CN219247467U - Circuit control protector - Google Patents
Circuit control protector Download PDFInfo
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- CN219247467U CN219247467U CN202223570137.XU CN202223570137U CN219247467U CN 219247467 U CN219247467 U CN 219247467U CN 202223570137 U CN202223570137 U CN 202223570137U CN 219247467 U CN219247467 U CN 219247467U
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- resistor
- operational amplifier
- triode
- protection module
- circuit control
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Abstract
The utility model discloses a circuit control protector, which comprises a protection module, wherein the protection module comprises a first operational amplifier, a first relay, a first output end, a first input end, a first capacitor, a first resistor, a second resistor, a third potentiometer, a fourth resistor, a first NMOS tube and a second triode, one end of the first resistor is connected with a power supply, the other end of the first resistor is connected with one end of the second resistor and the drain electrode of the first NMOS tube, the source electrode of the first NMOS tube is connected with the first output end, the other end of the second resistor is connected with one end of the third potentiometer, one end of a first relay coil and the ground end, the other end of the first relay coil is connected with the first input end, the other end of the third potentiometer is connected with one end of the fourth resistor, the other end of the fourth resistor is connected with one end of the first resistor, and the extraction end of the third potentiometer is connected with the same-phase end of the first operational amplifier.
Description
Technical Field
The utility model relates to the field of power electronics, in particular to a circuit control protector.
Background
Publication No.: CN218103097U discloses an IGBT driving protection circuit, which mainly boosts or reduces voltage through an IGBT turn-off frequency control circuit, and a pre-amplifying circuit at the gate end of the IGBT amplifies and outputs according to received signal amounts, and according to different models, the source or drain end of the IGBT is connected with a power supply of a power supply module, and the power supply module basically adopts a zener diode to protect the post-circuit from voltage variation, so when the signal receiving end of the gate amplifying circuit is unstable, an amplified signal will reach the gate of the IGBT and then be lower than the conduction threshold value from the conduction gate to the drain or the source, and the IGBT frequency cannot reach a normal boost setting value.
Disclosure of Invention
Aiming at the technical problems, the utility model aims to provide a circuit control protector which comprises a protection module, wherein the protection module comprises a first operational amplifier U1, a first relay K1, a first output end OUT1, a first input end IN1, a first capacitor C1, a first resistor R1, a second resistor R2, a third potentiometer R3, a fourth resistor R4, a first NMOS transistor D1 and a second triode D2, one end of the first resistor R1 is connected with a power supply, the other end of the first resistor R1 is connected with one end of the second resistor R2, the drain electrode of the first NMOS transistor D1 is connected, the source electrode of the first NMOS transistor D1 is connected with the first output end OUT1, the other end of the second resistor R2 is connected with one end of the third potentiometer R3, one end of the first relay K1 coil is connected with a grounding end, the other end of the first relay K1 is connected with the first input end IN1, the other end of the third potentiometer R3 is connected with one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected with one end of the first resistor R1, the other end of the first drain electrode of the first NMOS transistor D1 is connected with the first end of the first resistor D1, the drain electrode of the first NMOS transistor D1 is connected with the first end of the first output end of the first NMOS transistor D1, the first end of the first output end of the first NMOS transistor D1 is connected with the first output end of the first triode C1, the first normally-normally open end of the first normally-open transistor C1 is connected with the first drain electrode of the first output end of the first triode C1.
Further, the protection module further comprises a second operational amplifier U2 and a third triode D3, the in-phase end of the second operational amplifier U2 is connected with the inverting end of the first operational amplifier U1 and one end of the first capacitor C1, the inverting end of the second operational amplifier U2 is connected with the tap end of the third potentiometer R3, the output end of the second operational amplifier U2 is connected with the base electrode of the third triode D3, the collector electrode of the third triode D3 is connected with the emitter electrode of the second triode D2, and the emitter electrode of the third triode D3 is connected with the grounding end.
Further, the protection module further includes a fourth light emitting diode D4 and a fifth phototransistor D5, where an anode of the fourth light emitting diode D4 is connected to a source of the first NMOS transistor D1, a cathode of the fourth light emitting diode D4 is connected to a ground terminal, the fourth light emitting diode D4 is coupled to the fifth phototransistor D5, a collector of the fifth phototransistor D5 is connected to a power supply, and an emitter of the fifth phototransistor D5 is connected to the first output terminal OUT1.
Further, the protection module further comprises a fifth resistor R5, one end of the fifth resistor R5 is connected with the grid electrode of the first NMOS tube D1 and the other end of the normally open contact of the first relay K1, and the other end of the fifth resistor R5 is connected with the grounding end.
