CN203119448U - Radio-frequency power supply under-power protective circuit - Google Patents
Radio-frequency power supply under-power protective circuit Download PDFInfo
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- CN203119448U CN203119448U CN 201320108885 CN201320108885U CN203119448U CN 203119448 U CN203119448 U CN 203119448U CN 201320108885 CN201320108885 CN 201320108885 CN 201320108885 U CN201320108885 U CN 201320108885U CN 203119448 U CN203119448 U CN 203119448U
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- 230000001681 protective effect Effects 0.000 title abstract 7
- 238000005070 sampling Methods 0.000 claims description 31
- 230000003321 amplification Effects 0.000 claims description 21
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 21
- 238000001514 detection method Methods 0.000 claims description 15
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 239000003990 capacitor Substances 0.000 claims description 9
- 238000003786 synthesis reaction Methods 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 230000009993 protective function Effects 0.000 abstract 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000009123 feedback regulation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Abstract
A radio-frequency power supply under-power protective circuit comprises a main power output unit, a controlling unit and an under-power protective unit. The radio-frequency power supply under-power protective circuit is characterized in that the under-power protective unit is connected with of an output end of the main power output unit, the under-power protective unit feeds back collected information to the controlling unit, and the main power output unit is adjusted through the control unit in a feedback mode. According to the radio-frequency power supply under-power protective circuit, a feedback unit is used for collecting real output power and judging whether the real output power is normal or not, and a judged result is transmitted to the controlling unit. The controlling unit controls and adjusts the main power output unit, so that the protective function of the circuit is achieved and other power devices are prevented from burning out.
Description
Technical Field
The utility model relates to an underpower protection circuit, in particular to laser radio frequency power supply's underpower protection circuit.
Background
The carbon dioxide laser has the advantages of high energy conversion efficiency, high optical quality of output light beams, good coherence, narrow line width, stable work and the like, so the carbon dioxide laser is widely applied to laser processing, medical treatment, atmospheric communication and other military applications.
The carbon dioxide laser in the current market is mainly divided into two types of direct current discharge excitation and radio frequency discharge excitation, wherein
When the radio frequency power supply of the radio frequency laser generally adopts a push-pull amplification power synthesis circuit, when the radio frequency power supply works, when one power tube is broken, although the output power is reduced, the circuit still continues to work, and thus, the power devices of other parts in the circuit are damaged.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problem, an object of the present invention is to provide a protection circuit for under-power of a radio frequency power supply.
In order to achieve the above object, the present invention provides an under-power protection circuit for a radio frequency power supply, which includes a main power output unit, a control unit and an under-power protection unit, and is characterized in that: the under-power protection unit is connected with the output end of the main power output unit, feeds collected information back to the control unit, and adjusts the main power output unit through the feedback of the control unit.
On the basis of the above scheme, preferably, the main power output unit includes a driving unit and a push-pull amplification power synthesis unit connected to the driving unit, and the control unit is connected to the driving unit and the push-pull amplification power synthesis unit, respectively.
On the basis of the above scheme, preferably, the under-power protection unit includes a sampling unit and a comparison unit, the sampling unit is connected to the output end of the push-pull amplification power synthesis unit, and the sampling unit is connected to the comparison unit.
On the basis of the above scheme, preferably, the sampling unit includes a coupling line, a filter connected to the coupling line, an attenuation circuit connected to the filter, and a detection tube, and an output end of the detection tube is connected to the comparison unit.
On the basis of the above scheme, preferably, the sampling unit further comprises a filter capacitor, one end of the filter capacitor is connected with the detection tube, and the other end of the filter capacitor is connected with a ground wire.
On the basis of the scheme, preferably, the comparison unit comprises an in-phase amplification circuit and an operational amplification circuit connected with the in-phase amplification circuit, the in-phase amplification circuit is connected with the output end of the sampling unit to receive the sampling signal, and the output end of the operational amplification circuit is connected with the controller.
On the basis of the above scheme, preferably, the comparison unit further comprises an amplifying circuit, the amplifying circuit is connected with the output end of the sampling unit and receives the sampling signal, and the output end of the amplifying circuit is connected with a detection device.
On the basis of the scheme, the detection device is preferably an oscilloscope.
