CN220933054U - Open-loop Hall current sensor power supply stabilizing circuit - Google Patents
Open-loop Hall current sensor power supply stabilizing circuit Download PDFInfo
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- CN220933054U CN220933054U CN202322532332.1U CN202322532332U CN220933054U CN 220933054 U CN220933054 U CN 220933054U CN 202322532332 U CN202322532332 U CN 202322532332U CN 220933054 U CN220933054 U CN 220933054U
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- 230000000087 stabilizing effect Effects 0.000 title claims abstract description 18
- 239000003990 capacitor Substances 0.000 claims description 32
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 2
- 230000005355 Hall effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model relates to the field of Hall current sensor electronic circuits, in particular to a power supply stabilizing circuit of an open-loop Hall current sensor, which comprises a positive voltage module and a negative voltage module; the positive voltage module comprises a positive reference voltage unit and a positive voltage power output unit, and the positive voltage power output unit is electrically connected with the positive reference voltage unit, the positive voltage input end and the positive voltage output end in sequence; the negative voltage module comprises a negative reference voltage unit and a negative voltage power output unit, and the negative voltage power output unit is electrically connected with the negative voltage reference unit, the negative voltage input end and the negative voltage output end in sequence; the scheme can provide stable and clean output voltage for the open-loop Hall current sensor under the condition that an input power supply is unstable or voltage fluctuation is large, greatly improves the current measurement precision of the open-loop Hall current sensor, has few used elements, simple structure and low cost, has wide application range, and expands the application field of the open-loop Hall current sensor.
Description
Technical Field
The utility model relates to the field of Hall current sensors, in particular to a power supply stabilizing circuit of an open-loop Hall current sensor.
Background
The Hall current sensor is a current detection device which is developed based on the Hall effect principle and used for carrying out isolation detection on primary side current, a magnetic field generated by the primary side current is collected by a magnetic focusing ring, a Hall element arranged in the magnetic focusing ring is used for collecting the magnetic field to generate a Hall voltage in equal proportion to the primary side magnetic field, and the isolation detection on the primary side current can be realized by measuring the magnitude of the Hall voltage. The Hall current sensor can measure the current of direct current, alternating current, pulse and various irregular waveforms, and converts the current into voltage signals, current signals or other information output in a required form which meets certain standard requirements according to certain rules so as to meet the requirements of information transmission, processing, storage, display, recording, control and the like.
At present, an electronic circuit of an open-loop Hall current sensor basically has no voltage stabilizing measure at a power end, or only a simple capacitor is used for filtering, and under the condition that input voltage fluctuates severely, sensor output can also be influenced, so that the accuracy of the sensor is caused.
Disclosure of utility model
In order to solve the problems, the utility model provides a power stabilizing circuit of an open-loop Hall current sensor, which comprises a positive voltage module and a negative voltage module; the positive voltage module comprises a positive reference voltage unit and a positive voltage power output unit, and the positive voltage power output unit is electrically connected with the positive reference voltage unit, the positive voltage input end and the positive voltage output end in sequence;
The negative voltage module comprises a negative reference voltage unit and a negative voltage power output unit, and the negative voltage power output unit is electrically connected with the negative voltage reference unit, the negative voltage input end and the negative voltage output end in sequence.
Preferably, the positive reference voltage unit comprises a reference voltage chip U1, positive voltage regulating resistors R1 and R2, a diode D3 and a current limiting resistor R5; the negative reference voltage unit comprises a reference voltage chip U2, positive voltage regulating resistors R3 and R4, a diode D4 and a current limiting resistor R6.
Preferably, the positive voltage power output unit comprises a power tube Q1, the power tube Q1 adopts a power triode BCX56, the negative voltage power output unit comprises a power tube Q2, and the power tube Q2 adopts a power triode BCX53.
Preferably, the positive electrode of the diode D3 is connected to the base electrode of the power tube Q1, the negative electrode of the diode D3 is connected to the input electrode of the positive reference voltage unit, and the PN junction temperature drift of the diode D3 can offset the PN junction temperature drift of the power tube Q1.
Preferably, the power supply further comprises a positive protection diode D1 and a negative protection diode D2, wherein the positive electrode of the positive protection diode D1 is connected with the positive voltage input end, the negative electrode of the positive protection diode D1 is connected with the input end of the positive power unit, the negative electrode of the negative protection diode D2 is connected with the negative voltage input end, and the positive electrode of the negative protection diode D2 is connected with the input end of the negative power unit.
Preferably, the filter further comprises positive filter capacitors C1 and C3 and negative filter capacitors C2 and C4, wherein one ends of the positive filter capacitors C1 and C3 are connected with a power input positive electrode, the other ends of the positive filter capacitors C1 and C3 are grounded, one ends of the negative filter capacitors C2 and C4 are connected with a power input negative electrode, and the other ends of the negative filter capacitors C2 and C4 are grounded.
Preferably, the filter further comprises an input positive filter capacitor C5 and an output negative filter capacitor C6, one end of the positive filter capacitor C5 is connected with the power output positive electrode, the other end of the positive filter capacitor C5 is connected with the power output negative electrode, and the other end of the negative filter capacitor C6 is grounded.
