CN206876825U - A kind of detection circuit for detecting relay malfunction and the relay with this circuit - Google Patents
A kind of detection circuit for detecting relay malfunction and the relay with this circuit Download PDFInfo
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- CN206876825U CN206876825U CN201720507485.2U CN201720507485U CN206876825U CN 206876825 U CN206876825 U CN 206876825U CN 201720507485 U CN201720507485 U CN 201720507485U CN 206876825 U CN206876825 U CN 206876825U
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- relay
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- coil
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Abstract
The utility model discloses a kind of detection circuit for detecting relay malfunction and the relay with this circuit, including contact voltage drop detection means, coil signal detection means and multilevel iudge device, comparison circuit and signal output apparatus are set in contact voltage drop detection means, voltage comparator and photo-coupler are set in comparison circuit, comparison circuit detection relay contact pressure drop both ends on off operating mode is simultaneously formed in contact voltage drop signal input comparison circuit；The pressure drop at photo-coupler detection relay contact both ends, when detecting that contact both ends have pressure drop to illustrate that relay contact disconnects；Multilevel iudge circuit is set in multilevel iudge device; the coil pressure drop signal at coil signal detection means detection read coil both ends, detect and judge whether contact is in closure and judges whether relay is normal or fails compared with acquisition coil pressure drop number is inputted to the multilevel iudge circuit in multilevel iudge device jointly with contact voltage drop signal.Fault detection efficiency is high, and maintenance and easy to maintain, breakdown loss are few.
Description
Technical field
A kind of relay is the utility model is related to, relay contact malfunction detected more particularly, to a kind of
Relay.
Background technology
Relay is a kind of conventional electric control device, it be when the change of input energizing quantity reach regulation requirement when,
Make controlled volume that a kind of electrical equipment of predetermined Spline smoothing occur in electric output circuit.It has control system or input circuit
And by the interactive relationship between control system or output loop.It is commonly used in the control circuit of automation, relay exists
It is often used as going to control one kind " automatic switch " of high current running by low current in actual circuit, and is widely used in
Numerous occasions, play in circuit automatically adjust, safeguard protection, the effect such as change-over circuit.Because relay is that have isolation work(
The automatic switch element of energy, therefore be widely used in remote control, remote measurement, communicate, automatically control, electromechanical integration, power electronics
One of most important control element in equipment and Vehicle Electronic Control element, existing relay species is various, such as electromagnetism after
Electrical equipment, optical relay etc.；Wherein relay element has also been used in automobile manufacture, it is therefore an objective to for vehicle mounted electrical apparatus
It is effectively protected and is controlled；But existing AUTOMOTIVE RELAY is detected and tried to relay contact break-make only before dispatching from the factory
Inspection is tested, and relay is not possess self detection on off operating mode and malfunction in itself, and this nothing is being made suspected of relay
After the input actual use of electric control device, self the detection break-make and malfunction of itself are difficult to realize, was both easily triggered
Fault occurs, and there is when control circuit breaks down, it is impossible to quick and precisely judges trouble point position, gives
Fault detection band is delayed, and is unfavorable for the maintenance of whole control system.
Utility model content
The utility model does not possess self detection on off operating mode and malfunction there is itself to solve existing relay
The defects of, cause both easy detonator circuit failure appearance, and there is when control circuit breaks down, it is impossible to quick and precisely sentence
A disconnected position of being out of order, is delayed to fault detection band, is unfavorable for the present situations such as the maintenance of whole control system and carries
One kind of confession can in time judge that control system trouble point institute is in place with effective detection relay contact both ends on off operating mode
Put, improve the detection circuit of the detection relay malfunction of fault detection efficiency and the relay with this circuit.
