CN108695833A - Vehicle-mounted relay protection control circuit in 24V bodywork systems and method - Google Patents
Vehicle-mounted relay protection control circuit in 24V bodywork systems and method Download PDFInfo
- Publication number
- CN108695833A CN108695833A CN201810703281.5A CN201810703281A CN108695833A CN 108695833 A CN108695833 A CN 108695833A CN 201810703281 A CN201810703281 A CN 201810703281A CN 108695833 A CN108695833 A CN 108695833A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000003111 delayed effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 238000010923 batch production Methods 0.000 abstract description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/222—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices for switches
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- Relay Circuits (AREA)
Abstract
The invention discloses the vehicle-mounted relays in 24V bodywork systems, and control circuit and method, the base stage and microcontroller relay control signal output end of triode to be protected to connect, and one end of collector and relay coil connects, emitter ground connection;The anode of first protection diode and one end of the collector of triode and relay coil connect; one end of the cathode of first protection diode and the other end of relay coil, divider resistance connects, and the normally opened contact of the divider resistance other end and relay connects+24V power supplys;The anode of the drain electrode of MOSFET pipes and the normally-closed contact of relay, the second protection diode connects, the common end of the cathode relay of the second protection diode;The source electrode of MOSFET pipes is grounded, and grid connects the MOSFET pipe control signal outputs of microcontroller.Although to can effectively solve the problem that existing routine 12V relays many by the present invention, it cannot use in 24V systems, 24V has a special 24V relays, but of high cost, less varieties, the problem of being unfavorable for batch production.
Description
Technical field
The present invention relates to the vehicle-mounted relays in vehicle-mounted relay protection field more particularly to 24V bodywork systems to protect control
Circuit processed and method.
Background technology
With the development of auto industry in recent years, the raising of automotive electronics voltage, the voltage class that relay requires is continuous
It is promoted.
Currently, the guard method of vehicle-mounted relay control circuit 12V conventional relays is in the majority, relay in 24V bodywork systems
Device application is seldom, protects circuit incomplete.
Relay contact is easily caused using relay to damage, influence product service life in 24V systems.
The special purpose relay of 24V systems, few on the market at present, higher price are unfavorable for batch and use.
Although in conclusion there are many routine 12V relays, cannot use in 24V systems, 24V also has special
24V relays, but of high cost, less varieties, are unfavorable for producing in batches.
Invention content
The object of the present invention is to provide the vehicle-mounted relay protection control circuit and control method in 24V bodywork systems, solutions
Although there are many certainly existing routine 12V relays, cannot use in 24V systems, 24V also has special 24V relays,
But of high cost, less varieties, the problem of being unfavorable for producing in batches.
The technical solution adopted by the present invention to solve the technical problems is:Vehicle-mounted relay protection in 24V bodywork systems
Control circuit, including microcontroller, relay, MOSFET pipe ,+24V power supplys, triode, the first protection diode, the second protection two
Pole pipe, divider resistance, the base stage and microcontroller relay control signal output end of triode connect, collector and relay line
One end of circle connects, emitter ground connection;The anode of first protection diode and the collector of triode and relay coil
One end connects, and one end of the cathode of the first protection diode and the other end of relay coil, divider resistance connects, divider resistance
The normally opened contact of the other end and relay connects+24V power supplys;The drain electrode of MOSFET pipes and the normally-closed contact of relay, the second protection
The anode of diode connects, the common end of the cathode relay of the second protection diode;The source electrode of MOSFET pipes is grounded, grid
Connect the MOSFET pipe control signal outputs of microcontroller.
Further, relay is double born of the same parents' relays, and triode includes the first triode, the second triode, the first protection
Diode includes the first diode, the second diode, and the second protection diode includes third diode, the 4th diode;Monolithic
There are two relay control signal output ends, the respectively base stage with the base stage of the first triode, the second triode to connect for machine setting;
First diode and the second diode are connected in parallel on respectively on the both ends of two coils of double born of the same parents' relays;Third diode is just
The drain electrode of anode and MOSFET pipes of pole, the 4th diode connects;The cathode of the cathode of third diode and the 4th diode and
Correspondence connects respectively for two common ends of double born of the same parents' relays;Two normally-closed contacts of double born of the same parents' relays and the drain electrode phase of effect pipe
It connects, two normally opened contact connects+24V power supplys.
Further, relay is unit cell relay, and triode includes the first triode, and the first protection diode includes the
One diode, the second protection diode include third diode;The relay control signal output end and first of microcontroller setting
The base stage of triode connects;First diodes in parallel is on the both ends of two coils of unit cell relay;Third diode is just
The drain electrode of pole and MOSFET pipes connects;The cathode of third diode and the common end of unit cell relay connect;Unit cell relay
The drain electrode of normally-closed contact and effect pipe connects, and normally opened contact connects+24V power supplys.
Further, MOSFET pipes can be replaced with IGBT pipes.
Vehicle-mounted relay in 24V bodywork systems protects control method, and double born of the same parents' relays are in attracting process, monolithic first
Machine exports control signal to the first triode and the second triode, controls double born of the same parents' relays and is attracted, after relay is attracted, is delayed to
After the time value of setting, microcontroller exports control signal and is managed to MOSFET, control MOSFET pipes conducting;
Double born of the same parents' relays are in disconnection process, and microcontroller disconnects the control signal of MOSFET pipes first, and MOSFET pipes is made to close
It is disconnected, when being then delayed to setting after, microcontroller disconnects the control signal of double born of the same parents' relays again.
Beneficial effects of the present invention:Realize that 12V relays are extended to 24V systems by the cooperation of relay and MOSFET pipes
Application cannot be used in 24V systems, 24V also has specially although it is many to solve existing routine 12V relays
24V relays, but of high cost, less varieties, are provided simultaneously with simple in structure at the problem of being unfavorable for batch production, and performance is stablized
Reliable advantage.
Below with reference to drawings and examples, the present invention is described in detail.
Description of the drawings
Fig. 1 is the circuit diagram of the present invention.
Specific implementation mode
Embodiment, the vehicle-mounted relay in 24V bodywork systems as shown in Figure 1 protect control circuit, including single-chip microprocessor MCU,
Relay, MOSFET pipes ,+24V power supplys, triode, the first protection diode, the second protection diode, divider resistance R1, three poles
The base stage and single-chip microprocessor MCU relay control signal output end of pipe connect, and one end of collector and relay coil connects,
Emitter is grounded;The anode of first protection diode and one end of the collector of triode and relay coil connect, and first protects
One end of the cathode and the other end of relay coil, divider resistance R1 that protect diode connects, the divider resistance R1 other ends and after
The normally opened contact of electric appliance connects+24V power supplys;The drain electrode of MOSFET pipes and the normally-closed contact of relay, the second protection diode are just
Pole connects, the common end of the cathode relay of the second protection diode;The source electrode of MOSFET pipes is grounded, and grid connects microcontroller
The MOSFET pipe control signal outputs of MCU.
Relay is double born of the same parents' relays, and triode includes the first triode Q1, the second triode Q2, the first protection diode
Including the first diode D1, the second diode D2, the second protection diode includes third diode D3, the 4th diode D4;It is single
There are two relay control signal output ends for piece machine MCU setting, respectively with the base stage of the first triode Q1, the second triode Q2
Base stage connects;First diode D1 and the second diode D2 is connected in parallel on respectively on the both ends of two coils of double born of the same parents' relays;The
The drain electrode of the anode of three diode D3, the anode and MOSFET pipes of the 4th diode D4 connects;The cathode of third diode D3 and
Correspondence connects respectively for two common ends of the cathode of the 4th diode D4 and double born of the same parents' relays;Two of double born of the same parents' relays are normally closed tactile
The drain electrode of point and effect pipe connects, two normally opened contact connects+24V power supplys.
Relay is unit cell relay, and triode includes the first triode Q1, and the first protection diode includes the one or two pole
Pipe D1, the second protection diode include third diode D3;The relay control signal output end and first of single-chip microprocessor MCU setting
The base stage of triode Q1 connects;First diode D1 is connected in parallel on the both ends of two coils of unit cell relay;Third diode
The drain electrode of the anode and MOSFET pipes of D3 connects;The cathode of third diode D3 and the common end of unit cell relay connect;Unit cell
The drain electrode of the normally-closed contact and effect pipe of relay connects, and normally opened contact connects+24V power supplys.MOSFET pipes can be replaced with IGBT pipes
It changes.
Vehicle-mounted relay in 24V bodywork systems protects control method, and double born of the same parents' relays are in attracting process, monolithic first
Machine MCU exports control signal to the first triode Q1 and the second triode Q2, controls double born of the same parents' relays and is attracted, relay is attracted
Afterwards, after being delayed to the time value of setting, single-chip microprocessor MCU exports control signal and is managed to MOSFET, control MOSFET pipes conducting;In this way
In the attracting process of double born of the same parents' relays, double born of the same parents' relays realize that zero currents are attracted, the double born of the same parents' relay contacts of effective protection by
The impact of electric current;
For double born of the same parents' relays in disconnection process, single-chip microprocessor MCU disconnects the control signal of MOSFET pipes first, and MOSFET is made to manage
Shutdown, when being then delayed to setting after, single-chip microprocessor MCU disconnects the control signal of double born of the same parents' relays again;Double born of the same parents have been achieved
The zero-current switching of relay, the contact for the double born of the same parents' relays of electric arc damage that the double born of the same parents' relays of effective protection occur when disconnecting.
First triode Q1, the second triode Q2 are double born of the same parents' relay coils in order to protect double born of the same parents' relays when disconnecting
The peak absorbing circuit that the high pressure spike damage single-chip microprocessor MCU that both ends occur is done.Two the three or two poles of MOSFET pipes above
When the cathode of pipe D3 and the 4th diode D4 are that double born of the same parents' relays are with inductive load in order to prevent, the reversed electricity of inductive load appearance
The freewheeling circuit that kinetic potential damage MOSFET pipes are done, to protect MOSFET to manage.Divider resistance above double born of the same parents' relays, be in order to
Make coil bleeder circuit added in conventional double born of the same parents' relay applications to 24V systems of 12V, protect the conventional couple of born of the same parents of 12V after
The normal work of electric appliance double born of the same parents' relay coils in the application of 24V systems.Above-mentioned double born of the same parents' relays can use unit cell relay
It replaces, then proposes redundance circuit.
The present invention is exemplarily described above in association with attached drawing.Obviously, present invention specific implementation is not by above-mentioned side
The limitation of formula.As long as using the improvement of the various unsubstantialities of inventive concept and technical scheme of the present invention progress;Or not
It is improved, the above-mentioned design of the present invention and technical solution are directly applied into other occasions, in protection scope of the present invention
Within.
Claims (5)
- Vehicle-mounted relay in 1.24V bodywork systems protects control circuit, it is characterised in that:Including microcontroller (MCU), relay Device, MOSFET pipes ,+24V power supplys, triode, the first protection diode, the second protection diode, divider resistance (R1), triode Base stage and microcontroller (MCU) relay control signal output end connect, one end of collector and relay coil connects, Emitter is grounded;The anode of first protection diode and one end of the collector of triode and relay coil connect, and first protects The one end for protecting the cathode of diode and the other end of relay coil, divider resistance (R1) connects, divider resistance (R1) other end And the normally opened contact of relay connects+24V power supplys;The drain electrode of MOSFET pipes and the normally-closed contact of relay, the second protection diode Anode connect, the common end of the cathode contact relay of the second protection diode;The source electrode of MOSFET pipes is grounded, grid order The MOSFET pipe control signal outputs of piece machine (MCU).
- 2. the vehicle-mounted relay in 24V bodywork systems according to claim 1 protects control circuit, it is characterised in that:After Electric appliance is double born of the same parents' relays, and triode includes the first triode (Q1), the second triode (Q2), and the first protection diode includes the One diode (D1), the second diode (D2), the second protection diode include third diode (D3), the 4th diode (D4); Microcontroller (MCU) setting there are two relay control signal output end, respectively with the base stage of the first triode (Q1), the two or three pole The base stage of pipe (Q2) connects;First diode (D1) and the second diode (D2) are connected in parallel on two coils of double born of the same parents' relays respectively Both ends on;Positive and MOSFET pipes the drain electrode of the anode of third diode (D3), the 4th diode (D4) connects;Three or two Correspondence connects respectively for two common ends of the cathode of the cathode of pole pipe (D3) and the 4th diode (D4) and double born of the same parents' relays;Double born of the same parents The drain electrode of two normally-closed contacts and effect pipe of relay connects, two normally opened contact connects+24V power supplys.
- 3. the vehicle-mounted relay in 24V bodywork systems according to claim 1 protects control circuit, it is characterised in that:After Electric appliance is unit cell relay, and triode includes the first triode (Q1), and the first protection diode includes the first diode (D1), the Two protection diodes include third diode (D3);The relay control signal output end and the one or three of microcontroller (MCU) setting The base stage of pole pipe (Q1) connects;First diode (D1) is connected in parallel on the both ends of two coils of unit cell relay;Three or two pole The drain electrode of the anode and MOSFET pipes of pipe (D3) connects;The cathode of third diode (D3) and the common end phase of unit cell relay It connects;The drain electrode of the normally-closed contact and effect pipe of unit cell relay connects, and normally opened contact connects+24V power supplys.
- 4. the vehicle-mounted relay in the 24V bodywork systems according to claims 1 to 3 any one protects control circuit, It is characterized in that:MOSFET pipes can be replaced with IGBT pipes.
- Vehicle-mounted relay in 5.24V bodywork systems protects control method, it is characterised in that:Double born of the same parents' relays are in attracting process, and microcontroller (MCU) exports control signal to the first triode (Q1) and second first Triode (Q2) controls double born of the same parents' relays and is attracted, after double born of the same parents' relays are attracted, after being delayed to the time value of setting, and microcontroller (MCU) it exports control signal to manage to MOSFET, control MOSFET pipes conducting;Double born of the same parents' relays are in disconnection process, and microcontroller (MCU) disconnects the control signal of MOSFET pipes first, and MOSFET pipes is made to close It is disconnected, when being then delayed to setting after, microcontroller (MCU) disconnects the control signal of double born of the same parents' relays again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810703281.5A CN108695833A (en) | 2018-06-30 | 2018-06-30 | Vehicle-mounted relay protection control circuit in 24V bodywork systems and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810703281.5A CN108695833A (en) | 2018-06-30 | 2018-06-30 | Vehicle-mounted relay protection control circuit in 24V bodywork systems and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108695833A true CN108695833A (en) | 2018-10-23 |
Family
ID=63850485
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810703281.5A Pending CN108695833A (en) | 2018-06-30 | 2018-06-30 | Vehicle-mounted relay protection control circuit in 24V bodywork systems and method |
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| CN (1) | CN108695833A (en) |
Cited By (3)
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| CN110984766A (en) * | 2019-12-11 | 2020-04-10 | 深圳南方德尔汽车电子有限公司 | Relay control circuit of electric vehicle window and control method thereof |
| CN113394751A (en) * | 2021-06-16 | 2021-09-14 | 东风电子科技股份有限公司 | Circuit system and method for realizing vehicle motor driving and self-protection |
| CN115142757A (en) * | 2022-06-23 | 2022-10-04 | 东方久乐汽车电子（上海）股份有限公司 | Electric tail gate control circuit and protection circuit |
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|---|---|---|---|---|
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| CN113394751A (en) * | 2021-06-16 | 2021-09-14 | 东风电子科技股份有限公司 | Circuit system and method for realizing vehicle motor driving and self-protection |
| CN115142757A (en) * | 2022-06-23 | 2022-10-04 | 东方久乐汽车电子（上海）股份有限公司 | Electric tail gate control circuit and protection circuit |
| CN115142757B (en) * | 2022-06-23 | 2023-08-04 | 东方久乐汽车电子（上海）股份有限公司 | Electric tail gate control circuit and protection circuit |
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