CN108803758A - High voltage supply system for residual current detection - Google Patents
High voltage supply system for residual current detection Download PDFInfo
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- CN108803758A CN108803758A CN201810798691.2A CN201810798691A CN108803758A CN 108803758 A CN108803758 A CN 108803758A CN 201810798691 A CN201810798691 A CN 201810798691A CN 108803758 A CN108803758 A CN 108803758A
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- Prior art keywords
- circuit
- detection
- resistance
- residual current
- high voltage
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- 238000001514 detection method Methods 0.000 title claims abstract description 73
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 5
- 230000005611 electricity Effects 0.000 claims description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- 239000010703 silicon Substances 0.000 claims description 9
- 238000013461 design Methods 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/461—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using an operational amplifier as final control device
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/468—Regulating voltage or current wherein the variable actually regulated by the final control device is dc characterised by reference voltage circuitry, e.g. soft start, remote shutdown
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention provides a kind of high voltage supply systems for residual current detection, including rectification circuit, high-voltage starting circuit, detection circuit and driving circuit, rectification circuit input end accesses AC voltages and to AC voltage commutation, and rectification circuit output end connects high-voltage starting circuit；High-voltage starting circuit forms burning voltage, and provide burning voltage to detection circuit and driving circuit to the high voltage stabilizing after rectifier circuit rectifies.Structure of the invention exquisiteness, reasonable design and cost are relatively low；The present invention is applied widely, directly by high pressure is supplied to start-up circuit, and start-up circuit generates burning voltage, greatly reduces system power dissipation；The present invention is directly powered by depletion type NMOSFET transistors M1, and the stable power-supplying to internal detection circuitry is realized by LDO.
Description
Technical field
The present invention relates to circuit detection fields, and in particular, to is used for the high voltage supply system of residual current detection.
Background technology
In the application of traditional residual current detecting, the power supply mode of detection circuit is typically that AC voltages pass through all-wave or half
After wave rectifier bridge, by a high voltage startup resistance, filter capacitor and voltage stabilizing/clamp circuit constitute power supply system, to inspection
Slowdown monitoring circuit provides a stable power supply.But a main problem existing for traditional structure is, in different application scenario AC
Voltage (virtual value) range has higher requirement for the design of start-up resistor and regulator circuit in this way from 36V-300V：Electricity
It hinders excessive, can cause compared under low AC voltages, regulator circuit can not provide enough voltage and cause detection circuit normal
Work；Resistance is too small, can cause under higher AC voltages, and start-up resistor can not only consume the power more crossed, while can also lead
Cause start-up resistor and the excessively high initiation integrity problem of regulator circuit temperature.Regulator circuit and start-up resistor usually require largely simultaneously
Resolution element causes system cost and volume to rise.
Invention content
For the defects in the prior art, the object of the present invention is to provide a kind of high voltage supplies for residual current detection
System.
According to a kind of high voltage supply system for residual current detection provided by the invention, including rectification circuit, high pressure
Start-up circuit, detection circuit and driving circuit, wherein：
Rectification circuit input end accesses AC voltages and to AC voltage commutation, and rectification circuit output end connects high voltage startup electricity
Road；
High-voltage starting circuit forms burning voltage to the high voltage stabilizing after rectifier circuit rectifies, and provide burning voltage to
Detection circuit and driving circuit.
Preferably, the rectification circuit includes rectifier bridge.
Preferably, input is terminated with varistor between two of the rectifier bridge.
Preferably, the high-voltage starting circuit includes depletion type NMOSFET transistors M1, detection resistance R1, detection resistance
R2, control circuit and linear voltage regulator, wherein：
Depletion type NMOSFET transistors M1 drain electrode access rectification circuit output ends, depletion type NMOSFET transistor M1 grids
Control circuit output end is connected, the source electrode connecting detection one end resistance R1 transistor M1 depletion type NMOSFET and linear voltage regulator are defeated
Enter end；
The one end detection resistance R1 other end connecting detection resistance R2, detection resistance R2 other ends ground connection；
Node between detection resistance R1 and detection resistance R2 connects control circuit input terminal.
Preferably, the control circuit includes amplifier.
Preferably, the detection circuit internal detection circuitry and outer detecting circuit, the external inspection of internal detection circuitry connection
Slowdown monitoring circuit, outer detecting circuit include residual current transformer, diode D6, diode D7, resistance RX, resistance RINAnd capacitance
CIN, wherein：
AC circuits run through residual current transformer；
Residual current transformer one end connects resistance RINOne end, resistance RXOne end, diode D6 cathode and diode D7
Anode；
The residual current transformer other end connects capacitance CINOne end, resistance RXThe other end, diode D6 anodes and two poles
Pipe D7 cathode；
Capacitance CINThe other end connects resistance RINThe other end.