The utility model is that concrete technical scheme is used by solving above-mentioned technical problem：One kind detection relay failure
The detection circuit of state, including relay coil and relay contact, it is characterised in that：Also include a detection relay contact
The contact voltage drop detection means of both ends pressure drop, a coil signal detection means and one for detecting relay coil both ends electric signal
Individual multilevel iudge relay is in normal or failure state multilevel iudge device, be provided with the contact voltage drop detection means than
Compared with circuit and signal output apparatus, voltage comparator and photo-coupler are provided with comparison circuit, comparison circuit detection relay touches
The on off operating mode at point pressure drop both ends, and by off operating mode be converted into voltage ratio in contact voltage drop signal input comparison circuit compared with
End；The pressure drop at relay contact both ends is detected by photo-coupler, when detecting that relay contact both ends have pressure drop to illustrate relay
Device contact is off, and is exported and prompted by signal output apparatus；Multilevel iudge circuit is provided with multilevel iudge device,
The coil pressure drop signal at the coil signal detection means detection read coil both ends, detection obtain the coil pressure drop at coil both ends
The contact voltage drop signal that signal obtains contact both ends with contact voltage drop detection means inputs to the ratio in multilevel iudge device jointly
Be compared compared with decision circuitry, be compared judge contact whether in closure state and judge relay whether in normal or
Failure state.The pressure drop at relay contact both ends is detected by photo-coupler, has pressure drop to illustrate that contact is off, pressure drop
It is zero or is almost equal to zero, illustrates that contact is in closure state；Pass through the telecommunications at multilevel iudge device read coil both ends simultaneously
Number, it is compared and judges whether contact is in closure state and judges relay whether in normal or failure state.Effectively certainly
The dynamic on off operating mode for detecting relay contact both ends, in control system failure state, quickly can judge in time be
System trouble point position, improves fault detection efficiency, more using the maintenance and maintenance of whole control system, reduces for some reason
Hinder the many-sided loss brought.
Preferably, described photo-coupler uses photo-coupler of the chip model for P521, the input of photo-coupler
It is in series by 3rd resistor and relay contact both ends and is joined together to form the input circuit of photo-coupler；Photo-coupler
Level output end is electrically connected with voltage comparator input, another output end of photo-coupler and the earth polar phase in comparison circuit
Electrical connection, form the output loop of photo-coupler.Improving can to the contact voltage drop signal detection collection stabilization of contact both ends pressure drop
By property.
Preferably, in described comparison circuit be provided with direct current power source voltage, the 4th resistance, the 6th resistance, the 7th resistance,
Tenth resistance and voltage comparator, voltage comparator use voltage comparator of the chip model for LM393, and the of voltage comparator
One compares input IN+ pins and the level output end of photo-coupler is electrically connected, after the 6th resistance and the 7th resistant series with
Direct current power source voltage is in parallel connection, what the 6th resistance and the 7th resistance were in series be connected in series a little with voltage comparator first
Compare input IN- pins to be electrically connected, the output that is electrically connected of comparison output end and the signal output apparatus of voltage comparator carries
Show contact both ends on off operating mode；Direct current power source voltage positive pole is accessed after the level output end of photo-coupler and the 4th resistant series
End, another output end of photo-coupler is with accessing direct current power source voltage negative pole end after the tenth resistant series.Detect circuit structure letter
It is single reliable.
Preferably, described coil signal detection means uses NOR gate circuit of the chip model for 74h086, relay
Device coil both ends are parallel with first resistor and second resistance, and the series connection node after first resistor and second resistance are connected is inputted to different
Second in OR circuit compares input IN+ pins, and the level output end and voltage comparator input of photo-coupler are mutually electric
Connection, another output end of photo-coupler input IN- pins compared with second in NOR gate circuit are electrically connected, by different
The coil pressure drop signal at OR gate read coil both ends, and judge that relay touches compared with the contact voltage drop signal at contact both ends
Whether whether point be in closure state and judge relay in normal or failure state.Judge that detection circuit structure simply may be used
Lean on.
Preferably, described signal output apparatus is using LED instruction output circuits or the instruction output of honey device；LED
Output circuit is indicated using the 8th resistance and the first LED light emitting diodes that are connected in series, the 8th resistance one end and voltage ratio compared with
Device output end is electrically connected, and the other end is electrically connected with the first LED light-emitting diodes tube anodes, the first LED light-emitting diodes tube cathodes
It is electrically connected with direct current power source voltage negative pole.It is easy to user or guardian quickly to judge the break-make that relay contact both ends occur
State.
Preferably, described NOR gate circuit output end, which is provided with, judges signal output apparatus, signal output apparatus is judged
Output circuit or the instruction output of honey device are judged using LED instructions；LED instructions judge that output circuit use is connected in series
Nine resistance and the 2nd LED light emitting diodes, the 9th resistance one end are electrically connected with NOR gate circuit output end, the other end and second
LED light-emitting diodes tube anodes are electrically connected, and the 2nd LED light-emitting diodes tube cathode is electrically connected with direct current power source voltage negative pole.Just
Quickly judge the break-make or malfunction of the appearance of relay contact both ends in user or guardian.
Preferably, described NOR gate circuit accesses direct current power source voltage by three terminal regulator, NOR gate circuit is defeated
Going out between end and the 9th resistance electrically coupled in series has a NOT gate.Raising judges stable output signal reliability.
