CN217063688U - anti-EMC interference high-voltage electronic switch circuit - Google Patents
anti-EMC interference high-voltage electronic switch circuit Download PDFInfo
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- CN217063688U CN217063688U CN202220639622.9U CN202220639622U CN217063688U CN 217063688 U CN217063688 U CN 217063688U CN 202220639622 U CN202220639622 U CN 202220639622U CN 217063688 U CN217063688 U CN 217063688U
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Abstract
The utility model discloses an anti EMC interference 'S high-voltage electronic switch circuit, including resistance R1, zener diode D1, MOS pipe Q1, switch S1 and resistance R3, the first end of resistance R1, zener diode D1' S negative pole and Q1 'S source electrode connect the main power input positive terminal jointly, the positive pole of D1 and Q1' S grid are connected to resistance R1 'S second end, the first end of load is connected to Q1' S drain electrode; the second end of the resistor R1 is further connected to the first end of the resistor R2, the first end of the switch S1 is connected to the positive control power supply terminal, the second end of the switch S1 is connected to the first end of the resistor R3, the second end of the resistor R3 is connected to the base of the transistor Q2, the collector of the transistor Q2 is connected to the second end of the resistor R2, and the emitter of the transistor Q2 and the second end of the load are connected together to the negative control power supply terminal and the negative main power input terminal. The utility model discloses the arc phenomenon of drawing of having avoided metal switch to produce in the break-make realizes the on-off control to high tension circuit.
Description
Technical Field
The utility model relates to an electronic switch circuit technical field, specific anti EMC interference's high-voltage electronic switch circuit that says so.
Background
According to GJB151B-2013 electromagnetic emission and sensitivity requirements and measurements of military equipment and subsystems, when the equipment is used for conducting emission tests of power line spike signals (time domain), the switching transient conducted emission generated by the power line following manual or automatic switching operation should not exceed the following values: a) plus or minus 50% of rated voltage effective value (AC power line); b) and + 50% and-150% of rated voltage (direct current power line). The magnitude of the spike is referenced to the voltage appearing at the mains voltage waveform at the instant of switching operation, and not to 0V on the vertical axis of the oscilloscope. The traditional switch is conducted in a metal reed overlapping mode, voltage arcing can be generated at the conducting instant metal contact, the peak voltage conduction value of the switch can exceed the requirement of an electromagnetic compatibility test method CE107, and finally the test is inaccurate. With the application of the solid-state relay, the problem is successfully solved. However, the voltage of the solid-state relays commonly available on the market is low (about DC12V-220V), and the high-voltage requirement cannot be met.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an anti EMC disturbs high-voltage electronic switch circuit for adopt solid state relay to solve the problem that peak signal can not satisfy the high-pressure demand among the solution prior art.
The utility model discloses a following technical scheme solves above-mentioned problem:
a high-voltage electronic switch circuit resisting EMC interference comprises a resistor R1, a voltage-stabilizing diode D1, a MOS transistor Q1, a switch S1 and a resistor R3, wherein a first end of the resistor R1, a negative electrode of the voltage-stabilizing diode D1 and a source electrode of the MOS transistor Q1 are connected with a positive end of a main power input in a common mode, a second end of the resistor R1 is connected with a positive electrode of a voltage-stabilizing diode D1 and a grid electrode of the MOS transistor Q1, and a drain electrode of the MOS transistor Q1 is connected with a first end of a load; the second end of the resistor R1 is further connected with the first end of the resistor R2, the first end of the switch S1 is connected with the control power supply positive terminal, the second end of the switch S1 is connected with the first end of the resistor R3, the second end of the resistor R3 is connected with the base of the triode Q2, the collector of the triode Q2 is connected with the second end of the resistor R2, and the emitter of the triode Q2 and the second end of the load are connected with the control power supply negative terminal and the main power input negative terminal in a common mode.