Compared with the prior art, the utility model, its beneficial effect is: through the utility model discloses a feedback unit gathers the power of circuit actual output and compares the operation with it, when judging output is the underpower, with signal transmission to control circuit, control circuit feedback regulation control main power output unit, when output is the underpower, main power output unit stop work, prevent that other power device from continuing work consequently burn out, realize the protect function of circuit; otherwise, the main power output unit continues to work normally.
Drawings
Fig. 1 is a block diagram of an under-power protection circuit of a radio frequency power supply according to the present invention;
fig. 2 is a circuit diagram of a sampling unit of the under-power protection circuit of the radio frequency power supply of the present invention;
fig. 3 is a circuit diagram of a comparing unit of the under-power protection circuit of the radio frequency power supply of the present invention.
Detailed Description
In order to explain the technical content, structural features, achieved objects and functions of the present invention in detail, the following embodiments are described in detail with reference to the accompanying drawings.
Referring to fig. 1, the present invention provides an under-power protection circuit for a radio frequency power supply, which includes a main power output unit 10, a control unit 30 and an under-power protection unit 20, wherein the under-power protection unit 20 is connected to an output end of the main power output unit 10, the under-power protection unit 20 feeds back collected information to the control unit 30, and the main power output unit 10 is adjusted by the control unit 30, wherein:
the main power output unit 10 includes a driving unit 11, and a push-pull amplification power combining unit 12 connected to the driving unit. In order to ensure the synchronism of the operations of the driving unit 11 and the push-pull amplification power synthesis unit 12 and ensure the stability of the output power, the control unit 30 is connected to the driving unit 11 and the push-pull amplification power synthesis unit 12, respectively.
With reference to fig. 2 to fig. 3, the under-power protection unit 20 includes a sampling unit 21 and a comparing unit 22 connected to an output end of the sampling unit 21, the sampling unit 21 is connected to the main power output unit 10, collects output power information of the main power output unit 10, feeds the collected information back to the comparing unit 22, and the comparing unit 22 compares the collected information with a set normal power and transmits a comparison result to the control unit 30; wherein,
the sampling unit 21 comprises a coupling line 28, a filter 23 connected to the coupling line 28, an attenuation circuit 24 connected to the filter 23, and a detection tube 25, wherein an output end of the detection tube 25 is connected to the comparison unit 22. In order to make the output current signal more stable, the end of the detection tube 25 is connected with a filter capacitor 26, one end of the filter capacitor 26 is connected with the output end of the detection tube 25, and the other end is connected with the ground wire. In operation, the output POWER of the main POWER output unit 10 is output from a POWER output line, and the coupling line 28 of the sampling unit 21 couples the forward signal of the output POWER, and since the coupled forward signal is proportional to the output POWER, the magnitude of the output POWER can be measured by detecting the magnitude of the forward signal. Therefore, the forward signal is converted into a dc voltage signal through the filter 23, the power of the forward signal is reduced through the attenuation circuit 24, and the sampling signal is detected by the detection tube 24, and then transmitted to the 8P-2 port connection comparison unit 22 through the filter capacitor 26. Wherein,
the comparing unit 22 includes an in-phase amplifying circuit 222 and an operational amplifying circuit 223 connected to the in-phase amplifying circuit 222, the in-phase amplifying circuit 222 is connected to the output end 8P-2 of the sampling unit 21 to receive the sampling information, and the output end of the operational amplifying circuit 223 is connected to the controller 30. In operation, after the 8P-2 port of the in-phase amplifier circuit 222 receives the sampling information of the sampling unit 21, the in-phase amplifier circuit 222 and the operational amplifier circuit 223 perform amplification and comparison, and then transmit the comparison result to the FWD terminal in a high/low level manner, and transmit the signal to the control unit through the FWD terminal. When the output power of the main power output unit is under-power, the FWD end outputs high level, and the control unit cuts off the main power output unit according to the obtained signal to stop working, so that other power devices are prevented from being burnt out, and the protection function of the circuit is realized; otherwise, when the output power of the main power output unit is normal, the FWD outputs a low level, the control circuit outputs a normal signal, and the main power output unit continues to operate normally.
