CN106802595A - A kind of relay module of high security - Google Patents
A kind of relay module of high security Download PDFInfo
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- CN106802595A CN106802595A CN201611205378.0A CN201611205378A CN106802595A CN 106802595 A CN106802595 A CN 106802595A CN 201611205378 A CN201611205378 A CN 201611205378A CN 106802595 A CN106802595 A CN 106802595A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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Abstract
A kind of relay module of high security, is related to relay module field；Including serial isolation bus module, microcontroller, input voltage linear optical coupling isolation detection module, gate-drive module, low-pass filtering module, comparator, amplifier, power MOSFET and four-wire system high side current detection resistance；Wherein relay module by high-precision current acquisition technique except that can detect the electric current in distribution line, with the situation of change of electric current in microcontroller analysis circuit, detection arc fault, so that switch-off power MOSFET in time, it is to avoid because arc burning and caused by loss；Also realize happy arc-detection and relay module recombination function；Electric current in distribution line is detected by high-precision current acquisition technique, with the situation of change of electric current in microcontroller analysis circuit, the different characteristic of arc current when real electric arc occurs is contrasted, detect arc fault, so as to timely switch-off power MOSFET, it is to avoid because arc burning and caused by loss.
Description
Technical field
The present invention relates to a kind of relay module field, the relay module of particularly a kind of high security.
Background technology
Relay module matches for various loads are provided as the core component in space industry distribution system with its demand
Power supply and power, and be responsible for power status detection, realize load connection, shut-off and protection control.Existing relay module
On-line reorganization can not be carried out for specific load, it is difficult to for load distribution provides accurate protection control, also without direct current
Arc is detected and defencive function, it is impossible to meet the use requirement under space environment.
The content of the invention
A kind of above-mentioned deficiency it is an object of the invention to overcome prior art, there is provided the relay module of high security, leads to
The electric current crossed in high accuracy current acquisition technology for detection distribution line, with the situation of change of electric current in microcontroller analysis circuit,
The different characteristic of arc current when real electric arc occurs is contrasted, arc fault is detected, so that switch-off power MOSFET in time, it is to avoid
Because of arc burning and caused by loss.
Above-mentioned purpose of the invention is achieved by following technical solution：
A kind of relay module of high security, including serial isolation bus module, microcontroller, input voltage linear optical coupling
Isolation detection module, gate-drive module, low-pass filtering module, comparator, amplifier, power MOSFET and four-wire system flash electricity
Stream detection resistance；
Input voltage linear optical coupling isolation detection module：After power supply circuit is powered, the voltage form simulation electricity of load is generated
Pressure signal, and voltage form analog voltage signal is sent to microcontroller；
Microcontroller：Receive the voltage form analog voltage signal that input voltage linear optical coupling isolation detection module is transmitted；
Voltage form analog voltage signal is sent to serial isolation bus module；Receive the TTL electricity that serial isolation bus module is transmitted
Flat closes the instruction of power MOSFET, and the instruction of the closing power MOSFET of Transistor-Transistor Logic level is sent to gate-drive module；
Receive the instruction for opening power MOSFET of the Transistor-Transistor Logic level that serial isolation bus module is transmitted, and by the opening power of Transistor-Transistor Logic level
The instruction of MOSFET is sent to gate-drive module；Receive the filtered current forms analog voltage that low-pass filtering module is transmitted
Signal；And send to serial isolation bus module filtered current forms analog voltage signal；Receive what comparator was transmitted
Interrupt signal, interrupt signal is sent to gate-drive module；
Serial isolation bus module：The voltage form analog voltage signal that microcontroller is transmitted is received, by voltage form mould
Intend voltage signal and be converted to the voltage form analog voltage signal of external bus level, and by the voltage form of external bus level
Analog voltage signal is sent to external control device；Receive the closing power of the external bus level that external control device is transmitted
The instruction of MOSFET；And the instruction of the closing power MOSFET of external bus level is converted to the closing power of Transistor-Transistor Logic level
The instruction of MOSFET, and the instruction of the closing power MOSFET of Transistor-Transistor Logic level is sent to microcontroller；Receive external control device
The instruction for opening power MOSFET of the external bus level for transmitting；And by the finger for opening power MOSFET of external bus level
Order is converted to the instruction for opening power MOSFET of Transistor-Transistor Logic level, and by the instruction of the opening power MOSFET of Transistor-Transistor Logic level send to
