CN207124451U - A kind of protection circuit of power supply overvoltage self-recovering type Hall encoder - Google Patents
A kind of protection circuit of power supply overvoltage self-recovering type Hall encoder Download PDFInfo
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- CN207124451U CN207124451U CN201720649001.8U CN201720649001U CN207124451U CN 207124451 U CN207124451 U CN 207124451U CN 201720649001 U CN201720649001 U CN 201720649001U CN 207124451 U CN207124451 U CN 207124451U
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Abstract
The utility model discloses a kind of protection circuit of power supply overvoltage self-recovering type Hall encoder; recover to insure F1 soon including commutation diode D1, commutation diode D2, voltage-regulator diode D3 and pptc; the positive pole of the commutation diode D1 is connected to the input of power supply, accesses electric capacity C4 in the input of power supply and is grounded；The negative pole of the commutation diode D1 connects commutation diode D2 positive pole, and commutation diode D2 negative pole meets pptc and recovers to insure F1 one end soon, and pptc recovers to insure a F1 another port in parallel for terminating to resistance R2, resistance R3, resistance R5 and resistance R6 soon.The protection circuit of this power supply overvoltage self-recovering type Hall encoder, encoder supply voltage are designed using 12V, it is allowed to maximum supply voltage 32V, ensure that encoder is not externally powered overtension and damaged；One 100mA of connection pptc recovers to insure F1 soon, and limitation electric current is flowed through, and protection system element is not damaged by；After external voltage recovers normal, system still can normal work.
Description
Technical field
Sensor technical field is the utility model is related to, especially a kind of guarantor of power supply overvoltage self-recovering type Hall encoder
Protection circuit.
Background technology
Current domestic market and international market, photoelectric encoder be used for motor speed measuring, position detection and displacement and
Angle detecting, but in track transportation industry, due to its use environment and the high request of design service life, generally using Hall
Sensor.
In the design of early stage, the processing to power pack is excessively simple, causes in long-term use due to externally fed
Power good sex chromosome mosaicism, causes encoder to burn out, it is impossible to normal use.The design of current encoder device is only done in power supply power supply
Anti-reverse design and voltage stabilizing design, when power supply goes wrong, can burn out mu balanced circuit；Encoder is caused thoroughly to be unable to work
Make.
Utility model content
The purpose of this utility model is to provide a kind of protection circuit of power supply overvoltage self-recovering type Hall encoder, ensured
Encoder is not externally powered overtension and damaged, to solve the problems mentioned in the above background technology.
To achieve the above object, the utility model provides following technical scheme：
A kind of protection circuit of power supply overvoltage self-recovering type Hall encoder, including commutation diode D1, commutation diode
D2, voltage-regulator diode D3 and pptc recover to insure F1 soon, and the positive pole of the commutation diode D1 is connected to the input of power supply, in electricity
The input access electric capacity C4 in source is simultaneously grounded；The negative pole of the commutation diode D1 connects commutation diode D2 positive pole, rectification two
Pole pipe D2 negative pole meets pptc and recovers to insure F1 one end soon, and pptc recovers insurance the another of F1 and terminates to resistance R2, resistance soon
R3, resistance R5 and resistance R6 a port in parallel, resistance R2, resistance R3, resistance R5 and resistance R6 another port in parallel
It is connected to the positive pole of voltage-regulator diode D3 negative pole, electric capacity C2 positive pole and electric capacity C3；Voltage-regulator diode D3 plus earth, electricity
Hold C2 negative pole ground connection, electric capacity C3 negative pole ground connection.
As further program of the utility model：The resistance R2, resistance R3, resistance R5 and resistance R6 are power electricity
Resistance, and connected between power resistor using parallel way.
As further program of the utility model：The size of current that the pptc recovers to insure F1 soon is 100mA.
Compared with prior art, the utility model beneficial effect：
The protection circuit of this power supply overvoltage self-recovering type Hall encoder, encoder supply voltage are designed using 12V, it is allowed to
Maximum supply voltage 32V, ensure that encoder is not externally powered overtension and damaged；Electric power loop passes through commutation diode D1
Anti-reverse design is done with commutation diode D2, by power resistor R2, resistance R3, resistance R5 and resistance R6 and 22V voltage stabilizing
Diode D3 does voltage stabilizing, and maximum voltage is limited within 22V, and voltage protection is located in the range of maximum working voltage；Connection
One 100mA pptc recovers to insure F1 soon so that after external voltage raises, more than voltage-stabiliser tube voltage stabilizing value 22V, with electric current
Gradually increase, when reaching 100mA, pptc self- recoverages insurance resistance increase, limitation electric current flows through, and protects system element not damaged
It is bad；After external voltage recovers normal, system still can normal work.