Preferably, further include silicon-controlled D5 and capacitance COS, wherein：
Silicon-controlled D5 anodes connect rectification circuit output end, and silicon-controlled D5 cathode ground connection, SCR control end connects capacitance
COSOne end and driving circuit, capacitance COSThe other end ground connection.
Preferably, further include tripping coil, the tripping coil is set between AC circuits and rectification circuit, tripping coil
Break-make for controlling AC circuits.
Compared with prior art, the present invention has following advantageous effect：
1, structure of the invention exquisiteness, reasonable design and cost are relatively low；
2, the present invention is applied widely, directly by high pressure is supplied to start-up circuit, and start-up circuit generates burning voltage, greatly
Reduce system power dissipation greatly；
3, the present invention is directly powered by depletion type NMOSFET transistors M1, is realized to inside detection electricity by LDO
The stable power-supplying on road.
Description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is traditional residual current detection circuit power supply system figure；
Fig. 2 is the circuit diagram provided by the present invention for the high voltage supply system of residual current detection；
Fig. 3 is the circuit diagram provided by the present invention for the start-up circuit of the high voltage supply system of residual current detection；
Fig. 4 is the specific implementation electricity provided by the present invention for the start-up circuit of the high voltage supply system of residual current detection
Lu Tu.
Specific implementation mode
With reference to specific embodiment, the present invention is described in detail.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention
Protection domain.
In the application of traditional residual current detecting, the power supply mode of detection circuit is typically that AC voltages pass through all-wave or half
After wave rectifier bridge, by a high voltage startup resistance, filter capacitor and voltage stabilizing/clamp circuit constitute power supply system, to inspection
Slowdown monitoring circuit provides a stable power supply, as shown in Figure 1.But a main problem existing for traditional structure is, different
Application scenario AC voltages (virtual value) range in this way has the design of start-up resistor and regulator circuit higher from 36V-300V
Requirement：Resistance is excessive, can cause compared under low AC voltages, regulator circuit can not provide enough voltage and lead to detection circuit
Cisco unity malfunction；Resistance is too small, can cause under higher AC voltages, and start-up resistor can not only consume the power more crossed, together
When also result in start-up resistor and the excessively high initiation integrity problem of regulator circuit temperature.Regulator circuit and start-up resistor are usual simultaneously
A large amount of resolution elements are needed, system cost and volume is caused to rise.
Therefore, the present invention provides a kind of new high voltage supply systems for residual current detection, such as Fig. 2 to Fig. 4 institutes
Show, removes clamper/regulator circuit in conventional method and corresponding peripheral original paper.AC voltages are supplied directly to after over commutation
Without any peripheral original paper, directly it is supplied to high-voltage starting circuit, high-voltage starting circuit to pass through depletion type by high pressure IO
NMOSFET transistors M1 generates a stable voltage and is supplied to internal detection circuitry and driving circuit, to utmostly
Upper reduction system power dissipation and cost.The concrete structure of the high voltage supply system of the present invention is as follows：
The present invention includes rectification circuit, integrated chip and outer detecting circuit, and rectification circuit accesses integrated chip, integrates
Chip connects outer detecting circuit, and the integrated chip includes high-voltage starting circuit, driving circuit and internal detection circuitry, institute
High-voltage starting circuit input terminal connection rectification circuit is stated, high-voltage starting circuit output end connects driving circuit and internal detection electricity
Road, internal detection circuitry connect outer detecting circuit, and driving circuit is circumscribed with capacitance and diode, due to internal detection circuitry and
Driving circuit is this field custom circuit, and this patent is no longer specifically unfolded.
Further, the rectification circuit is rectifier bridge structure, and rectification as shown in Figure 2 is made up of diode D1-D4
The input terminal of bridge, rectifier bridge accesses AC circuits, and the output end of rectifier bridge connects high-voltage starting circuit, more specifically, rectifier bridge
It is connected to varistor MOV between two input terminals, for protecting rectifier bridge, rectifier bridge to control its break-make by tripping coil L1.