The working principle is as follows:
when the switch S1 for controlling the power supply input is turned off, the transistor Q2 is not turned on, and the resistor R1, the resistor R2 and the negative terminal of the main power input do not form a loop, so that there is no voltage difference between the two terminals of the resistor R1, and the MOS transistor Q1 is not turned on. When the switch S1 is closed, the transistor Q2 is turned on, the resistor R1 and the resistor R2 form a loop with the negative input terminal of the main power, and a voltage difference is established between two ends of the resistor R1, so that the MOS transistor Q1 is turned on, and the back-end load forms a loop.
Meanwhile, the D1 voltage stabilizing diode can better protect a Q1 device and prevent the Q1 from being damaged due to overvoltage. The R3 current-limiting resistor can ensure that the LED and the Q2 device are in a safe working range.
Preferably, the second terminal of the resistor R3 is connected to the anode of the LED1, and the cathode of the LED1 is connected to the base of the transistor Q2. When the transistor Q2 is turned on, the LED1 is lit to indicate the operating status of the circuit.
A high-voltage electronic switch circuit resisting EMC interference comprises a resistor R1, a voltage-stabilizing diode D1, a MOS transistor Q1, a switch S1 and a resistor R3, wherein a first end of the resistor R1, a negative electrode of the voltage-stabilizing diode D1 and a source electrode of the MOS transistor Q1 are connected with a positive end of a main power input in a common mode, a second end of the resistor R1 is connected with a positive electrode of a voltage-stabilizing diode D1 and a grid electrode of the MOS transistor Q1, and a drain electrode of the MOS transistor Q1 is connected with a first end of a load; the second end of the resistor R1 is further connected with the first end of the resistor R2, the first end of the switch S1 is connected with the positive control power supply end, the second end of the switch S1 is connected with the first end of the resistor R3, the second end of the resistor R3 is connected with the gate of the MOS transistor Q2 ', the drain of the MOS transistor Q2' is connected with the second end of the resistor R2, the source of the MOS transistor Q2 'and the second end of the load are connected with the negative control power supply end and the negative main power input end in common, and a voltage stabilizing diode D2 is connected between the source and the gate of the MOS transistor Q2' in parallel.
The working principle is as follows:
when the switch S1 is turned off, there is no voltage difference across the resistor R4, the LED2 is not lit, and the MOS transistor Q2' is not turned on. The resistor R1, the resistor R2 and the negative end of the main power input do not form a loop, so that no voltage difference exists between the two ends of the resistor R1, and the MOS transistor Q1 is not conducted. When the switch S1 is closed, the MOS transistor Q2' is turned on, the resistor R1 and the resistor R2 form a loop with the negative end of the main power, a voltage difference is established across the resistor R1, the MOS transistor Q1 is turned on, and the back-end load forms a loop.
Preferably, the device further comprises a resistor R4 and a light emitting diode LED2, the resistor R4 and the light emitting diode LED2 are connected in series and then connected in parallel with the zener diode D2, a first end of the resistor R4 is connected to a second end of the resistor R3, a second end of the resistor R4 is connected to an anode of the light emitting diode LED2, and a cathode of the light emitting diode LED2 is connected to a source of the MOS transistor Q2'.
When the switch S1 is closed, the MOS transistor Q2' is turned on, and the LED2 is turned on to indicate the operating status.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
(1) the utility model selects the MOS tube as the switch device of the main power loop, and the switch realizes the on-off function of the circuit by the movement of the electric charge in the on-off process, thereby completely avoiding the arc discharge phenomenon generated by the metal switch in the on-off process; through the selection of the voltage resistance of the MOS device DS, the on-off control of a (0V-1500V) circuit can be realized.
(2) The utility model adds the voltage stabilizing diodes D1 and D2 in the circuit, which play a role of stabilizing the driving voltage of the devices Q1 and Q2 and prevent the damage of Q1 and Q2 caused by overvoltage; the working state of the circuit can be more intuitively shown by adding the light-emitting diode.
