CN201122480Y - Demagnetizing device of electromagnet - Google Patents
Demagnetizing device of electromagnet Download PDFInfo
- Publication number
- CN201122480Y CN201122480Y CNU2007200306332U CN200720030633U CN201122480Y CN 201122480 Y CN201122480 Y CN 201122480Y CN U2007200306332 U CNU2007200306332 U CN U2007200306332U CN 200720030633 U CN200720030633 U CN 200720030633U CN 201122480 Y CN201122480 Y CN 201122480Y
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- solenoid
- electromagnet
- current
- electromagnetic coil
- circuit
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Abstract
The utility model discloses a demagnetization device for an electromagnet. The demagnetization device comprises a working iron core, an electromagnetic coil and an electromagnetic coil working control circuit, wherein the electromagnetic coil is also electrically connected with a current attenuation oscillation circuit which is connected with the electromagnetic coil working control circuit in parallel, and a control relay used for controlling the electromagnet through the operating current or the damped oscillation current is electrically connected in the electromagnetic coil working control circuit; after the direct current electromagnet of the electromagnetic coil is powered off, a charging capacitor is charged by the alternating current power supply through the current attenuation oscillation circuit and the electromagnetic coil, the charged current gradually becomes smaller along with the continuously increase of the voltage at both ends of the charging capacitor, the current passing through the electromagnetic coil is alternatively changed, therefore, the purpose of ensuring an electromagnetic cylinder to be quickly demagnetized is achieved; the problem of remnant magnetism of the improved electromagnetic coil is solved, to ensure a bunker scale to be automatically reset after long term operation, therefore, the labor production efficiency is enhanced.
Description
Technical field
The utility model relates to a kind of demagnetizer, relates in particular to the demagnetizer of the electromagnet of traction blk weigher gage work in the cement manufacturing industry.
Background technology
Metering outfit when having used the feed blk weigher as batching in a large number in the cement manufacturing, magnet traction metering feed blk weigher batching control system adopts automatic cycle to survey zero mode.The periodic Control mode is adopted in metering, characteristics such as mechanical structure is simple, reliable, working service is convenient, metering standard.Solenoid is often in relatively good usefulness of use initial stage, prolongation along with service time, its inner core and iron pipe are easy to be magnetized, so after the solenoid outage, because of the existence of remanent magnetism is arranged, after bunker scale is unsnatched material, can not be very fast from horizontal reset, even can not reset, must could normally carry out next course of work behind the manual reset, the solenoid of having to more to renew sometimes solves the remanent magnetism problem, serious restriction the output and the quality of cement, increased staff's labour intensity and equipment maintenance cost.
The utility model content
Technical problem to be solved in the utility model provides a kind of demagnetizer that can eliminate the electromagnet of remanent magnetism fast.
For solving the problems of the technologies described above, the technical solution of the utility model is: the demagnetizer of electromagnet, comprise work iron core and solenoid, and solenoid working control circuit, described solenoid also is electrically connected with the current attenuation oscillating circuit, described current attenuation oscillating circuit is in parallel with described solenoid working control circuit, is electrically connected with the control relay of the described electromagnet of control by operating current or attenuated oscillation electric current in the described solenoid working control circuit.
As a kind of improvement, described solenoid working control circuit comprises controllable silicon, the solenoid of the work iron core of connecting with described controllable silicon, and controllable silicon turn-on power.
As further improvement, described current attenuation oscillating circuit comprises rectifier bridge, the output of described rectifier bridge is electrically connected with charging capacitor, described charging capacitor is parallel with discharge resistance, described discharge resistance is serially connected with discharge control switch, and described electromagnet solenoid is connected on the circuit of described rectifier bridge input.
As further improvement, described control relay is in parallel with described solenoid, the normally opened contact of described control relay is serially connected on the operating current circuit between described control relay and the described solenoid, another normally opened contact of described control relay is the discharge control switch of described discharge resistance, and the normally-closed contact of described control relay is serially connected on another input circuit of described current attenuation oscillating circuit.
Owing to adopted technique scheme, the demagnetizer of electromagnet, comprise work iron core and solenoid, and solenoid working control circuit, described solenoid also is electrically connected with the current attenuation oscillating circuit, described current attenuation oscillating circuit is in parallel with described solenoid working control circuit, is electrically connected with the control relay of the described electromagnet of control by operating current or attenuated oscillation electric current in the described solenoid working control circuit; After the outage of solenoid DC electromagnet, AC power is charged to charging capacitor by current attenuation oscillating circuit and solenoid, continuous rising along with the charging capacitor both end voltage, charging current is more and more littler, and be alternation, thereby make the electromagnetism cylinder purpose of demagnetization fast by the electric current of solenoid; Obtained solution through the remanent magnetism problem of improving solenoid, made bunker scale still can improve labor productivity after the use for a long time from horizontal reset.
Description of drawings
Accompanying drawing is the circuit diagram of the utility model embodiment.