Microcontroller；The filtered current forms analog voltage signal that microcontroller is transmitted is received, by filtered current forms mould
Intend voltage signal and be converted to the current forms analog voltage signal of external bus level, and by the current forms of external bus level
Analog voltage signal is sent to external control device；
External control device：Receive the voltage form analog voltage of the external bus level that serial isolation bus module is transmitted
Signal, the voltage form analog voltage signal to outside bus level is monitored judgement, when voltage form analog voltage signal
Isolate bus mould to serial beyond the instruction for closing power MOSFET for when presetting voltage range, sending external bus level
Block；When voltage form analog voltage signal is when presetting in voltage range, the opening power of external bus level is sent
The instruction of MOSFET isolates bus module to serial；Receive the electric current shape of the external bus level that serial isolation bus module is transmitted
Formula analog voltage signal；
Gate-drive module：The instruction for closing power MOSFET of the Transistor-Transistor Logic level that microcontroller is transmitted is received, by TTL electricity
The flat instruction map for closing power MOSFET is the gate pole closing control signal of 12V, is sent to power MOSFET；Receive micro-control
The instruction for opening power MOSFET of the Transistor-Transistor Logic level that device processed is transmitted, the instruction map by the opening power MOSFET of Transistor-Transistor Logic level is
The gate pole of 12V opens control signal, sends to power MOSFET；The interrupt signal for transmitting volume that microcontroller is transmitted is received, will
Interrupt signal is converted into the interrupt signal of 12V, and the interrupt signal of 12V is sent to power MOSFET；
Power MOSFET：The gate pole closing control signal of the 12V that gate-drive module is transmitted is received, power MOSFET is closed
Close；The gate pole for receiving the 12V that gate-drive module is transmitted opens control signal, and power MOSFET is opened；Receive gate-drive mould
The interrupt signal of the 12V that block is transmitted, power MOSFET is closed；
Four-wire system high side current detection resistance：After power MOSFET is opened, the electric current of power supply circuit passes through four-wire system flash
Current sense resistor, produces resistive voltage, and resistive voltage is sent to amplifier；
Amplifier：The resistive voltage that four-wire system high side current detection resistance is transmitted is received, place is amplified to resistive voltage
Reason, the resistive voltage after generation hair is big, and will send out it is big after resistive voltage export to low-pass filtering module；
Low-pass filtering module：Resistive voltage after hair that reception amplifier is transmitted is big, is carried out to resistive voltage of the hair after big
Filtering process, generates filtered current forms analog voltage signal, and filtered current forms analog voltage signal is defeated
Go out to microcontroller；Filtered current forms analog voltage signal is exported to comparator simultaneously；
Comparator：Default excessively stream magnitude of voltage；Receive the filtered current forms analog voltage that low-pass filtering module is transmitted
Signal；Filtered current forms analog voltage signal and default excessively stream magnitude of voltage are compared, when filtered electric current shape
When formula analog voltage signal exceedes default excessively stream magnitude of voltage, interrupt signal to microcontroller is sent；When filtered current forms
When analog voltage signal is no more than default excessively stream magnitude of voltage, do not process；
Microcontroller：The analog voltage signal of receiving voltage and the analog voltage signal of electric current；Stored；When receiving
When the signal acquisition that external control device is sent is instructed, the analog voltage signal of output voltage and the analog voltage signal of electric current are extremely
External control device.
In a kind of relay module of above-mentioned high security, the relay module also include the first insulating power supply and second every
From power supply；
First insulating power supply：Output+5V power supplys are powered for input voltage linear optical coupling isolation detection module；
Second insulating power supply：Output+12V power supplys are gate-drive module for power supply；Output+3.3V power supplys are total for serial isolation
Wire module, microcontroller, low-pass filtering module, comparator and amplifier are powered.
In a kind of relay module of above-mentioned high security, the four-wire system high side current detection resistance includes detection electricity
Resistance, first resistor, first line, second resistance, the second circuit, the first measurement current circuit and the second measurement current circuit；Its
In, one end of detection resistance is connected with first line and the first measurement current circuit respectively；The first electricity is in series with first line
Resistance；The output end of the first measurement current circuit is connected with amplifier anode；The other end of detection resistance respectively with the second circuit and
Second measurement current circuit connection；Connected on second circuit second resistance；The output end and amplifier of the second measurement current circuit
Negative terminal is connected.
