CN108307565A - A kind of LED lamp switching circuit and control method preventing relay contact ablation - Google Patents
A kind of LED lamp switching circuit and control method preventing relay contact ablation Download PDFInfo
- Publication number
- CN108307565A CN108307565A CN201810236171.2A CN201810236171A CN108307565A CN 108307565 A CN108307565 A CN 108307565A CN 201810236171 A CN201810236171 A CN 201810236171A CN 108307565 A CN108307565 A CN 108307565A
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- Prior art keywords
- relay
- triode
- led lamp
- turn
- switching circuit
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The present invention discloses a kind of LED lamp switching circuit preventing relay contact ablation, it is connected to the first relay and the second relay between lamps and lanterns input firewire and alternating current firewire respectively including contact foot, the coil foot of first relay is between the first transistor collector and power supply, the coil foot of second relay is located between the collector and power supply of the second triode, the base stage of first triode and the second triode is connect with microcontroller respectively, emitter is connected to ground, the microcontroller is connected between power supply and ground wire, thermistor is equipped between two contact feet of the second relay；Execution turn on light order when, microcontroller control the first triode make the first relay be connected, controlled again after the first relay be connected the second triode make the second relay conducting；Execution turn off the light order when, microcontroller control the second triode make the second relay turn off, controlled again after the second relay turn off the first triode make the first relay shutdown.Since the switching circuit is Discrete control in switch, it can prevent the moment that LED lamp is connected in relay from generating the contact of high current ablation relay.
Description
Technical field
It is the present invention relates to a kind of lamp switch field of circuit technology, more particularly to a kind of to prevent relay contact ablation
LED lamp switching circuit and control method.
Background technology
Since LED lamp has preferable energy saving and brightness, thus its application is more and more universal.
Major part office buildings is assembled with LED lamp at present, effectively reduces the energy consumption of building.Although LED lamp has section
The efficient feature of energy, but since LED lamp is capacitive load, prodigious transient current is will produce in powered on moment, this just gives
The automatic switch control of LED lamp proposes certain difficulty.Such as in the automatic Switching control of lamps and lanterns of office buildings, tradition
Way be that the switch of lamps and lanterns is realized by relay, but since the transient current that powers on of LED lamp is easy to greatly very much
The pitting of contact of relay is caused into contact adhesion and then can not be turned off, or forms larger resistance in contact, is easy shape
Phenomena such as at overheat.
Invention content
The invention mainly solves the technical problem of providing a kind of LED lamp switching circuits preventing relay contact ablation
And control method, wherein preventing the LED lamp switching circuit of relay contact ablation from can improve the reliable of automatic switch control
Property and safety.
In order to solve the above technical problem, the present invention provides a kind of LED lamps preventing relay contact ablation to switch electricity
Road, this prevents the LED lamp switching circuit of relay contact ablation from including：Contact foot is connected to lamps and lanterns input firewire and alternating current respectively
The coil foot of the first relay between firewire and the second relay, first relay is located at the first transistor collector and electricity
Source, the coil foot of the second relay are located at the collector and power end of the second triode, first triode and the two or three
The base stage of pole pipe is connect with microcontroller respectively, and the emitter of the first triode and the second triode is connected to ground, the micro-control
Device processed is connected between power supply and ground wire, and thermistor is equipped between two contact feet of second relay；Execution is opened
When lamp order, microcontroller, which controls the first triode, makes the first relay be connected, and controlling the second triode after conducting again makes second
Relay is connected；Execution turn off the light order when, microcontroller control the second triode control make the second relay turn off, after shutdown again
Controlling the control of the first triode makes the first relay turn off.
It further says, the thermistor includes NTC thermistor.
It further says, the resistance value of the thermistor is 5 Ω.
It further says, when conducting, the second relay is connected than the first relay delay 300mS-800mS；When shutdown,
First relay is than the delay 300mS-800mS shutdowns of the second relay.