In more detail, the high-voltage starting circuit includes depletion type NMOSFET transistors M1, detection resistance R1, detection
Resistance R2, control circuit and linear voltage regulator LDO, wherein：Detection resistance R1, detection resistance R2 are for monitoring output voltage
VDDH, and send testing result Vsense in control circuit, control circuit can be according to the Vsense voltages and reference monitored
Relationship between voltage Vref generates the grid voltage Vgate of control M1, wherein：Grid voltage Vgate and output voltage
The pressure difference control final burning voltages of Vsense between VDDH are equal to reference voltage Vref；The M1 leakages of depletion type NMOSFET transistors
Rectification circuit output end is accessed in pole, and depletion type NMOSFET transistor M1 grids connect control circuit output end, depletion type
The source electrode connecting detection one end resistance R1 transistor M1 NMOSFET and linear voltage regulator LDO input terminals；The detection resistance R1 other ends connect
Connect the one end detection resistance R2, detection resistance R2 other ends ground connection；Node connection control between detection resistance R1 and detection resistance R2
Circuit input end processed, the control circuit include amplifier.
Further, the outer detecting circuit includes residual current transformer ZCT, diode D6, diode D7, electricity
Hinder RX, resistance RINAnd capacitance CIN, wherein：AC circuits run through residual current transformer；The one end residual current transformer ZCT connects
Connecting resistance RINOne end, resistance RXOne end, diode D6 cathode and diode D7 anodes；The residual current transformer ZCT other ends
Connect capacitance CINOne end, resistance RXThe other end, diode D6 anodes and diode D7 cathode；Capacitance CINOther end connection electricity
Hinder RINThe other end, resistance RINThe other end, resistance RXThe other end is respectively connected to internal detection circuitry.
In more detail, further include silicon-controlled D5 and capacitance COS, silicon-controlled D5 anodes connection rectification circuit output end, controllably
Silicon D5 cathode are grounded, and SCR control end connects capacitance COSOne end and driving circuit, capacitance COSThe other end ground connection.
According to a particular embodiment of the invention, as shown in figure 4, the pressure resistance of the depletion type NMOSFET transistors M1 of the present invention
Pressure resistance for 700V, triode M2 is 12V, and resistor network R3 and R4 close the border depletion type NMOSFET transistors M1's for setting
Threshold voltage.It is directly connected to high pressure by the drain of depletion type NMOSFET transistors M1, a voltage is generated by control circuit
The grid of depletion type MOS FET is controlled, a stable voltage 12V is generated.Due to there is no capacitance after rectifier bridge, in M troughs
It will appear the case where rectified voltage is less than 12V when bottom, 12V can be caused to generate fluctuation at the lowest point, therefore increasing level-one LDO
12V is transformed into 5V, this 5V voltage is the work of stabilization, and internal detection circuitry is supplied to power.Pass through two-stage in this way
LDO structures provide a stable 5V voltages to internal detection circuitry.
When Vsense is higher than Vref, represents VDDH and be higher than setting value, the output of comparator is height, and triode M2 is opened
(triode M2 is the common NMOS of pressure resistance 12V), Vgate voltages are less than the threshold voltage control of depletion type NMOSFET transistors M1
M1 processed is closed the border, and Vgate voltages are set by the ratio of R3 and R4.Conversely, when Vsense is less than Vref, depletion type NMOSFET is brilliant
Body pipe M1 is opened.So final stable state when, VDDH is close to setting value.Wherein：VDDH is：
The present invention is directly powered by depletion type NMOSFET transistors M1, is realized to internal detection circuitry by LDO
Stable power-supplying.It should be noted that 12V and 5V provided by the invention are specific implementation data, practical application includes not
It is defined in specific voltage.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or change within the scope of the claims, this not shadow
Ring the substantive content of the present invention.In the absence of conflict, the feature in embodiments herein and embodiment can arbitrary phase
Mutually combination.
Claims (8)
1. a kind of high voltage supply system for residual current detection, which is characterized in that including rectification circuit, high voltage startup electricity
Road, detection circuit and driving circuit, wherein：
Rectification circuit input end accesses AC voltages and to AC voltage commutation, and rectification circuit output end connects high-voltage starting circuit；
High-voltage starting circuit forms burning voltage, and provide burning voltage to detection to the high voltage stabilizing after rectifier circuit rectifies
Circuit and driving circuit.
2. the high voltage supply system according to claim 1 for residual current detection, which is characterized in that the rectified current
Road includes rectifier bridge.
3. the high voltage supply system according to claim 1 for residual current detection, which is characterized in that the rectifier bridge
Two between input be terminated with varistor.
