CN109617011A - One kind having earth leakage protective high voltage direct current solid-state relay circuit - Google Patents
One kind having earth leakage protective high voltage direct current solid-state relay circuit Download PDFInfo
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- CN109617011A CN109617011A CN201811444609.2A CN201811444609A CN109617011A CN 109617011 A CN109617011 A CN 109617011A CN 201811444609 A CN201811444609 A CN 201811444609A CN 109617011 A CN109617011 A CN 109617011A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
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Abstract
The present invention relates to one kind to have earth leakage protective high voltage direct current solid-state relay circuit, and the high voltage direct current suitable for requiring creepage protection function is powered or the application of the noncontacting switch control driving circuit.Circuit of the present invention includes light every formula direct current IGBT switching circuit, DC leakage telemetry circuit.Specifically include optocoupler IC1, comparator IC2, residual current sensor SC1, driving triode VT1, constant current triode VT2, IGBT pipe VT3, thyristor VT4, voltage-stabiliser tube DW1, diode D1, electric capacity of voltage regulation C1, protection capacitor C2, driving resistance R1, constant current resistance R2 etc..Ball bearing made scheme of the present invention based on IBGT pipe, inverse-impedance type thyristor, residual current sensor, comparator etc. can fully meet and carry out reliable real-time guard requirement to the leakage current failure in high voltage direct current solid-state relay circuit.The circuit is simple, at low cost, high reliablity, versatility are good, is easy to commercialization.
Description
Technical field
The invention belongs to industrial measurement and control fields, are related to a kind of circuit, in particular to a kind of to have earth leakage protective high straightening
Solid-state relay circuit is flowed, it is contactless suitable for the high voltage direct current power supply or driving circuit that require creepage protection function
The application of switch control.
Background technique
Non-contact type solid-state relay has many advantages, such as that no mechanical contact, response is rapid, the service life is long and obtains day due to it
Benefit is widely applied.Especially requires higher and higher to earth leakage protective, work as generation with driving circuit in high voltage direct current power supply
It requires to carry out safeguard protection when DC leakage in time to avoid that personal safety accident occurs, the real-time of protection act is wanted
Ask high.But still lack using IGBT as the high voltage direct current solid-state relay of power control device has reliable earth leakage protective function at present
The product of energy.Therefore, how to design a kind of can leak electricity to high voltage direct current in time, reliably protect, and circuit is simple, is easy to
The high voltage direct current solid-state relay scheme of commercialization, is starting point of the invention.
Summary of the invention
The purpose of the present invention is in view of the deficienciess of the prior art, proposing a kind of solid with earth leakage protective high voltage direct current
State relay circuit.The circuit is made of light every formula direct current IGBT drive circuit, DC leakage telemetry circuit, and core is with one
IGBT is power control device, configures leakage current sensor, and is protection control device with inverse-impedance type thyristor, which exists
Shutdown protection can be reliably carried out when leaking electricity.
Circuit of the present invention includes light every formula direct current IGBT drive circuit, DC leakage telemetry circuit.
Light includes optocoupler IC1, driving triode VT1, constant current triode VT2, IGBT pipe every formula direct current IGBT switching circuit
VT3, voltage-stabiliser tube DW1, electric capacity of voltage regulation C1, protection capacitor C2, driving resistance R1, constant current resistance R2, upper divider resistance R3, lower partial pressure
Resistance R4, voltage regulation resistance R5, protective resistance R6, load Load, positive one end for driving end IN+ and driving resistance R1, optocoupler IC1 are sent out
The anode of light pipe connects, and drives the collector of the other end of resistance R1 and the base stage of driving triode VT1, constant current triode VT2
Connection, the cathode of optocoupler IC1 luminous tube are connect with the collector of driving triode VT1, the emitter-base bandgap grading of driving triode VT1 and constant current
The emitter-base bandgap grading of one end connection of the base stage of triode VT2, constant current resistance R2, the other end of constant current resistance R2 and constant current triode VT2,
The connection of the negative driving end end IN-, the output collector of optocoupler IC1 and the one end voltage regulation resistance R5, the cathode of voltage-stabiliser tube DW1, pressure stabilizing electricity
The cathode of one end of appearance C1, the connection of the accessory power supply end end+E1, the voltage regulation resistance R5 other end and diode D1 are loading Load just
End+end is connect after being connected and through the detection hole of residual current sensor CS1 with the auxiliary load supplying end end+E of circuit, optocoupler IC1
Output emitter-base bandgap grading connect with one end of upper divider resistance R3, one end of the other end of upper divider resistance R3 and lower divider resistance R4,
The anode connection of the grid, thyristor VT4 of IGBT pipe VT3, the drain electrode of IGBT pipe VT3 and one end, the diode of protective resistance R6
The anode of D1, the negative terminal-end connection for loading Load, the other end of protective resistance R6 are connect with one end of protection capacitor C2, and lower point
The other end of piezoresistance R4, the anode of voltage-stabiliser tube DW1, the other end of electric capacity of voltage regulation C1, the cathode of thyristor VT4, IGBT pipe VT3
Source electrode, protect the other end of capacitor C2 to both pass through the detection hole of residual current sensor CS1 after be grounded；
DC leakage telemetry circuit include residual current sensor SC1, comparator IC2, thyristor VT4, gate electrode resistance R7,
Stagnant loop resistance R8, pull-up resistor R9, filter resistance R10, anode resistance R11, negative terminal resistance R12, biased resistance R13, it is lower partially
The end feeder ear VCC of piezoresistance R14, filter capacitor C3, residual current sensor SC1 are connect with the accessory power supply end end+E1, electric current
The end ground terminal GND of sensor SC1 is grounded, and the output end OUT terminal of current sensor SC1 is connect with one end of filter resistance R10, is filtered
The other end of wave resistance R10 is connect with one end of one end of filter capacitor C3, anode resistance R11, the other end of filter capacitor C3
Ground connection, the other end of anode resistance R11 are connect with the end positive input terminal I+ of one end of stagnant loop resistance R8, comparator IC2, stagnant ring electricity
The other end of resistance R8 is connect with one end of the output end OUT terminal of comparator IC2, one end of gate electrode resistance R7, pull-up resistor R9, door
The other end of electrode resistance R7 is connect with the gate pole of thyristor VT4, and the end negative input end I- of comparator IC2 is with negative terminal resistance R12's
One end connection, the other end of negative terminal resistance R12 are connect with one end of one end of biased resistance R13, lower bias resistance R14, on
The other end of bias resistance R13 is connect with the accessory power supply end end+E1, the other end ground connection of lower bias resistance R14, comparator IC2
The end positive power source terminal V+ connect with the other end of the accessory power supply end end+E1, pull-up resistor R9, the ground terminal GND of comparator IC2 termination
Ground.
Beneficial effects of the present invention are as follows:
Ball bearing made of the present invention based on IBGT pipe, inverse-impedance type thyristor, residual current sensor, voltage comparator etc.
Scheme can fully meet and want to the reliable real-time guard of leakage current failure progress in high voltage direct current solid-state relay circuit
It asks.The circuit is simple, at low cost, high reliablity, versatility are good, is easy to commercialization.
Detailed description of the invention
Fig. 1 is circuit diagram of the invention.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
As shown in Figure 1, a kind of have earth leakage protective high voltage direct current solid-state relay circuit, including light is every formula direct current IGBT
Driving circuit, DC leakage telemetry circuit.
Light includes optocoupler IC1, driving triode VT1, constant current triode VT2, IGBT pipe every formula direct current IGBT switching circuit
VT3, voltage-stabiliser tube DW1, electric capacity of voltage regulation C1, protection capacitor C2, driving resistance R1, constant current resistance R2, upper divider resistance R3, lower partial pressure
Resistance R4, voltage regulation resistance R5, protective resistance R6, load Load, positive one end for driving end IN+ and driving resistance R1, optocoupler IC1 are sent out
The anode of light pipe connects, and drives the collector of the other end of resistance R1 and the base stage of driving triode VT1, constant current triode VT2
Connection, the cathode of optocoupler IC1 luminous tube are connect with the collector of driving triode VT1, the emitter-base bandgap grading of driving triode VT1 and constant current
The emitter-base bandgap grading of one end connection of the base stage of triode VT2, constant current resistance R2, the other end of constant current resistance R2 and constant current triode VT2,
The connection of the negative driving end end IN-, the output collector of optocoupler IC1 and the one end voltage regulation resistance R5, the cathode of voltage-stabiliser tube DW1, pressure stabilizing electricity
The cathode of one end of appearance C1, the connection of the accessory power supply end end+E1, the voltage regulation resistance R5 other end and diode D1 are loading Load just