The present invention has the following advantages that compared with prior art：
(1) present invention uses electric current high-precision current acquisition technique to detect state current, improves power distribution protection
Accuracy；
(2) present invention have direct-current arc detection and defencive function, it is to avoid because arc burning and caused by harm；
(3) present invention uses reconfigurable design technology, and the protection of personalization is provided for different loads, improves the safety of distribution
Property.
Brief description of the drawings
Fig. 1 is relay module system schematic diagram of the present invention；
Fig. 2 is that four-wire system Precision measurement resistor current of the present invention detects circuit theory diagrams；
Fig. 3 is that direct-current arc of the present invention produces circuit theory diagrams；
Fig. 4 is the typical direct-current arc current waveform figure of the present invention.
Specific embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings：
The present invention is a kind of relay module of high security, is electrically isolation, front and rear part between its output and input
/ reciprocal influence is small, it is possible to achieve power switch control, power status monitoring, fault electric arc monitoring and defencive function,
Module recombination function.
It is as shown in Figure 1 relay module system schematic diagram, as seen from the figure, a kind of relay module of high security, including string
Row isolation bus module, microcontroller, input voltage linear optical coupling isolation detection module, gate-drive module, LPF mould
Block, comparator, amplifier, power MOSFET and four-wire system high side current detection resistance；
Input voltage linear optical coupling isolation detection module：After power supply circuit is powered, the voltage form simulation electricity of load is generated
Pressure signal, and voltage form analog voltage signal is sent to microcontroller；
Microcontroller：Receive the voltage form analog voltage signal that input voltage linear optical coupling isolation detection module is transmitted；
Voltage form analog voltage signal is sent to serial isolation bus module；Receive the TTL electricity that serial isolation bus module is transmitted
Flat closes the instruction of power MOSFET, and the instruction of the closing power MOSFET of Transistor-Transistor Logic level is sent to gate-drive module；
Receive the instruction for opening power MOSFET of the Transistor-Transistor Logic level that serial isolation bus module is transmitted, and by the opening power of Transistor-Transistor Logic level
The instruction of MOSFET is sent to gate-drive module；Receive the filtered current forms analog voltage that low-pass filtering module is transmitted
Signal；And send to serial isolation bus module filtered current forms analog voltage signal；Receive what comparator was transmitted
Interrupt signal, interrupt signal is sent to gate-drive module；
Serial isolation bus module：The voltage form analog voltage signal that microcontroller is transmitted is received, by voltage form mould
Intend voltage signal and be converted to the voltage form analog voltage signal of external bus level, and by the voltage form of external bus level
Analog voltage signal is sent to external control device；Receive the closing power of the external bus level that external control device is transmitted
The instruction of MOSFET；And the instruction of the closing power MOSFET of external bus level is converted to the closing power of Transistor-Transistor Logic level
The instruction of MOSFET, and the instruction of the closing power MOSFET of Transistor-Transistor Logic level is sent to microcontroller；Receive external control device
The instruction for opening power MOSFET of the external bus level for transmitting；And by the finger for opening power MOSFET of external bus level
Order is converted to the instruction for opening power MOSFET of Transistor-Transistor Logic level, and by the instruction of the opening power MOSFET of Transistor-Transistor Logic level send to
Microcontroller；The filtered current forms analog voltage signal that microcontroller is transmitted is received, by filtered current forms mould
Intend voltage signal and be converted to the current forms analog voltage signal of external bus level, and by the current forms of external bus level
Analog voltage signal is sent to external control device；
External control device：Receive the voltage form analog voltage of the external bus level that serial isolation bus module is transmitted
Signal, the voltage form analog voltage signal to outside bus level is monitored judgement, when voltage form analog voltage signal
Isolate bus mould to serial beyond the instruction for closing power MOSFET for when presetting voltage range, sending external bus level
Block；When voltage form analog voltage signal is when presetting in voltage range, the opening power of external bus level is sent
The instruction of MOSFET isolates bus module to serial；Receive the electric current shape of the external bus level that serial isolation bus module is transmitted
Formula analog voltage signal；
Gate-drive module：The instruction for closing power MOSFET of the Transistor-Transistor Logic level that microcontroller is transmitted is received, by TTL electricity
The flat instruction map for closing power MOSFET is the gate pole closing control signal of 12V, is sent to power MOSFET；Receive micro-control