In order to facilitate a user to know the actual output power of the rf power source in real time, the comparing unit 22 further includes an amplifying circuit 221, the amplifying circuit 221 is connected to the output end of the sampling unit 21 and receives the sampling signal, and the output end 8P-3 of the amplifying circuit 221 is connected to a detecting device, wherein the detecting device is preferably an oscilloscope.
To sum up, the preferred embodiment of the present invention is only, the protection scope of the present invention is not limited thereto, and all equivalent changes and modifications made in accordance with the patent scope and the content of the specification of the present invention are all within the scope covered by the present invention.
Claims (8)
1. The utility model provides a radio frequency power supply under power protection circuit, its includes main power output unit, the control unit and under power protection unit, its characterized in that: the under-power protection unit is connected with the output end of the main power output unit, feeds collected information back to the control unit, and adjusts the main power output unit through the feedback of the control unit.
2. The under-power protection circuit for a radio frequency power supply of claim 1, wherein: the main power output unit comprises a driving unit and a push-pull amplification power synthesis unit connected with the driving unit, and the control unit is respectively connected with the driving unit and the push-pull amplification power synthesis unit.
3. The under-power protection circuit for a radio frequency power supply of claim 1, wherein: the under-power protection unit comprises a sampling unit and a comparison unit, wherein the sampling unit is connected with the output end of the push-pull amplification power synthesis unit, and the sampling unit is connected with the comparison unit.
4. The under-power protection circuit for a radio frequency power supply of claim 3, wherein: the sampling unit comprises a coupling line, a filter connected with the coupling line, an attenuation circuit connected with the filter and a detection tube, and the output end of the detection tube is connected with the comparison unit.
5. The under-power protection circuit for radio frequency power supply of claim 4, wherein: the sampling unit further comprises a filter capacitor, one end of the filter capacitor is connected with the detection tube, and the other end of the filter capacitor is connected with a ground wire.
6. The under-power protection circuit for a radio frequency power supply of claim 3, wherein: the comparison unit comprises an in-phase amplification circuit and an operational amplification circuit connected with the in-phase amplification circuit, the in-phase amplification circuit is connected with the output end of the sampling unit to receive sampling signals, and the output end of the operational amplification circuit is connected with the controller.
7. The under-power protection circuit for radio frequency power supply of claim 5, wherein: the comparison unit further comprises an amplifying circuit, the amplifying circuit is connected with the output end of the sampling unit and receives the sampling signal, and the output end of the amplifying circuit is connected with a detection device.
8. The under-power protection circuit for radio frequency power supply of claim 6, wherein: the detection device is an oscilloscope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320108885 CN203119448U (en) | 2013-03-11 | 2013-03-11 | Radio-frequency power supply under-power protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320108885 CN203119448U (en) | 2013-03-11 | 2013-03-11 | Radio-frequency power supply under-power protective circuit |
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| Publication Number | Publication Date |
|---|---|
| CN203119448U true CN203119448U (en) | 2013-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320108885 Expired - Fee Related CN203119448U (en) | 2013-03-11 | 2013-03-11 | Radio-frequency power supply under-power protective circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166179A (en) * | 2013-03-11 | 2013-06-19 | 深圳市安众电气有限公司 | Under-power protection circuit for radio-frequency power supply |
| CN104535862A (en) * | 2014-12-23 | 2015-04-22 | 北京航天测控技术有限公司 | Fault detection circuit and method for self-checking of frequency mixer |
-
2013
- 2013-03-11 CN CN 201320108885 patent/CN203119448U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166179A (en) * | 2013-03-11 | 2013-06-19 | 深圳市安众电气有限公司 | Under-power protection circuit for radio-frequency power supply |
| CN104535862A (en) * | 2014-12-23 | 2015-04-22 | 北京航天测控技术有限公司 | Fault detection circuit and method for self-checking of frequency mixer |
| CN104535862B (en) * | 2014-12-23 | 2017-04-05 | 北京航天测控技术有限公司 | A kind of failure detector circuit and detection method for frequency mixer self-inspection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Nong Yuanqin Inventor before: Guan Xiaochun |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: GUAN XIAOCHUN TO: NONG YUANQIN |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130807 Termination date: 20140311 |