The beneficial effects are that the technical scheme of the application has the following technical effects:
The utility model provides a power stabilizing circuit of an open-loop Hall current sensor, which comprises a positive voltage module and a negative voltage module; the positive voltage module comprises a positive reference voltage unit and a positive voltage power output unit, and the positive voltage power output unit is electrically connected with the positive reference voltage unit, the positive voltage input end and the positive voltage output end in sequence; the negative voltage module comprises a negative reference voltage unit and a negative voltage power output unit, and the negative voltage power output unit is electrically connected with the negative voltage reference unit, the negative voltage input end and the negative voltage output end in sequence; the scheme can provide stable and clean output voltage for the open-loop Hall current sensor under the condition that an input power supply is unstable or voltage fluctuation is large, greatly improves the current measurement precision of the open-loop Hall current sensor, has few used elements, simple structure and low cost, has wide application range, and expands the application field of the open-loop Hall current sensor.
It is to be understood that all combinations of the foregoing concepts, as well as additional concepts described in more detail below, may be considered a part of the presently disclosed subject matter, provided that such concepts are not mutually inconsistent.
The foregoing and other aspects, embodiments, and features of the present teachings will be more fully understood from the following description taken in conjunction with the accompanying drawings. Other additional aspects of the utility model, such as features and advantages of the exemplary embodiments, will be apparent from the description that follows. Specific embodiments of the present utility model are given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. Embodiments of various aspects of the utility model will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a power stabilizing circuit of an open loop Hall current sensor of the present utility model;
Fig. 2 is a practical application circuit of the power stabilizing circuit of the open-loop hall current sensor of the present utility model.
Detailed Description
For a better understanding of the technical content of the present utility model, specific examples are set forth below, along with the accompanying drawings. Aspects of the utility model are described in this disclosure with reference to the drawings, in which are shown a number of illustrative embodiments. The embodiments of the present disclosure are not necessarily intended to include all aspects of the utility model. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, may be implemented in any of a number of ways, as the disclosed concepts and embodiments are not limited to any implementation. Additionally, some aspects of the disclosure may be used alone or in any suitable combination with other aspects of the disclosure.
As shown in fig. 1, an open loop hall current sensor power stabilizing circuit includes a positive voltage module and a negative voltage module; the positive voltage module comprises a positive reference voltage unit and a positive voltage power output unit, and the positive voltage power output unit is electrically connected with the positive reference voltage unit, the positive voltage input end and the positive voltage output end in sequence; the negative voltage module comprises a negative reference voltage unit and a negative voltage power output unit, and the negative voltage power output unit is electrically connected with the negative reference voltage unit, the negative voltage input end and the negative voltage output end in sequence; the scheme can provide stable and clean output voltage for the open-loop Hall current sensor under the condition that an input power supply is unstable or voltage fluctuation is large, greatly improves the current measurement precision of the open-loop Hall current sensor, has few used elements, simple structure and low cost, has wide application range, and expands the application field of the open-loop Hall current sensor.
Specifically, the positive reference voltage unit includes a reference voltage chip U1, positive voltage adjusting resistors R1 and R2, a diode D3, and a current limiting resistor R5, where the U1 chip uses TL431; the ratio of the R1 resistor and the R2 resistor can be conveniently adjusted to adjust the forward voltage output value, and the adjusting range is between +2.5V and +36V.
The negative reference voltage unit comprises a reference voltage chip U2, positive voltage regulating resistors R3 and R4, a diode D4 and a current limiting resistor R6, wherein the U2 chip adopts TL431; the negative voltage output value can be conveniently adjusted by adjusting the ratio of the R3 resistor to the R4 resistor, and the adjusting range is between-2.5V and-36V. The positive and negative output voltages can adjust different output voltages according to different application circuits.
The positive voltage power output unit Q1 adopts NPN type power triode BCX56, the base electrode of the Q1 power triode is connected with one end of the diode D3, the collector electrode is connected with the positive voltage input end, and the emitter electrode is connected with the positive voltage output end.
The negative voltage power output unit Q2 adopts a PNP type power transistor BCX 53. The base electrode of the Q2 power triode is connected with one end of a diode D4, the emitter electrode is connected with the negative voltage input end, and the collector electrode is connected with the negative voltage output end. According to the application circuits with different powers connected at the later stage, the power triode can select the triode with different powers.
The positive electrode of the diode D3 is connected with the base electrode of the power tube Q1, the negative electrode of the diode D3 is connected with the input electrode of the positive reference voltage unit, and the PN junction temperature drift of the diode D3 just counteracts the PN junction temperature drift of the power tube Q1, so that the whole positive voltage output is stable in the whole temperature range, and the negative voltage end circuit is consistent with the working principle and structure of the circuit and is not repeated here.
The circuit structure further comprises a positive protection diode D1 and a negative protection diode D2, wherein the positive electrode of the positive protection diode D1 is connected with the positive voltage input end, the negative electrode of the positive protection diode D1 is connected with the input electrode of the positive voltage power output unit, the negative electrode of the negative protection diode D2 is connected with the negative voltage input end, and the positive electrode of the negative protection diode D2 is connected with the input electrode of the negative voltage power output unit.
The circuit structure further comprises positive filter capacitors C1 and C3 and negative filter capacitors C2 and C4, one ends of the positive filter capacitors C1 and C3 are connected with a power input positive electrode, the other ends of the positive filter capacitors C1 and C3 are grounded, one ends of the negative filter capacitors C2 and C4 are connected with a power input negative electrode, and the other ends of the negative filter capacitors C2 and C4 are grounded.
The circuit structure further comprises an input positive filter capacitor C5 and an output negative filter capacitor C6, one end of the positive filter capacitor C5 is connected with the power output positive electrode, the other end of the positive filter capacitor C5 is connected with the power output negative electrode, and the other end of the negative filter capacitor C6 is connected with the ground.
One end of the positive voltage circuit is connected with the positive voltage, the other end of the positive voltage circuit is grounded, one end of the negative voltage circuit is connected with the negative voltage, and the other end of the negative voltage circuit is grounded. The positive voltage circuit is commonly grounded with the negative voltage circuit.
Fig. 2 is a practical application circuit of the power stabilizing circuit of the open-loop hall current sensor of the present utility model.
While the utility model has been described with reference to preferred embodiments, it is not intended to be limiting. Those skilled in the art will appreciate that various modifications and adaptations can be made without departing from the spirit and scope of the present utility model. Accordingly, the scope of the utility model is defined by the appended claims.
Claims (7)
1. The utility model provides an open-loop hall current sensor power stabilizing circuit which characterized in that: the device comprises a positive voltage module and a negative voltage module; the positive voltage module comprises a positive reference voltage unit and a positive voltage power output unit, and the positive voltage power output unit is electrically connected with the positive reference voltage unit, the positive voltage input end and the positive voltage output end in sequence;
The negative voltage module comprises a negative reference voltage unit and a negative voltage power output unit, and the negative voltage power output unit is electrically connected with the negative voltage reference unit, the negative voltage input end and the negative voltage output end in sequence.
2. The open loop hall current sensor power stabilizing circuit of claim 1, wherein: the positive reference voltage unit comprises a reference voltage chip U1, positive voltage regulating resistors R1 and R2, a diode D3 and a current limiting resistor R5; the negative reference voltage unit comprises a reference voltage chip U2, positive voltage regulating resistors R3 and R4, a diode D4 and a current limiting resistor R6.
3. The open loop hall current sensor power stabilizing circuit of claim 2, wherein: the positive voltage power output unit comprises a power tube Q1, the power tube Q1 adopts a power triode BCX56, the negative voltage power output unit comprises a power tube Q2, and the power tube Q2 adopts a power triode BCX53.
4. A power stabilizing circuit of an open loop hall current sensor according to claim 3, wherein: the positive pole of the diode D3 is connected with the base electrode of the power tube Q1, the negative pole of the diode D3 is connected with the input pole of the positive reference voltage unit, and PN junction temperature drift of the diode D3 can offset PN junction temperature drift of the power tube Q1.
5. The open loop hall current sensor power stabilizing circuit according to claim 4, wherein: the power supply circuit further comprises a positive protection diode D1 and a negative protection diode D2, wherein the positive electrode of the positive protection diode D1 is connected with a positive voltage input end, the negative electrode of the positive protection diode D1 is connected with the input end of the positive power unit, the negative electrode of the negative protection diode D2 is connected with a negative voltage input end, and the positive electrode of the negative protection diode D2 is connected with the input end of the negative power unit.
6. The open loop hall current sensor power stabilizing circuit of claim 5, wherein: still include positive filter capacitor C1 and C3 and negative filter capacitor C2 and C4, the one end of positive filter capacitor C1 and C3 all connects the power input positive pole, and the other end all grounds, negative filter capacitor C2 and C4 one end all connects the power input negative pole, and the other end all grounds.
7. The open loop hall current sensor power stabilizing circuit of claim 6, wherein: the filter also comprises an input positive filter capacitor C5 and an output negative filter capacitor C6, wherein one end of the positive filter capacitor C5 is connected with the power output anode, the other end of the positive filter capacitor C5 is connected with the power output cathode, and the other end of the negative filter capacitor C6 is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322532332.1U CN220933054U (en) | 2023-09-18 | 2023-09-18 | Open-loop Hall current sensor power supply stabilizing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322532332.1U CN220933054U (en) | 2023-09-18 | 2023-09-18 | Open-loop Hall current sensor power supply stabilizing circuit |
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| Publication Number | Publication Date |
|---|---|
| CN220933054U true CN220933054U (en) | 2024-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322532332.1U Active CN220933054U (en) | 2023-09-18 | 2023-09-18 | Open-loop Hall current sensor power supply stabilizing circuit |
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| Country | Link |
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| CN (1) | CN220933054U (en) |
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- 2023-09-18 CN CN202322532332.1U patent/CN220933054U/en active Active
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