The instruction for opening power MOSFET of the Transistor-Transistor Logic level that device processed is transmitted, the instruction map by the opening power MOSFET of Transistor-Transistor Logic level is
The gate pole of 12V opens control signal, sends to power MOSFET；The interrupt signal for transmitting volume that microcontroller is transmitted is received, will
Interrupt signal is converted into the interrupt signal of 12V, and the interrupt signal of 12V is sent to power MOSFET；
Power MOSFET：The gate pole closing control signal of the 12V that gate-drive module is transmitted is received, power MOSFET is closed
Close；The gate pole for receiving the 12V that gate-drive module is transmitted opens control signal, and power MOSFET is opened；Receive gate-drive mould
The interrupt signal of the 12V that block is transmitted, power MOSFET is closed；
Four-wire system high side current detection resistance：After power MOSFET is opened, the electric current of power supply circuit passes through four-wire system flash
Current sense resistor, produces resistive voltage, and resistive voltage is sent to amplifier；
Amplifier：The resistive voltage that four-wire system high side current detection resistance is transmitted is received, place is amplified to resistive voltage
Reason, the resistive voltage after generation hair is big, and will send out it is big after resistive voltage export to low-pass filtering module；
Low-pass filtering module：Resistive voltage after hair that reception amplifier is transmitted is big, is carried out to resistive voltage of the hair after big
Filtering process, generates filtered current forms analog voltage signal, and filtered current forms analog voltage signal is defeated
Go out to microcontroller；Filtered current forms analog voltage signal is exported to comparator simultaneously；
Comparator：Default excessively stream magnitude of voltage；Receive the filtered current forms analog voltage that low-pass filtering module is transmitted
Signal；Filtered current forms analog voltage signal and default excessively stream magnitude of voltage are compared, when filtered electric current shape
When formula analog voltage signal exceedes default excessively stream magnitude of voltage, interrupt signal to microcontroller is sent；When filtered current forms
When analog voltage signal is no more than default excessively stream magnitude of voltage, do not process；
Microcontroller：The analog voltage signal of receiving voltage and the analog voltage signal of electric current；Stored；When receiving
When the signal acquisition that external control device is sent is instructed, the analog voltage signal of output voltage and the analog voltage signal of electric current are extremely
External control device；
In addition, relay module also includes the first insulating power supply and the second insulating power supply；
First insulating power supply：Output+5V power supplys are powered for input voltage linear optical coupling isolation detection module；
Second insulating power supply：Output+12V power supplys are gate-drive module for power supply；Output+3.3V power supplys are total for serial isolation
Wire module, microcontroller, low-pass filtering module, comparator and amplifier are powered.
It is illustrated in figure 2 four-wire system Precision measurement resistor current detection circuit theory diagrams, as seen from the figure, four-wire system flash electricity
Stream detection resistance include detection resistance, first resistor, first line, second resistance, the second circuit, first measurement current circuit and
Second measurement current circuit；Wherein, one end of detection resistance is connected with first line and the first measurement current circuit respectively；First
First resistor is in series with circuit；The output end of the first measurement current circuit is connected with amplifier anode；Detection resistance it is another
End is connected with the second circuit and the second measurement current circuit respectively；Connected on second circuit second resistance；Second measurement electric current line
The output end on road is connected with amplifier negative terminal.
It is illustrated in figure 3 direct-current arc and produces circuit theory diagrams, has figure to understand that relay module of the invention is also equipped with electric arc
Fault detection capability：When there is the phenomenon of short circuit overcurrent, the output state of comparator overturns at once, triggering microcontroller
External interrupt is input into.Microcontroller, at once just can be by the line of the failure that is short-circuited inside the service subfunction of external interrupt
Road is closed.Microcontroller sends shutdown signal by gate drive circuit, power MOSFET is closed in time, so as to protect short
Pass by the circuit of stream, it is to avoid the further generation of short circuiting arc.For serial electric arc, when it occurs, circuit is not in short
Specific overcurrent condition high when road electric arc occurs, but its line current occurs that the electric current of transient state falls variation phenomenon, leads to
After crossing the current characteristic that software identifies these serial electric arcs, compare current value and internal predefined threshold that present sample is obtained
The size of value parameter 1/2/3, once detecting failure, will in time close power MOSFET, it is to avoid failure propagation.
Arc protection theory of algorithm inside microcontroller of the present invention 1 is as follows with realization：
Typical direct-current arc current waveform figure is illustrated in figure 4, as seen from the figure, by Ohm's law it is recognised that passing through
The size of current at resistance two ends, is proportional to the voltage swing at its two ends.Converted by the ohmically electric current of four-wire system Precision measurement
For voltage, it is possible to the real situation of change for reflecting electric current in circuit.The ripple of the typical arc fault current for producing
Shape.When no electric arc is produced, the voltage at load resistance two ends is equal to supply voltage in Fig. 3 circuits.
The content not being described in detail in description of the invention belongs to the known technology of those skilled in the art.
Claims (3)
1. the relay module of a kind of high security, it is characterised in that：Including serial isolation bus module, microcontroller, input electricity
Pressure linear optical coupling isolation detection module, gate-drive module, low-pass filtering module, comparator, amplifier, power MOSFET and four
Line high side current detection resistance；
Input voltage linear optical coupling isolation detection module：After power supply circuit is powered, the voltage form analog voltage letter of load is generated
Number, and voltage form analog voltage signal is sent to microcontroller；
Microcontroller：Receive the voltage form analog voltage signal that input voltage linear optical coupling isolation detection module is transmitted；By electricity
Swaging formula analog voltage signal is sent to serial isolation bus module；Receive the Transistor-Transistor Logic level that serial isolation bus module is transmitted
The instruction of power MOSFET is closed, and the instruction of the closing power MOSFET of Transistor-Transistor Logic level is sent to gate-drive module；Receive
The instruction for opening power MOSFET of the Transistor-Transistor Logic level that serial isolation bus module is transmitted, and by the opening power of Transistor-Transistor Logic level
The instruction of MOSFET is sent to gate-drive module；Receive the filtered current forms analog voltage that low-pass filtering module is transmitted
Signal；And send to serial isolation bus module filtered current forms analog voltage signal；Receive what comparator was transmitted
Interrupt signal, interrupt signal is sent to gate-drive module；
Serial isolation bus module：The voltage form analog voltage signal that microcontroller is transmitted is received, voltage form is simulated into electricity
Pressure signal is converted to the voltage form analog voltage signal of external bus level, and the voltage form of external bus level is simulated
Voltage signal is sent to external control device；Receive the closing power MOSFET of the external bus level that external control device is transmitted
Instruction；And the instruction of the closing power MOSFET of external bus level is converted to the closing power MOSFET of Transistor-Transistor Logic level
Instruction, and the instruction of the closing power MOSFET of Transistor-Transistor Logic level is sent to microcontroller；It is outer that reception external control device is transmitted
The instruction for opening power MOSFET of portion's bus level；And be converted to the instruction of the opening power MOSFET of external bus level
The instruction of the opening power MOSFET of Transistor-Transistor Logic level, and the instruction of the opening power MOSFET of Transistor-Transistor Logic level is sent to microcontroller
Device；The filtered current forms analog voltage signal that microcontroller is transmitted is received, by filtered current forms analog voltage
Signal is converted to the current forms analog voltage signal of external bus level, and the current forms of external bus level are simulated into electricity
Pressure signal is sent to external control device；
External control device：Receive the voltage form analog voltage letter of the external bus level that serial isolation bus module is transmitted
Number, the voltage form analog voltage signal to outside bus level is monitored judgement, when voltage form analog voltage signal is super
When going out to preset voltage range, the instruction for closing power MOSFET for sending external bus level isolates bus mould to serial
Block；When voltage form analog voltage signal is when presetting in voltage range, the opening power of external bus level is sent
The instruction of MOSFET isolates bus module to serial；Receive the electric current shape of the external bus level that serial isolation bus module is transmitted
Formula analog voltage signal；
Gate-drive module：The instruction for closing power MOSFET of the Transistor-Transistor Logic level that microcontroller is transmitted is received, by Transistor-Transistor Logic level
The instruction map for closing power MOSFET is the gate pole closing control signal of 12V, is sent to power MOSFET；Receive microcontroller
The instruction for opening power MOSFET of the Transistor-Transistor Logic level for transmitting, is 12V by the instruction map for opening power MOSFET of Transistor-Transistor Logic level
Gate pole open control signal, send to power MOSFET；The interrupt signal for transmitting volume that microcontroller is transmitted is received, will be interrupted
Signal is converted into the interrupt signal of 12V, and the interrupt signal of 12V is sent to power MOSFET；
Power MOSFET：The gate pole closing control signal of the 12V that gate-drive module is transmitted is received, power MOSFET is closed；Connect
The gate pole for receiving the 12V that gate-drive module is transmitted opens control signal, and power MOSFET is opened；Gate-drive module is received to transmit
12V interrupt signal, power MOSFET close；
Four-wire system high side current detection resistance：After power MOSFET is opened, the electric current of power supply circuit passes through four-wire system high side current
Detection resistance, produces resistive voltage, and resistive voltage is sent to amplifier；
Amplifier：The resistive voltage that four-wire system high side current detection resistance is transmitted is received, treatment is amplified to resistive voltage, it is raw
Resistive voltage after Cheng Fa great, and will send out it is big after resistive voltage export to low-pass filtering module；
Low-pass filtering module：Resistive voltage after hair that reception amplifier is transmitted is big, is filtered to resistive voltage of the hair after big
Treatment, generates filtered current forms analog voltage signal, and by filtered current forms analog voltage signal export to
Microcontroller；Filtered current forms analog voltage signal is exported to comparator simultaneously；
Comparator：Default excessively stream magnitude of voltage；Receive the filtered current forms analog voltage signal that low-pass filtering module is transmitted；
Filtered current forms analog voltage signal and default excessively stream magnitude of voltage are compared, when the simulation of filtered current forms
When voltage signal exceedes default excessively stream magnitude of voltage, interrupt signal to microcontroller is sent；When filtered current forms simulate electricity
When pressure signal is no more than default excessively stream magnitude of voltage, do not process；
Microcontroller：The analog voltage signal of receiving voltage and the analog voltage signal of electric current；Stored；When receiving outside
When signal acquisition that control device is sent is instructed, the analog voltage signal of output voltage and the analog voltage signal of electric current to outside
Control device.
2. the relay module of a kind of high security according to claim 1, it is characterised in that：The relay module also includes
First insulating power supply and the second insulating power supply；
First insulating power supply：Output+5V power supplys are powered for input voltage linear optical coupling isolation detection module；
Second insulating power supply：Output+12V power supplys are gate-drive module for power supply；Output+3.3V power supplys are serial isolation bus mould
Block, microcontroller, low-pass filtering module, comparator and amplifier are powered.
3. the relay module of a kind of high security according to claim 1, it is characterised in that：The four-wire system high side current
Detection resistance includes detection resistance, first resistor, first line, second resistance, the second circuit, the first measurement current circuit and the
Two measurement current circuits；Wherein, one end of detection resistance is connected with first line and the first measurement current circuit respectively；First Line
First resistor is in series with road；The output end of the first measurement current circuit is connected with amplifier anode；The other end of detection resistance
It is connected with the second circuit and the second measurement current circuit respectively；Connected on second circuit second resistance；Second measurement current circuit
Output end be connected with amplifier negative terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611205378.0A CN106802595A (en) | 2016-12-23 | 2016-12-23 | A kind of relay module of high security |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611205378.0A CN106802595A (en) | 2016-12-23 | 2016-12-23 | A kind of relay module of high security |
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| CN106802595A true CN106802595A (en) | 2017-06-06 |
Family
ID=58984233
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| CN201611205378.0A Pending CN106802595A (en) | 2016-12-23 | 2016-12-23 | A kind of relay module of high security |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112615540A (en) * | 2020-12-24 | 2021-04-06 | 上海汇珏网络通信设备股份有限公司 | High-side current sampling device of direct-current power supply with wide voltage range |
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| CN102324920A (en) * | 2011-04-13 | 2012-01-18 | 北京卫星制造厂 | Fault isolation electronic switch applicable to direct current power supply system of spacecraft |
| CN103065883A (en) * | 2013-01-09 | 2013-04-24 | 常州市吉士电器有限公司 | Intelligent high-voltage direct-current relay |
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|---|---|---|---|---|
| CN101442202A (en) * | 2008-12-30 | 2009-05-27 | 西安富邦电子科技有限公司 | Rapid protection device for indoor cable head |
| CN201656427U (en) * | 2009-10-20 | 2010-11-24 | 湖北盛佳电器设备有限公司 | Circuit breaker for preventing lines from breaking |
| CN101882927A (en) * | 2010-07-01 | 2010-11-10 | 西北工业大学 | Soft switch device of alternating current solid-state power controller |
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| CN112615540A (en) * | 2020-12-24 | 2021-04-06 | 上海汇珏网络通信设备股份有限公司 | High-side current sampling device of direct-current power supply with wide voltage range |
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Application publication date: 20170606 |
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