Embodiment
As shown in drawings, the demagnetizer of electromagnet, comprise the unshakable in one's determination and solenoid YA of work, and solenoid working control circuit, described solenoid YA also is electrically connected with the current attenuation oscillating circuit, described current attenuation oscillating circuit is in parallel with described solenoid working control circuit, is electrically connected with the control relay KM of the described electromagnet of control by operating current or attenuated oscillation electric current in the described solenoid working control circuit.Described solenoid working control circuit comprises controllable silicon KP, the solenoid YA of the work iron core of connecting with described controllable silicon KP, and controllable silicon turn-on power DC; Described current attenuation oscillating circuit comprises rectifier bridge VD1, VD2, VD3, VD4, the output of described rectifier bridge VD1, VD2, VD3, VD4 is electrically connected with charging capacitor C, described charging capacitor C is parallel with discharge resistance R, described discharge resistance R is serially connected with discharge control switch, and described electromagnet solenoid YA is connected on the circuit of described rectifier bridge VD1, VD2, VD3, VD4 input; Described control relay KM is in parallel with described solenoid YA, the normally opened contact KM of described control relay YA is serially connected on the operating current circuit between described control relay KM and the described solenoid YA, another normally opened contact of described control relay KM is the discharge control switch of described discharge resistance R, and the normally-closed contact of described control relay KM is serially connected on another input circuit of described current attenuation oscillating circuit.
The 220V AC power is added on the side a and b binding post, when the gate pole D that is applied to thyristor KP as controllable silicon turn-on power DC goes up, thyristor KP conducting, direct current passes through solenoid YA, work of electromagnet, and relay coil KM also participates in work simultaneously, its normally-closed contact disconnects, all normally opened contact closures, charging capacitor C is by the discharge of discharge resistance R in this process, and described current attenuation oscillating circuit is not worked.
When the gate pole D of thyristor KP goes up no turn-on power, thyristor KP ends, solenoid YA and relay coil KM quit work, its normally-closed contact closure, all normally opened contacts are opened, described current attenuation oscillating circuit work, electric current connects rectifier bridge from 220V AC power A end through the normally-closed contact of relay coil KM, and and the solenoid YA that is electrically connected of rectifier bridge input form current circuit, arrive earth terminal at last, the dc output end of rectifier bridge is given charging capacitor C charging simultaneously, along with the voltage at charging capacitor C two ends constantly raises, charging current is more and more littler, and the alternating current of the solenoid YA of the electromagnet of flowing through is decayed, until alternating current is zero, so realized making the solenoid YA purpose of demagnetization fast.
Claims (4)
1. the demagnetizer of electromagnet, comprise the unshakable in one's determination and solenoid (YA) of work, and solenoid working control circuit, it is characterized in that: described solenoid (YA) also is electrically connected with the current attenuation oscillating circuit, described current attenuation oscillating circuit is in parallel with described solenoid working control circuit, is electrically connected with the control relay (KM) of the described electromagnet of control by operating current or attenuated oscillation electric current in the described solenoid working control circuit.
2. the demagnetizer of electromagnet as claimed in claim 1, it is characterized in that: described solenoid working control circuit comprises controllable silicon (KP), the solenoid (YA) of the work iron core of connecting with described controllable silicon (KP), and controllable silicon turn-on power (DC).
3. the demagnetizer of electromagnet as claimed in claim 1, it is characterized in that: described current attenuation oscillating circuit comprises rectifier bridge (VD1, VD2, VD3, VD4), the output of described rectifier bridge (VD1, VD2, VD3, VD4) is electrically connected with charging capacitor (C), described charging capacitor (C) is parallel with discharge resistance (R), described discharge resistance (R) is serially connected with discharge control switch, and described electromagnet solenoid (YA) is connected on the circuit of described rectifier bridge (VD1, VD2, VD3, VD4) input.
4. the demagnetizer of electromagnet as claimed in claim 3, it is characterized in that: described control relay (KM) is in parallel with described solenoid (YA), the normally opened contact (KM) of described control relay (YA) is serially connected on the operating current circuit between described control relay (KM) and the described solenoid (YA), another normally opened contact of described control relay (KM) is the discharge control switch of described discharge resistance (R), and the normally-closed contact of described control relay (KM) is serially connected on another input circuit of described current attenuation oscillating circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200306332U CN201122480Y (en) | 2007-11-08 | 2007-11-08 | Demagnetizing device of electromagnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200306332U CN201122480Y (en) | 2007-11-08 | 2007-11-08 | Demagnetizing device of electromagnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201122480Y true CN201122480Y (en) | 2008-09-24 |
Family
ID=40009716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200306332U Expired - Fee Related CN201122480Y (en) | 2007-11-08 | 2007-11-08 | Demagnetizing device of electromagnet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201122480Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101206946B (en) * | 2007-11-08 | 2011-09-14 | 于波涛 | Demagnetizing device of electromagnet |
| CN105989986A (en) * | 2015-02-28 | 2016-10-05 | 盖玥 | Simple magnetizing circuit |
-
2007
- 2007-11-08 CN CNU2007200306332U patent/CN201122480Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101206946B (en) * | 2007-11-08 | 2011-09-14 | 于波涛 | Demagnetizing device of electromagnet |
| CN105989986A (en) * | 2015-02-28 | 2016-10-05 | 盖玥 | Simple magnetizing circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080924 Termination date: 20101108 |