Another goal of the invention of the present utility model is to provide a kind of relay, including relay package shell, and it is special
Sign is：Also include above-mentioned technical proposal described in detection relay malfunction detection circuit, relay package shell, after
Electric apparatus coil, relay contact and the common relay that the formula that links into an integrated entity is set of detection circuit for detecting relay malfunction
Finished product.Effective automatic detection goes out the on off operating mode at relay contact both ends, in control system failure state, can quickly and
When judge system failure point position, improve fault detection efficiency, the more maintenance using whole control system and dimension
Shield, reduce many-sided loss that barrier for some reason is brought.
Preferably, the detection circuit of detection relay malfunction is located at the package cavity that relay package shell is surrounded
It is interior.The compacter stabilization of overall structure.
Preferably, the detection circuit of detection relay malfunction is located at relay package outer shell outer wall, relay
The fixed mount of the detection circuit provided with fixed test relay malfunction, detects relay malfunction at package casing outer wall
Detection circuit the mounting connection structure to form integral type is fixed by fixed mount and relay package shell.Overall structure is tight
Gather, easy to maintain is reliable.
The beneficial effects of the utility model are：The pressure drop at relay contact both ends is detected by photo-coupler, has pressure drop to say
Bright contact is off, and pressure drop is zero or is almost equal to zero, and illustrates that contact is in closure state；Pass through multilevel iudge simultaneously
The electric signal at the XOR gate read coil both ends in device, it is compared and judges whether contact is in closure state and judges relay
Whether device is in normal or failure state.Effective automatic detection goes out the on off operating mode at relay contact both ends, goes out in control system
During existing malfunction, system failure point position can be quickly judged in time, fault detection efficiency is improved, more using whole
The maintenance and maintenance of individual control system, reduce many-sided loss that barrier for some reason is brought.
Brief description of the drawings：
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
Fig. 1 is a kind of theory structure block diagram for the detection circuit for detecting relay malfunction of the utility model.
Fig. 2 is a kind of detection circuit for detecting relay malfunction of the utility model and the relay with this circuit
Circuit theory schematic diagram.
Embodiment
Embodiment 1：
In embodiment shown in Fig. 1, Fig. 2, a kind of detection circuit for detecting relay malfunction, including relay coil
AB and relay contact CD, include the contact voltage drop detection means 10, one of a detection relay contact CD both ends pressure drop
The coil signal detection means 20 and a multilevel iudge relay for detecting relay coil both ends electric signal are in normal or lost
The multilevel iudge device 30 of effect state, 10 are provided with comparison circuit 11 and signal output apparatus in the contact voltage drop detection means
12, voltage comparator ic 1 and photo-coupler IC2, comparison circuit IC1 detection relay contact CD pressure drops are provided with comparison circuit 11
The on off operating mode at both ends, and the voltage ratio that on off operating mode is converted into contact voltage drop signal input comparison circuit is relatively held；Pass through
The pressure drop at photo-coupler IC2 detections relay contact CD both ends, when detecting that relay contact CD both ends have pressure drop to illustrate relay
Device contact is off, and is exported and prompted by signal output apparatus；Multilevel iudge circuit is provided with multilevel iudge device,
The coil pressure drop signal at the coil signal detection means detection read coil both ends, detection obtain the coil pressure drop at coil both ends
The contact voltage drop signal that signal obtains contact both ends with contact voltage drop detection means is inputted into multilevel iudge device 30 jointly
Multilevel iudge circuit 31 is compared, and is compared and is judged whether contact is in closure state and judges relay whether in just
Normal or failure state.Photo-coupler IC2 uses photo-coupler of the chip model for P521, and the input of photo-coupler passes through the 3rd
Resistance R3 is in series with relay contact CD both ends and is joined together to form photo-coupler IC2 input circuit；Photo-coupler IC2
Level output end G be electrically connected with voltage comparator input, another output end H of photo-coupler and the ground in comparison circuit
Pole is electrically connected, and forms the output loop of photo-coupler.Direct current power source voltage 12V/24V, the 4th electricity are provided with comparison circuit 11
R4, the 6th resistance R6, the 7th resistance R7, the tenth resistance R10 and voltage comparator ic 1 are hindered, voltage comparator ic 1 is using chip-shaped