It further says, second relay is connected than the first relay delay 500mS；
It further says, first relay is turned off than the second relay delay 500mS.
The present invention also provides a kind of LED lamp method of controlling switch preventing relay contact ablation, LED lamp switches
Control method includes that contact foot is connected to the first relay and the second relay between lamps and lanterns input firewire and alternating current firewire respectively
Device, the coil foot of first relay are located at the first transistor collector and power end, and the coil foot of the second relay is located at the
The base stage of the collector and power end of two triodes, first triode and the second triode is connect with microcontroller respectively,
The emitter of first triode and the second triode is connected to ground, and the microcontroller is connected between power supply and ground wire, in institute
It states and is equipped with thermistor between two contact feet of the second relay；
First controlling the first triode makes the first relay be connected, and the second triode of delays time to control makes the second relay be connected；
Execution turn off the light order when, first control the second triode make the second relay turn off, delay control again the first triode make first after
Electric appliance turns off.
It further says, the thermistor includes NTC thermistor.
It further says, the resistance value of the thermistor is 5 Ω.
It further says, second relay is connected than the first relay delay 500mS；First relay is than
The delay 500mS shutdowns of two relays.
The present invention prevents the LED lamp switching circuit of relay contact ablation, including contact foot to be connected to lamps and lanterns input respectively
The coil foot of the first relay between firewire and alternating current firewire and the second relay, first relay is located at the first triode
Collector and power end, the coil foot of the second relay are located at the collector and power end of the second triode, the one or three pole
The base stage of pipe and the second triode is connect with microcontroller respectively, and emitter and the ground of the first triode and the second triode connect
It connects, the microcontroller is connected between power supply and ground wire, and temperature-sensitive is equipped between two contact feet of second relay
Resistance；Execution turn on light order when, microcontroller control the first triode make the first relay be connected, after the first relay is connected
Controlling the second triode again makes the second relay be connected；Execution turn off the light order when, microcontroller control the second triode make second
Relay turns off, and controlling the first triode again after the second relay turns off makes the first relay turn off.Due to the switching circuit
It is Discrete control in switch, can prevents the moment that LED lamp is connected in relay from generating touching for high current ablation relay
Point.Common electromagnetic relay may be used, effectively reduce the cost of equipment.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, and the attached drawing in describing is the one of the present invention
A little embodiments to those skilled in the art without creative efforts, can also be according to these
Attached drawing obtains other accompanying drawings.
Fig. 1 is the LED lamp switching circuit embodiment electrical schematics that the present invention prevents relay contact ablation.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific implementation mode
In order to keep the purpose, technical scheme and advantage of invention clearer, below in conjunction with attached in the embodiment of the present invention
Figure, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is invention one
Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
The every other embodiment obtained under the premise of going out creative work, shall fall within the protection scope of the present invention.
As shown in Figure 1, the present invention provides a kind of LED lamp switching circuit embodiment preventing relay contact ablation.
This prevents the LED lamp switching circuit of relay contact ablation from including：Contact foot is connected to lamps and lanterns input firewire respectively
The coil foot of the first relay K1 between alternating current firewire and the second relay K2, first relay K1 are located at the one or three pole
Between pipe Q1 collectors and power supply, the coil foot of the second relay K2 is located between the collector and power supply of the second triode Q2,
The base stage of the first triode Q1 and the second triode Q2 are connect with microcontroller respectively, the first triode Q1 and second
The emitter of triode Q2 is connected to ground, and the microcontroller is connected between power supply and ground wire, in second relay
Thermistor R1 is equipped between two contact feet of K2；Execution turn on light order when, microcontroller control the first triode Q1 make
First relay K1 conductings, controlling the second triode Q2 after conducting again makes the second relay K2 conductings；Execution turn off the light order when, it is micro-
Controller MCU, which controls the second triode Q2, makes the second relay K2 shutdowns, and controlling the first triode after shutdown again makes the first relay
Device turns off.
