CN108808626B - Electrostatic protection circuit for protecting stable operation of product valve - Google Patents
Electrostatic protection circuit for protecting stable operation of product valve Download PDFInfo
- Publication number
- CN108808626B CN108808626B CN201810688561.3A CN201810688561A CN108808626B CN 108808626 B CN108808626 B CN 108808626B CN 201810688561 A CN201810688561 A CN 201810688561A CN 108808626 B CN108808626 B CN 108808626B
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- valve
- pin
- electrostatic protection
- chip
- resistor
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- 230000004224 protection Effects 0.000 title claims abstract description 62
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 239000003990 capacitor Substances 0.000 claims description 33
- 238000004880 explosion Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000001960 triggered effect Effects 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
- H02H7/08—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 dynamo-electric motors
-
- 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
- H02H7/08—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 dynamo-electric motors
- H02H7/0822—Integrated protection, motor control centres
-
- 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
- H02H7/08—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 dynamo-electric motors
- H02H7/0833—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 dynamo-electric motors for electric motors with control arrangements
- H02H7/0838—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 dynamo-electric motors for electric motors with control arrangements with H-bridge circuit
Landscapes
- Indication Of The Valve Opening Or Closing Status (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The invention discloses an electrostatic protection circuit for protecting a product valve from working stably. The invention comprises a valve driving circuit, an in-place detection circuit and an electrostatic protection circuit. The valve driving circuit comprises driving chips U5, C16, C17, R18 and R19. The valve in-place detection circuit comprises C24 and R25. The valve electrostatic protection circuit comprises an electrostatic protection chip R34 and a triode D10. The system provides overcurrent protection, short-circuit protection, undervoltage protection and overheat protection, and has antistatic, anti-surge and anti-explosion functions for the motor. When the motor does not work, the motor system is isolated from the main system, interference is prevented, and various protections are very comprehensive. The invention ensures that the valve of the gas meter works and the valve can not be interfered by external environment, thus the valve works more stably and the service life of the valve is prolonged.
Description
Technical Field
The invention provides an electrostatic protection circuit for protecting a product valve from working stably. The invention comprises a valve driving circuit, a valve in-place detection circuit and a valve electrostatic protection circuit.
Background
The valve can work in the common film type gas meter products in the market, but the valve cannot be ensured not to be interfered by the external environment. Therefore, the membrane gas meter product is provided, the gas meter valve is ensured to work, the valve is also ensured to be free from external interference, the work is more stable, and the service life of the valve is prolonged.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an electrostatic protection circuit for protecting a valve of a product from working stably.
The invention comprises a valve driving circuit, an in-place detection circuit and an electrostatic protection circuit.
The valve driving circuit comprises a valve driving chip U5, capacitors C16 and C17 and resistors R18 and R19. The first pin of the valve driving chip U5 is connected with a power supply of valve driving and is also connected with one end of a capacitor C16, and the other end of the capacitor C16 is grounded; the second pin of the valve driving chip U5 is connected with one end of the capacitor C19, and is simultaneously connected with one end of the valve, and the third pin of the valve driving chip U5 is connected with the other end of the capacitor C19; the fourth pin of the valve driving chip U5 is connected with one end of a capacitor C17, one end of a resistor R18, one end of a resistor R19 and an AD detection port of the MCU, and the other end of the capacitor C17, the other end of the resistor R18 and the other end of the resistor R19 are grounded; the fifth pin of the valve driving chip U5 is connected with the IO port of the MCU, the sixth pin of the valve driving chip U5 is connected with the IO port of the MCU, the seventh pin of the valve driving chip U5 is connected with the IO port of the MCU, and the eighth pin of the valve driving chip U5 is connected with the IO port of the MCU. The valve driving chip U5 adopts a DRV8837DSGR chip.
The valve in-place detection circuit comprises a capacitor C24 and a resistor R25. One end of the capacitor C24 is connected with the IO port of the MCU and one end of the resistor R25; the other end of the capacitor C24 is connected with the collector electrode of the triode D10; the other end of the resistor R25 is connected with the IO port of the MCU, and is simultaneously connected with one end of the resistor R34, the other end of the resistor R34 is connected with the base electrode of the triode D10, and the emitter electrode of the triode D10 is grounded. The triode D10 is a 9013NPN triode.