Further, the protection module further includes a sixth diode D6, an anode of the sixth diode D6 is connected to an inverting terminal of the second operational amplifier U2, one end of the first capacitor C1, and a cathode of the sixth diode D6 is connected to an non-inverting terminal of the second operational amplifier U2.
Further, the protection module further includes a sixth resistor R6, one end of the sixth resistor R6 is connected to the output end of the second operational amplifier U2 and the base of the third triode D3, and the other end of the sixth resistor R6 is connected to the ground terminal.
Furthermore, the protection module further comprises a seventh resistor R7, one end of the seventh resistor R7 is connected with the collector electrode of the third triode D3, and the other end of the seventh resistor R7 is connected with the emitter electrode of the second triode D2.
Further, the protection module further includes an eighth resistor R8, and two ends of the eighth resistor R8 are respectively connected in series between the power supply and the collector of the second triode D2.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required in the prior art and the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 and fig. 2 are schematic circuit diagrams of a protection module of a circuit control protector according to the present utility model.
Detailed Description
In order that the objects and advantages of the utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, it being understood that the following text is only intended to describe one or more specific embodiments of the utility model and is not intended to limit the scope of the utility model as defined in the appended claims.
Referring to the drawings, the utility model relates to a circuit control protector, which comprises a protection module, wherein the protection module comprises a first operational amplifier U1, a first relay K1, a first output end OUT1, a first input end IN1, a first capacitor C1, a first resistor R1, a second resistor R2, a third potentiometer R3, a fourth resistor R4, a first NMOS transistor D1 and a second triode D2, one end of the first resistor R1 is connected with a power supply, the other end of the first resistor R1 is connected with one end of the second resistor R2 and the drain electrode of the first NMOS transistor D1, the source electrode of the first NMOS transistor D1 is connected with the first output end OUT1, the other end of the second resistor R2 is connected with one end of the third potentiometer R3, one end of the first relay K1 coil and the ground terminal, the other end of the first relay K1 is connected with the first input end IN1, the other end of the third potentiometer R3 is connected with one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected with one end of the first resistor R1, the third potentiometer R3 is connected with the first end of the first triode D1, the first end of the first triode D1 is connected with the first end of the first triode D1, the first triode D1 is connected with the drain electrode of the first triode D1, the first end of the triode D1 is connected with the first end of the first triode D1, the first normally-open end of the triode D1 is connected with the first end of the first output end of the triode D1, the triode D1 and the normally-open end of the triode D1 is connected with the first end normally-open to the first end and the triode D1, the normally-open to the normally-open end.
The first input end IN1 and the first output end OUT1 are connected IN series between the starting signal and the driving execution circuit, namely the first input end IN1 is connected with the front end of the amplifying circuit, the first output end OUT1 is connected with the signal receiving end of the amplifying circuit, the starting signal is input through the first input end IN1, the driving circuit execution signal is fed back by the first output end OUT1, the voltage division of the first resistor R1 and the second resistor R2 provides a power supply signal for the drain electrode of the first NMOS tube D1, the voltage division of the third potentiometer R3 and the fourth resistor R4 provides a differential signal for the first operational amplifier U1, IN the initial state, the output end of the first operational amplifier U1 enables the second triode D2 to be conducted, the power supply signal reaches the inverting end of the first capacitor C1 and the first operational amplifier U1 through the collector and the emitter, the potential of the first operational amplifier U1 rises along with the potential of the first capacitor C1, the inverting end of the first operational amplifier U1 is larger than the potential of the same phase end of the first operational amplifier U1, when the I1N receives the starting signal, the coil of the first relay K1 is closed to enable the normally open contact of the first relay K1 to be closed, the potential from the grid electrode of the first NMOS tube D1 to the drain electrode of the first NMOS tube D1 is larger than the conducting positive pressure difference, the first NMOS tube D1 is conducted, the drain electrode signal of the first NMOS tube D1 reaches the first output end OUT1 through the source electrode of the first NMOS tube D1, the first output end OUT1 outputs the execution signal of the driving circuit, when the power supply voltage is changed, the first resistor R1 and the second resistor R2 are equal proportion voltage division, the third potentiometer R3 and the fourth resistor R4 are adjusting voltage division, so that the signal at the same phase end of the first operational amplifier U1 is larger than the signal potential of the drain electrode of the first NMOS tube D1, namely the potential at the end of the first capacitor C1 is always higher than the conducting potential from the source electrode of the first NMOS tube D1 to the drain electrode, and the power supply voltage is prevented from being changed, because the drain electrode potential of the first NMOS tube D1 is higher than the potential of the first capacitor C1, the first NMOS tube D1 is turned off repeatedly uncontrollably or the voltage cannot be controlled precisely when the driving circuit performs signal post-stage connection with the boost driving circuit.