End+end is connect after being connected and through the detection hole of residual current sensor CS1 with the auxiliary load supplying end end+E of circuit, optocoupler IC1
Output emitter-base bandgap grading connect with one end of upper divider resistance R3, one end of the other end of upper divider resistance R3 and lower divider resistance R4,
The anode connection of the grid, thyristor VT4 of IGBT pipe VT3, the drain electrode of IGBT pipe VT3 and one end, the diode of protective resistance R6
The anode of D1, the negative terminal-end connection for loading Load, the other end of protective resistance R6 are connect with one end of protection capacitor C2, and lower point
The other end of piezoresistance R4, the anode of voltage-stabiliser tube DW1, the other end of electric capacity of voltage regulation C1, the cathode of thyristor VT4, IGBT pipe VT3
Source electrode, protect the other end of capacitor C2 to both pass through the detection hole of residual current sensor CS1 after be grounded；
DC leakage telemetry circuit include residual current sensor SC1, comparator IC2, thyristor VT4, gate electrode resistance R7,
Stagnant loop resistance R8, pull-up resistor R9, filter resistance R10, anode resistance R11, negative terminal resistance R12, biased resistance R13, it is lower partially
The end feeder ear VCC of piezoresistance R14, filter capacitor C3, residual current sensor SC1 are connect with the accessory power supply end end+E1, electric current
The end ground terminal GND of sensor SC1 is grounded, and the output end OUT terminal of current sensor SC1 is connect with one end of filter resistance R10, is filtered
The other end of wave resistance R10 is connect with one end of one end of filter capacitor C3, anode resistance R11, the other end of filter capacitor C3
Ground connection, the other end of anode resistance R11 are connect with the end positive input terminal I+ of one end of stagnant loop resistance R8, comparator IC2, stagnant ring electricity
The other end of resistance R8 is connect with one end of the output end OUT terminal of comparator IC2, one end of gate electrode resistance R7, pull-up resistor R9, door
The other end of electrode resistance R7 is connect with the gate pole of thyristor VT4, and the end negative input end I- of comparator IC2 is with negative terminal resistance R12's
One end connection, the other end of negative terminal resistance R12 are connect with one end of one end of biased resistance R13, lower bias resistance R14, on
The other end of bias resistance R13 is connect with the accessory power supply end end+E1, the other end ground connection of lower bias resistance R14, comparator IC2
The end positive power source terminal V+ connect with the other end of the accessory power supply end end+E1, pull-up resistor R9, the ground terminal GND of comparator IC2 termination
Ground.
Used in the present invention includes optocoupler IC1, comparator IC2, driving triode VT1, constant current triode VT2, IBGT
All devices including pipe VT3, thyristor VT4, residual current sensor SC1 etc. are all made of existing matured product, Ke Yitong
Cross market acquirement.Such as: optocoupler uses 6N136, and comparator uses LM311, and triode uses C9014, and IBGT pipe uses IRG system
IBGT pipe is arranged, thyristor uses KK1-2 high speed thyristor, and residual current sensor is using AHKC potline current sensor etc..
Main circuit parameter matching relationship in the present invention is as follows:
If: the output signal of residual current sensor SC1 is ui=ui0+kiI0, ui0、uimRespectively zero current signal and permit
Perhaps spiking output (unit: V), I0、I0mFor tested leakage current and its maximum value (unit: A) of permission, kiTo become
Change coefficient (unit: V/A), E1To assist supply voltage (unit: V), optocoupler emission side electric current is IF(unit: A).
R in formula2For the resistance value (unit: Ω) of constant current resistance R2, R8、R10、R11、R13、R14Respectively stagnant loop resistance R8,
The resistance value (unit: Ω) of filter resistance R10, anode resistance R11, biased resistance R13, lower bias resistance R14.
The course of work of the present invention is as follows:
(1) to the isolation drive control action of DC load: circuit of the present invention has the function of Phototube Coupling, optocoupler IC1's
Light emitting control side is the constant-current circuit of Width funtion driving, according to emission side electric current IF, constant current resistance R2 is configured by formula (1).The electricity
The anode of the positive driving end IN+ termination driving voltage on road, bears the negative terminal of driving end IN- termination driving voltage.In being normally applied,
The driving end end IN- opening as higher level's control circuit can be born in the supply voltage end of positive driving end IN+ termination higher level's control circuit
Control terminal is closed, then, optocoupler is connected when which is high level, and then makes IGBT pipe that powering load be connected；The control terminal is
Optocoupler turns off when low level, and then the shutdown of IGBT pipe is made to make load power down.The drive control power supply of IBGT is by voltage regulation resistance R5, steady
The accessory power supply of pressure pipe WD1, electric capacity of voltage regulation C1 composition, voltage are+E1.
