CN203522564U - Power supply circuit used for measurement at high-tension side - Google Patents
Power supply circuit used for measurement at high-tension side Download PDFInfo
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- CN203522564U CN203522564U CN201320492190.4U CN201320492190U CN203522564U CN 203522564 U CN203522564 U CN 203522564U CN 201320492190 U CN201320492190 U CN 201320492190U CN 203522564 U CN203522564 U CN 203522564U
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Abstract
The utility model relates to a power supply circuit used for measurement at the high-tension side. The power supply circuit is composed of a chip U1, a rectification bridge D1, a capacitor C2, an electrolytic capacitor C, an electrolytic capacitor C4, a diode V3, a mutual-inductive coil L1, a capacitor C1, a bidirectional silicon controlled rectifier V1, a bidirectional trigger diode V2 and a resistor R1. The circuit is used for limiting the instantaneous voltage of a power supply, wherein the single ac voltage peak is controlled under 45V; a DC/DC device LM2575HV with a relatively wide voltage input is selected, and 5V voltage is output after transformation, and is then converted into corresponding voltage of the power supply.
Description
Technical field
The utility model relates to a kind of high-pressure side measurement power circuit, belongs to the circuit field that using silicon controlled ac current source is converted to direct voltage source.
Background technology
The measurement of high-pressure side electric weight and non electrical quantity needs accessory power supply, at present main flow supply power mode utilize laser and solar powered, utilize current transformer to obtain electric energy two classes from bus.
Utilizing current transformer to get energy from high voltage bus, is to utilize special open-core transformer easy for installation induced voltage from bus, after processing, offers the necessary power supply of high-pressure side electronic circuit by subsequent conditioning circuits such as rectification, filtering, voltage stabilizings.
Utilize current transformer from high voltage bus get can, when the little current status of bus current in zero load, electricity shortage; And when bus is in surpassing the current state of rated current, or even during short-circuit current, supply power voltage is excessive.
Utility model content
In order to solve the problem of above-mentioned existence, the utility model discloses a kind of high-pressure side measurement power circuit, this equipment is a kind of measurement power circuit in high-pressure side simple in structure, safe and reliable, easy to use, with low cost, this circuit is limited the instantaneous voltage as power supply, guarantee that the unimodal value of alternating voltage is controlled at below 45V, select the DC/DC device LM2575HV of wider voltage input, through conversion output 5V, then be converted to corresponding supply voltage.
A kind of high-pressure side measurement power circuit, by chip U1, rectifier bridge D1, capacitor C 2, electrochemical capacitor C3, electrochemical capacitor C4, diode V3, mutual inductor L1, capacitor C 1, bidirectional triode thyristor V1, bidirectional trigger diode V2, form with resistance R 1, it is characterized in that: rectifier bridge D1 pin one connects bidirectional triode thyristor V1 one end, rectifier bridge D1 pin 3 connects the bidirectional triode thyristor V1 other end, capacitor C 1 is connected in parallel on respectively and is connected bidirectional triode thyristor V1 both sides with inductance, bidirectional trigger diode V2 is in parallel with bidirectional trigger diode again after connecting with resistance R 1, power supply connects 4 pins of chip U1, the 5 pin ground connection of U1, the 3 pin ground connection of U1, 2 pins of U1 meet diode V3, the other end ground connection of V3, 1 pin of U1 meets electric capacity electrochemical capacitor C3, the other end ground connection of electrochemical capacitor C3, capacitor C 2 one termination 45V voltage other end ground connection, 2 pins of rectifier bridge D2 and 4 pins are connected in parallel on the two ends of C2.
As a kind of improvement of the present utility model, a kind of high-pressure side measurement power circuit according to claim 1 and 2, is characterized in that: described rectifier bridge D1 is comprised of 4 diodes, described chip U1 selects LM2575HV-5.0, V3 selects 1N5819, and L1 selects 470 μ H, and C2 selects 0.1 μ F/63V, C3 selects 100 μ F/63V, C4 selects 220 μ F/16V, and V1 selects BTA16, and V2 selects DB4, R1 selects 510 Europe, and C1 selects 2.2 μ F/ 100V.After adopting this design, guarantee that the unimodal value of alternating voltage is controlled at below 45V, select the DC/DC device LM2575HV of wider voltage input, through conversion output 5V, then be converted to corresponding supply voltage.
This circuit is limited the instantaneous voltage as power supply, guarantees that the unimodal value of alternating voltage is controlled at below 45V, selects the DC/DC device LM2575HV of wider voltage input, through conversion output 5V, then is converted to corresponding supply voltage.
Accompanying drawing explanation
Fig. 1 is alternating voltage negative-feedback circuit figure of the present utility model,
Fig. 2 is DC/DC Switching Power Supply of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the utility model.
embodiment 1:
Visible by reference to the accompanying drawings, a kind of high-pressure side measurement power circuit, by chip U1, rectifier bridge D1, capacitor C 2, electrochemical capacitor C3, electrochemical capacitor C4, diode V3, mutual inductor L1, capacitor C 1, bidirectional triode thyristor V1, bidirectional trigger diode V2, form with resistance R 1, it is characterized in that: rectifier bridge D1 pin one connects bidirectional triode thyristor V1 one end, rectifier bridge D1 pin 3 connects the bidirectional triode thyristor V1 other end, capacitor C 1 is connected in parallel on respectively and is connected bidirectional triode thyristor V1 both sides with inductance, bidirectional trigger diode V2 is in parallel with bidirectional trigger diode again after connecting with resistance R 1, power supply connects 4 pins of chip U1, the 5 pin ground connection of U1, the 3 pin ground connection of U1, 2 pins of U1 meet diode V3, the other end ground connection of V3, 1 pin of U1 meets electric capacity electrochemical capacitor C3, the other end ground connection of electrochemical capacitor C3, capacitor C 2 one termination 45V voltage other end ground connection, 2 pins of rectifier bridge D2 and 4 pins are connected in parallel on the two ends of C2.
