CN210927587U - Anti-impact high-power electronic switch circuit - Google Patents
Anti-impact high-power electronic switch circuit Download PDFInfo
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- CN210927587U CN210927587U CN201922405165.8U CN201922405165U CN210927587U CN 210927587 U CN210927587 U CN 210927587U CN 201922405165 U CN201922405165 U CN 201922405165U CN 210927587 U CN210927587 U CN 210927587U
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Abstract
The utility model provides an anti-impact high-power electronic switch circuit, which comprises a voltage stabilizing unit, wherein the front end of the voltage stabilizing unit is connected with a power input end, and the rear end of the voltage stabilizing unit is connected with an oscillation unit for stabilizing the voltage of an input power supply and providing a stable voltage; the switch unit comprises an electronic switch Q5, the front end of the electronic switch Q5 is connected with a power supply input end, and the rear end of the electronic switch Q5 is connected with a power supply output end; the oscillation unit comprises a pulse generator U2, the pulse generator U2 is connected with a voltage stabilizing unit and an electronic switch Q5, and the pulse generator U2 starts working oscillation after receiving the stable voltage provided by the voltage stabilizing unit, so that the electronic switch Q5 is switched on; the front end of the protection unit is connected with the power input end, and the rear end of the protection unit is grounded and used for protecting the circuit. The utility model can avoid the input of low voltage impact current at the input end of the circuit through the connection of the switch unit and the oscillation unit, and improve the stability and reliability of the electronic switch; through the detection unit, automatic detection and output overvoltage protection of the circuit are achieved.
Description
Technical Field
The utility model relates to an electronic switch technical field, concretely relates to high-power electronic switch circuit of protecting against shock.
Background
The high-power electronic switch is suitable for inputting low voltage, output high-power circuit, present electronic switch circuit generally adopts the contactor, its shortcoming is bulky, need use a large amount of contact contacts, can appear phenomena such as mechanical wear and electric arc burn when the contact switching, the contact life-span is short, its reliability is poor, and in the twinkling of an eye of input power, can form very big instantaneous impulse current, generally be more than 10 times normal operating current, often can lead to making the contactor close not to brake, burn out the contact of contactor even, above-mentioned reason all can cause the unable normal use of contactor electronic switch.
At present, chinese patent No. CN201708697U discloses a dc power switch device, which includes a slow start circuit and a boost circuit, wherein an input terminal of the slow start circuit is connected to a dc power supply, an output terminal of the slow start circuit is connected to an input terminal of the boost circuit, an output terminal of the boost circuit is connected to a load, when the dc power supply inputs a high level, after the slow start of the slow start circuit for T time, an input voltage of the boost circuit is slowly increased to a dc power supply voltage, and the boost circuit is completely connected to the circuit; the direct-current power supply switching device is only suitable for the conditions of inputting direct-current high-level voltage and outputting the direct-current high-level voltage, and cannot be realized when low voltage is required to be input and high-power current is output. In order to overcome the defects of the prior art, how to provide an anti-shock high-power electronic switch circuit has become a key technical problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides an anti-impact high-power electronic switch circuit.
In order to solve the technical problem, the utility model discloses a technical scheme is: an impact resistant high power electronic switching circuit comprising:
the voltage stabilizing unit is connected with a power supply input end at the front end and is connected with an oscillation unit at the rear end and used for stabilizing the voltage of an input power supply and providing a stable voltage for the oscillation unit;
the switch unit comprises an electronic switch Q5, the electronic switch Q5 is a MOSFET, the front end of the electronic switch Q5 is connected with a power supply input end, and the rear end of the electronic switch Q5 is connected with a power supply output end;
the oscillation unit comprises a pulse generator U2, the pulse generator U2 is connected with a voltage stabilizing unit and an electronic switch Q5, and the pulse generator U2 starts working oscillation after receiving the stable voltage provided by the voltage stabilizing unit, so that the electronic switch Q5 is switched on;
a pin 3 of the pulse generator U2 is connected with a gate of the electronic switch Q5, a resistor R19, a resistor R13, a diode D10, a capacitor C9 and a resistor R12 are sequentially connected in series between the pulse generator U2 and the electronic switch Q5, and after the pulse generator U2 starts working and oscillating, the capacitor C9 is charged through the resistor R12, so that the gate voltage of the electronic switch Q5 is gradually increased;
the detection unit comprises a comparator U1, the comparator U1 is connected with a power output end and used for detecting whether output voltage exceeds a specified value or not, a pin 6 of the comparator U1 is connected with a base electrode of a triode V1, the triode V1 is an NPN type triode, an emitter and a collector of the triode V1 are connected with a capacitor C11 and a voltage stabilizing diode D8 in series, the capacitor C11 is used for protecting a voltage stabilizing diode D8, when the detection unit detects that the power output value exceeds the specified value, the pin 6 of the comparator U1 is at a high level, and the triode V1 is conducted and closes an electronic switch Q5.
