CN205195612U - Excitation unit - Google Patents
Excitation unit Download PDFInfo
- Publication number
- CN205195612U CN205195612U CN201520719310.9U CN201520719310U CN205195612U CN 205195612 U CN205195612 U CN 205195612U CN 201520719310 U CN201520719310 U CN 201520719310U CN 205195612 U CN205195612 U CN 205195612U
- Authority
- CN
- China
- Prior art keywords
- triode
- diode
- connects
- resistance
- protection diode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses an excitation unit belongs to the electromagnetic equipment field, including low pressure linear power supply U1, resistance R0 and diode D5's current circuit, resistance R0's other end connection triode T1, triode T2, triode T1 with triode T2 corresponds respectively and connects diode D1 with diode D2, excitation coil L1 establish ties in triode T1, triode T2's current circuit, excitation coil L1's parallelly connected protective diode D3 in both ends and protective diode D4, triode T3's collecting electrode is connected to excitation coil L1's 1 end, triode T4's collecting electrode is connected to excitation coil L1's 2 ends, series resistance R1, operational amplifier connection are passed through to triode T3's base triode T4's projecting pole, triode T4's projecting pole passes through series resistance R2 ground connection. The utility model discloses stopped to lead to the triode by the phenomenon of reverse breakdown because the negative potential arouses the afterflow at the excitation in -process, reduced excitation circuit heat power, improved the reliability.
Description
Technical field
The utility model relates to electromagnetic equipment field, specifically, is a kind of Energizing unit.
Background technology
In electromagnetic equipment, transducer field circuit Main Function is for transducer provides reliable and stable excitation drive singal, in order to improve the dynamic response performance of transducer in electromagnetic equipment, the excitation frequency of electromagnetic flowmeter must be improved, such cycle shortens, exciting current is just not easy to enter stable state, thus sensor output signal just should not obtain the zero point of stable state, in this process, because excitation direction switches fast, cause induced electromotive force stress large, make circuit caloric value serious, reliability reduces.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of Energizing unit.
For achieving the above object, the utility model provides following technical scheme:
The utility model relates to a kind of Energizing unit, it is characterized in that, comprise low-pressure linear power supply U1, resistance R0 and diode D5, the positive pole of described diode D5 connects the output of described low-voltage line power supply U1, and the negative pole of described diode D5 connects the input of described low-voltage line power supply U1, contact resistance R0 between the output of described low-pressure linear power supply U1 and adjustable side, the other end connecting triode T1 of resistance R0, triode T2, described triode T1 and described triode T2 is connected respectively described diode D1 and described diode D2, wherein, the positive pole of described diode D1 connects the collector electrode of described triode T1, and the negative pole of described diode D1 connects the emitter of described triode T1, the positive pole of described diode D2 connects the collector electrode of described triode T2, the negative pole of described diode D2 connects the emitter of described triode T2, magnet exciting coil L1 is connected on triode T1, in the series circuit of triode T2, two ends parallel connection protection diode D3 and the protection diode D4 of described magnet exciting coil L1, the positive pole of described protection diode D3 is connected with described protection diode D4 positive pole, described protection diode D3 is connected described magnet exciting coil L1 two ends respectively with the negative pole of described protection diode D4, wherein, described protection diode D3 and described protection diode D4 node indirectly, the collector electrode of the 1 end connecting triode T3 of described magnet exciting coil L1, the collector electrode of the 2 end connecting triode T4 of described magnet exciting coil L1, the emitter of described triode T3 connects the base stage of described triode T4, the base stage of described triode T3 is by series resistance R1, operational amplifier connects the emitter of described triode T4, the emitter of described triode T4 is by series resistance R2 ground connection.
Compared with prior art, good effect of the present utility model is:
1. the utility model phenomenon of having stopped to cause triode to be reversed because negative potential causes afterflow in excitation process and puncturing, reduces field circuit heating power, improves reliability.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present utility model.
Embodiment
The technological means realized to make the utility model, character of innovation, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the utility model further.