4. the high voltage supply system according to claim 1 for residual current detection, which is characterized in that the high pressure opens
Dynamic circuit includes depletion type NMOSFET transistors M1, detection resistance R1, detection resistance R2, control circuit and linear voltage regulator,
Wherein：
Depletion type NMOSFET transistors M1 drain electrode access rectification circuit output ends, the connection of depletion type NMOSFET transistor M1 grids
Control circuit output end, the source electrode connecting detection one end resistance R1 transistor M1 depletion type NMOSFET and linear voltage regulator input terminal；
The one end detection resistance R1 other end connecting detection resistance R2, detection resistance R2 other ends ground connection；
Node between detection resistance R1 and detection resistance R2 connects control circuit input terminal.
5. the high voltage supply system according to claim 4 for residual current detection, which is characterized in that the control electricity
Road includes amplifier.
6. the high voltage supply system according to claim 1 for residual current detection, which is characterized in that the detection electricity
Road internal detection circuitry and outer detecting circuit, internal detection circuitry connect outer detecting circuit, and outer detecting circuit includes surplus
Aftercurrent mutual inductor, diode D6, diode D7, resistance RX, resistance RINAnd capacitance CIN, wherein：
AC circuits run through residual current transformer；
Residual current transformer one end connects resistance RINOne end, resistance RXOne end, diode D6 cathode and diode D7 anodes；
The residual current transformer other end connects capacitance CINOne end, resistance RXThe other end, diode D6 anodes and diode D7
Cathode；
Capacitance CINThe other end connects resistance RINThe other end.
7. the high voltage supply system according to claim 1 for residual current detection, which is characterized in that further include controllable
Silicon D5 and capacitance COS, wherein：
Silicon-controlled D5 anodes connect rectification circuit output end, and silicon-controlled D5 cathode ground connection, SCR control end connects capacitance COS's
One end and driving circuit, capacitance COSThe other end ground connection.
8. the high voltage supply system according to claim 1 for residual current detection, which is characterized in that further include threading off
Coil, the tripping coil are set between AC circuits and rectification circuit, and tripping coil is used to control the break-make of AC circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810798691.2A CN108803758A (en) | 2018-07-19 | 2018-07-19 | High voltage supply system for residual current detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810798691.2A CN108803758A (en) | 2018-07-19 | 2018-07-19 | High voltage supply system for residual current detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108803758A true CN108803758A (en) | 2018-11-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810798691.2A Pending CN108803758A (en) | 2018-07-19 | 2018-07-19 | High voltage supply system for residual current detection |
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| Country | Link |
|---|---|
| CN (1) | CN108803758A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112071722A (en) * | 2020-08-11 | 2020-12-11 | 上海谷为电子科技有限公司 | Release control system and method suitable for residual current detection/protection field |
| CN112103913A (en) * | 2020-09-16 | 2020-12-18 | 上海谷为电子科技有限公司 | A-type leakage protection chip |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1107415A2 (en) * | 1999-11-30 | 2001-06-13 | GE Clipsal China Company, Ltd. | Residual current breaker |
| CN204809859U (en) * | 2015-07-30 | 2015-11-25 | 杭州乾龙电器有限公司 | Residual current operated protec tive device lacks zero protection circuit |
| CN106132050A (en) * | 2016-08-31 | 2016-11-16 | 浙江德菱科技股份有限公司 | Intelligent road-lamp with residual current protecting controls chopper |
| CN208737332U (en) * | 2018-07-19 | 2019-04-12 | 上海谷为电子科技有限公司 | High voltage supply system for residual current detection |
-
2018
- 2018-07-19 CN CN201810798691.2A patent/CN108803758A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1107415A2 (en) * | 1999-11-30 | 2001-06-13 | GE Clipsal China Company, Ltd. | Residual current breaker |
| CN204809859U (en) * | 2015-07-30 | 2015-11-25 | 杭州乾龙电器有限公司 | Residual current operated protec tive device lacks zero protection circuit |
| CN106132050A (en) * | 2016-08-31 | 2016-11-16 | 浙江德菱科技股份有限公司 | Intelligent road-lamp with residual current protecting controls chopper |
| CN208737332U (en) * | 2018-07-19 | 2019-04-12 | 上海谷为电子科技有限公司 | High voltage supply system for residual current detection |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112071722A (en) * | 2020-08-11 | 2020-12-11 | 上海谷为电子科技有限公司 | Release control system and method suitable for residual current detection/protection field |
| CN112103913A (en) * | 2020-09-16 | 2020-12-18 | 上海谷为电子科技有限公司 | A-type leakage protection chip |
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