The valve electrostatic protection circuit comprises an electrostatic protection chip U7, a triode D10 and a resistor R34. The electrostatic protection chip U7 is a UDT26A05L05UL chip. The first pin of the electrostatic protection chip U7 is connected with the third pin of the valve driving chip U5 and the second pin of the valve P5; a second pin of the electrostatic protection chip U7; the third pin of the electrostatic protection chip U7 is connected with one end of an in-place detection pin (fourth pin) of the valve P5; the fourth pin of the electrostatic protection chip U7 is suspended and is not applicable; the fifth pin of the electrostatic protection chip U7 is connected with a power supply, so that the U7 works; the sixth pin of the electrostatic protection chip U7 is connected with the second pin of the valve driving chip U5 and the first pin of the valve P5; one end of the resistor R34 is connected with the IO port of the MCU and one end of the resistor R25, the other end of the resistor R34 is connected with the base electrode of the triode D10, the emitter electrode of the triode D10 is grounded, and the collector stage of the triode D10 is connected with one end of the capacitor C24. The triode D10 is a 9013NPN triode.
The valve driving chip can adopt a DRV8837DSGR chip; the electrostatic protection chip U7 is a UDT26A05L05UL chip; the electrostatic protection triode D10 is a 9013NPN triode.
The invention has the following beneficial effects: the system provides overcurrent protection, short-circuit protection, undervoltage protection and overheat protection, and has antistatic, anti-surge and anti-explosion functions for the motor. When the motor does not work, the motor system is isolated from the main system, interference is prevented, and various protections are very comprehensive.
The invention ensures that the valve of the gas meter works and the valve can not be interfered by external environment, thus the valve works more stably and the service life of the valve is prolonged.
Drawings
FIG. 1 is a circuit diagram of a valve driving circuit according to the present invention;
FIG. 2 is a circuit diagram of the electrostatic protection circuit of the valve of the present invention;
FIG. 3 is a circuit diagram of the valve in-place detection circuit and the valve electrostatic protection circuit of the present invention;
Detailed Description
The invention provides an electrostatic protection circuit for protecting a product valve from working stably. The invention comprises a valve driving circuit, a valve in-place detection circuit and a valve electrostatic protection circuit.
Example 1: as shown in fig. 1, the valve driving circuit includes a valve driving chip U5, capacitors C16 and C17, and resistors R18 and R19. The first pin of the valve driving chip U5 is connected with a power supply of valve driving and is also connected with one end of a capacitor C16, and the other end of the capacitor C16 is grounded; the second pin of the valve driving chip U5 is connected with one end of the capacitor C19, and is simultaneously connected with one end of the valve, and the third pin of the valve driving chip U5 is connected with the other end of the capacitor C19; the fourth pin of the valve driving chip U5 is connected with one end of a capacitor C17, one end of a resistor R18, one end of a resistor R19 and an AD detection port of the MCU, and the other end of the capacitor C17, the other end of the resistor R18 and the other end of the resistor R19 are grounded; the fifth pin of the valve driving chip U5 is connected with the IO port of the MCU, the sixth pin of the valve driving chip U5 is connected with the IO port of the MCU, the seventh pin of the valve driving chip U5 is connected with the IO port of the MCU, and the eighth pin of the valve driving chip U5 is connected with the IO port of the MCU. The valve driving chip U5 adopts a DRV8837DSGR chip.
As shown in fig. 2 and 3, the valve in-place detection circuit comprises a capacitor C24 and a resistor R25. One end of the capacitor C24 is connected with the IO port of the MCU and one end of the resistor R25; the other end of the capacitor C24 is connected with the collector electrode of the triode D10; the other end of the resistor R25 is connected with the IO port of the MCU, and is simultaneously connected with one end of the resistor R34, the other end of the resistor R34 is connected with the base electrode of the triode D10, and the emitter electrode of the triode D10 is grounded. The triode D10 is a 9013NPN triode.