As shown in Figure 1, a kind of Energizing unit, is characterized in that, comprise low-pressure linear power supply U1, resistance R0 and diode D5, the positive pole of described diode D5 connects the output of described low-voltage line power supply U1, and the negative pole of described diode D5 connects the input of described low-voltage line power supply U1, contact resistance R0 between the output of described low-pressure linear power supply U1 and adjustable side, the other end connecting triode T1 of resistance R0, triode T2, described triode T1 and described triode T2 is connected respectively described diode D1 and described diode D2, wherein, the positive pole of described diode D1 connects the collector electrode of described triode T1, and the negative pole of described diode D1 connects the emitter of described triode T1, the positive pole of described diode D2 connects the collector electrode of described triode T2, the negative pole of described diode D2 connects the emitter of described triode T2, magnet exciting coil L1 is connected on triode T1, in the series circuit of triode T2, two ends parallel connection protection diode D3 and the protection diode D4 of described magnet exciting coil L1, the positive pole of described protection diode D3 is connected with described protection diode D4 positive pole, described protection diode D3 is connected described magnet exciting coil L1 two ends respectively with the negative pole of described protection diode D4, wherein, described protection diode D3 and described protection diode D4 node indirectly, the collector electrode of the 1 end connecting triode T3 of described magnet exciting coil L1, the collector electrode of the 2 end connecting triode T4 of described magnet exciting coil L1, the emitter of described triode T3 connects the base stage of described triode T4, the base stage of described triode T3 is by series resistance R1, operational amplifier connects the emitter of described triode T4, the emitter of described triode T4 is by series resistance R2 ground connection.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, therefore all changes be intended in the implication of the equivalency by dropping on claim and scope are included in the utility model, any Reference numeral in claim should be considered as the claim involved by limiting.
Claims (1)
1. an Energizing unit, is characterized in that, comprises low-pressure linear power supply U1, resistance R0 and diode D5, and the positive pole of described diode D5 connects the output of described low-voltage line power supply U1, and the negative pole of described diode D5 connects the input of described low-voltage line power supply U1, contact resistance R0 between the output of described low-pressure linear power supply U1 and adjustable side, the other end connecting triode T1 of resistance R0, triode T2, described triode T1 and described triode T2 is connected respectively described diode D1 and described diode D2, wherein, the positive pole of described diode D1 connects the collector electrode of described triode T1, and the negative pole of described diode D1 connects the emitter of described triode T1, the positive pole of described diode D2 connects the collector electrode of described triode T2, the negative pole of described diode D2 connects the emitter of described triode T2, magnet exciting coil L1 is connected on triode T1, in the series circuit of triode T2, two ends parallel connection protection diode D3 and the protection diode D4 of described magnet exciting coil L1, the positive pole of described protection diode D3 is connected with described protection diode D4 positive pole, described protection diode D3 is connected described magnet exciting coil L1 two ends respectively with the negative pole of described protection diode D4, wherein, described protection diode D3 and described protection diode D4 node indirectly, the collector electrode of the 1 end connecting triode T3 of described magnet exciting coil L1, the collector electrode of the 2 end connecting triode T4 of described magnet exciting coil L1, the emitter of described triode T3 connects the base stage of described triode T4, the base stage of described triode T3 is by series resistance R1, operational amplifier connects the emitter of described triode T4, the emitter of described triode T4 is by series resistance R2 ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520719310.9U CN205195612U (en) | 2015-09-17 | 2015-09-17 | Excitation unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520719310.9U CN205195612U (en) | 2015-09-17 | 2015-09-17 | Excitation unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205195612U true CN205195612U (en) | 2016-04-27 |
Family
ID=55788556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520719310.9U Expired - Fee Related CN205195612U (en) | 2015-09-17 | 2015-09-17 | Excitation unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205195612U (en) |
-
2015
- 2015-09-17 CN CN201520719310.9U patent/CN205195612U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20160427 Termination date: 20160917 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |