CN205693556U - Electromagnetic compatibility protection circuit for sensor - Google Patents
Electromagnetic compatibility protection circuit for sensor Download PDFInfo
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- CN205693556U CN205693556U CN201620467919.6U CN201620467919U CN205693556U CN 205693556 U CN205693556 U CN 205693556U CN 201620467919 U CN201620467919 U CN 201620467919U CN 205693556 U CN205693556 U CN 205693556U
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Abstract
A kind of electromagnetic compatibility protection circuit for sensor that this utility model provides, aim to provide a kind of small volume, filtering property is good, not by power supply Conduction Interference, this utility model is achieved by following technical proposals: one-level linear voltage regulator (1) and two grades of linear voltage regulators (3) are connected between sensor circuit (5) and power supply (6), and with power supply (7) in parallel, one-level filter capacitor (2) and secondary filter electric capacity (4) are parallel to described one-level linear voltage regulator (1) and the input of two grades of linear voltage regulators (3) respectively, electric connection of power supply ground (7)；One-level linear voltage regulator is by after source voltage, the interference signal transmitted by a part of power supply from one-level filter capacitor is transmitted to power supply ground, afterwards by after two grades of linear voltage regulator dividing potential drops again, it is transmitted to the interference signal that a part of power supply transmits again from secondary filter electric capacity power supply ground, finally the pure running voltage eliminating interference signal is supplied to sensor circuit.
Description
Technical field
This utility model relates to a kind of micro electromagnetic compatibility protection circuit for sensor.
Background technology
Along with electronic product must pass through various electricity for the lifting of Electro Magnetic Compatibility degree of attention, Novel electronic product
Magnetic compatibility test.Being applicable to aircraft airborne environment, the sensor worked under airborne Secondary Direct Electrical Resources is it is generally required to lead to
Cross the conducted susceptibility tests such as CS114, CS115, need for this power supply is filtered.The sensor of prior art is for reaching filter
Ripple purpose the most all can use the airborne Secondary Direct Electrical Resources of electric power source pair of module to change and filter, but power module volume one
As bigger, it is impossible to be arranged on novel small size sensor.If not using power module, then in order to power supply is filtered
Ripple, typically can use the filter elements such as jumbo electric capacity, inductance, and the same volume of these elements is bigger, it is impossible to be arranged on novel
Small size sensor on.
The purpose of this utility model is further with what the electromagnetic compatibility filtering technique of sensor was carried out to existing use
Development and improvement.
Summary of the invention
The purpose of this utility model is the weak point existed for above-mentioned prior art, it is provided that a kind of small volume, filter
Ripple better performances, not by power supply Conduction Interference, it is possible to adapts to the filter circuit combination of the work requirements of novel small size sensor.
The purpose of this utility model can be reached by following measures.The one that this utility model provides is for sensor
Electromagnetic compatibility protection circuit, including one-level linear voltage regulator 1,2, two grades of linear voltage regulators 3 of one-level filter capacitor and two grades of filters
Ripple electric capacity 4, it is characterised in that: one-level linear voltage regulator 1 and two grades of linear voltage regulators 3 be connected on sensor circuit 5 and power supply 6 it
Between, and in parallel with power supply ground 7, one-level filter capacitor 2 and secondary filter electric capacity 4 are parallel to described one-level linear voltage regulator 1 respectively
With the input of two grades of linear voltage regulators 3, electric connection of power supply ground 7；One-level linear voltage regulator 1 is by after power supply 6 voltage, from one
The interference signal that a part of power supply 6 transmits is transmitted to power supply ground 7 by level filter capacitor 2, afterwards by two grades of linear voltage regulators 2 again
After secondary dividing potential drop, it is transmitted to the interference signal that a part of power supply 6 transmits again from secondary filter electric capacity 3 power supply ground 7, finally will
The pure running voltage eliminating interference signal is supplied to sensor circuit 5.
This utility model has the effect that compared to prior art.
This utility model uses two-stage or multistage linear voltage regulator to carry out power filter with the combination of capacitor, uses little
The connection in series-parallel filter circuit of volume, lower powered linear voltage regulator and low capacity filter capacitor composition replaces the power supply mould of large volume
Block, is provided without integrated type power module and further reduces the volume of sensor inside protection circuit, can be integrated in one not
More than 350mm2Circular printed wiring board on.Printed circuit board area and always occupy under conditions of volume significantly reduces realize
To the preferable filtering disturbing signal from power supply so that the sensor circuit of filter circuit rear end is substantially without by power supply
The impact of Conduction Interference.Two-stage or multistage linear voltage regulator is used to carry out power filter with the combination of capacitor.
This utility model volume is minimum, it is possible to effective filter out the AC influence signal transmitted from power supply, it is possible to help little
Volume sensor passes through EMC test and the test of actually used electromagnetic environment.It is applicable to work in 32V ~ 10V unidirectional current
The sensor of pressure.
Accompanying drawing explanation
Fig. 1 is this utility model schematic diagram for the electromagnetic compatibility protection circuit of sensor.
Fig. 2 is this utility model fundamental diagram at sensor internal.
In figure: 1. one-level linear voltage regulator, 2 one-level filter capacitors, 3 two grades of linear voltage regulators, 4 secondary filter electric capacity, 5.
Sensor circuit, 6 power supplys, 7 power supply ground.
Detailed description of the invention
Further illustrate this utility model below in conjunction with the accompanying drawings with embodiment, but the most therefore this utility model is limited in
Among described scope of embodiments.
Such as Fig. 1.The electromagnetic compatibility protection circuit of this utility model sensor use two-stage or multistage linear voltage regulator with
The combination of capacitor carries out power filter, can be integrated in one and be not more than 350mm2Circular printed wiring board on.Mainly by
One-level linear voltage regulator 1,2, two grades of linear voltage regulators 3 of one-level filter capacitor and secondary filter electric capacity 4 form, one-level linear voltage stabilization
Device 1 and two grades of linear voltage regulators 3 are connected between sensor circuit 5 and power supply 6, and in parallel with power supply ground 7, one-level filter capacitor
2 and secondary filter electric capacity 4 be parallel to described one-level linear voltage regulator 1 and the input of two grades of linear voltage regulators 3 respectively, electrical connection
Power supply ground 7.One-level linear voltage regulator 1 and two grades of linear voltage regulators 3 use two-stage or multistage linear voltage regulator and capacitor
Combination carries out power filter.One-level linear voltage regulator 1 is by after power supply 6 voltage, from one-level filter capacitor 2 by a part of power supply
The interference signal that 6 transmit is transmitted to power supply ground 7, afterwards by after two grades of linear voltage regulator 2 dividing potential drops again, from secondary filter electric capacity
The interference signal that a part of power supply 6 transmits is transmitted to power supply ground 7, finally to eliminate the pure work of interference signal by 3 again
It is supplied to sensor circuit 5 as voltage.Wherein, one-level linear voltage regulator 1 and two grades of linear voltage regulators 3 for being arranged in series, one-level
The voltage output end of linear voltage regulator 1 is the voltage input end of two grades of linear voltage regulators 3.One-level filter capacitor 2 is arranged on one-level
Between voltage output end and the power supply ground of linear voltage regulator 1, secondary filter electric capacity 4 is arranged on the voltage of two grades of linear voltage regulators 3
Between outfan and power supply ground.The model of one-level linear voltage regulator 1 can be LM117, LT3060MPTS8 or other can be by defeated
Go out voltage and be set to the linear voltage regulator about nominal input voltage half, when input service voltage is 32V ~ 18V, one-level line
The output voltage of property manostat 1 can be 15V ~ 10V.The model of two grades of linear voltage regulators 3 can be AD584,
LT3060MPTS8-5 or other linear voltage regulator exporting fixed voltage values or voltage reference, the output of two grades of linear voltage regulators 3
Voltage can be 10V ~ 5V.The capacitance of one-level filter capacitor 2 and secondary filter electric capacity 4 is 0.1 μ F.
Such as Fig. 2.From power supply 6 to one-level linear voltage regulator 1 input direct-current working power and interference signal.Interference signal energy
Amount is after by one-level linear voltage regulator 1, and a part is lost during voltage is changed, and a part is by one-level linear voltage regulator
The earth terminal of 1 guides power supply ground 7, and remainder spreads out of from the voltage output end of one-level linear voltage regulator 1.Through filtering for the first time
Interference signal energy carried out by one-level filter capacitor 2 second time filter after, incoming two grades of linear voltage regulators 3, with before
Process identical, a part for interference signal energy be lost in the voltage transformation process of two grades of linear voltage regulators 3, a part of by
The earth terminal of two grades of linear voltage regulators 1 guides power supply ground 7, and remainder spreads out of from the voltage output end of one-level linear voltage regulator 1.
Finally, interference signal energy is after being filtered for the last time by secondary filter electric capacity 2, and dump energy is the faintest,
Cannot interfere sensor circuit 5, therefore sensor remains able to remain normal in the case of by power supply disturbance
Service behaviour, has reached the purpose of electromagnetic compatibility protection.
Claims (10)
1. for the electromagnetic compatibility protection circuit of sensor, including one-level linear voltage regulator (1), one-level filter capacitor (2),
Two grades of linear voltage regulators (3) and secondary filter electric capacity (4), it is characterised in that: one-level linear voltage regulator (1) and two grades of linear voltage stabilizations
Device (3) is connected between sensor circuit (5) and power supply (6), and with power supply (7) in parallel, one-level filter capacitor (2) and two grades
Filter capacitor (4) is parallel to described one-level linear voltage regulator (1) and the input of two grades of linear voltage regulators (3) respectively, electrical connection
Power supply ground (7)；One-level linear voltage regulator (1) is by after power supply (6) voltage, from one-level filter capacitor (2) by a part of power supply
(6) the interference signal transmitted with being transmitted to power supply (7), afterwards by after two grades of linear voltage regulator (2) dividing potential drops again, from two grades of filters
The interference signal with being transmitted to power supply (7) that a part of power supply (6) is transmitted by ripple electric capacity (3) again, finally will eliminate interference
The pure running voltage of signal is supplied to sensor circuit (5).
Electromagnetic compatibility protection circuit for sensor the most according to claim 1, it is characterised in that one-level linear voltage stabilization
Device (1) and two grades of linear voltage regulators (3) for being arranged in series, the voltage output end of one-level linear voltage regulator (1) be two grades linear steady
The voltage input end of depressor (3).
Electromagnetic compatibility protection circuit for sensor the most according to claim 2, it is characterised in that one-level linear voltage stabilization
Device (1) and two grades of linear voltage regulators (3) use two-stage or multistage linear voltage regulator to carry out power filter with the combination of capacitor.
Electromagnetic compatibility protection circuit for sensor the most according to claim 1, it is characterised in that one-level filter capacitor
(2) being arranged between voltage output end and the power supply ground of one-level linear voltage regulator (1), secondary filter electric capacity (4) is arranged on two grades
Between voltage output end and the power supply ground of linear voltage regulator (3).
Electromagnetic compatibility protection circuit for sensor the most according to claim 1, it is characterised in that one-level linear voltage stabilization
The model of device (1) is LM117 or LT3060MPTS8.
Electromagnetic compatibility protection circuit for sensor the most according to claim 1, it is characterised in that one-level linear voltage stabilization
Device (1) is the linear voltage regulator that output voltage is set to about nominal input voltage half.
Electromagnetic compatibility protection circuit for sensor the most according to claim 1, it is characterised in that one-level filter capacitor
And the capacitance of secondary filter electric capacity (4) is 0.1 μ F (2).
Electromagnetic compatibility protection circuit for sensor the most according to claim 1, it is characterised in that two grades of linear voltage stabilizations
The model of device (3) is AD584 or LT3060MPTS8-5.
Electromagnetic compatibility protection circuit for sensor the most according to claim 1, it is characterised in that two grades of linear voltage stabilizations
Device (3) is the linear voltage regulator of output fixed voltage value, and the output voltage of two grades of linear voltage regulators (3) is 10V ~ 5V.
Electromagnetic compatibility protection circuit for sensor the most according to claim 1, it is characterised in that electromagnetic compatibility is protected
Protection circuit is integrated in one less than 350mm2Circular printed wiring board on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620467919.6U CN205693556U (en) | 2016-05-20 | 2016-05-20 | Electromagnetic compatibility protection circuit for sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620467919.6U CN205693556U (en) | 2016-05-20 | 2016-05-20 | Electromagnetic compatibility protection circuit for sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205693556U true CN205693556U (en) | 2016-11-16 |
Family
ID=57261926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620467919.6U Active CN205693556U (en) | 2016-05-20 | 2016-05-20 | Electromagnetic compatibility protection circuit for sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205693556U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237521A (en) * | 2018-11-28 | 2020-06-05 | 杭州三花研究院有限公司 | Electrically operated valve and air conditioning system |
| EP3839305A4 (en) * | 2018-11-28 | 2022-10-19 | Zhejiang Sanhua Intelligent Controls Co., Ltd. | Electric valve, heat management assembly and air conditioning system |
-
2016
- 2016-05-20 CN CN201620467919.6U patent/CN205693556U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237521A (en) * | 2018-11-28 | 2020-06-05 | 杭州三花研究院有限公司 | Electrically operated valve and air conditioning system |
| CN111237521B (en) * | 2018-11-28 | 2022-03-01 | 浙江三花智能控制股份有限公司 | Electrically operated valve and air conditioning system |
| EP3839305A4 (en) * | 2018-11-28 | 2022-10-19 | Zhejiang Sanhua Intelligent Controls Co., Ltd. | Electric valve, heat management assembly and air conditioning system |
| US11761557B2 (en) | 2018-11-28 | 2023-09-19 | Zhejiang Sanhua Intelligent Controls Co., Ltd | Electric valve, heat management assembly and air conditioning system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |