CN220527679U - Signal driving circuit for arc extinction - Google Patents
Signal driving circuit for arc extinction Download PDFInfo
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- CN220527679U CN220527679U CN202321726466.0U CN202321726466U CN220527679U CN 220527679 U CN220527679 U CN 220527679U CN 202321726466 U CN202321726466 U CN 202321726466U CN 220527679 U CN220527679 U CN 220527679U
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- 230000008033 biological extinction Effects 0.000 title claims abstract description 13
- 239000003990 capacitor Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
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- 238000005265 energy consumption Methods 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Abstract
The utility model provides a signal driving circuit for arc extinction, which comprises a driving chip U5, a load power supply circuit, a load driving circuit and a signal power supply circuit, wherein a 2 nd pin of the driving chip U5 is connected with the signal power supply circuit; the 7 th pin and the 8 th pin of the driving chip U5 are connected with a load power supply circuit; the 1 st pin and the 4 th pin of the driving chip U5 are connected in an empty way; the 3 rd pin and the 5 th pin of the driving chip U5 are grounded; the 6 th pin of the driving chip U5 is connected with a load driving circuit, and the load power supply circuit is also connected with the 6 th pin of the driving chip U5; the signal power supply circuit is used for receiving a switching signal of the main control chip U6; the load driving circuit is externally connected with a switch circuit; the signal power supply circuit is externally connected with a first power supply, the load driving circuit and the load power supply circuit are externally connected with a second power supply, the first power supply is larger than the second power supply, and the circuit reliability is good.
Description
Technical Field
The utility model relates to the field of electronic circuits, in particular to a signal driving circuit for arc extinction.
Background
In the operation of the electric device, because it generally provides higher voltage, in some special cases, the switching process needs to be performed on the circuit in time, and in the switching process, if the switching process is performed under the condition of high voltage, the condition that sparks and damages easily occur will be caused, so that the actuation and breaking arc extinguishing process is particularly important, therefore, in the existing arc extinguishing circuit, zero crossing detection needs to be performed, and the power supply cutting operation is performed after the zero crossing is detected.
For example, the Chinese patent application number is 201210573317.5 and publication date is 2013.03.20, which discloses a self-resetting over-under-voltage protector capable of realizing zero-crossing point combination and zero-crossing point separation, comprising a central processing unit, a control module, a power supply module, a relay module and a voltage and current acquisition circuit; the relay module comprises a magnetic latching relay, a contact of the magnetic latching relay is connected in series on a 220VAC power phase line, the current signal acquisition circuit comprises a current transformer, the current transformer is composed of a coil and an open-type magnetic ring, when the alternating voltage is normal, the central processing unit sends an actuation signal to the relay module at the time t3 when acquiring the first zero crossing point of the alternating voltage, and the actuation signal is actuated right when the zero crossing point of the alternating voltage after the actuation response time of the relay; when the voltage is abnormal, the central processing unit sends a breaking signal to the relay module at the time t4 after collecting the zero crossing point of the first alternating current, and the breaking signal is just broken at the zero crossing point of the alternating current after the response time of breaking the relay; the non-arc breaking makes contact material not ablated, contact resistance between contacts is small, energy consumption is reduced, electric life is high, mechanical life is high, and meanwhile interphase short circuit problem caused by arc is avoided. However, the control circuit of the circuit only realizes the opening and closing of the relay through two optocoupler switches, but the relay is conducted through the optocoupler switches only with smaller voltage, and the relay can not be controlled by the switch with higher voltage, and the relay has a certain delay in the opening and closing of the switch due to delay, so that the control effect is poor.
Disclosure of Invention
The utility model provides a signal driving circuit for arc extinction; the switching circuit may be powered by a high voltage driven by a low voltage control signal.
In order to achieve the above purpose, the technical scheme of the utility model is as follows: the signal driving circuit for arc extinction comprises a driving chip U5, a load power supply circuit, a load driving circuit and a signal power supply circuit, wherein a 2 nd pin of the driving chip U5 is connected with the signal power supply circuit; the 7 th pin and the 8 th pin of the driving chip U5 are connected with a load power supply circuit; the 1 st pin and the 4 th pin of the driving chip U5 are connected in an empty way; the 3 rd pin and the 5 th pin of the driving chip U5 are grounded; the 6 th pin of the driving chip U5 is connected with a load driving circuit, and the load power supply circuit is also connected with the 6 th pin of the driving chip U5; the signal power supply circuit is used for receiving a switching signal of the main control chip U6; the load driving circuit is externally connected with a switch circuit; the signal power supply circuit is externally connected with a first power supply, the load driving circuit and the load power supply circuit are externally connected with a second power supply, the first power supply is larger than the second power supply, and the driving chip U5 is used for enabling the output voltage of the chip to be high level and driving the load power supply circuit to be conducted and supplying power to the switch circuit when the signal power supply circuit supplies voltage to the chip.
The circuit transmits a driving signal to the 1 st pin of the triode Q1 through the main control chip U6, so that the 2 nd pin and the 3 rd pin of the triode are conducted, a first power supply outputs a voltage signal to the 2 nd pin of the driving chip U5, the 6 th pin of the driving chip U5 can transmit the 1 st pin of the driving signal triode Q3, the 2 nd pin and the 3 rd pin of the triode Q3 are conducted, and therefore the second power supply can output a voltage signal to the switching circuit to drive the switching circuit to work. The high voltage is thereby controlled to power the load by the control signal that is issued at a low voltage, thereby enabling the load to operate with the high voltage while preventing the higher voltage from potentially damaging the control elements.
Further, the signal power supply circuit comprises a triode Q1, a resistor R24, a resistor R7, a resistor R6 and a resistor R57, wherein a 3 rd pin of the triode Q1 is connected with a 2 nd pin of the driving chip U5 through the resistor R24; the 1 st pin of the triode Q1 is externally connected with a main control chip U6 through a resistor R57; the 2 nd pin of the triode Q1 is connected with a first power supply; the 2 nd pin of the triode Q1 is also connected with a first power supply through a resistor R7; the 3 rd pin of the triode Q1 is grounded through a resistor R6.
Above setting, through detecting the circuit anomaly and sending low level signal when zero crossing at main control chip U6 makes triode Q1 switch on, then triode Q1's collecting electrode output high level signal makes driving chip switch on, and circuit structure is simple can realize switching on.
Further, the load driving circuit comprises a triode Q3, a resistor R18 and a resistor R17, the 1 st pin of the triode Q3 is connected with the 6 th pin of the driving chip U5, and the 2 nd pin of the triode Q3 is grounded; the 3 rd pin of the triode Q3 is connected with a second power supply through a resistor R17, and the 3 rd pin of the triode Q3 is externally connected with a switch circuit; the 1 st pin of the triode Q3 is also grounded through a resistor R18.
With the above arrangement, when the driving chip U5 outputs a high level signal to turn on the transistor Q3, then the high level signal at the collector of the transistor Q3 supplies power to the switching circuit.
Further, the load power supply circuit comprises a resistor R3, a resistor R4 and a capacitor C5, and a 7 th pin of the driving chip U5 is connected with a second power supply through the resistor R3; the 8 th pin of the driving chip U5 is connected with a second power supply; one end of the capacitor C5 is connected with a 12V power supply, and the other end of the capacitor C5 is grounded; the 6 th pin of the driving chip U5 is connected with a second power supply through a resistor R4.
Above setting, the second power supply is through 8 th pin for the chip U5 power supply on the one hand, and on the other hand forms the reference voltage of chip U5 after carrying out the bleeder voltage through voltage R3, then guarantees through resistance R4 that chip U5 output voltage is too big or undersize, filters the second power supply of input through electric capacity C5.
Further, the first power supply is 3.3V, and the second power supply is 12V.
By the arrangement, the switching circuit similar to a plurality of MOS tubes can be driven by a small power supply, and the switching circuit can be started better and faster.
Further, the driving chip U5 further comprises a light emitting diode D1, an AND gate and a triode Q4, the positive electrode of the light emitting diode D1 is connected with the 2 nd pin of the chip U5, the negative electrode of the light emitting diode D1 is connected with the 3 rd pin of the driving chip U5, the base electrode of the triode Q4 is connected with the 6 th pin of the driving chip U5, the emitting electrode of the triode Q4 is grounded, the base electrode of the triode Q4 is connected with the output end of the AND gate, and the AND gate is connected with the 7 th pin of the driving chip U5.
Above setting, when emitting diode D1 switches on, its and the other link of AND gate namely the 7 th pin AND gate of chip U5 makes the AND gate produce high voltage output afterwards, then makes triode Q4 switch on, then triode Q4's collecting electrode produces high voltage signal and makes triode Q3 switch on to make triode Q3 can provide big voltage signal for switch circuit, circuit structure is simple.
Drawings
Fig. 1 is a schematic diagram of a signal driving circuit according to the present utility model.
FIG. 2 is a block diagram of the connection of the present utility model with a controller and a switch circuit.
Detailed Description
The utility model is described in further detail below with reference to the drawings and the detailed description.
As shown in fig. 1 and 2; the signal driving circuit for arc extinction comprises a driving chip U5, a load power supply circuit 1, a load driving circuit 2 and a signal power supply circuit 3, wherein a 2 nd pin of the driving chip U5 is connected with the signal power supply circuit 3; the 7 th pin and the 8 th pin of the driving chip U5 are connected with the load power supply circuit 1; the 1 st pin and the 4 th pin of the driving chip U5 are connected in an empty way; the 3 rd pin and the 5 th pin of the driving chip U5 are grounded; the 6 th pin of the driving chip U5 is connected with the load driving circuit 2, and the load power supply circuit 1 is also connected with the 6 th pin of the driving chip U5; the signal power supply circuit 3 is used for receiving a switch signal of the main control chip U6; the load driving circuit 2 is externally connected with a switch circuit; the signal power supply circuit 1 is externally connected with a first power supply, the load driving circuit 2 and the load power supply circuit 3 are externally connected with a second power supply, the first power supply is larger than the second power supply, and the driving chip U5 is used for enabling the output voltage of the chip to be high level and driving the load power supply circuit to be conducted and supplying power to the switch circuit when the signal power supply circuit supplies voltage to the chip. In this embodiment, the first power supply is 3.3V, and the second power supply is 12V. The driving chip U5 further comprises a light emitting diode D1, an AND gate and a triode Q4, wherein the positive electrode of the light emitting diode D1 is connected with the 2 nd pin of the chip U5, the negative electrode of the light emitting diode D1 is connected with the 3 rd pin of the driving chip U5, the base electrode of the triode Q4 is connected with the 6 th pin of the driving chip U5, the emitting electrode of the triode Q4 is grounded, the base electrode of the triode Q4 is connected with the output end of the AND gate, and the AND gate is connected with the 7 th pin of the driving chip U5. In this embodiment, the model of the driving chip U5 may be 6N137.
When the light emitting diode D1 is conducted, the other connection end of the light emitting diode D1 and the AND gate, namely the 7 th pin of the chip U5, is connected with the AND gate, then the AND gate generates high-voltage output, the triode Q4 is conducted, then the collector of the triode Q4 generates a high-voltage signal, and the triode Q3 is conducted, so that the triode Q3 can provide a large-voltage signal for the switching circuit, and the circuit structure is simple.
In this embodiment, the main control chip U6 is a common control chip, the chip model of the main control chip U6 is CDCLVD1208RHDT, and the main control chip U6 is configured to send a control signal when a zero crossing point is detected and a circuit is abnormal, which is not described in detail in the prior art, and the switch circuit is a circuit for controlling the zero line and the live line to supply power to the load, and may be controlled by a relay to supply power, or may be controlled by other modes to supply power, where the switch circuit is not described in detail in the prior art. .
The signal power supply circuit 3 comprises a triode Q1, a resistor R24, a resistor R7, a resistor R6 and a resistor R57, wherein a 3 rd pin of the triode Q1 is connected with a 2 nd pin of the driving chip U5 through the resistor R24; the 1 st pin of the triode Q1 is connected with a main control chip U6 through a resistor R57; the 2 nd pin of the triode Q1 is connected with a 3.3V power supply; the 2 nd pin of the triode Q1 is also connected with a 3.3V power supply through a resistor R7; the 3 rd pin of the triode Q1 is grounded through a resistor R6. The triode Q1 is conducted by detecting circuit abnormality in the main control chip U6 and sending a low-level signal when the circuit is in zero crossing, then the collector electrode of the triode Q1 outputs a high-level signal to conduct the driving chip, and the circuit structure is simple, so that the conduction can be realized.
The load power supply circuit package 1 comprises a resistor R3, a resistor R4 and a capacitor C5, wherein a 7 th pin of the driving chip U5 is connected with a 12V power supply through the resistor R3; the 8 th pin of the driving chip U5 is connected with a 12V power supply; one end of the capacitor C5 is connected with a 12V power supply, and the other end of the capacitor C5 is grounded; the 6 th pin of the driving chip U5 is connected with a 12V power supply through a resistor R4. The second power supply supplies power to the chip U5 through the 8 th pin on one hand, and the reference voltage of the chip U5 is formed after voltage division through the voltage R3 on the other hand, then the output voltage of the chip U5 is ensured to be too large or too small through the resistor R4, and the input second power supply is filtered through the capacitor C5.
The load driving circuit 2 comprises a triode Q3, a resistor R18 and a resistor R17, wherein the 1 st pin of the triode Q3 is connected with the 6 th pin of the driving chip U5, the 2 nd pin of the triode Q3 is grounded, and the 3 rd pin of the triode Q3 is connected with the load 5; the 3 rd pin of the triode Q3 is connected with a 12V power supply through a resistor R17; the 1 st pin of the triode Q3 is also grounded through a resistor R18. When the driving chip U5 outputs a high-level signal to enable the triode Q3 to be conducted, and then the high-level signal at the real position of the collector electrode of the triode Q3 supplies power for the switching circuit.
