CN208174268U - A kind of input reverse-connection protection circuit for sterlin refrigerator drive control - Google Patents
A kind of input reverse-connection protection circuit for sterlin refrigerator drive control Download PDFInfo
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- CN208174268U CN208174268U CN201820372384.3U CN201820372384U CN208174268U CN 208174268 U CN208174268 U CN 208174268U CN 201820372384 U CN201820372384 U CN 201820372384U CN 208174268 U CN208174268 U CN 208174268U
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Abstract
The utility model relates to a kind of input reverse-connections for sterlin refrigerator drive control to protect circuit, including direct-flow voltage regulation source, drive control device and reverse connecting protection module.Reverse connecting protection module includes metal-oxide-semiconductor, resistance R1, resistance R2 and zener diode Z.The pole G of metal-oxide-semiconductor connects the input anode of drive control device through resistance R1, and the pole S is connected as the first ground terminal GND1 with the ground terminal of direct-flow voltage regulation source, and the pole D connects drive control device systematically as the second ground terminal GND2.The input anode of the positive termination drive control device of direct-flow voltage regulation source.The pole G of a termination metal-oxide-semiconductor of resistance R2, the pole S of another termination metal-oxide-semiconductor.The anode of zener diode Z connects the pole S of metal-oxide-semiconductor, and cathode connects the pole G of metal-oxide-semiconductor.The utility model greatly improves the protective value of sterlin refrigerator drive control device.
Description
Technical field
The utility model relates to sterlin refrigerator Drive Control Technique fields, and in particular to one kind is used for stirling refrigeration
The input reverse-connection of machine drive control protects circuit.
Background technique
The drive control device of sterlin refrigerator is DC-AC inverter, and input is directional, and input terminal reversal connection or interference are drawn
The drive control device input negative terminal voltage risen is higher than anode voltage, can damage component in circuit, cause drive control device can not
Inverse damage.Existing drive control device does not have reversal connection protection function, and drive control device is inputted positive and negative terminal since user neglects
Reversed, the event for causing drive control device to be damaged often occurs, and makes troubles to user, causes certain economic loss.Therefore, it is
Guarantee drive control device inputs positive and negative terminal misconnection, interferes without damage, it is necessary to design a kind of drive control device input reverse-connection and protect
Protection circuit.
Utility model content
The purpose of this utility model is to provide a kind of input reverse-connections for sterlin refrigerator drive control to protect electricity
Road, drive control device inputs caused by which efficiently solves because of sterlin refrigerator drive control device input reverse-connection or interference
The negative terminal voltage problem impaired higher than drive control device caused by anode voltage greatly improves sterlin refrigerator driving control
The protective value of device processed.
To achieve the above object, the utility model uses following technical scheme：
A kind of input reverse-connection protection circuit for sterlin refrigerator drive control, including direct-flow voltage regulation source and driving control
Device processed, it further includes reverse connecting protection module which, which protects circuit,.
Specifically, the reverse connecting protection module includes metal-oxide-semiconductor, resistance R1, resistance R2 and zener diode Z.The MOS
The pole G of pipe connects the input anode of drive control device, ground of the pole S as the first ground terminal GND1 and direct-flow voltage regulation source through resistance R1
End is connected, and the pole D connects drive control device systematically as the second ground terminal GND2；The positive termination of the direct-flow voltage regulation source drives control
The input anode of device processed；The pole G of a termination metal-oxide-semiconductor of the resistance R2, the pole S of another termination metal-oxide-semiconductor；The zener diode
The anode of Z connects the pole S of metal-oxide-semiconductor, and cathode connects the pole G of metal-oxide-semiconductor.
Further, the metal-oxide-semiconductor is N-channel MOS pipe.
From the above technical scheme, the utility model is switched using drive control device input anode level control metal-oxide-semiconductor,
To control drive control device circuit on-off, it is ensured that drive control device inputs forward voltage work, and input backward voltage does not work,
Damage of the reversed input voltage to drive control device is avoided, to be effectively protected drive control device.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model.
Wherein：
1, direct-flow voltage regulation source, 2, reverse connecting protection module, 3, drive control device.
Specific embodiment
The utility model is described further with reference to the accompanying drawing：
A kind of input reverse-connection protection circuit for sterlin refrigerator drive control as shown in Figure 1, including direct current are steady
Potential source 1 and drive control device 3, it further includes reverse connecting protection module 2 which, which protects circuit,.
Specifically, the reverse connecting protection module 2 includes metal-oxide-semiconductor, resistance R1, resistance R2 and zener diode Z.It is described steady
The effect for pressing diode Z is to stablize the end metal-oxide-semiconductor G voltage, plays the role of protecting the end metal-oxide-semiconductor G.The pole G of the metal-oxide-semiconductor is through resistance R1
The input anode of drive control device is connect, the pole S is connected as the first ground terminal GND1 with the ground terminal of direct-flow voltage regulation source 1, and the pole D is as
Two ground terminal GND2 connect drive control device 3 systematically.The input of the positive termination drive control device 3 of the direct-flow voltage regulation source 1 is just
End.The pole G of a termination metal-oxide-semiconductor of the resistance R2, the pole S of another termination metal-oxide-semiconductor.The anode of the zener diode Z meets MOS
The pole S of pipe, cathode connect the pole G of metal-oxide-semiconductor.
Further, the metal-oxide-semiconductor is N-channel MOS pipe.
The working principle of the utility model is：
The utility model is applied in sterlin refrigerator drive control device, and DC level inversion is to hand over by drive control device
Galvanic electricity is flat, drives and controls refrigeration machine work.Direct-flow voltage regulation source 1 sends DC level to reverse connecting protection module 2, if input is positive
Level, reverse connecting protection module 2 work, and GND1 is connected with GND2,3 electric current of drive control device forming circuit, and drive control device 3 is normal
Work；If low and high level wiring is opposite or interference causes incoming level polarity on the contrary, reverse connecting protection module 2 does not work, GND1 and
GND2 is disconnected, and 3 electric current of drive control device cannot be formed into a loop, and drive control device 3 does not work, and avoids drive control device by reversed
The infringement of input voltage, to protect drive control device 3.
Reverse connecting protection module 2 plays the role of reverse connecting protection in entire refrigeration machine power supply system.Direct-flow voltage regulation source 1 is for direct current
Level is to reverse connecting protection module 2, if inputting positive level, level is divided through resistance R1, R2, makes the end N-channel MOS pipe G voltage
VCC × R2 ÷ (R1+R2) adjusts R1, R2 resistance value, making the end G level 12V, (12V guarantees at N-channel MOS according to VCC occurrence
In saturation conduction state), G pole tension is higher than the pole S（0V）, metal-oxide-semiconductor is open-minded, the work of 2 circuit of reverse connecting protection module, GND1 and GND2
It connects, the ground terminal of direct-flow voltage regulation source（0 volt of current potential）It is systematically connected with drive control device, 3 electric current of drive control device forming circuit,
Drive control device 3 works normally.If low and high level wiring is opposite or interference causes incoming level polarity on the contrary, the end G level is negative,
G pole tension is lower than the pole S（0V）Reverse connecting protection module 2 does not work, i.e., metal-oxide-semiconductor G pole tension is lower than S pole tension, and GND1 and GND2 are disconnected
It opens, metal-oxide-semiconductor shutdown, the ground terminal of direct-flow voltage regulation source（0 volt of current potential）It is systematically disconnected with drive control device, drive control device electric current 3
It cannot be formed into a loop, drive control device 3 does not work.Drive control device 3 not will receive the damage of reversed input voltage, to protect
Drive control device 3.
In conclusion the utility model is protected for sterlin refrigerator drive control device input reverse-connection, efficiently solve
Because of sterlin refrigerator drive control device input reverse-connection or drive control device input negative terminal voltage caused by interfering is higher than anode electricity
The impaired problem of drive control device, greatly improves the protective value of sterlin refrigerator drive control device caused by pressure.
Embodiment described above is only that preferred embodiments of the present invention are described, not practical to this
Novel range is defined, and under the premise of not departing from the spirit of the design of the utility model, those of ordinary skill in the art are to this
The various changes and improvements that the technical solution of utility model is made should all fall into the protection that the utility model claims book determines
In range.
Claims (2)
1. a kind of input reverse-connection for sterlin refrigerator drive control protects circuit, including direct-flow voltage regulation source and drive control
Device, it is characterised in that：It further include reverse connecting protection module；The reverse connecting protection module includes metal-oxide-semiconductor, resistance R1, resistance R2 and steady
Press diode Z；
The pole G of the metal-oxide-semiconductor connects the input anode of drive control device through resistance R1, and the pole S is as the first ground terminal GND1 and direct current
The ground terminal of source of stable pressure is connected, and the pole D connects drive control device systematically as the second ground terminal GND2；The direct-flow voltage regulation source is just
Terminate the input anode of drive control device；The pole G of a termination metal-oxide-semiconductor of the resistance R2, the pole S of another termination metal-oxide-semiconductor；It is described
The anode of zener diode Z connects the pole S of metal-oxide-semiconductor, and cathode connects the pole G of metal-oxide-semiconductor.
2. a kind of input reverse-connection for sterlin refrigerator drive control according to claim 1 protects circuit, special
Sign is：The metal-oxide-semiconductor is N-channel MOS pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820372384.3U CN208174268U (en) | 2018-03-19 | 2018-03-19 | A kind of input reverse-connection protection circuit for sterlin refrigerator drive control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820372384.3U CN208174268U (en) | 2018-03-19 | 2018-03-19 | A kind of input reverse-connection protection circuit for sterlin refrigerator drive control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208174268U true CN208174268U (en) | 2018-11-30 |
Family
ID=64373513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820372384.3U Active CN208174268U (en) | 2018-03-19 | 2018-03-19 | A kind of input reverse-connection protection circuit for sterlin refrigerator drive control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208174268U (en) |
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2018
- 2018-03-19 CN CN201820372384.3U patent/CN208174268U/en active Active
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