(3) The utility model has the characteristics of the circuit is simple, the principle is ripe, production technology is ripe.
Drawings
Fig. 1 is a schematic diagram of a first embodiment of the present invention;
fig. 2 is a schematic diagram of a second embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Example 1:
referring to fig. 1, the high-voltage electronic switch circuit capable of resisting EMC interference includes a resistor R1, a zener diode D1, a MOS transistor Q1, a switch S1, and a resistor R3, where a first end of the resistor R1, a negative electrode of the zener diode D1, and a source of the MOS transistor Q1 are commonly connected to a positive end of a main power input, a second end of the resistor R1 is connected to a positive electrode of the zener diode D1 and a gate of the MOS transistor Q1, and a drain of the MOS transistor Q1 is connected to a first end of a load; the second end of the resistor R1 is further connected with the first end of the resistor R2, the first end of the switch S1 is connected with the control power supply positive end, the second end of the switch S1 is connected with the first end of the resistor R3, the second end of the resistor R3 is connected with the base of the triode Q2, the collector of the triode Q2 is connected with the second end of the resistor R2, and the emitter of the triode Q2 and the second end of the load are connected with the control power supply negative end and the main power input negative end in common.
The working principle is as follows:
when the switch S1 for controlling the power supply input is turned off, the transistor Q2 is not turned on, the resistor R1 and the resistor R2 do not form a loop with the negative terminal of the main power input, so that there is no voltage difference between the two terminals of the resistor R1, and the MOS transistor Q1 is not turned on. When the switch S1 is closed, the transistor Q2 is turned on, the resistor R1 and the resistor R2 form a loop with the negative terminal of the main power input, a voltage difference is established between the two terminals of the resistor R1, the MOS transistor Q1 is turned on, and the load at the rear end forms a loop.
Meanwhile, the D1 voltage stabilizing diode can better protect a Q1 device and prevent the Q1 from being damaged due to overvoltage. The R3 current-limiting resistor can ensure that the LED and the Q2 device are in a safe working range.
Preferably, the second terminal of the resistor R3 is connected to the anode of the LED1, and the cathode of the LED1 is connected to the base of the transistor Q2. When the transistor Q2 is turned on, the LED1 is lit to indicate the operating status of the circuit.
Example 2:
with reference to fig. 2, the high-voltage electronic switch circuit for resisting EMC interference includes a resistor R1, a zener diode D1, a MOS transistor Q1, a switch S1, and a resistor R3, where a first end of the resistor R1, a negative electrode of the zener diode D1, and a source of the MOS transistor Q1 are connected to a positive end of a main power input, a second end of the resistor R1 is connected to a positive electrode of the zener diode D1 and a gate of the MOS transistor Q1, and a drain of the MOS transistor Q1 is connected to a first end of a load; the second end of the resistor R1 is further connected with the first end of the resistor R2, the first end of the switch S1 is connected with the control power supply positive terminal, the second end of the switch S1 is connected with the first end of the resistor R3, the second end of the resistor R3 is connected with the gate of the MOS transistor Q2 ', the drain of the MOS transistor Q2' is connected with the second end of the resistor R2, the source of the MOS transistor Q2 'and the second end of the load are connected with the control power supply negative terminal and the main power input negative terminal in common, and a voltage stabilizing diode D2 is connected between the source and the gate of the MOS transistor Q2' in parallel.
The working principle is as follows:
when the switch S1 is turned off, there is no voltage difference across the resistor R4, the LED2 is not lit, and the MOS transistor Q2' is not turned on. The resistor R1, the resistor R2 and the negative end of the main power input do not form a loop, so that no voltage difference exists between the two ends of the resistor R1, and the MOS transistor Q1 is not conducted. When the switch S1 is closed, the MOS transistor Q2' is turned on, the resistor R1 and the resistor R2 form a loop with the negative side of the main power, and a voltage difference is established across the resistor R1, so that the MOS transistor Q1 is turned on, and a back-end load forms a loop.