(2) leakage protection: using the leakage current in residual current sensor SC1 real-time monitoring circuit, once it finds
Reach the maximum value I of permission up to electric current0m, then under the circuit parameter cooperation of formula (2), formula (3), comparator IC2 exports high electricity
It is flat that thyristor VT4 is connected, force IBGT pipe to turn off, and after shutdown before no progress power-off restarting work, IBGT is managed always
It is held off, to can reliably and securely realize protection control action to DC leakage current.
Claims (2)
1. one kind has an earth leakage protective high voltage direct current solid-state relay circuit, including light is every formula direct current IGBT switching circuit, straight
Stream electric leakage telemetry circuit, it is characterised in that:
Light every formula direct current IGBT switching circuit include optocoupler IC1, driving triode VT1, constant current triode VT2, IGBT pipe VT3,
Voltage-stabiliser tube DW1, electric capacity of voltage regulation C1, protection capacitor C2, driving resistance R1, constant current resistance R2, upper divider resistance R3, lower divider resistance
R4, voltage regulation resistance R5, protective resistance R6, load Load, positive one end for driving end IN+ and driving resistance R1, optocoupler IC1 luminous tube
Anode connection, driving resistance R1 the other end connect with the collector of the base stage of driving triode VT1, constant current triode VT2,
The cathode of optocoupler IC1 luminous tube is connect with the collector of driving triode VT1, the emitter-base bandgap grading of driving triode VT1 and three pole of constant current
One end connection of the base stage, constant current resistance R2 of pipe VT2, emitter-base bandgap grading, the negative drive of the other end and constant current triode VT2 of constant current resistance R2
The connection of the moved end end IN-, the output collector and the one end voltage regulation resistance R5, the cathode of voltage-stabiliser tube DW1, electric capacity of voltage regulation C1 of optocoupler IC1
One end, the connection of the accessory power supply end end+E1, the cathode of the voltage regulation resistance R5 other end and diode D1, the anode+end for loading Load
It is connect after being connected and through the detection hole of residual current sensor CS1 with the auxiliary load supplying end end+E of circuit, the output of optocoupler IC1
Emitter-base bandgap grading is connect with one end of upper divider resistance R3, and one end of the other end of upper divider resistance R3 and lower divider resistance R4, IGBT are managed
The anode connection of the grid, thyristor VT4 of VT3, drain electrode and one end of protective resistance R6, the sun of diode D1 of IGBT pipe VT3
Pole, the negative terminal-end connection for loading Load, the other end of protective resistance R6 are connect with one end of protection capacitor C2, lower divider resistance
The source of the other end of R4, the anode of voltage-stabiliser tube DW1, the other end of electric capacity of voltage regulation C1, the cathode of thyristor VT4, IGBT pipe VT3
Pole is grounded after protecting the other end of capacitor C2 to both pass through the detection hole of residual current sensor CS1；
DC leakage telemetry circuit includes residual current sensor SC1, comparator IC2, thyristor VT4, gate electrode resistance R7, stagnant ring
Resistance R8, pull-up resistor R9, filter resistance R10, anode resistance R11, negative terminal resistance R12, biased resistance R13, lower bias plasma
R14, filter capacitor C3 are hindered, the end feeder ear VCC of residual current sensor SC1 is connect with the accessory power supply end end+E1, current sense
The end ground terminal GND of device SC1 is grounded, and the output end OUT terminal of current sensor SC1 is connect with one end of filter resistance R10, filtered electrical
The other end of resistance R10 is connect with one end of one end of filter capacitor C3, anode resistance R11, the other end ground connection of filter capacitor C3,
The other end of anode resistance R11 is connect with the end positive input terminal I+ of one end of stagnant loop resistance R8, comparator IC2, stagnant loop resistance R8
The other end connect with one end of the output end OUT terminal of comparator IC2, one end of gate electrode resistance R7, pull-up resistor R9, gate pole electricity
The other end of resistance R7 is connect with the gate pole of thyristor VT4, the end negative input end I- of comparator IC2 and one end of negative terminal resistance R12
Connection, the other end of negative terminal resistance R12 are connect with one end of one end of biased resistance R13, lower bias resistance R14, biased
The other end of resistance R13 is connect with the accessory power supply end end+E1, and the other end ground connection of lower bias resistance R14, comparator IC2 is just
The end power end V+ is connect with the other end of the accessory power supply end end+E1, pull-up resistor R9, the end the ground terminal GND ground connection of comparator IC2.