Specifically, the protection module further includes a second operational amplifier U2 and a third triode D3, where the in-phase end of the second operational amplifier U2 is connected with the inverting end of the first operational amplifier U1 and one end of the first capacitor C1, the inverting end of the second operational amplifier U2 is connected with the tap end of the third potentiometer R3, the output end of the second operational amplifier U2 is connected with the base of the third triode D3, the collector of the third triode D3 is connected with the emitter of the second triode D2, and the emitter of the third triode D3 is connected with the ground:
the signal at the end of the first capacitor C1 also reaches the same-phase end of the second operational amplifier U2, the inverting end of the second operational amplifier U2 receives the signal at the tap end of the third potentiometer R3, when the output end of the first operational amplifier U1 is not output, the output end of the second operational amplifier U2 outputs the signal to enable the third triode D3 to be conducted, the potential of the first capacitor C1 flows back through a loop formed by the collector, the emitter and the grounding end of the third triode D3, when the potential of the end of the first capacitor C1 falls back to the level of the tap end of the third potentiometer R3, the third triode D3 is cut off, and the reverse feedback of the third potentiometer R3 or the direct damage of the first NMOS tube D1 caused by the overhigh voltage difference of the first NMOS tube D1 is prevented.
Specifically, the protection module further includes a fourth light emitting diode D4 and a fifth phototransistor D5, where an anode of the fourth light emitting diode D4 is connected to a source of the first NMOS transistor D1, a cathode of the fourth light emitting diode D4 is connected to a ground terminal, the fourth light emitting diode D4 is coupled to the fifth phototransistor D5, a collector of the fifth phototransistor D5 is connected to a power supply, and an emitter of the fifth phototransistor D5 is connected to the first output terminal OUT 1:
the fourth light emitting diode D4 and the fifth phototriode D5 are arranged to prevent leakage current of the source electrode of the first NMOS tube D1 from entering a later-stage circuit to cause interference, when the first NMOS tube D1 is conducted, a drain electrode signal of the first NMOS tube D1 enables the fourth light emitting diode D4 to be coupled with the fifth phototriode D5 through the source electrode of the first NMOS tube D1, the fifth phototriode D5 is conducted, and a power supply signal reaches the first output end OUT1 through the collector electrode and the emitter electrode of the fifth phototriode D5.
Specifically, the protection module further includes a fifth resistor R5, one end of the fifth resistor R5 is connected with the gate of the first NMOS tube D1 and the other end of the normally open contact of the first relay K1, and the other end of the fifth resistor R5 is connected with the ground terminal:
the fifth phototransistor D5 is set to discharge parasitic capacitance of the first NMOS transistor D1, so as to prevent parasitic oscillation of the first NMOS transistor D1 from damaging the element.
Specifically, the protection module further includes a sixth diode D6, an anode of the sixth diode D6 is connected to an inverting terminal of the second operational amplifier U2 and one end of the first capacitor C1, and a cathode of the sixth diode D6 is connected to an in-phase terminal of the second operational amplifier U2:
when the signal at the end of the first capacitor C1 passes through the non-inverting end of the second operational amplifier U2, the voltage drop is firstly carried out through the sixth diode D6, so that the potential at the non-inverting end of the second operational amplifier U2 is smaller than that at the non-inverting end of the first operational amplifier U1, and the first operational amplifier U1 and the second operational amplifier U2 are prevented from being output reciprocally due to the self-discharge rate of the first capacitor C1.
Specifically, the protection module further includes a sixth resistor R6, one end of the sixth resistor R6 is connected to the output end of the second operational amplifier U2 and the base of the third triode D3, and the other end of the sixth resistor R6 is connected to the ground end:
the sixth resistor R6 is set to pull up the base signal of the third transistor D3.
Specifically, the protection module further includes a seventh resistor R7, one end of the seventh resistor R7 is connected to the collector of the third triode D3, and the other end of the seventh resistor R7 is connected to the emitter of the second triode D2:
the seventh resistor R7 is arranged to reduce the sensitivity of the circuit, so that the first capacitor C1 is prevented from breaking down the first NMOS tube D1 suddenly when the first NMOS tube D1 is in a conducting state.
Specifically, the protection module further includes an eighth resistor R8, where two ends of the eighth resistor R8 are respectively connected in series between the power supply and the collector of the second triode D2:
an eighth resistor R8 is provided for limiting the current of the second transistor D2.
Claims (8)
1. The circuit control protector comprises a protection module and is characterized by comprising a first operational amplifier, a first relay, a first output end, a first input end, a first capacitor, a first resistor, a second resistor, a third potentiometer, a fourth resistor, a first NMOS tube and a second triode, wherein one end of the first resistor is connected with a power supply, the other end of the first resistor is connected with one end of the second resistor, the drain electrode of the first NMOS tube is connected with the first output end, the other end of the second resistor is connected with one end of the third potentiometer, one end of the first relay coil and the ground end are connected, the other end of the first relay coil is connected with the first input end, the other end of the third potentiometer is connected with one end of the fourth resistor, the other end of the fourth resistor is connected with one end of the first resistor, the pumping end of the third potentiometer is connected with the same phase end of the first operational amplifier, the output end of the first operational amplifier is connected with the base electrode of the second triode, the collector of the second triode is connected with the power supply, the emitter of the second triode is connected with one end of the first capacitor, the inverting end of the first operational amplifier, the first relay coil is connected with the other end of the first triode, and the first normally open end of the first relay is connected with the first gate contact.
2. The circuit control protector according to claim 1, wherein the protection module further comprises a second operational amplifier and a third triode, the second operational amplifier is connected with the first operational amplifier in-phase end and the first capacitor in-phase end, the second operational amplifier in-phase end is connected with the third potentiometer tap end, the second operational amplifier output end is connected with the third triode base, the third triode collector is connected with the second triode emitter, and the third triode emitter is connected with the ground.
3. The circuit control protector of claim 1, wherein the protection module further comprises a fourth light emitting diode, a fifth phototransistor, wherein an anode of the fourth light emitting diode is connected to a source of the first NMOS transistor, a cathode of the fourth light emitting diode is connected to a ground terminal, the fourth light emitting diode is packaged in a coupled manner with the fifth phototransistor, a collector of the fifth phototransistor is connected to a power supply, and an emitter of the fifth phototransistor is connected to the first output terminal.
4. The circuit control protector of claim 1, wherein the protection module further comprises a fifth resistor, one end of the fifth resistor is connected to the gate of the first NMOS transistor and the other end of the normally open contact of the first relay, and the other end of the fifth resistor is connected to the ground.
5. The circuit control protector of claim 2, wherein the protection module further comprises a sixth diode, the anode of the sixth diode is connected to the inverting terminal of the second operational amplifier, the first capacitor is connected to one end, and the cathode of the sixth diode is connected to the non-inverting terminal of the second operational amplifier.
6. The circuit control protector of claim 2, wherein the protection module further comprises a sixth resistor, one end of the sixth resistor is connected to the output end of the second operational amplifier, the base of the third triode, and the other end of the sixth resistor is connected to the ground.
7. The circuit control protector of claim 2, wherein the protection module further comprises a seventh resistor, one end of the seventh resistor is connected to the collector of the third transistor, and the other end of the seventh resistor is connected to the emitter of the second transistor.
8. The circuit control protector of claim 1, wherein the protection module further comprises an eighth resistor, the eighth resistor having two ends connected in series between a power source and a collector of the second transistor, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223570137.XU CN219247467U (en) | 2022-12-30 | 2022-12-30 | Circuit control protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223570137.XU CN219247467U (en) | 2022-12-30 | 2022-12-30 | Circuit control protector |
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| Publication Number | Publication Date |
|---|---|
| CN219247467U true CN219247467U (en) | 2023-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223570137.XU Active CN219247467U (en) | 2022-12-30 | 2022-12-30 | Circuit control protector |
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| CN (1) | CN219247467U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116799748A (en) * | 2023-08-28 | 2023-09-22 | 山西创芯光电科技有限公司 | Automatic protection circuit for night vision full-color illuminance of image intensifier |
| CN116827124A (en) * | 2023-07-05 | 2023-09-29 | 北京炎黄国芯科技有限公司 | DCDC loop compensation structure |
-
2022
- 2022-12-30 CN CN202223570137.XU patent/CN219247467U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116827124A (en) * | 2023-07-05 | 2023-09-29 | 北京炎黄国芯科技有限公司 | DCDC loop compensation structure |
| CN116827124B (en) * | 2023-07-05 | 2024-01-30 | 北京炎黄国芯科技有限公司 | DCDC loop compensation structure |
| CN116799748A (en) * | 2023-08-28 | 2023-09-22 | 山西创芯光电科技有限公司 | Automatic protection circuit for night vision full-color illuminance of image intensifier |
| CN116799748B (en) * | 2023-08-28 | 2023-11-14 | 山西创芯光电科技有限公司 | Automatic protection circuit for night vision full-color illuminance of image intensifier |
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