; The main coil of step-down transformer T is connected with single phase alternating current power supply; The described first yoke coil and the second yoke coil are parallel to the secondary coil two ends of described step-down transformer T respectively; The described first half-wave rectification diode BG1 is series in the closed-loop path that the secondary coil of step-down transformer T and the first yoke coil form, and the first half-wave rectification diode BG1 anode is connected in the A end of the secondary coil of step-down transformer T, and negative electrode is connected in an end of the first yoke coil; The described second half-wave rectification diode BG2 is series in the closed-loop path that the secondary coil of step-down transformer T and the second yoke coil form, and the second half-wave rectification diode BG1 negative electrode is connected in the A end of the secondary coil of step-down transformer T, and anode is connected in an end of the second yoke coil.
Secondary coil A end, the B end of step-down transformer T described herein are to set in order to distinguish the excitation supply two ends equally.
In the embodiment of above-mentioned described any one current phase timesharing crossed yoke magnetization circuit, can also increase by the first fly-wheel diode BG3 and the second fly-wheel diode BG4, see Fig. 4; The described first fly-wheel diode BG3 is parallel to the first yoke coil two ends, and the negative electrode of the first fly-wheel diode BG3 is connected with the negative electrode of the first half-wave rectification diode BG1; The described second fly-wheel diode BG4 is parallel to the second yoke coil two ends, and the anode of the second fly-wheel diode BG4 is connected with the anode of the second half-wave rectification diode BG2.The effect that increases fly-wheel diode is when preventing power cut-off, and the components and parts in the circuit are punctured by the induction electromotive force at yoke coil two ends.The voltage ratio of described step-down transformer can be 220:36.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (5)
1. a timesharing magnetization circuit comprises AC power, it is characterized in that, also comprises first load, second load; AC power is carried out rectification through the commutation diode of two anti-phase connections at one end, the negative electrode of first commutation diode in described two diodes and the anode of second commutation diode connect, and its public connecting end is connected with AC power one end, two the commutation diode other ends and the AC power other end respectively as first power output end and second source output terminal to first load and second load energising magnetization.
2. a kind of timesharing magnetization circuit according to claim 1 is characterized in that described AC power is a single phase alternating current power supply.
3. a kind of timesharing magnetization circuit according to claim 1 is characterized in that described first load is the hot-wire coil on first yoke, and second load is the hot-wire coil on second yoke; Described two yoke right-angled intersections are placed.
4. a kind of timesharing magnetization circuit according to claim 3 is characterized in that described AC power is a step-down transformer, and described step-down transformer comprises main coil and secondary coil; The main coil of step-down transformer is connected with single phase alternating current power supply; Transformer secondary coil one end links to each other with the commutation diode of described two anti-phase connections, and the other end links to each other with yoke coils from parallel connection of coils one end of two right-angled intersections.
5. according to a kind of timesharing magnetization circuit of claim 3 or 4, it is characterized in that, also comprise first fly-wheel diode and second fly-wheel diode; Described first fly-wheel diode is parallel to the first yoke coil two ends, and the negative electrode of first fly-wheel diode is connected with the negative electrode of the first half-wave rectification diode; Described second fly-wheel diode is parallel to the second yoke coil two ends, and the anode of second fly-wheel diode is connected with the anode of the second half-wave rectification diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201200350U CN202033328U (en) | 2011-04-22 | 2011-04-22 | Time-sharing magnetization circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201200350U CN202033328U (en) | 2011-04-22 | 2011-04-22 | Time-sharing magnetization circuit |
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| CN202033328U true CN202033328U (en) | 2011-11-09 |
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| CN2011201200350U Expired - Fee Related CN202033328U (en) | 2011-04-22 | 2011-04-22 | Time-sharing magnetization circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743812A (en) * | 2014-01-20 | 2014-04-23 | 爱德森（厦门）电子有限公司 | Design method for improving magnetic powder inspection capacity through simultaneous excitation at plurality of frequencies |
| JP2019211292A (en) * | 2018-06-01 | 2019-12-12 | 富士電機株式会社 | Device for evaluating surface stress and/or hardness of magnetic substance |
-
2011
- 2011-04-22 CN CN2011201200350U patent/CN202033328U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743812A (en) * | 2014-01-20 | 2014-04-23 | 爱德森（厦门）电子有限公司 | Design method for improving magnetic powder inspection capacity through simultaneous excitation at plurality of frequencies |
| CN103743812B (en) * | 2014-01-20 | 2016-08-24 | 爱德森（厦门）电子有限公司 | A kind of method for designing using multiple frequency excitation simultaneously to improve magnetic powder inspection capacity |
| JP2019211292A (en) * | 2018-06-01 | 2019-12-12 | 富士電機株式会社 | Device for evaluating surface stress and/or hardness of magnetic substance |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111109 Termination date: 20150422 |
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| EXPY | Termination of patent right or utility model |