CN209298014U - Prevent relay from the new type of relay control circuit of attracting state always occur - Google Patents
Prevent relay from the new type of relay control circuit of attracting state always occur Download PDFInfo
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- CN209298014U CN209298014U CN201920139982.0U CN201920139982U CN209298014U CN 209298014 U CN209298014 U CN 209298014U CN 201920139982 U CN201920139982 U CN 201920139982U CN 209298014 U CN209298014 U CN 209298014U
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- triode
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Abstract
The utility model discloses a kind of new type of relay control circuits for preventing relay from attracting state always occur, including a MCU chip, a relay operating circuit module and the high level drive circuit module for being connected to relay operating circuit module, it further include the capacitance coupling circuit module and a capacitor energy storage circuit module being connected, wherein, the capacitance coupling circuit module is connected to the output end of MCU chip, which connect with high level drive circuit module.The new type of relay control circuit provided by the utility model for preventing relay from attracting state always occur, when unexpected crash occurs in MCU chip, relay is not in be attracted the case where can not disconnecting always, thereby guarantees that the normal work of relay.
Description
Technical field
The utility model relates to integrated circuit fields more particularly to a kind of prevent relay from the new of attracting state always occur
Type control relay circuit.
Background technique
In the prior art, to the drive control of relay, usually using conventional high level driving circuit and MCU chip
It combines, when MCU chip exports high level, relay is attracted；Conversely, relay is disconnected when MCU chip exports low level
It opens.Once however, MCU chip occur it is unexpected crash, MCU chip output level is uncertain, if there is high level, then relay
It will be in the state being attracted always, and can not disconnected, then influences the normal work of relay.
Utility model content
In view of the above deficiencies, prevent relay from attracting state always occur the purpose of this utility model is to provide a kind of
New type of relay control circuit, when unexpected crash occurs in MCU chip, relay is not in the feelings that actuation can not disconnect always
Condition thereby guarantees that the normal work of relay.
Used technical solution is the utility model in order to achieve the above objectives:
A kind of new type of relay control circuit for preventing relay from attracting state always occur, including a MCU chip, one after
Electrical work circuit module and the high level drive circuit module for being connected to relay operating circuit module, which is characterized in that
It further include the capacitance coupling circuit module and a capacitor energy storage circuit module being connected, wherein the capacitance coupling circuit module
It is connected to the output end of MCU chip, which connect with high level drive circuit module.
The capacitance coupling circuit module includes capacitor C1, resistance R1 and three as a further improvement of the utility model,
Pole pipe Q1, wherein the base stage of triode Q1 is respectively connected to the one end capacitor C1 and the one end resistance R1, and the capacitor C1 other end connects
It is connected to the output end of MCU chip, the resistance R1 other end is connected to the emitter of triode Q1, and the collector of triode Q1 connects
It is connected to capacitor energy storage circuit module.
The capacitor energy storage circuit module includes resistance R2 and electrolytic capacitor as a further improvement of the utility model,
EC1, wherein the one end resistance R2 is connected to the collector of triode Q1, and the resistance R2 other end is respectively connected to electrolytic capacitor
Anode and the high level drive circuit module of EC1.
As a further improvement of the utility model, the high level drive circuit module include resistance R3, resistance R4 with
Triode Q2, wherein the base stage of triode Q2 is connected to the one end resistance R3, and the resistance R3 other end is respectively connected to resistance R4
One end and the resistance R2 other end；The emitter of triode Q2 is respectively connected to the negative of the resistance R4 other end and electrolytic capacitor EC1
Pole；The collector of triode Q2 is connected to relay operating circuit module.
The relay operating circuit module includes relay RLY1 and two poles as a further improvement of the utility model,
Pipe D1, wherein the one end relay RLY1 is connect with the cathode of diode D1, and the relay RLY1 other end is respectively connected to two
The collector of the anode and triode Q2 of pole pipe D1.
The P2.1 pin of the MCU chip is connected to electricity by a resistance R5 as a further improvement of the utility model,
Hold the capacitor C1 of coupling circuit module.
The utility model has the following beneficial effects: by adding capacitor between MCU chip and high level drive circuit module
Coupling circuit module and capacitor energy storage circuit module, by the coupling and capacitor energy storage circuit module of capacitance coupling circuit module
Energy storage effect so that the waveform that MCU chip only exports certain frequency can just be such that relay is attracted, only export high level
Or low level can not be such that relay is attracted.Therefore, when unexpected crash occurs in MCU chip, MCU chip will not export certain frequency
Waveform, then relay can not occur being attracted the case where can not disconnecting always, thereby guarantee that the normal work of relay.
Above-mentioned is the general introduction of utility model technical solution, below in conjunction with attached drawing and specific embodiment, to the utility model
It is described further.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model.
Specific embodiment
Further to illustrate that the utility model is the technical means and efficacy for reaching predetermined purpose and being taken, below in conjunction with
Specific embodiment of the present utility model is described in detail in attached drawing and preferred embodiment.
Please refer to Fig. 1, the utility model embodiment provide it is a kind of prevent relay occur attracting state always it is novel after
Electrical apparatus control circuit including a MCU chip, a relay operating circuit module and is connected to relay operating circuit module
One high level drive circuit module.The present embodiment new type of relay control circuit further includes the capacitance coupling circuit mould being connected
Block and a capacitor energy storage circuit module, wherein the capacitance coupling circuit module is connected to the output end of MCU chip, capacitor storage
Energy circuit module is connect with high level drive circuit module.
Specifically, the capacitance coupling circuit module includes capacitor C1, resistance R1 and triode Q1, wherein the triode
The base stage of Q1 is respectively connected to the one end capacitor C1 and the one end resistance R1, and the capacitor C1 other end is connected to the output end of MCU chip,
The resistance R1 other end is connected to the emitter of triode Q1, and the collector of triode Q1 is connected to capacitor energy storage circuit mould
Block.
Specifically, the capacitor energy storage circuit module includes resistance R2 and electrolytic capacitor EC1, wherein the one end resistance R2
It is connected to the collector of triode Q1, the resistance R2 other end is respectively connected to the anode of electrolytic capacitor EC1 and high level drives
Circuit module.
Specifically, the high level drive circuit module includes resistance R3, resistance R4 and triode Q2, wherein three pole
The base stage of pipe Q2 is connected to the one end resistance R3, and the resistance R3 other end is respectively connected to the one end resistance R4 and the resistance R2 other end；
The emitter of triode Q2 is respectively connected to the cathode of the resistance R4 other end Yu electrolytic capacitor EC1；The current collection of triode Q2
Pole is connected to relay operating circuit module.
Specifically, the relay operating circuit module includes relay RLY1 and diode D1, wherein the relay
The one end RLY1 is connect with the cathode of diode D1, and the relay RLY1 other end is respectively connected to anode and three poles of diode D1
The collector of pipe Q2.
Specifically, the P2.1 pin of the MCU chip is connected to the capacitor of capacitance coupling circuit module by a resistance R5
C1。
New type of relay control circuit provided in this embodiment, in practical applications, can play prevents relay from occurring one
The effect of straight attracting state.Specifically, by adding capacitance coupling circuit between MCU chip and high level drive circuit module
Module and capacitor energy storage circuit module are made by the coupling of capacitance coupling circuit module and the energy storage of capacitor energy storage circuit module
With only exporting high level or low level so that the waveform that MCU chip only exports certain frequency can just be such that relay is attracted
Relay can not be made to be attracted.Therefore, when unexpected crash occurs in MCU chip, MCU chip will not export the waveform of certain frequency,
Then relay can not occur being attracted the case where can not disconnecting always, thereby guarantee that the normal work of relay.
The above descriptions are merely preferred embodiments of the present invention, not makees to the technical scope of the utility model
Any restrictions, therefore technical characteristic identical or approximate with the utility model above-described embodiment is used, and obtained other structures,
It is within the protection scope of the utility model.
Claims (6)
1. a kind of new type of relay control circuit for preventing relay from attracting state always occur, including a MCU chip, a relay
Device operating circuit module and the high level drive circuit module for being connected to relay operating circuit module, which is characterized in that also
Including the capacitance coupling circuit module and a capacitor energy storage circuit module being connected, wherein the capacitance coupling circuit module connects
It is connected to the output end of MCU chip, which connect with high level drive circuit module.
2. the new type of relay control circuit according to claim 1 for preventing relay from attracting state always occur, special
Sign is that the capacitance coupling circuit module includes capacitor C1, resistance R1 and triode Q1, wherein the base stage of triode Q1
It is respectively connected to the one end capacitor C1 and the one end resistance R1, the capacitor C1 other end is connected to the output end of MCU chip, resistance R1
The other end is connected to the emitter of triode Q1, and the collector of triode Q1 is connected to capacitor energy storage circuit module.
3. the new type of relay control circuit according to claim 2 for preventing relay from attracting state always occur, special
Sign is that the capacitor energy storage circuit module includes resistance R2 and electrolytic capacitor EC1, wherein the one end resistance R2 is connected to three
The collector of pole pipe Q1, the resistance R2 other end are respectively connected to the anode and high level drive circuit module of electrolytic capacitor EC1.
4. the new type of relay control circuit according to claim 3 for preventing relay from attracting state always occur, special
Sign is that the high level drive circuit module includes resistance R3, resistance R4 and triode Q2, wherein the base of triode Q2
Pole is connected to the one end resistance R3, and the resistance R3 other end is respectively connected to the one end resistance R4 and the resistance R2 other end；The triode
The emitter of Q2 is respectively connected to the cathode of the resistance R4 other end Yu electrolytic capacitor EC1；The collector of triode Q2 is connected to
Relay operating circuit module.
5. the new type of relay control circuit according to claim 4 for preventing relay from attracting state always occur, special
Sign is that the relay operating circuit module includes relay RLY1 and diode D1, wherein the one end relay RLY1 with
The cathode of diode D1 connects, and the relay RLY1 other end is respectively connected to the current collection of the anode and triode Q2 of diode D1
Pole.
6. the new type of relay control circuit according to claim 2 for preventing relay from attracting state always occur, special
Sign is that the P2.1 pin of the MCU chip is connected to the capacitor C1 of capacitance coupling circuit module by a resistance R5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920139982.0U CN209298014U (en) | 2019-01-28 | 2019-01-28 | Prevent relay from the new type of relay control circuit of attracting state always occur |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920139982.0U CN209298014U (en) | 2019-01-28 | 2019-01-28 | Prevent relay from the new type of relay control circuit of attracting state always occur |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209298014U true CN209298014U (en) | 2019-08-23 |
Family
ID=67642569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920139982.0U Active CN209298014U (en) | 2019-01-28 | 2019-01-28 | Prevent relay from the new type of relay control circuit of attracting state always occur |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209298014U (en) |
-
2019
- 2019-01-28 CN CN201920139982.0U patent/CN209298014U/en active Active
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