2. according to claim 1 a kind of with earth leakage protective high voltage direct current solid-state relay circuit, it is characterised in that
Circuit parameter matching relationship is as follows:
If: the output signal of residual current sensor SC1 is ui=ui0+kiI0, ui0、uimRespectively zero current signal and permission
Spiking output, I0、I0mFor tested leakage current and its maximum value of permission, kiFor transformation coefficient, E1For accessory power supply electricity
Pressure, optocoupler emission side electric current are IF；
R in formula2For the resistance value of constant current resistance R2, R8、R10、R11、R13、R14Respectively stagnant loop resistance R8, filter resistance R10, just
Hold the resistance value of resistance R11, biased resistance R13, lower bias resistance R14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811444609.2A CN109617011B (en) | 2018-11-29 | 2018-11-29 | high-voltage direct-current solid-state relay circuit with leakage protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811444609.2A CN109617011B (en) | 2018-11-29 | 2018-11-29 | high-voltage direct-current solid-state relay circuit with leakage protection |
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| Publication Number | Publication Date |
|---|---|
| CN109617011A true CN109617011A (en) | 2019-04-12 |
| CN109617011B CN109617011B (en) | 2020-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811444609.2A Active CN109617011B (en) | 2018-11-29 | 2018-11-29 | high-voltage direct-current solid-state relay circuit with leakage protection |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110850314A (en) * | 2019-11-29 | 2020-02-28 | 湖南福德电气有限公司 | Charge-discharge test equipment with over-charge prevention structure |
| CN111969984A (en) * | 2020-08-11 | 2020-11-20 | 浙江世菱电力电子有限公司 | Direct-current contactless solid-state relay |
| CN115951207A (en) * | 2022-12-24 | 2023-04-11 | 北京市科通电子继电器总厂有限公司 | Test circuit and system of solid relay |
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| US20120069476A1 (en) * | 2010-08-10 | 2012-03-22 | Steve Fabian | Thermally protected resettable GFCI |
| CN102623947A (en) * | 2012-03-29 | 2012-08-01 | 临安亿安电力电子科技有限公司 | Leakage protector with phase line switching function |
| CN103956708A (en) * | 2014-04-21 | 2014-07-30 | 杭州电子科技大学 | Overload measurement and control circuit for low-voltage direct current load |
| CN107294061A (en) * | 2017-06-26 | 2017-10-24 | 北京无线电测量研究所 | A kind of guard method of high voltage power supply electric leakage and device |
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2018
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120069476A1 (en) * | 2010-08-10 | 2012-03-22 | Steve Fabian | Thermally protected resettable GFCI |
| CN102623947A (en) * | 2012-03-29 | 2012-08-01 | 临安亿安电力电子科技有限公司 | Leakage protector with phase line switching function |
| CN103956708A (en) * | 2014-04-21 | 2014-07-30 | 杭州电子科技大学 | Overload measurement and control circuit for low-voltage direct current load |
| CN107294061A (en) * | 2017-06-26 | 2017-10-24 | 北京无线电测量研究所 | A kind of guard method of high voltage power supply electric leakage and device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110850314A (en) * | 2019-11-29 | 2020-02-28 | 湖南福德电气有限公司 | Charge-discharge test equipment with over-charge prevention structure |
| CN111969984A (en) * | 2020-08-11 | 2020-11-20 | 浙江世菱电力电子有限公司 | Direct-current contactless solid-state relay |
| CN115951207A (en) * | 2022-12-24 | 2023-04-11 | 北京市科通电子继电器总厂有限公司 | Test circuit and system of solid relay |
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|---|---|
| CN109617011B (en) | 2020-01-31 |
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Effective date of registration: 20220112 Address after: 100071 805-1, 7 / F, 301, building 3-17, yard 1, Hangfeng Road, Fengtai District, Beijing Patentee after: Beijing Zhongzhi Zhongke Technology Development Co.,Ltd. Address before: 310018 No. 2 street, Xiasha Higher Education Zone, Hangzhou, Zhejiang Patentee before: HANGZHOU DIANZI University |