The working principle of the utility model is as follows: the driving signal is sent to the 1 st pin of the triode Q1 through the main control chip U6, so that the 2 nd pin and the 3 rd pin of the triode are conducted, a voltage signal is output to the 2 nd pin of the driving chip U5 through a 3.3V power supply, the 1 st pin of the triode Q3 can be sent out through the 6 th pin of the driving chip U5, the 2 nd pin and the 3 rd pin of the triode Q3 are conducted, and therefore the 12V power supply can output a voltage signal to a load to drive the load to work. The high voltage is thereby controlled to power the load by the control signal that is issued at a low voltage, thereby enabling the load to operate with the high voltage while preventing the higher voltage from potentially damaging the control elements.
Claims (6)
1. A signal driving circuit for arc extinction is characterized in that: the power supply circuit comprises a driving chip U5, a load power supply circuit, a load driving circuit and a signal power supply circuit, wherein a 2 nd pin of the driving chip U5 is connected with the signal power supply circuit; the 7 th pin and the 8 th pin of the driving chip U5 are connected with a load power supply circuit; the 1 st pin and the 4 th pin of the driving chip U5 are connected in an empty way; the 3 rd pin and the 5 th pin of the driving chip U5 are grounded; the 6 th pin of the driving chip U5 is connected with a load driving circuit, and the load power supply circuit is also connected with the 6 th pin of the driving chip U5; the signal power supply circuit is used for receiving a switching signal of the main control chip U6; the load driving circuit is externally connected with a switch circuit; the signal power supply circuit is externally connected with a first power supply, the load driving circuit and the load power supply circuit are externally connected with a second power supply, the first power supply is larger than the second power supply, and the driving chip U5 is used for enabling the output voltage of the chip to be high level and driving the load power supply circuit to be conducted and supplying power to the switch circuit when the signal power supply circuit supplies voltage to the chip.
2. The signal driving circuit for arc extinction according to claim 1, wherein: the signal power supply circuit comprises a triode Q1, a resistor R24, a resistor R7, a resistor R6 and a resistor R57, wherein a 3 rd pin of the triode Q1 is connected with a 2 nd pin of a driving chip U5 through the resistor R24; the 1 st pin of the triode Q1 is connected with a main control chip U6 through a resistor R57; the 2 nd pin of the triode Q1 is connected with a first power supply; the 2 nd pin of the triode Q1 is also connected with a first power supply through a resistor R7; the 3 rd pin of the triode Q1 is grounded through a resistor R6.
3. The signal driving circuit for arc extinction according to claim 2, wherein: the load driving circuit comprises a triode Q3, a resistor R18 and a resistor R17, wherein the 1 st pin of the triode Q3 is connected with the 6 th pin of the driving chip U5, and the 2 nd pin of the triode Q3 is grounded; the 3 rd pin of the triode Q3 is connected with a 12V power supply through a resistor R17, and the 3 rd pin of the triode Q3 is connected with a load; the 1 st pin of the triode Q3 is also grounded through a resistor R18.
4. A signal driving circuit for arc extinction according to claim 3, wherein: the load power supply circuit comprises a resistor R3, a resistor R4 and a capacitor C5, and a 7 th pin of the driving chip U5 is connected with a 12V power supply through the resistor R3; the 8 th pin of the driving chip U5 is connected with a second power supply; one end of the capacitor C5 is connected with a 12V power supply, and the other end of the capacitor C5 is grounded; the 6 th pin of the driving chip U5 is connected with a second power supply through a resistor R4.
5. The signal driving circuit for arc extinction according to claim 4, wherein: the first power supply is 3.3V and the second power supply is 12V.
6. The signal driving circuit for arc extinction according to claim 1, wherein: the driving chip U5 further comprises a light emitting diode D1, an AND gate and a triode Q4, wherein the positive electrode of the light emitting diode D1 is connected with the 2 nd pin of the chip U5, the negative electrode of the light emitting diode D1 is connected with the 3 rd pin of the driving chip U5, the base electrode of the triode Q4 is connected with the 6 th pin of the driving chip U5, the emitting electrode of the triode Q4 is grounded, the base electrode of the triode Q4 is connected with the output end of the AND gate, and the AND gate is connected with the 7 th pin of the driving chip U5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321726466.0U CN220527679U (en) | 2023-07-04 | 2023-07-04 | Signal driving circuit for arc extinction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321726466.0U CN220527679U (en) | 2023-07-04 | 2023-07-04 | Signal driving circuit for arc extinction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220527679U true CN220527679U (en) | 2024-02-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321726466.0U Active CN220527679U (en) | 2023-07-04 | 2023-07-04 | Signal driving circuit for arc extinction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220527679U (en) |
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2023
- 2023-07-04 CN CN202321726466.0U patent/CN220527679U/en active Active
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