Number be LM393 voltage comparator, the first of voltage comparator ic 1 compares input IN+ pins and photo-coupler IC2 level
Output end G is electrically connected, and is in parallel and is connected with direct current power source voltage after the 6th resistance R6 and the 7th resistance R7 series connection, the 6th resistance
What R6 and the 7th resistance R7 was in series, which be connected in series point F input IN- pins compared with the first of voltage comparator ic 1, is mutually electrically connected
Connect, comparison output end OUT+ and the signal output apparatus 21 of voltage comparator ic 1, which are electrically connected, exports prompting contact both ends break-make
State；The level output end G of photo-coupler time accesses direct current power source voltage 12V/24V positive terminals after being connected with the 4th resistance R4,
Photo-coupler IC2 another output end accesses direct current power source voltage negative pole end after being connected with the tenth resistance R10.Coil signal detects
Device uses NOR gate circuit IC3 of the chip model for 74h086, and relay coil both ends are parallel with first resistor R1 and second
What the series connection node E after resistance R2, first resistor R1 and second resistance R2 series connection was inputted into NOR gate circuit IC3 second compares
Input IN+ pins, level output end and the voltage comparator input of photo-coupler are electrically connected, photo-coupler it is another defeated
Go out end input IN- pins compared with second in NOR gate circuit to be electrically connected, pass through the line at XOR gate read coil both ends
Pressure drop signal is enclosed, and judge whether relay contact is in closure state simultaneously compared with the contact voltage drop signal at contact both ends
Judge relay whether in normal or failure state.NOR gate circuit IC3 forms the main circuit of multilevel iudge circuit 31.Letter
Number output circuit 12 is using LED instruction output circuits or the instruction output of honey device；LED instruction output circuits are adopted 12 and connected with series connection
The 8th resistance R8 connect and the first LED LEDs 1, the 8th resistance R8 one end are mutually electric with the output end of voltage comparator ic 1
Connection, the other end is electrically connected with the anode of the first LED LEDs 1, the negative electrode of the first LED LEDs 1 with directly
Stream supply voltage negative pole is electrically connected.NOR gate circuit output end, which is provided with, judges signal output apparatus, judges signal output apparatus
Output circuit or the instruction output of honey device are judged using LED instructions；LED instructions judge that output circuit use is connected in series
Nine resistance and the 2nd LED light emitting diodes, the 9th resistance R9 one end are electrically connected with NOR gate circuit output end, the other end and
Two LED light-emitting diodes tube anodes LED2 are electrically connected, and the 2nd LED light-emitting diodes tube cathode is mutually electrically connected with direct current power source voltage negative pole
Connect.NOR gate circuit IC3 accesses direct current power source voltage, NOR gate circuit output end and the 9th resistance by three terminal regulator IC4
Between electrically coupled in series have a NOT gate.Three terminal regulator IC4 uses model L7805 voltage stabilizing chip.
Embodiment 2
A kind of relay, including relay package shell, in addition to the detection relay malfunction described in embodiment 1
Detect circuit, relay package shell, relay coil, relay contact and detect relay malfunction detection circuit be total to
With the relay finished product for setting the formula that links into an integrated entity.The detection circuit of detection relay malfunction is located at relay package shell
In the package cavity surrounded.When relay K works, C contacts and D contacts Liang Ge contacts are used to control band dynamic load R work.When
Can also be so that the detection circuit for detecting relay malfunction is located at relay package outer shell outer wall, outside relay package
The fixed mount of the detection circuit provided with fixed test relay malfunction, detects the detection of relay malfunction at shell outer wall
Circuit fixes the mounting connection structure to form integral type by fixed mount and relay package shell.Other are identical with embodiment 1.
Above content and structure describes the general principle of the utility model product, principal character and of the present utility model excellent
Point, it should be understood by those skilled in the art that.Simply illustrate principle of the present utility model described in examples detailed above and specification,
Without departing from the spirit and scope of the present invention, the utility model also has various changes and modifications, and these change and changed
Enter and belong within claimed the scope of the utility model.The utility model requires protection scope is by appended claims
And its equivalent thereof.