embodiment 2:
As a kind of improvement of the present utility model, a kind of high-pressure side measurement power circuit according to claim 1 and 2, is characterized in that: described rectifier bridge D1 is comprised of 4 diodes, described chip U1 selects LM2575HV-5.0, V3 selects 1N5819, and L1 selects 470 μ H, and C2 selects 0.1 μ F/63V, C3 selects 100 μ F/63V, C4 selects 220 μ F/16V, and V1 selects BTA16, and V2 selects DB4, R1 selects 510 Europe, and C1 selects 2.2 μ F/ 100V.After adopting this design, guarantee that the unimodal value of alternating voltage is controlled at below 45V, select the DC/DC device LM2575HV of wider voltage input, through conversion output 5V, then be converted to corresponding supply voltage.All the other design features are identical with embodiment 1 with advantage.
The utility model can also be combined into new execution mode by embodiment 2 and embodiment 1.
The utility model, concrete use procedure is as follows: the variation of alternating voltage instantaneous value is latched on electric capacity, effectively filtering High-frequency Interference pulse, bidirectional trigger diode V2 selects DB4, its trigger voltage is 35 ~ 45V, and when between AC1 and AC2, instantaneous voltage is lower than trigger voltage, circuit is in blocking state; When between AC1 and AC2, voltage is higher than trigger voltage value, two-way trigger tube instantaneous short-circuit, triggers bidirectional triode thyristor V1 and turns to conducting, and external voltage is started to reduce, On current also reduces, and between AC1 and AC2, voltage is clamped near the trigger voltage of bidirectional trigger diode V2.When above alternating voltage negative-feedback circuit action, the peak of alternating voltage waveform and Gu Jun are scabbled, and unimodal value is restricted.
The output AC signal of alternating voltage negative-feedback circuit is after bridge rectifier and filter circuit, and output dc voltage just can not exceed 45V.
Because the fluctuation of bus current is larger, the input voltage of this circuit changes also greatly, after D1 bridge rectifier, voltage is less than 60V at 5V to 45V() range, the internal switch circuit of LM2575 is normally worked, output voltage directly feeds back through inside and relatively processes, control switch circuit working, guarantees that electric power output voltage is stabilized in 5V.
The disclosed technological means of the utility model scheme is not limited only to the disclosed technological means of above-mentioned technological means, also comprises the technical scheme being comprised of above technical characterictic combination in any.
Claims (1)
1. a high-pressure side measurement power circuit, by chip U1, rectifier bridge D1, capacitor C 2, electrochemical capacitor C3, electrochemical capacitor C4, diode V3, mutual inductor L1, capacitor C 1, bidirectional triode thyristor V1, bidirectional trigger diode V2, form with resistance R 1, it is characterized in that: rectifier bridge D1 pin one connects bidirectional triode thyristor V1 one end, rectifier bridge D1 pin 3 connects the bidirectional triode thyristor V1 other end, capacitor C 1 is connected in parallel on respectively and is connected bidirectional triode thyristor V1 both sides with inductance, bidirectional trigger diode V2 is in parallel with bidirectional trigger diode again after connecting with resistance R 1, power supply connects 4 pins of chip U1, the 5 pin ground connection of U1, the 3 pin ground connection of U1, 2 pins of U1 meet diode V3, the other end ground connection of V3, 1 pin of U1 meets electric capacity electrochemical capacitor C3, the other end ground connection of electrochemical capacitor C3, capacitor C 2 one termination 45V voltage other end ground connection, 2 pins of rectifier bridge D2 and 4 pins are connected in parallel on the two ends of C2, described rectifier bridge D1 is comprised of 4 diodes, described chip U1 selects LM2575HV-5.0, V3 selects 1N5819, L1 selects 470 μ H, C2 selects 0.1 μ F/63V, C3 selects 100 μ F/63V, C4 selects 220 μ F/16V, V1 selects BTA16, V2 selects DB4, R1 selects 510 Europe, C1 selects 2.2 μ F/ 100V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320492190.4U CN203522564U (en) | 2013-08-13 | 2013-08-13 | Power supply circuit used for measurement at high-tension side |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320492190.4U CN203522564U (en) | 2013-08-13 | 2013-08-13 | Power supply circuit used for measurement at high-tension side |
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| Publication Number | Publication Date |
|---|---|
| CN203522564U true CN203522564U (en) | 2014-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320492190.4U Expired - Fee Related CN203522564U (en) | 2013-08-13 | 2013-08-13 | Power supply circuit used for measurement at high-tension side |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105634301A (en) * | 2014-10-29 | 2016-06-01 | 国家电网公司 | Power supply measurement method of high voltage side |
| CN113597819A (en) * | 2019-02-12 | 2021-11-02 | 意斐株式会社 | Bidirectional thyristor module |
-
2013
- 2013-08-13 CN CN201320492190.4U patent/CN203522564U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105634301A (en) * | 2014-10-29 | 2016-06-01 | 国家电网公司 | Power supply measurement method of high voltage side |
| CN113597819A (en) * | 2019-02-12 | 2021-11-02 | 意斐株式会社 | Bidirectional thyristor module |
| CN113597819B (en) * | 2019-02-12 | 2024-01-30 | 意斐株式会社 | Bidirectional silicon controlled module |
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| Date | Code | Title | Description |
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| 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: 20140402 Termination date: 20140813 |
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| EXPY | Termination of patent right or utility model |