Preferably, the device further comprises a resistor R4 and a light emitting diode LED2, the resistor R4 and the light emitting diode LED2 are connected in series and then connected in parallel with the zener diode D2, a first end of the resistor R4 is connected to a second end of the resistor R3, a second end of the resistor R4 is connected to an anode of the light emitting diode LED2, and a cathode of the light emitting diode LED2 is connected to a source of the MOS transistor Q2'.
When the switch S1 is closed, the MOS transistor Q2' is turned on, and the LED2 is turned on to indicate the operating state.
By selecting the MOS tube as the switching device of the main power loop, the on-off function of the circuit is realized by the movement of electric charges in the on-off process of the switch, so that the arc discharge phenomenon generated by a metal switch in the on-off process is completely avoided, and the requirement of the switch on the CE107 in the EMC electromagnetic project in the on-off process is met.
Although the invention has been described herein with reference to the illustrated embodiments thereof, which are presently preferred, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and embodiments within the spirit and scope of the appended claims.
Claims (4)
1. The high-voltage electronic switch circuit is characterized by comprising a resistor R1, a voltage-stabilizing diode D1, a MOS transistor Q1, a switch S1 and a resistor R3, wherein a first end of the resistor R1, a negative electrode of the voltage-stabilizing diode D1 and a source electrode of the MOS transistor Q1 are connected with a positive end of a main power input together, a second end of the resistor R1 is connected with a positive electrode of a voltage-stabilizing diode D1 and a grid electrode of the MOS transistor Q1, and a drain electrode of the MOS transistor Q1 is connected with a first end of a load; the second end of the resistor R1 is further connected with the first end of the resistor R2, the first end of the switch S1 is connected with the control power supply positive terminal, the second end of the switch S1 is connected with the first end of the resistor R3, the second end of the resistor R3 is connected with the base of the triode Q2, the collector of the triode Q2 is connected with the second end of the resistor R2, and the emitter of the triode Q2 and the second end of the load are connected with the control power supply negative terminal and the main power input negative terminal in a common mode.
2. The EMC interference resistant high-voltage electronic switch circuit as claimed in claim 1, wherein said transistor Q2 is replaced by a MOS transistor Q2 ', a gate of a MOS transistor Q2 ' is connected to the second end of said resistor R3, a drain of a MOS transistor Q2 ' is connected to the second end of said resistor R2, a source of a MOS transistor Q2 ' is connected to the second end of said load, and a zener diode D2 is connected in parallel between the source and the gate of the MOS transistor Q2 '.
3. The high-voltage electronic switch circuit resisting EMC interference of claim 2, further comprising a resistor R4 and a light emitting diode LED2, wherein the resistor R4 and the light emitting diode LED2 are connected in series and then connected in parallel with the zener diode D2, a first end of a resistor R4 is connected to a second end of the resistor R3, a second end of the resistor R4 is connected to the anode of the light emitting diode LED2, and the cathode of the light emitting diode LED2 is connected to the source of the MOS transistor Q2'.
4. The EMC interference resistant high voltage electronic switch circuit of claim 1, wherein a second terminal of said resistor R3 is connected to an anode of a light emitting diode LED1, and a cathode of said light emitting diode LED1 is connected to a base of said transistor Q2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220639622.9U CN217063688U (en) | 2022-03-23 | 2022-03-23 | anti-EMC interference high-voltage electronic switch circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220639622.9U CN217063688U (en) | 2022-03-23 | 2022-03-23 | anti-EMC interference high-voltage electronic switch circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217063688U true CN217063688U (en) | 2022-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220639622.9U Active CN217063688U (en) | 2022-03-23 | 2022-03-23 | anti-EMC interference high-voltage electronic switch circuit |
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| Country | Link |
|---|---|
| CN (1) | CN217063688U (en) |
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- 2022-03-23 CN CN202220639622.9U patent/CN217063688U/en active Active
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