CN105846671A - Power supply device for precise instrument - Google Patents
Power supply device for precise instrument Download PDFInfo
- Publication number
- CN105846671A CN105846671A CN201610181581.2A CN201610181581A CN105846671A CN 105846671 A CN105846671 A CN 105846671A CN 201610181581 A CN201610181581 A CN 201610181581A CN 105846671 A CN105846671 A CN 105846671A
- Authority
- CN
- China
- Prior art keywords
- transistor
- resistance
- power supply
- electric capacity
- resistor
- 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.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
Abstract
The invention discloses a power supply device for a precise instrument. The power supply device comprises a power supply casing, and an input line, a surge suppression circuit board and an output line arranged in the power supply casing, wherein a first transistor, a first capacitor, a second capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor and a second transistor are arranged on the surge suppression circuit board. Power sent by the input line charges the first capacitor after voltage dividing. When the electric potential of the end, of the first capacitor, connected with the first transistor rises, the first transistor is accordingly changed into a conduction state from a cut-off state to realize the purpose of gradually transmitting power to the output line. Great surge current generated by an external power supply instantly charging electronic components in the precise instrument can be prevented, thereby protecting the precise instrument.
Description
Technical field
The present invention relates to precision instrument technical field, a kind of supply unit for precision instrument.
Background technology
Existing precision instrument is more and more, owing to instrument precision improves, causes it to use and requires the most strictly, such as the use voltage in the use cleanliness factor of environment, little scope, noise requirements etc., all can affect the use result of instrument.
For these precision instruments, in the moment that switches on power, power supply can produce the biggest surge current to electronic devices and components momentary charge in instrument, this surge current may reach 100 times of electronic devices and components static working current, electronic devices and components easily can be caused damage by it, reduce the life-span of electronic devices and components, be even likely to directly burn electronic devices and components and cause precision instrument cannot normally work or accurate reduction.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, propose a kind of supply unit for precision instrument, immediate current can be suppressed, reduce the damage to instrument.
In order to realize foregoing invention purpose, the present invention provides techniques below scheme: a kind of supply unit for precision instrument, including power supply shell, input line, surge restraint circuit plate and output lead it is provided with in described power supply shell, described surge restraint circuit plate is provided with the first transistor, the first electric capacity, the second electric capacity, the first resistance, the second resistance, the 3rd resistance, the 4th resistance and transistor seconds, and the importing end of the first transistor is connected with input line；After 3rd resistance and the 4th resistant series connect, in parallel with the importing end of the first transistor；The derivation end of the first transistor is connected with output lead；First electric capacity and the second electric capacity are connected in parallel on the output line, the first electric capacity other end is connected between the 3rd resistance and the 4th resistance through the control end of the first transistor, the control end of the first transistor imports end through the second resistance with transistor seconds and is connected, and the control end of transistor seconds and the first resistance connect.
Compared with prior art; the invention have the advantages that the first electric capacity is charged after dividing potential drop by input line power transmission; after the electromotive force of one end that the first electric capacity is connected with the first transistor raises; the first transistor is changed to conducting state by cut-off state accordingly; thus reach slowly to the purpose of output lead conveying electricity; avoid external power source that the electronic devices and components momentary charge in precision instrument is produced the biggest surge current, and then protect precision instrument.
Accompanying drawing explanation
Fig. 1 is the present invention structural representation for the supply unit of precision instrument.
Detailed description of the invention
Describing the present invention below in conjunction with the accompanying drawings, the description of this part is only exemplary and explanatory, should not have any restriction effect to protection scope of the present invention.
As shown in Figure 1, a kind of supply unit for precision instrument, including power supply shell, input line 1, surge restraint circuit plate 2 and output lead 3 it is provided with in described power supply shell, described surge restraint circuit plate 2 is provided with the first transistor the 4, first electric capacity the 5, second electric capacity the 11, first resistance the 8, second resistance the 10, the 3rd resistance the 6, the 4th resistance 7 and transistor seconds 9, and the importing end of the first transistor 4 is connected with input line 1；After 3rd resistance 6 and the 4th resistance 7 are connected in series, in parallel with the importing end of the first transistor 4；The derivation end of the first transistor 4 is connected with output lead 3；First electric capacity 5 and the second electric capacity 11 are connected in parallel on output lead 3, first electric capacity 5 other end is connected between the 3rd resistance 6 and the 4th resistance 7 through the control end of the first transistor 4, the control end of the first transistor 4 imports end through the second resistance 10 with transistor seconds 9 and is connected, and control end and first resistance 8 of transistor seconds 9 connect.
Input line 1 is connected with external power source, when connecting by the divider resistance of two series connection: the 3rd resistance 6 and the 4th resistance 7, first electric capacity 5 is charged, along with the first electric capacity 5 stored charge amount is gradually increased, correspondingly, this first transistor 4 gradually becomes conducting state from cut-off state, thus, the supply voltage that external power source is provided exports output lead 3 lentamente by this first transistor 4, and is charged the first electric capacity 5 and the second electric capacity 11 simultaneously.Second electric capacity 11 is for keeping the output voltage stabilization of output lead 3.
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (1)
1. the supply unit for precision instrument, it is characterized in that: include power supply shell, input line, surge restraint circuit plate and output lead it is provided with in described power supply shell, described surge restraint circuit plate is provided with the first transistor, the first electric capacity, the second electric capacity, the first resistance, the second resistance, the 3rd resistance, the 4th resistance and transistor seconds, and the importing end of the first transistor is connected with input line；After 3rd resistance and the 4th resistant series connect, in parallel with the importing end of the first transistor；The derivation end of the first transistor is connected with output lead；First electric capacity and the second electric capacity are connected in parallel on the output line, the first electric capacity other end is connected between the 3rd resistance and the 4th resistance through the control end of the first transistor, the control end of the first transistor imports end through the second resistance with transistor seconds and is connected, and the control end of transistor seconds and the first resistance connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610181581.2A CN105846671A (en) | 2016-03-28 | 2016-03-28 | Power supply device for precise instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610181581.2A CN105846671A (en) | 2016-03-28 | 2016-03-28 | Power supply device for precise instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105846671A true CN105846671A (en) | 2016-08-10 |
Family
ID=56584510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610181581.2A Pending CN105846671A (en) | 2016-03-28 | 2016-03-28 | Power supply device for precise instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105846671A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090219083A1 (en) * | 2008-03-03 | 2009-09-03 | Fujitsu Limited | Electric circuit device |
| CN102623977A (en) * | 2011-01-28 | 2012-08-01 | 富泰华工业（深圳）有限公司 | Electronic product |
| CN202917957U (en) * | 2012-10-26 | 2013-05-01 | 华立仪表集团股份有限公司 | Relay switching-off and switching-on control circuit for ammeter and intelligent ammeter |
-
2016
- 2016-03-28 CN CN201610181581.2A patent/CN105846671A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090219083A1 (en) * | 2008-03-03 | 2009-09-03 | Fujitsu Limited | Electric circuit device |
| CN102623977A (en) * | 2011-01-28 | 2012-08-01 | 富泰华工业（深圳）有限公司 | Electronic product |
| CN202917957U (en) * | 2012-10-26 | 2013-05-01 | 华立仪表集团股份有限公司 | Relay switching-off and switching-on control circuit for ammeter and intelligent ammeter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: No. 52 Kwun Tong Road in Liuzhou city of the Guangxi Zhuang Autonomous Region in 545000 Applicant after: LIUZHOU LONGHUI SCIENCE & TECHNOLOGY CO., LTD. Address before: 545000 the Guangxi Zhuang Autonomous Region road Liunan District Liuzhou City Lake No. 16 Applicant before: LIUZHOU LONGHUI SCIENCE & TECHNOLOGY CO., LTD. |
|
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160810 |