The protection unit, the power input end is connected to the front end of protection unit, the rear end ground of protection unit for the protection circuit, the protection unit includes the two-way transient diode of three series connection for absorb the peak voltage of power input end, the protection unit still includes piezo-resistor RT1, a termination of piezo-resistor RT1 has power input end, piezo-resistor RT 1's other end ground connection, piezo-resistor RT1 is used for absorbing peak voltage when surpassing suppression voltage.
When a low-voltage power supply is input, the bidirectional transient diode D1, the bidirectional transient diode D2 and the bidirectional transient diode D5 are conducted and absorb peak voltage of an input end when the voltage exceeds a suppression voltage, meanwhile, voltage is stabilized through the resistor R7 and the voltage stabilizing diode D6, stable voltage is provided for the comparator U1 and the pulse generator U2, the pulse generator U2 starts to work and oscillate, the capacitor C9 is charged through the resistor R12, the grid voltage of the electronic switch Q5 is gradually increased, namely the electronic switch Q5 is gradually conducted, and the voltage at two ends of the capacitor with the electrode capacitor C12 is gradually and slowly increased, so that the functions of preventing the impact of the input end and preventing the electronic switch are achieved.
When the output voltage exceeds a specified value, the pin 6 of the comparator U1 is at a high level, the triode V1 is conducted, and the electronic switch Q5 is turned off, so that the circuit is subjected to output overvoltage protection.
The utility model has the advantages and positive effects that:
(1) the utility model discloses a switch unit and oscillation unit's connection has realized avoiding the impulse current of circuit input low-voltage, improves electronic switch's stability and reliability.
(2) The utility model discloses a detecting element has realized automated inspection and output overvoltage protection to the circuit.
Drawings
Fig. 1 is a schematic circuit diagram of an anti-shock high-power electronic switch circuit according to the present invention;
fig. 2 is a schematic circuit diagram of an anti-shock high-power electronic switching circuit according to the present invention;
fig. 3 is a schematic circuit diagram of a voltage stabilizing unit of an anti-shock high-power electronic switch circuit according to the present invention;
fig. 4 is a schematic circuit diagram of a switch unit of an anti-shock high-power electronic switch circuit according to the present invention;
fig. 5 is a schematic circuit diagram of an oscillating unit of an anti-shock high-power electronic switching circuit according to the present invention;
fig. 6 is a schematic circuit diagram of a detection unit of an anti-shock high-power electronic switch circuit according to the present invention;
fig. 7 is a schematic circuit diagram of a protection unit of the protection circuit of the utility model.
Detailed Description
As shown in fig. 1 to 7, the utility model provides a high-power electronic switch circuit of protecting against shock, include:
the front end of the voltage stabilizing unit is connected with a power supply input end, and the rear end of the voltage stabilizing unit is connected with an oscillation unit for providing stable voltage for the oscillation unit;
the power supply input end is connected with one end of a switch unit, a protection unit and a resistor R7, the other end of the resistor R7 is connected with the negative electrode of a voltage stabilizing diode D6, one end of a capacitor C7 and an oscillation unit, the voltage stabilizing diode D6 is connected with the resistor R7 in series and used for stabilizing the voltage of an input power supply, the positive electrode of the voltage stabilizing diode D6 is connected with the other end of the capacitor C7, the negative electrode of a polar capacitor C12, one end of a resistor R14 and the ground, the other end of the resistor R14 is connected with one end of a resistor R31, and the other end of the resistor R31 is connected with the positive electrode of a polar capacitor C12 and a power supply output end and used for stabilizing;
the switch unit comprises an electronic switch Q5, the electronic switch Q5 is a MOSFET, the front end of the electronic switch Q5 is connected with a power supply input end, and the rear end of the electronic switch Q5 is connected with a power supply output end for realizing electronic switching;
the drain of the electronic switch Q5 is connected with a power supply input end, the source of the electronic switch Q5 is connected with the anode of a zener diode D7, the anode of a diode D9 and a power supply output end, the drain of the electronic switch Q5 is connected with one end of a resistor R19, the other end of the resistor R19 is connected with one end of a resistor R13, the other end of the resistor R13 is connected with the cathode of a zener diode D7, the cathode of a zener diode D8, one end of a capacitor C11, one end of a resistor R32 and one end of a diode D10, the other end of the diode D10 is connected with the cathode of a diode D9 and one end of a capacitor C9, the other end of the capacitor C9 is connected with one end of a resistor R12, the other end of the resistor R12 is connected with an oscillation unit, and after the oscillation unit starts to work, the capacitor C9 is charged through the resistor R12, so that;
the oscillation unit comprises a pulse generator U2, the pulse generator U2 is connected with a voltage stabilizing unit and an electronic switch Q5, and the pulse generator U2 starts working oscillation after receiving the stable voltage provided by the voltage stabilizing unit, so that the electronic switch Q5 is switched on;
pin 1 of the pulse generator U2 is connected with the negative electrode of a pole capacitor C2, the emitter of a triode V1, one end of a capacitor C6 and ground, the other end of the capacitor C6 is connected with a power input end, pin 2 of the pulse generator U2 is connected with pin 6 of a pulse generator U2, pin 3 of the pulse generator U2 is connected with the gate of an electronic switch Q5, a resistor R19, a resistor R13, a diode D10, a capacitor C9 and a resistor R12 are sequentially connected in series between a pulse generator U2 and an electronic switch Q5, pin 5 of the pulse generator U12 is connected with one end of the capacitor C12, pin 6 of the pulse generator U12 is connected with one end of the capacitor C12, one end of the resistor R12 and one end of the resistor R12, pin 6 of the pulse generator U12 is connected with one end of the capacitor C12, one end of the resistor R12 and the other end of the resistor R12, and the other end of the resistor R12 of the pulse generator U12 are connected with pin 367 of the resistor U12, after the pulse generator U2 starts working and oscillating, the capacitor C9 is charged through the resistor R12, so that the electronic switch Q5 is gradually switched on;
a detection unit, which comprises a comparator U1, wherein the comparator U1 is connected with a power output end and is used for detecting whether the output voltage exceeds a specified value, a pin 1 of the comparator U1 is connected with one end of a resistor R4, one end of a resistor R14 and the ground, a pin 2 of the comparator U1 is connected with one end of a resistor R2 and one end of a capacitor C3, a pin 3 of the comparator U1 is connected with the other end of a resistor R14, a pin 4 of the comparator U1 is connected with the pin 8 of the pulse generator U2, a pin 5 of the comparator U1 is connected with the other end of a resistor R2 and one end of a resistor R3, a pin 6 of the comparator U1 is connected with one end of a resistor R11 and one end of a resistor R5, the other end of the resistor R11 is connected with a base of a triode V1, the triode V1 is an NPN-type triode, an emitter electrode of the triode V1 is connected with a capacitor C11 and a zener diode D8, the capacitor C11 is used for protecting a zener diode D8, the other end of the capacitor C3 is connected to the other end of the resistor R5, a pin 8 of the comparator U1 is connected to the other end of the resistor R4 and one end of the resistor R3, a pin 6 of the comparator U1 is connected to the detection unit, when the detection unit detects that the power output value exceeds a predetermined value, the pin 6 of the comparator U1 is at a high level, and the transistor V1 is turned on and turns off the electronic switch Q5;
the protection unit, the power input end is connected to the front end of protection unit, the rear end ground of protection unit for protection circuit, the protection unit includes the two-way transient state diode of three series connection for absorb the peak voltage of power input end, the protection unit still includes piezo-resistor RT1, a termination of piezo-resistor RT1 has power input end, piezo-resistor RT 1's other end ground connection for absorb peak voltage in the twinkling of an eye when surpassing suppression voltage.
The utility model discloses a theory of operation and working process as follows: when a low-voltage power supply is input, the bidirectional transient diode D1, the bidirectional transient diode D2 and the bidirectional transient diode D5 absorb peak voltage of an input end, voltage is stabilized through the resistor R7 and the voltage stabilizing diode D6, stable voltage is provided for the comparator U1 and the pulse generator U2, the pulse generator U2 starts working oscillation, the capacitor C9 is charged through the resistor R12, the grid voltage of the electronic switch Q5 is gradually increased, namely the electronic switch Q5 is gradually conducted, voltage at two ends of the capacitor with the pole capacitor C12 is gradually and slowly increased, and the electronic switch is achieved while impact of the input end is prevented.
The utility model is characterized in that: the utility model avoids the input of low voltage impact current at the input end of the circuit and improves the stability and reliability of the electronic switch by connecting the switch unit and the oscillation unit; through the detection unit, automatic detection and output overvoltage protection of the circuit are achieved.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent.
Claims (9)
1. An anti-impact high-power electronic switch circuit is characterized by comprising a voltage stabilizing unit, wherein the front end of the voltage stabilizing unit is connected with a power supply input end, and the rear end of the voltage stabilizing unit is connected with an oscillation unit for stabilizing the voltage of an input power supply and providing a stable voltage for the oscillation unit;
the switch unit comprises an electronic switch Q5, the front end of the electronic switch Q5 is connected with a power supply input end, and the rear end of the electronic switch Q5 is connected with a power supply output end;
the oscillation unit comprises a pulse generator U2, the pulse generator U2 is connected with a voltage stabilizing unit and an electronic switch Q5, and the pulse generator U2 starts working oscillation after receiving the stable voltage provided by the voltage stabilizing unit, so that the electronic switch Q5 is switched on;
the protection unit, the front end of protection unit connects the power input end, the rear end ground of protection unit is used for the protection circuit.
2. An impact-resistant high-power electronic switch circuit according to claim 1, wherein said protection unit comprises three series-connected bidirectional transient diodes for absorbing the peak voltage at the input terminal of the power supply.
3. An anti-shock high-power electronic switch circuit as claimed in claim 1, wherein pin 3 of the pulse generator U2 is connected to the gate of the electronic switch Q5, a resistor R19, a resistor R13, a diode D10, a capacitor C9 and a resistor R12 are connected in series between the pulse generator U2 and the electronic switch Q5 in sequence, and after the pulse generator U2 starts to work and oscillate, the capacitor C9 is charged through the resistor R12, so that the gate voltage of the electronic switch Q5 gradually increases.
4. The anti-shock high-power electronic switch circuit according to claim 1, further comprising a detection unit, wherein the detection unit comprises a comparator U1, and the comparator U1 is connected to the power output terminal for detecting whether the output voltage exceeds a predetermined value.
5. The circuit according to claim 4, wherein pin 6 of the comparator U1 is connected to the base of a transistor V1, and when the detection unit detects that the power output exceeds a predetermined value, pin 6 of the comparator U1 is high, and the transistor V1 turns on and turns off the electronic switch Q5.
6. An impact-proof high-power electronic switch circuit according to claim 1, wherein said protection unit further comprises a voltage dependent resistor RT1, one end of said voltage dependent resistor RT1 is connected with a power input terminal, and the other end of said voltage dependent resistor RT1 is connected with ground for preventing input terminal surge.
7. An anti-shock high-power electronic switch circuit according to claim 5, wherein the emitter and the collector of the transistor V1 are connected in series with a capacitor C11 and a zener diode D8, and the capacitor C11 is used for protecting the zener diode D8.
8. An impact-resistant high-power electronic switch circuit according to claim 1, wherein said electronic switch Q5 is a MOSFET.
9. A shock-resistant high-power electronic switch circuit according to claim 5, wherein said transistor V1 is an NPN transistor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922405165.8U CN210927587U (en) | 2019-12-27 | 2019-12-27 | Anti-impact high-power electronic switch circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922405165.8U CN210927587U (en) | 2019-12-27 | 2019-12-27 | Anti-impact high-power electronic switch circuit |
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| CN210927587U true CN210927587U (en) | 2020-07-03 |
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| CN201922405165.8U Active CN210927587U (en) | 2019-12-27 | 2019-12-27 | Anti-impact high-power electronic switch circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110943730A (en) * | 2019-12-27 | 2020-03-31 | 海南星宇智控科技有限公司 | Anti-impact high-power electronic switch circuit and driving method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110943730A (en) * | 2019-12-27 | 2020-03-31 | 海南星宇智控科技有限公司 | Anti-impact high-power electronic switch circuit and driving method thereof |
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