As shown in fig. 2 and 3, the valve electrostatic protection circuit includes an electrostatic protection chip U7, a transistor D10, a valve P5, and a resistor R34. The electrostatic protection chip U7 is a UDT26A05L05UL chip. The first pin of the electrostatic protection chip U7 is connected with the third pin of the valve driving chip U5 and the second pin of the valve P5; a second pin of the electrostatic protection chip U7; the third pin of the electrostatic protection chip U7 is connected with one end of an in-place detection pin (fourth pin) of the valve P5; the fourth pin of the electrostatic protection chip U7 is suspended and is not applicable; the fifth pin of the electrostatic protection chip U7 is connected with a power supply, so that the U7 works; the sixth pin of the electrostatic protection chip U7 is connected with the second pin of the valve driving chip U5 and the first pin of the valve P5; one end of the resistor R34 is connected with the IO port of the MCU and one end of the resistor R25, the other end of the resistor R34 is connected with the base electrode of the triode D10, the emitter electrode of the triode D10 is grounded, and the collector stage of the triode D10 is connected with one end of the capacitor C24. The triode D10 is a 9013NPN triode.
The working process and principle are as follows:
the DRV8837 device has an H-bridge driver and can drive a dc motor or a winding of a stepper motor, as well as other devices such as electromagnetic coils. The output driver functional module includes an N-channel power MOSFET configured as an H-bridge to drive the motor windings. A charge pump is built in to generate the required gate drive voltage. The DRV8837 chip also integrates perfect protection measures, including overcurrent protection, short-circuit protection, undervoltage protection, overheat protection and other functions. Each FET tube on the H-bridge has an analog current limiting circuit to limit its current to turn off the FET tube on the H-bridge once the current has been over-current on its circuit for more than a set time. After about 1ms, the H-bridge automatically resumes normal function. When an H-bridge is short-circuited to ground, short-circuited to power supply or short-circuited to output, the overcurrent protection function is acted. If the temperature exceeds about 150 c, all FET tubes on the H-bridge are turned off, once the temperature falls back to the safe range. And automatically recovering to the normal working state. At any moment, once the voltage of the VCC terminal drops to the under-voltage locking threshold voltage, all circuits of the driver are disabled, and the internal logic circuit is triggered to reset until the voltage of the VCC terminal rises to be above the under-voltage locking threshold voltage, and the driver circuit is restored to a normal working state. When m_ctrl1 is high and m_ctrl2 is low, the motor is transmitting. When m_ctrl1 is low and m_ctrl2 is high, the motor is back-fed. When m_ctrl1 is high, m_ctrl2 is high, the motor is braked. When m_ctrl1 is low and m_ctrl2 is low, the motor is coasting.
The 4-pin GND of the DRV8837 is connected with the ground in parallel through the R18 and the R19 and is connected to the AD pin of the singlechip, and when the motor is over-current or short-circuited, the system can judge and record through the rise of the voltage.
The transient suppression diode UDT26A05 diode can absorb surge current and voltage at a speed of microseconds when being subjected to high transient energy impact. The protection system circuit has the functions of static electricity prevention, surge prevention and explosion prevention.
M_detect1 is the on-position detection pin of the 4-wire valve, which is low when the motor is on. And is normally high. M_POW connects the singlechip, uses with M_DETECT1 cooperation, and when the action of motor at the ooff valve, the M_GND of motor meets with the ground of system, and the motor normal work this moment. When the motor opens the valve in place or closes the valve in place. The motor ground is disconnected from the system ground at this point. When the external motor does not act, the external motor is prevented from being interfered by the outside, and interference signals are prevented from channeling to the system ground, so that the system is unstable.
Claims (1)
1. An electrostatic protection circuit for protecting a valve of a product from stably working is characterized by comprising a valve driving circuit, an in-place detection circuit and an electrostatic protection circuit;
the valve driving circuit comprises a valve driving chip U5, capacitors C16 and C17 and resistors R18 and R19; the first pin of the valve driving chip U5 is connected with a power supply of valve driving and is also connected with one end of a capacitor C16, and the other end of the capacitor C16 is grounded; the second pin of the valve driving chip U5 is connected with one end of the capacitor C19 and simultaneously connected with one end of the valve P5, and the third pin of the valve driving chip U5 is connected with the other end of the capacitor C19; the fourth pin of the valve driving chip U5 is connected with one end of a capacitor C17, one end of a resistor R18, one end of a resistor R19 and an AD detection port of the MCU, and the other end of the capacitor C17, the other end of the resistor R18 and the other end of the resistor R19 are grounded; the fifth pin of the valve driving chip U5 is connected with the IO port of the MCU, the sixth pin of the valve driving chip U5 is connected with the IO port of the MCU, the seventh pin of the valve driving chip U5 is connected with the IO port of the MCU, and the eighth pin of the valve driving chip U5 is connected with the IO port of the MCU; the valve driving chip U5 adopts a DRV8837DSGR chip;
the valve in-place detection circuit comprises a capacitor C24 and a resistor R25; one end of the capacitor C24 is connected with the IO port of the MCU and one end of the resistor R25; the other end of the capacitor C24 is connected with the collector electrode of the triode D10; the other end of the resistor R25 is connected with the IO port of the MCU, and is simultaneously connected with one end of the resistor R34, the other end of the resistor R34 is connected with the base electrode of the triode D10, and the emitter electrode of the triode D10 is grounded; the triode D10 adopts a 9013NPN triode;
the valve electrostatic protection circuit comprises an electrostatic protection chip U7, a triode D10 and a resistor R34; the electrostatic protection chip U7 adopts a UDT26A05L05UL chip; the first pin of the electrostatic protection chip U7 is connected with the third pin of the valve driving chip U5 and the second pin of the valve P5; the second pin of the electrostatic protection chip U7 is grounded; the third pin of the electrostatic protection chip U7 is connected with the in-place detection pin of the valve P5, and the in-place detection pin is the fourth pin of the valve P5; the fourth pin of the electrostatic protection chip U7 is suspended and is not applicable; the fifth pin of the electrostatic protection chip U7 is connected with a power supply, so that the U7 works; the sixth pin of the electrostatic protection chip U7 is connected with the second pin of the valve driving chip U5 and the first pin of the valve P5; one end of the resistor R34 is connected with the IO port of the MCU and one end of the resistor R25, the other end of the resistor R34 is connected with the base electrode of the triode D10, the emitter electrode of the triode D10 is grounded, and the collector electrode of the triode D10 is connected with one end of the capacitor C24; the triode D10 adopts a 9013NPN triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810688561.3A CN108808626B (en) | 2018-06-28 | 2018-06-28 | Electrostatic protection circuit for protecting stable operation of product valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810688561.3A CN108808626B (en) | 2018-06-28 | 2018-06-28 | Electrostatic protection circuit for protecting stable operation of product valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108808626A CN108808626A (en) | 2018-11-13 |
| CN108808626B true CN108808626B (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810688561.3A Active CN108808626B (en) | 2018-06-28 | 2018-06-28 | Electrostatic protection circuit for protecting stable operation of product valve |
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| CN (1) | CN108808626B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110687837A (en) * | 2019-08-30 | 2020-01-14 | 浙江威星智能仪表股份有限公司 | Power failure detection circuit based on single chip microcomputer |
| CN110995369B (en) * | 2019-12-27 | 2021-09-14 | 重庆合众慧燃科技股份有限公司 | Automatic detection device of wireless transmission control unit |
| CN110995370B (en) * | 2019-12-27 | 2021-10-01 | 重庆合众慧燃科技股份有限公司 | Detection method of wireless transmission control unit |
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|---|---|---|---|---|
| CN1830091A (en) * | 2002-03-04 | 2006-09-06 | 国际整流器公司 | H-bridge with single lead frame |
| EP2020572A1 (en) * | 2007-07-31 | 2009-02-04 | Sit la Precisa S.p.a. | Automatic device for the ignition and control of a gas apparatus and relative driving method |
| CN105042163A (en) * | 2015-08-24 | 2015-11-11 | 泉州市合创鞋业有限公司 | Control circuit and method for pulse electromagnetic valve of induction sanitary tool |
| CN206093118U (en) * | 2016-07-28 | 2017-04-12 | 湖南威铭能源科技有限公司 | A valve driving circuit for metering device |
-
2018
- 2018-06-28 CN CN201810688561.3A patent/CN108808626B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1830091A (en) * | 2002-03-04 | 2006-09-06 | 国际整流器公司 | H-bridge with single lead frame |
| EP2020572A1 (en) * | 2007-07-31 | 2009-02-04 | Sit la Precisa S.p.a. | Automatic device for the ignition and control of a gas apparatus and relative driving method |
| CN105042163A (en) * | 2015-08-24 | 2015-11-11 | 泉州市合创鞋业有限公司 | Control circuit and method for pulse electromagnetic valve of induction sanitary tool |
| CN206093118U (en) * | 2016-07-28 | 2017-04-12 | 湖南威铭能源科技有限公司 | A valve driving circuit for metering device |
Non-Patent Citations (2)
| Title |
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| DRV8837电机驱动芯片及其应用;张 彪等;《职业教育》;20230430;第78-79、83页 * |
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