Brief description of the drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
Referring to Fig. 1, in the utility model embodiment, a kind of protection electricity of power supply overvoltage self-recovering type Hall encoder
Road, including commutation diode D1, commutation diode D2, voltage-regulator diode D3 and pptc recover to insure F1, the pole of rectification two soon
Pipe D1 positive pole is connected to the input of power supply, accesses electric capacity C4 in the input of power supply and is grounded；Commutation diode D1 negative pole
Commutation diode D2 positive pole is connect, commutation diode D2 negative pole meets pptc and recovers to insure F1 one end soon, and pptc recovers to protect soon
A dangerous F1 another port in parallel for terminating to resistance R2, resistance R3, resistance R5 and resistance R6, resistance R2, resistance R3, resistance
Another of R5 and resistance R6 port in parallel are being connected to voltage-regulator diode D3 negative pole, electric capacity C2 positive pole and electric capacity C3 just
Pole；Voltage-regulator diode D3 plus earth, electric capacity C2 negative pole ground connection, electric capacity C3 negative pole ground connection；Resistance R2, resistance R3, electricity
It is power resistor to hinder R5 and resistance R6, and is connected between power resistor using parallel way.Pptc recovers to insure F1 electricity soon
Stream size is 100mA；Encoder supply voltage is designed using 12V, it is allowed to maximum supply voltage 32V.
Anti-reverse design is done by commutation diode D1 and commutation diode D2 in electric power loop, by resistance R2, resistance
R3, resistance R5 and resistance R6 and 22V voltage-regulator diode D3 do voltage stabilizing, and maximum voltage is limited within 22V；Voltage is protected
Shield is located in the range of maximum working voltage, and equipment running current scope is in 10-25mA, in commutation diode D2 and power
The pptc that a 100mA is accessed between resistance recovers to insure F1 soon；So that after external voltage raises, more than voltage-stabiliser tube voltage stabilizing value
22V, as electric current gradually increases, when reaching 100mA, pptc self- recoverages insurance resistance increase, limitation electric current flows through, and protects system
Element is not damaged by, and after external voltage recovers normal, system still can normal work.
It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of without departing substantially from spirit or essential attributes of the present utility model, it can realize that this practicality is new in other specific forms
Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new
The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained
All changes in justice and scope are included in the utility model.Any reference in claim should not be considered as limitation
Involved claim.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (3)
1. a kind of protection circuit of power supply overvoltage self-recovering type Hall encoder, including commutation diode D1, commutation diode D2,
Voltage-regulator diode D3 and pptc recover to insure F1 soon, it is characterised in that：The positive pole of the commutation diode D1 is connected to the defeated of power supply
Enter end, access electric capacity C4 in the input of power supply and be grounded；The negative pole of the commutation diode D1 is meeting commutation diode D2 just
Pole, commutation diode D2 negative pole meet pptc and recover to insure F1 one end soon, and pptc recovers insurance the another of F1 and terminates to electricity soon
Hinder R2, resistance R3, resistance R5 and resistance R6 a port in parallel, resistance R2, resistance R3, resistance R5 and resistance R6 another
Port in parallel is connected to the positive pole of voltage-regulator diode D3 negative pole, electric capacity C2 positive pole and electric capacity C3；Voltage-regulator diode D3 is just
Pole is grounded, electric capacity C2 negative pole ground connection, electric capacity C3 negative pole ground connection.
A kind of 2. protection circuit of power supply overvoltage self-recovering type Hall encoder according to claim 1, it is characterised in that：
The resistance R2, resistance R3, resistance R5 and resistance R6 are power resistor, and are connected between power resistor using parallel way.
A kind of 3. protection circuit of power supply overvoltage self-recovering type Hall encoder according to claim 1, it is characterised in that：
The size of current that the pptc recovers to insure F1 soon is 100mA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720649001.8U CN207124451U (en) | 2017-06-06 | 2017-06-06 | A kind of protection circuit of power supply overvoltage self-recovering type Hall encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720649001.8U CN207124451U (en) | 2017-06-06 | 2017-06-06 | A kind of protection circuit of power supply overvoltage self-recovering type Hall encoder |
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| Publication Number | Publication Date |
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| CN207124451U true CN207124451U (en) | 2018-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720649001.8U Active CN207124451U (en) | 2017-06-06 | 2017-06-06 | A kind of protection circuit of power supply overvoltage self-recovering type Hall encoder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109412231A (en) * | 2018-11-07 | 2019-03-01 | 恒银金融科技股份有限公司 | Electronic password lock external complement power supply circuit |
-
2017
- 2017-06-06 CN CN201720649001.8U patent/CN207124451U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109412231A (en) * | 2018-11-07 | 2019-03-01 | 恒银金融科技股份有限公司 | Electronic password lock external complement power supply circuit |
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