CN201927986U - Induction-heating power-supply fault-alarming circuit - Google Patents
Induction-heating power-supply fault-alarming circuit Download PDFInfo
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- CN201927986U CN201927986U CN2011200128331U CN201120012833U CN201927986U CN 201927986 U CN201927986 U CN 201927986U CN 2011200128331 U CN2011200128331 U CN 2011200128331U CN 201120012833 U CN201120012833 U CN 201120012833U CN 201927986 U CN201927986 U CN 201927986U
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- comparator
- alarm
- transistor
- buz
- field effect
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 8
- 230000005669 field effect Effects 0.000 claims abstract description 23
- 230000006698 induction Effects 0.000 claims description 5
- 239000013078 crystal Substances 0.000 abstract 4
- 238000001514 detection method Methods 0.000 description 3
- 238000003851 corona treatment Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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Abstract
The utility model relates to an induction-heating power-supply fault-alarming circuit, wherein a power supply V+ is connected with a collector of a crystal triode Q1, a base electrode of the crystal triode Q1 is connected with a starting signal, a resistor R1 is also arranged between the base electrode of the crystal triode Q1 and the starting signal, an emitter of the crystal triode Q1 is connected with an anode end of an alarm BUZ, a cathode end of the alarm BUZ is connected with a drain electrode of a field-effect tube Q2, a source electrode of the field-effect tube Q2 is grounded, a grid electrode of the field-effect tube Q2 is connected with an output end 1 of a comparator U1A, a resistor R3 is also arranged between the grid electrode of the field-effect tube Q2 and the end 1 of the comparator U1A, the resistor R3 at one side of the field-effect tube Q2 is connected with one end of a resistor R2, the other end of the resistor R2 is grounded, an inverting input end 2 of the comparator U1A is connected with a cathode end of a diode D, an anode end of the diode D is connected with a current transformer, and a non-inverting input end 3 of the comparator U1A is connected with a 0.2V reference. The induction-heating power-supply fault-alarming circuit disclosed by the utility model has the advantages of fewer used elements, concise circuit and simple, convenient and accurate mode of fault discrimination.
Description
Technical field
The utility model relates to electronic technology field, relates in particular to a kind of failure alarm circuit that is applied to induction heating power and corona treatment.
Background technology
Traditional warning circuit is with the various protective circuits interlock of complete machine, some component failure may occur, makes the complete machine no-output, and the situation that warning circuit is failure to actuate.So not only influenced machine operation, also make user's income be affected.So, be badly in need of a kind of improved technology and solve this problem.
Summary of the invention
The purpose of this utility model provides a kind of simple and practical failure alarm circuit.
The technical solution adopted in the utility model is:
The induction heating power failure alarm circuit, comprise alarm BUZ and comparator U1A, described power supply V+ links to each other with the collector electrode of transistor Q1, the base stage of described transistor Q1 is connected with enabling signal, also be provided with resistance R 1 between the base stage of described transistor Q1 and the enabling signal, the emitter of described transistor Q1 links to each other with the positive terminal of alarm BUZ, the negative pole end of described alarm BUZ links to each other with the drain electrode of field effect transistor Q2, the source ground of described field effect transistor Q2, the grid of described field effect transistor Q2 links to each other with output 1 end of comparator U1A, also be provided with resistance R 3 between 1 end of the grid of described field effect transistor Q2 and comparator U1A, described resistance R 3 is connected with an end of resistance R 2 in the side of field effect transistor Q2, the other end ground connection of described resistance R 2, inverting input 2 ends of described comparator U1A are connected with the negative pole end of diode D, the positive terminal of described diode D links to each other with current transformer, and normal phase input end 3 ends of described comparator U1A link to each other with the 0.2V benchmark.
The utility model has the advantages that: behind host-initiated, whatsoever the situation that no current flows through load appears in reason, warning circuit moves at once, sends sound and light signal, to the user prompt equipment fault, the use element is few, and circuit is succinct, and the mode of differentiating fault is easy accurately.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
As shown in Figure 1, induction heating power failure alarm circuit of the present utility model, comprise alarm BUZ and comparator U1A, power supply V+ links to each other with the collector electrode of transistor Q1, the base stage of transistor Q1 is connected with enabling signal, also be provided with resistance R 1 between the base stage of transistor Q1 and the enabling signal, the emitter of transistor Q1 links to each other with the positive terminal of alarm BUZ, the negative pole end of alarm BUZ links to each other with the drain electrode of field effect transistor Q2, the source ground of field effect transistor Q2, the grid of field effect transistor Q2 links to each other with output 1 end of comparator U1A, also be provided with resistance R 3 between 1 end of the grid of field effect transistor Q2 and comparator U1A, resistance R 3 is connected with an end of resistance R 2 in the side of field effect transistor Q2, the other end ground connection of resistance R 2, inverting input 2 ends of comparator U1A are connected with the negative pole end of diode D, the positive terminal of diode D links to each other with current transformer, current transformer is used for load current detection circuit, normal phase input end 3 ends of comparator U1A link to each other with the 0.2V benchmark, behind host-initiated, reason whatsoever, the situation that no current flows through load appears, warning circuit moves at once, send sound and light signal, to the user prompt equipment fault, the use element is few, and circuit is succinct, and the mode of differentiating fault is easy accurately.
The principle summary: transistor Q1 is for penetrating the collection follower, no enabled instruction, transistor Q1 ends, power supply V+ can not add to alarm BUZ, alarm BUZ can not work, behind the host-initiated, a polarity is arranged is positive enabling signal (amplitude is slightly less than the voltage signal of V+) adds to the base stage of transistor Q1 by resistance R 1, obtains positive voltage by the emitter of transistor Q1 device BUZ taking alarm positive terminal.If main frame operate as normal, load just have electric current, the current transformer load current detection circuit just has level to deliver to comparator U1A, comparator U1A output low level, and field effect transistor Q2 ends, and alarm BUZ does not send warning.Whatsoever former thereby cause no-load current, the current transformer load current detection circuit does not have level and delivers to comparator U1A, comparator U1A output high level makes field effect transistor Q2 conducting, alarm BUZ negative pole end is by field effect transistor Q2 ground connection, because of transistor Q1 conducting, alarm BUZ promptly sends alarm signal.
Claims (1)
1. induction heating power failure alarm circuit, it is characterized in that: comprise alarm BUZ and comparator U1A, described power supply V+ links to each other with the collector electrode of transistor Q1, the base stage of described transistor Q1 is connected with enabling signal, also be provided with resistance R 1 between the base stage of described transistor Q1 and the enabling signal, the emitter of described transistor Q1 links to each other with the positive terminal of alarm BUZ, the negative pole end of described alarm BUZ links to each other with the drain electrode of field effect transistor Q2, the source ground of described field effect transistor Q2, the grid of described field effect transistor Q2 links to each other with output 1 end of comparator U1A, also be provided with resistance R 3 between 1 end of the grid of described field effect transistor Q2 and comparator U1A, described resistance R 3 is connected with an end of resistance R 2 in the side of field effect transistor Q2, the other end ground connection of described resistance R 2, inverting input 2 ends of described comparator U1A are connected with the negative pole end of diode D, the positive terminal of described diode D links to each other with current transformer, and normal phase input end 3 ends of described comparator U1A link to each other with the 0.2V benchmark.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200128331U CN201927986U (en) | 2011-01-17 | 2011-01-17 | Induction-heating power-supply fault-alarming circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200128331U CN201927986U (en) | 2011-01-17 | 2011-01-17 | Induction-heating power-supply fault-alarming circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201927986U true CN201927986U (en) | 2011-08-10 |
Family
ID=44431821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200128331U Expired - Lifetime CN201927986U (en) | 2011-01-17 | 2011-01-17 | Induction-heating power-supply fault-alarming circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201927986U (en) |
-
2011
- 2011-01-17 CN CN2011200128331U patent/CN201927986U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 226200 Jiangsu city of Nantong province Qidong City Huilong Town Industrial Park Corner Patentee after: NANTONG SANXIN PLASTICS EQUIPMENT TECHNOLOGY CO., LTD. Address before: 226200 Jiangsu city of Nantong province Qidong City Huilong Town Industrial Park Corner Patentee before: Nantong Sanxin Plastics Equipment Technology Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20110810 |
|
| CX01 | Expiry of patent term |