Claims (10)
1. a kind of detection circuit for detecting relay malfunction, including relay coil and relay contact, it is characterised in that：
Also include contact voltage drop detection means, a detection relay coil both ends telecommunications for a detection relay contact both ends pressure drop
Number coil signal detection means and multilevel iudge relay be in normal or failure state multilevel iudge device, it is described
Comparison circuit and signal output apparatus are provided with contact voltage drop detection means, voltage comparator and optical coupling are provided with comparison circuit
Device, the on off operating mode at comparison circuit detection relay contact pressure drop both ends, and it is defeated that on off operating mode is converted into contact voltage drop signal
The voltage ratio entered in comparison circuit is relatively held；The pressure drop at relay contact both ends is detected by photo-coupler, when detecting relay
Contact both ends have pressure drop to illustrate that relay contact is off, and are exported and prompted by signal output apparatus；Multilevel iudge
Multilevel iudge circuit, the coil pressure drop signal at the coil signal detection means detection read coil both ends, inspection are provided with device
Survey the coil pressure drop signal for obtaining coil both ends and the contact voltage drop signal at contact voltage drop detection means acquisition contact both ends is common
Input is compared to the multilevel iudge circuit in multilevel iudge device, is compared and is judged whether contact is in closure state simultaneously
Judge relay whether in normal or failure state.
2. according to the detection circuit of the detection relay malfunction described in claim 1, it is characterised in that：Described optical coupling
Device uses photo-coupler of the chip model for P521, and the input of photo-coupler passes through 3rd resistor and relay contact both ends phase
It is connected in series to form the input circuit of photo-coupler；The level output end of photo-coupler and voltage comparator input phase
Electrical connection, another output end and the earth polar in comparison circuit of photo-coupler are electrically connected, and form the output loop of photo-coupler.
3. according to the detection circuit of the detection relay malfunction described in claim 1, it is characterised in that：Described comparison is electric
Be provided with direct current power source voltage, the 4th resistance, the 6th resistance, the 7th resistance, the tenth resistance and voltage comparator in road, voltage ratio compared with
Device uses voltage comparator of the chip model for LM393, and the first of voltage comparator compares input IN+ pins and photo-coupler
Level output end be electrically connected, be in parallel and be connected with direct current power source voltage after the 6th resistance and the 7th resistant series, the 6th electricity
Input IN- pins are electrically connected compared with the first of voltage comparator for resistance and being connected in series a little of being in series of the 7th resistance, electric
The comparison output end of comparator and signal output apparatus is pressed to be electrically connected and export prompting contact both ends on off operating mode；Photo-coupler
Direct current power source voltage positive terminal, another output end of photo-coupler and the tenth electricity are accessed after level output end and the 4th resistant series
Direct current power source voltage negative pole end is accessed after resistance series connection.
4. according to the detection circuit of the detection relay malfunction described in claim 1, it is characterised in that：Described coil letter
Number detection means uses NOR gate circuit of the chip model for 74h086, and relay coil both ends are parallel with first resistor and second
What the series connection node after resistance, first resistor and second resistance series connection was inputted into NOR gate circuit second compares input IN+
Pin, level output end and the voltage comparator input of photo-coupler are electrically connected, another output end of photo-coupler with it is different
Second in OR circuit, which compares input IN- pins, is electrically connected, and is believed by the coil pressure drop at XOR gate read coil both ends
Number, and judge whether relay contact is in closure state and judges relay compared with the contact voltage drop signal at contact both ends
Whether device is in normal or failure state.
5. according to the detection circuit of the detection relay malfunction described in claim 1, it is characterised in that：Described signal is defeated
Go out circuit using LED instruction output circuits or the instruction output of honey device；LED instruction output circuits are using the 8th be connected in series
Resistance and the first LED light emitting diodes, the 8th resistance one end are electrically connected with voltage comparator output end, the other end and first
LED light-emitting diodes tube anodes are electrically connected, and the first LED light-emitting diodes tube cathode is electrically connected with direct current power source voltage negative pole.
6. according to the detection circuit of the detection relay malfunction described in claim 4, it is characterised in that：Described XOR gate
Circuit output end, which is provided with, judges signal output apparatus, judges that signal output apparatus judges output circuit or honeybee using LED instructions
Sweet device instruction output；LED instructions judge that output circuit uses the 9th resistance and the 2nd LED light emitting diodes being connected in series, the
Nine resistance one end are electrically connected with NOR gate circuit output end, and the other end is electrically connected with the 2nd LED light-emitting diodes tube anodes, the
Two LED light-emitting diodes tube cathodes are electrically connected with direct current power source voltage negative pole.
7. according to the detection circuit of the detection relay malfunction described in claim 4 or 6, it is characterised in that：Described is different
OR circuit accesses direct current power source voltage by three terminal regulator, electrically coupled in series between NOR gate circuit output end and the 9th resistance to have
One NOT gate.
8. a kind of relay, including relay package shell, it is characterised in that：Also include claim 1~7 described in detection after
The detection circuit of apparatus failure state, relay package shell, relay coil, relay contact and detection relay failure shape
The detection circuit of state sets the relay finished product for the formula that links into an integrated entity jointly.
9. according to the relay described in claim 8, it is characterised in that：Detection relay malfunction detection circuit be located at after
In the package cavity that electrical packaging shell is surrounded.
10. according to the relay described in claim 8, it is characterised in that：The detection circuit of detection relay malfunction is located at
At relay package outer shell outer wall, the detection circuit of fixed test relay malfunction is provided with relay package outer shell outer wall
Fixed mount, the detection circuit for detecting relay malfunction fixes to form integral type by fixed mount and relay package shell
Mounting connection structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720507485.2U CN206876825U (en) | 2017-05-09 | 2017-05-09 | A kind of detection circuit for detecting relay malfunction and the relay with this circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720507485.2U CN206876825U (en) | 2017-05-09 | 2017-05-09 | A kind of detection circuit for detecting relay malfunction and the relay with this circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206876825U true CN206876825U (en) | 2018-01-12 |
Family
ID=61339286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720507485.2U Expired - Fee Related CN206876825U (en) | 2017-05-09 | 2017-05-09 | A kind of detection circuit for detecting relay malfunction and the relay with this circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206876825U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108832673A (en) * | 2018-06-06 | 2018-11-16 | 西安特锐德智能充电科技有限公司 | The starting method for measuring charged of DC charging system, PDU and charging path |
| CN108832590A (en) * | 2018-07-13 | 2018-11-16 | 浙江英洛华新能源科技有限公司 | overcurrent protection relay |
| CN109143049A (en) * | 2018-07-28 | 2019-01-04 | 国营芜湖机械厂 | A kind of electromagnetic relay lifetime estimation method based on electrical combined detection technique |
| CN109254245A (en) * | 2018-11-07 | 2019-01-22 | 紫光测控有限公司 | A kind of short circuit of relay circuit and open detection circuit |
| CN109920314A (en) * | 2019-04-16 | 2019-06-21 | 广东交通职业技术学院 | A relay fault simulation circuit and relay teaching board |
| CN113285424A (en) * | 2021-05-27 | 2021-08-20 | 广东美的厨房电器制造有限公司 | Power supply circuit, control method of power supply circuit, cooking apparatus, and storage medium |
| CN117250497A (en) * | 2023-11-20 | 2023-12-19 | 苏州联讯仪器股份有限公司 | A relay self-checking circuit and power supply equipment |
-
2017
- 2017-05-09 CN CN201720507485.2U patent/CN206876825U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108832673A (en) * | 2018-06-06 | 2018-11-16 | 西安特锐德智能充电科技有限公司 | The starting method for measuring charged of DC charging system, PDU and charging path |
| CN108832673B (en) * | 2018-06-06 | 2021-07-23 | 西安特锐德智能充电科技有限公司 | Direct current charging system, PDU (Power distribution Unit) and starting charging detection method of charging path |
| CN108832590A (en) * | 2018-07-13 | 2018-11-16 | 浙江英洛华新能源科技有限公司 | overcurrent protection relay |
| CN108832590B (en) * | 2018-07-13 | 2023-09-29 | 浙江英洛华新能源科技有限公司 | Overcurrent protection relay |
| CN109143049A (en) * | 2018-07-28 | 2019-01-04 | 国营芜湖机械厂 | A kind of electromagnetic relay lifetime estimation method based on electrical combined detection technique |
| CN109254245A (en) * | 2018-11-07 | 2019-01-22 | 紫光测控有限公司 | A kind of short circuit of relay circuit and open detection circuit |
| CN109254245B (en) * | 2018-11-07 | 2020-12-01 | 紫光测控有限公司 | Relay loop short circuit and open circuit detection circuit |
| CN109920314A (en) * | 2019-04-16 | 2019-06-21 | 广东交通职业技术学院 | A relay fault simulation circuit and relay teaching board |
| CN113285424A (en) * | 2021-05-27 | 2021-08-20 | 广东美的厨房电器制造有限公司 | Power supply circuit, control method of power supply circuit, cooking apparatus, and storage medium |
| CN117250497A (en) * | 2023-11-20 | 2023-12-19 | 苏州联讯仪器股份有限公司 | A relay self-checking circuit and power supply equipment |
| CN117250497B (en) * | 2023-11-20 | 2024-04-09 | 苏州联讯仪器股份有限公司 | Relay self-checking circuit and power supply equipment |
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