Specifically, the thermistor R1 includes NTC thermistor, which leads in the first relay K1
Logical moment, so the resistance value of thermistor R1 has not degraded very low, can play current limliting in this way since temperature does not rise also
Effect generates prodigious transient current ablation relay contact to prevent when the first relay K1 conductings.Then as heat
The time that quick resistance R1 flows through electric current increases, which rises, and since the characteristic of NTC thermistor is temperature liter
High value reduces, and the fever of the NTC thermistor in this way will be reduced, to prevent NTC thermistor overheat from burning.And pass through
Capacitance in above process LED lamp has been completed that charging process, such electric current drop to the rated current of LED lamp, at this time
When the second relay K2 being connected again, also just there is no conducting when transient high-current, such second relay K2 there will not be after
The risk of appliance contact ablation.
The resistance value of the thermistor and package size are, therefore the resistance values of thermistor related with the power of LED lamp
It is preferred that being encapsulated as the plug-in unit of diameter 10mm using 5 Ω, which can meet most of office and household LED lamps and lanterns, switch electricity
The versatility on road.
When order is turned on light in execution, microcontroller first exports high level to the first triode Q1, makes the first relay K1
Conducting, after the first relay K1 conductings, delay certain time exports high electricity from microcontroller to the second triode Q2 again
It puts down, makes the second relay K2 conductings, alternating current firewire can be made to input firewire with lamps and lanterns and form access in this way, realize work(of turning on light
Energy.
When order is turned off the light in execution, microcontroller first exports low level to the second triode Q2 so that the second relay
K2 is first turned off, after the second relay K2 shutdown, delay certain time again to the first triode Q1 outputs low level make first after
Electric appliance K1 shutdowns can make alternating current firewire input firewire with lamps and lanterns and form open circuit, realize function of turning off the light in this way.
When turning on light, the first relay K1 is first connected, and is connected after the second relay K2, the turn-on time difference root of two relays
It is determined according to the capacitor charging time in LED lamp, that is, the second relay K2 is than one timing of the first relay K1 delays when being connected
Between be connected, which can determine according to capacitor charging time in LED lamp, can be 300mS-800mS.First
The effect that delay is connected with the second relay K2 by relay K1 is after ensureing the first relay K1 conductings, to ensure in LED lamp
After the completion of capacitor charging, then make the second relay K2 conductings.
Due to different brands, the capacitance size of the LED lamp interiors of products of different size is each different, in order to keep this to open
The versatility on powered-down road preferably sets the delay time to 500mS, this delay time can meet most in the market
Capacitor charging in LED lamp is completed.If the overlong time of delay setting will make NTC thermistor be in high temperature again
Time is longer, such that the reduced lifetime of NTC thermistor.
When turning off the light, the second relay K2 is first turned off, and is connected after the second relay K2, the turn-off time difference root of two relays
It is determined according to the capacitor charging time in LED lamp, that is, the first relay K1 is delayed certain time than the second relay K2 when turning off
Conducting, which can determine according to capacitor charging time in LED lamp, can be 300mS-800mS.In order to protect
The versatility of the switching circuit is held, preferably sets the delay time to 500mS, this delay time can meet big absolutely in the market
Capacitor charging in the LED lamp of part is completed.
In the present embodiment, the first relay K1 and the second relay K2 is identical with function using existing phase structure
Relay.The first triode Q1 and the first triode Q2 uses existing phase structure and the identical triode of function.
The present invention also provides a kind of LED lamp method of controlling switch preventing relay contact ablation, LED lamp switches
Control method includes that contact foot is connected to the first relay and the second relay between lamps and lanterns input firewire and alternating current firewire respectively
Device, the coil foot of first relay are located at the first transistor collector and power end, and the coil foot of the second relay is located at the
The base stage of the collector and power end of two triodes, first triode and the second triode is connect with microcontroller respectively,
The emitter of first triode and the second triode is connected to ground, and the microcontroller is connected between power supply and ground wire, in institute
It states and is equipped with thermistor between two contact feet of the second relay；
Execution turn on light order when, first controlling the first triode makes the first relay be connected, and the second triode of delays time to control makes
Second relay is connected；Execution turn off the light order when, first control the second triode make the second relay turn off, delay control first again
Triode makes the first relay turn off.
Specifically, the thermistor includes NTC thermistor, the resistance value of the thermistor is 5 Ω.
When order is turned on light in execution, microcontroller first exports high level to the first triode Q1, makes the first relay K1
Conducting exports high level after the first relay K1 conductings, then from microcontroller to the second triode Q2, makes the second relay
Device K2 conductings, i.e. the first relay K1 and the second relay K2 are respectively in microcontroller and the first triode Q1, the second triode
Q2 coordinates lower Delayed conducting, and alternating current firewire can be made to input firewire with lamps and lanterns and form access in this way, realize function of turning on light.
When order is turned off the light in execution, microcontroller first exports low level to the second triode Q2 so that the second relay
K2 is first turned off, and makes the first relay K1 shutdowns after the second relay K2 shutdowns, then to the first triode Q1 outputs low level, i.e.,
First relay K1 and the second relay K2 is delayed under microcontroller and the first triode Q1, the second triode Q2 cooperations respectively
Shutdown can make alternating current firewire input firewire with lamps and lanterns and form open circuit, realize function of turning off the light in this way.
When turning on light, the first relay K1 is first connected, and is connected after the second relay K2, the turn-on time difference root of two relays
It is determined according to the capacitor charging time in LED lamp, that is, the second relay K2 is than one timing of the first relay K1 delays when being connected
Between be connected, which can determine according to capacitor charging time in LED lamp, can be 300mS-800mS.First
The effect that delay is connected with the second relay K2 by relay K1 is after ensureing the first relay K1 conductings, to ensure in LED lamp
After the completion of capacitor charging, then make the second relay K2 conductings.In order to keep the versatility of the switching circuit, preferably by the delay
Time is set as 500mS, and the capacitor charging that this delay time can meet in most LED lamps in the market is completed.
When turning off the light, the second relay K2 is first turned off, and is connected after the second relay K2, the turn-off time difference root of two relays
It is determined according to the capacitor charging time in LED lamp, that is, the first relay K1 is delayed certain time than the second relay K2 when turning off
Conducting, which can determine according to capacitor charging time in LED lamp, can be 300mS-800mS.In order to protect
The versatility of the switching circuit is held, preferably sets the delay time to 500mS, this delay time can meet big absolutely in the market
Capacitor charging in the LED lamp of part is completed.
In the present embodiment, the first relay K1 and the second relay K2 is identical with function using existing phase structure
Relay.The first triode Q1 and the first triode Q2 uses existing phase structure and the identical triode of function.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, it will be understood by those of ordinary skill in the art that：It still can be to aforementioned each implementation
Technical solution recorded in example is modified or equivalent replacement of some of the technical features, and these are changed or replace
It changes, and also makes the spirit and scope of the essence disengaging various embodiments of the present invention technical solution of corresponding technical solution.
Claims (10)
1. a kind of LED lamp switching circuit preventing relay contact ablation, including contact foot are connected to lamps and lanterns input firewire respectively
The coil foot of the first relay between alternating current firewire and the second relay, first relay is located at the first triode current collection
Between pole and power supply, the coil foot of the second relay is located between the collector and power supply of the second triode, the one or three pole
The base stage of pipe and the second triode is connect with microcontroller respectively, and emitter and the ground of the first triode and the second triode connect
Connect, the microcontroller is connected between power supply and ground wire, which is characterized in that second relay two contact feet it
Between be equipped with thermistor；Execution turn on light order when, microcontroller, which controls the first triode, makes the first relay be connected, then the control that is delayed
Making the second triode makes the second relay be connected；Execution turn off the light order when, microcontroller control the second triode control make second
Relay turns off, then the control of the first triode of delays time to control makes the first relay turn off.
2. the LED lamp switching circuit according to claim 1 for preventing relay contact ablation, it is characterised in that：It is described
Thermistor includes NTC thermistor.
3. the LED lamp switching circuit according to claim 2 for preventing relay contact ablation, it is characterised in that：It is described
The resistance value of thermistor is 5 Ω.
4. the LED lamp switching circuit according to claim 1 for preventing relay contact ablation, it is characterised in that：Conducting
When, the second relay is connected than the first relay delay 300mS-800mS；When shutdown, the first relay prolongs than the second relay
When 300mS-800mS turn off.
5. the LED lamp switching circuit according to claim 4 for preventing relay contact ablation, it is characterised in that：It is described
Second relay is turned off than the delay 500mS conductings of the first relay, first relay than the second relay delay 500mS.
6. the LED lamp switching circuit according to claim 4 for preventing relay contact ablation, it is characterised in that：It is described
After the shutdown of second relay after 500mS, the shutdown of the first relay.
7. preventing the LED lamp method of controlling switch of relay contact ablation, including contact foot is connected to lamps and lanterns input firewire respectively
The coil foot of the first relay between alternating current firewire and the second relay, first relay is located at the first triode current collection
Between pole and power supply, the coil foot of the second relay is located between the collector and power supply of the second triode, the one or three pole
The base stage of pipe and the second triode is connect with microcontroller respectively, and emitter and the ground of the first triode and the second triode connect
It connects, which is connected between power supply and ground wire, and thermistor is equipped between two contact feet of the second relay；
Execution turn on light order when, first controlling the first triode makes the first relay be connected, and the second triode of delays time to control makes second
Relay is connected；Execution turn off the light order when, first control the second triode make the second relay turn off, delay control the one or three pole again
Pipe makes the first relay turn off.
8. the LED lamp method of controlling switch according to claim 7 for preventing relay contact ablation, it is characterised in that：
Second relay is closed than the delay 500mS conductings of the first relay, first relay than the second relay delay 500mS
It is disconnected.
9. the LED lamp method of controlling switch according to claim 7 for preventing relay contact ablation, it is characterised in that：
The thermistor includes NTC thermistor.
10. the LED lamp method of controlling switch according to claim 9 for preventing relay contact ablation, it is characterised in that：
The resistance value of the thermistor is 5 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810236171.2A CN108307565A (en) | 2018-03-21 | 2018-03-21 | A kind of LED lamp switching circuit and control method preventing relay contact ablation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810236171.2A CN108307565A (en) | 2018-03-21 | 2018-03-21 | A kind of LED lamp switching circuit and control method preventing relay contact ablation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108307565A true CN108307565A (en) | 2018-07-20 |
Family
ID=62850328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810236171.2A Pending CN108307565A (en) | 2018-03-21 | 2018-03-21 | A kind of LED lamp switching circuit and control method preventing relay contact ablation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108307565A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110649677A (en) * | 2019-09-30 | 2020-01-03 | 中国船舶重工集团公司第七0七研究所 | Automatic power-off protection device for storage battery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104427677A (en) * | 2013-08-20 | 2015-03-18 | 海洋王（东莞）照明科技有限公司 | Low-voltage safety switching circuit for lamps |
| CN205509847U (en) * | 2016-03-16 | 2016-08-24 | 广州视源电子科技股份有限公司 | Switching power supply relay start circuit |
-
2018
- 2018-03-21 CN CN201810236171.2A patent/CN108307565A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104427677A (en) * | 2013-08-20 | 2015-03-18 | 海洋王（东莞）照明科技有限公司 | Low-voltage safety switching circuit for lamps |
| CN205509847U (en) * | 2016-03-16 | 2016-08-24 | 广州视源电子科技股份有限公司 | Switching power supply relay start circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110649677A (en) * | 2019-09-30 | 2020-01-03 | 中国船舶重工集团公司第七0七研究所 | Automatic power-off protection device for storage battery |
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Application publication date: 20180720 |
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