CN211720253U - Self-recovery type overvoltage and undervoltage protector circuit - Google Patents
Self-recovery type overvoltage and undervoltage protector circuit Download PDFInfo
- Publication number
- CN211720253U CN211720253U CN202020348996.6U CN202020348996U CN211720253U CN 211720253 U CN211720253 U CN 211720253U CN 202020348996 U CN202020348996 U CN 202020348996U CN 211720253 U CN211720253 U CN 211720253U
- Authority
- CN
- China
- Prior art keywords
- voltage
- processing part
- resistor
- power supply
- circuit
- 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.)
- Active
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses an under-voltage protector circuit is crossed to self-resuming formula solves that present stage voltage range is narrow, conversion efficiency is low, self interference immunity hangs down the scheduling problem. The device comprises a power supply processing part, a signal processing part, an analog-digital A/D conversion and voltage signal processing part, a relay control part and an indicating part; the power supply processing part is sequentially connected with the signal processing part, the analog-digital A/D conversion and voltage signal processing part, the relay control part and the indicating part; the power supply processing part comprises a primary surge protection circuit, a full-wave rectification circuit, a secondary surge protection circuit and a switching power supply voltage reduction circuit which are sequentially connected. The double surge protection and secondary surge protection circuit is arranged at the rear end of the full-wave rectification circuit, the switching power supply is used for reducing voltage, one level of electricity is converted into voltage or current required by a user side, the conversion efficiency is obviously improved, the self anti-interference performance is strong, and the voltage range is wide.
Description
Technical Field
The utility model relates to a protector circuit technical field, concretely relates to under-voltage protector circuit is crossed to self-resuming formula.
Background
The self-recovery type over-voltage and under-voltage protector is used for protecting single-phase electric equipment, namely, the zero line and the live line are over-high or over-low in voltage to damage the electric equipment, the power supply is cut off in time, and the power supply is switched on again after the voltage is recovered to be within a normal range and is delayed. The self-recovery overvoltage and undervoltage protector in the prior art has the problems of narrow circuit voltage range, low conversion efficiency, low self anti-interference performance and the like, and troubles the development of the self-recovery overvoltage and undervoltage protector.
Disclosure of Invention
The utility model aims at: in order to overcome prior art's defect, the utility model provides a from undervoltage protection ware circuit is crossed to recovery formula solves that present stage voltage range is narrow, conversion efficiency is low, self interference immunity hangs down the scheduling problem.
The technical scheme of the utility model: the device comprises a power supply processing part, a signal processing part, an analog-digital A/D conversion and voltage signal processing part, a relay control part and an indicating part; the power supply processing part is sequentially connected with the signal processing part, the analog-digital A/D conversion and voltage signal processing part, the relay control part and the indicating part; the signal processing part is used for processing and judging the voltage signal and driving the relay control part; the relay control part is used for finishing the driving of the relay according to the driving signal of the signal processing part; the power supply processing part comprises a primary surge protection circuit, a full-wave rectification circuit, a secondary surge protection circuit and a switching power supply voltage reduction circuit which are sequentially connected.
By adopting the technical scheme, the secondary surge protection circuit and the secondary surge protection circuit are positioned at the rear end of the full-wave rectification circuit, the switching power supply is used for reducing voltage, one level voltage is converted into the voltage or the current required by the user side, the conversion efficiency is obviously improved, the self anti-interference performance is strong, and the voltage range is wide.
Further, the primary surge protection circuit comprises a piezoresistor YM1, a resistor R1 and a piezoresistor YM2, wherein the piezoresistor YM1 and the piezoresistor YM2 are connected with a live wire and a zero line for surge protection, and the resistor R1 is used for voltage reduction; the full-wave rectification circuit comprises a rectification bridge DB1 for full-wave rectification; the secondary surge protection circuit comprises a resistor R2, a resistor R3, a chip U1, a diode D2 and a diode D3; the switching power supply voltage reduction circuit comprises a chip U4, an electrolytic capacitor E3, a voltage stabilizing diode DZ1, an inductor L1, a diode D5 and an electrolytic capacitor E4, and is used for reducing voltage and reducing high voltage to a working power supply required by a rear relay control part.
Still further, the signal processing part comprises a resistor R4, a resistor R5, a resistor R6, a diode D4, a diode D7, a resistor R7, a capacitor C1 and an electrolytic capacitor E2, wherein the resistor R4 and the resistor R5 play a role in reducing voltage of signals, the diode D7 performs half-wave rectification, the resistor R6 performs signal voltage division, and the diode D4, the resistor R7, the capacitor C1 and the electrolytic capacitor E2 perform secondary filtering and stabilization of signal voltage.
Furthermore, the analog-digital A/D conversion and voltage signal processing part comprises an analog-digital conversion chip U3, and the analog-digital conversion chip U3 is used for signal analysis.
Still further, the relay control part comprises a normally closed relay, wherein the normally closed relay is in a pull-in state when the power supply voltage is out of a protection range, and is in a release state when the normally closed relay works.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
the device comprises a power supply processing part 1, a signal processing part 2, an analog-digital A/D conversion and voltage signal processing part 3, a relay control part 4, an indication part 5, a primary surge protection circuit 11, a full-wave rectification circuit 12, a secondary surge protection circuit 13 and a switching power supply voltage reduction circuit 14.
Detailed Description
The self-recovery overvoltage and undervoltage protector circuit shown in fig. 1 comprises a power supply processing part 1, a signal processing part 2, an analog-to-digital (A/D) conversion and voltage signal processing part 3, a relay control part 4 and an indication part 5; the power supply processing part 1 is connected with the signal processing part 2, the analog-digital A/D conversion and voltage signal processing part 3, the relay control part 4 and the indicating part 5 in sequence; the signal processing part 2 is used for processing and judging the voltage signal and driving the relay control part 4; the relay control part 4 is used for finishing the driving of the relay according to the driving signal of the signal processing part; the power processing part 1 comprises a primary surge protection circuit 11, a full-wave rectification circuit 12, a secondary surge protection circuit 13 and a switching power supply voltage reduction circuit 14 which are connected in sequence. The two-time surge protection and secondary surge protection circuit 13 is positioned at the rear end of the full-wave rectification circuit 12, and then the switching power supply is used for reducing voltage, one level of voltage is converted into voltage or current required by a user terminal, the conversion efficiency is obviously improved, the self anti-interference performance is strong, and the voltage range is wide. The power supply signal voltage fluctuation signal is converted into a digital signal through analog-to-digital (A/D) conversion and processed, so that the protected voltage and recovery delay time are more accurate, and the control is more reasonable.
The primary surge protection circuit 11 comprises a piezoresistor YM1, a resistor R1 and a piezoresistor YM2, wherein the piezoresistor YM1 and the piezoresistor YM2 are connected with a live line and a zero line for surge protection, and the resistor R1 is used for voltage reduction; the full-wave rectification circuit 12 includes a rectification bridge DB1 for full-wave rectification; the secondary surge protection circuit 13 comprises a resistor R2, a resistor R3, a chip U1, a diode D2 and a diode D3; the switching power supply voltage reduction circuit 14 comprises a chip U4, an electrolytic capacitor E3, a voltage stabilizing diode DZ1, an inductor L1, a diode D5 and an electrolytic capacitor E4, and is used for reducing voltage and reducing high voltage to a working power supply required by a rear relay control part.
The signal processing part 2 comprises a resistor R4, a resistor R5, a resistor R6, a diode D4, a diode D7, a resistor R7, a capacitor C1 and an electrolytic capacitor E2, wherein the resistor R4 and the resistor R5 play a role in reducing voltage of signals, the diode D7 performs half-wave rectification, the resistor R6 performs signal voltage division, and the diode D4, the resistor R7, the capacitor C1 and the electrolytic capacitor E2 perform secondary filtering and stabilization of signal voltage, so that the fluctuation of the signals is reduced, and the A/D signals are conveniently processed by the analog-to-digital conversion chip U3.
The analog-to-digital A/D conversion and voltage signal processing part 3 comprises an analog-to-digital conversion chip U3, and the analog-to-digital conversion chip U3 performs signal analysis. The analog-digital conversion chip U3 is in a working state after stable power supply voltage exists, a power supply main signal is obtained from the A/D port to be subjected to signal analysis, the protector is protected when the voltage between the zero line and the live line is greater than 270VAC +/-5VAC or less than 170VAC +/-5VAC through calculation, the relay is in an attraction state, when the voltage is recovered to be between 240VAC +/5VAC and 190VAC +/-5VAC, the relay can enter a delay state, and the relay is released to enter a normal state after the delay is finished.
The relay control part 4 comprises a normally closed relay, the normally closed relay is used for controlling, and when the power supply voltage is out of a protection range, the relay is closed to cut off a main circuit; and when the relay is in a normal working state, the relay is released to close the main circuit, so that the effects of energy conservation and consumption reduction are achieved.
Claims (5)
1. The utility model provides a from undervoltage protection ware circuit is crossed to recovery formula which characterized in that: the device comprises a power supply processing part, a signal processing part, an analog-digital A/D conversion and voltage signal processing part, a relay control part and an indicating part; the power supply processing part is sequentially connected with the signal processing part, the analog-digital A/D conversion and voltage signal processing part, the relay control part and the indicating part; the signal processing part is used for processing and judging the voltage signal and driving the relay control part; the relay control part is used for finishing the driving of the relay according to the driving signal of the signal processing part; the power supply processing part comprises a primary surge protection circuit, a full-wave rectification circuit, a secondary surge protection circuit and a switching power supply voltage reduction circuit which are sequentially connected.
2. The self-healing under-voltage protector circuit of claim 1, wherein: the primary surge protection circuit comprises a piezoresistor YM1, a resistor R1 and a piezoresistor YM2, wherein the piezoresistor YM1 and the piezoresistor YM2 are connected with a live line and a zero line for surge protection, and the resistor R1 is used for voltage reduction; the full-wave rectification circuit comprises a rectification bridge DB1 for full-wave rectification; the secondary surge protection circuit comprises a resistor R2, a resistor R3, a chip U1, a diode D2 and a diode D3; the switching power supply voltage reduction circuit comprises a chip U4, an electrolytic capacitor E3, a voltage stabilizing diode DZ1, an inductor L1, a diode D5 and an electrolytic capacitor E4, and is used for reducing voltage and reducing high voltage to a working power supply required by a rear relay control part.
3. The self-healing overvoltage and undervoltage protector circuit of claim 1 or 2, wherein: the signal processing part comprises a resistor R4, a resistor R5, a resistor R6, a diode D4, a diode D7, a resistor R7, a capacitor C1 and an electrolytic capacitor E2, wherein the resistor R4 and the resistor R5 play a role in reducing voltage of signals, the diode D7 performs half-wave rectification, the resistor R6 performs signal voltage division, and the diode D4, the resistor R7, the capacitor C1 and the electrolytic capacitor E2 perform secondary filtering and stabilization of signal voltage.
4. The self-healing overvoltage and undervoltage protector circuit of claim 1 or 2, wherein: the analog-digital A/D conversion and voltage signal processing part comprises an analog-digital conversion chip U3.
5. The self-healing overvoltage and undervoltage protector circuit of claim 1 or 2, wherein: the relay control part comprises a normally closed relay, the normally closed relay is in a pull-in state when the power supply voltage is out of a protection range, and the normally closed relay is in a release state when the normally closed relay works.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020348996.6U CN211720253U (en) | 2020-03-18 | 2020-03-18 | Self-recovery type overvoltage and undervoltage protector circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020348996.6U CN211720253U (en) | 2020-03-18 | 2020-03-18 | Self-recovery type overvoltage and undervoltage protector circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211720253U true CN211720253U (en) | 2020-10-20 |
Family
ID=73397396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020348996.6U Active CN211720253U (en) | 2020-03-18 | 2020-03-18 | Self-recovery type overvoltage and undervoltage protector circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211720253U (en) |
-
2020
- 2020-03-18 CN CN202020348996.6U patent/CN211720253U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103022978B (en) | For the over under-voltage protection circuit of multiple pulse rectification circuit | |
| CN203589679U (en) | Vehicle-mounted single-phase AC power supply intelligent monitoring unit | |
| CN201490686U (en) | Self-recover overvoltage-undervoltage protector | |
| CN103050938A (en) | Full-automatic over-voltage and under-voltage time-delaying protector | |
| CN211720253U (en) | Self-recovery type overvoltage and undervoltage protector circuit | |
| CN204243716U (en) | Electric device fault secure circuit | |
| CN203491680U (en) | Automatic reset electric leakage overvoltage/undervoltage protection circuit | |
| CN208158141U (en) | A kind of high-tension line PT electricity getting device | |
| CN207625441U (en) | A kind of soft starting circuit of anti-over-pressed, under-voltage surge | |
| CN111416323A (en) | Self-recovery type over-voltage and under-voltage protection circuit with leakage protection | |
| CN202678082U (en) | Electronic transformer collector with overcurrent and overvoltage prevention function | |
| CN208241303U (en) | Three pole on-off leakage protecting plug of intelligent control type | |
| CN211790721U (en) | Self-recovery type over-voltage and under-voltage protection circuit with leakage protection | |
| CN203932967U (en) | A kind of coil controller | |
| CN203205831U (en) | Voltage monitoring protection circuit | |
| CN201210560Y (en) | Multifunctional energy saving socket | |
| CN212875684U (en) | High-frequency interference preventing self-recovery overvoltage and undervoltage protector circuit | |
| CN204633590U (en) | The soft starting circuit of the source of welding current | |
| CN216794605U (en) | Over-voltage and under-voltage protection circuit | |
| CN216774266U (en) | Take surge protector isolated plant of excessive pressure function | |
| CN220358806U (en) | Self-recovery overvoltage and undervoltage protector power supply circuit and protector circuit | |
| CN215498234U (en) | Single-phase under-voltage protection ware circuit of crossing of improvement type | |
| CN209434865U (en) | Self-recovering type overvoltage-undervoltage protector | |
| CN201466372U (en) | Novel power-saving protecting control socket | |
| CN219287389U (en) | Compatible high-power demagnetizing power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |