CN215954177U - Power supply current regulating circuit - Google Patents
Power supply current regulating circuit Download PDFInfo
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- CN215954177U CN215954177U CN202121937602.1U CN202121937602U CN215954177U CN 215954177 U CN215954177 U CN 215954177U CN 202121937602 U CN202121937602 U CN 202121937602U CN 215954177 U CN215954177 U CN 215954177U
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Abstract
The utility model discloses a power supply current regulating circuit which comprises a power supply unit, a current sampling unit and a switch unit, wherein the power supply unit is provided with a current feedback end, the current sampling unit comprises a first resistor and a second resistor, one end of the first resistor and one end of the second resistor are respectively and electrically connected with the current feedback end, the other end of the first resistor and the other end of the second resistor are respectively and electrically connected with the ground, and the switch unit is connected with at least one of the first resistor and the second resistor in series. The power supply current regulating circuit provided by the utility model can accurately output the required current, and is simple to operate, convenient and rapid.
Description
Technical Field
The utility model relates to the technical field of current regulation, in particular to a power supply current regulating circuit.
Background
The current adjustment of the current constant-current power supply on the market is mainly realized by adjusting an adjustable resistor, and the current adjusting device has the advantages that the adjusting range is wider, the current can be randomly changed within a certain range, and the current adjusting device has the defects that the current required by the current needs to be slowly adjusted for fixing the adjusting current, the adjusting time is longer, and the production efficiency is influenced. And cannot be adjusted to the desired current without the user having test equipment.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a power supply current regulating circuit which can accurately output required current and is simple, convenient and rapid to operate.
The technical scheme adopted by the power supply current regulating circuit disclosed by the utility model is as follows:
the utility model provides a supply current regulating circuit, includes power supply unit, electric current sampling unit and switch element, power supply unit is equipped with the current feedback end, the current sampling unit includes first resistance and second resistance, the one end of first resistance and the one end of second resistance are connected with current feedback end electricity respectively, the other end of first resistance and the other end of second resistance respectively with ground electricity connection, at least one in switch element and first resistance and the second resistance is established ties.
Preferably, the current sampling unit further includes a variable resistor, one end of the variable resistor is electrically connected to the current feedback end, and the other end of the variable resistor is connected in series with the switch unit and then grounded.
Preferably, the switch unit includes a plurality of key switches, and the key switches are connected in series with at least one of the first resistor and the second resistor.
Preferably, the switch unit is a dial switch, and the dial switch is connected in series with at least one of the first resistor and the second resistor.
The power supply current regulating circuit disclosed by the utility model has the beneficial effects that: the power supply unit collects current of the current feedback end through the current sampling unit, when the switch unit is closed, the resistance value of the current sampling unit is the parallel value of the first resistor and the second resistor, and when the switch unit is disconnected, the resistance value of the current sampling unit is one of the first resistor and the second resistor. The resistance value of the current sampling unit is changed by the on-off of the switch unit, so that the power supply unit outputs the current with the required fixed value. The output current is regulated through the switch unit, and the operation is simple, convenient and rapid.
Drawings
FIG. 1 is a schematic diagram of a power supply current regulating circuit according to the present invention
FIG. 2 is a schematic diagram of another embodiment of the power current regulator circuit of the present invention
Fig. 3 is a schematic diagram of another embodiment of the power supply current regulating circuit of the present invention.
Detailed Description
The utility model will be further elucidated and described with reference to the embodiments and drawings of the specification:
referring to fig. 1 and 2, the power current regulating circuit includes a power unit, a current sampling unit, and a switch unit, where the power unit is provided with a current feedback terminal. The current sampling unit comprises a first resistor and a second resistor, one end of the first resistor and one end of the second resistor are respectively electrically connected with the current feedback end, the other end of the first resistor and the other end of the second resistor are respectively electrically connected with the ground, and the switch unit is connected with at least one of the first resistor and the second resistor in series.
The power supply unit collects current of the current feedback end through the current sampling unit, when the switch unit is closed, the resistance value of the current sampling unit is the parallel value of the first resistor and the second resistor, and when the switch unit is disconnected, the resistance value of the current sampling unit is one of the first resistor and the second resistor. The resistance value of the current sampling unit is changed by the on-off of the switch unit, so that the power supply unit outputs the current with the required fixed value. The output current is regulated through the switch unit, and the operation is simple, convenient and rapid.
In this embodiment, when the switch unit is connected in series with the first resistor and the second resistor, respectively, the resistance of the current sampling unit may be adjusted to any one of the first resistor and the second resistor, and the parallel connection value of the first resistor and the second resistor, that is, three resistances may be adjusted. When the switching unit is connected in series with one of the first resistor and the second resistor, the resistance value of the current sampling unit can be adjusted to be the resistance value of one of the first resistor and the second resistor and the parallel value of the first resistor and the second resistor, namely, two resistance values can be adjusted. In this implementation, can also increase the third resistance according to the demand, the one end and the current feedback end electric connection of third resistance, ground connection behind the other end ground connection of third resistance or the series switch unit. After the third resistor is added, the number of adjustable resistance values can be increased, and therefore the requirements of different output currents are met.
Referring to fig. 3, in the present embodiment, the current sampling unit further includes a variable resistor, one end of the variable resistor is electrically connected to the current feedback end, and the other end of the variable resistor is connected in series with the switch unit and then grounded. After the variable resistor is added, whether the variable resistor is connected or not can be selected through the on-off of the switch unit, when fine adjustment is needed, the variable resistor can be connected, and then fine adjustment within a certain range is carried out, so that different requirements are met.
Referring to fig. 2 again, in the embodiment, the switch unit includes a plurality of key switches, and the key switches are connected in series with at least one of the first resistor and the second resistor. When a resistor is connected with the switch unit in series, the resistor is directly connected with a key switch in series, and then whether the resistor is connected or not is selected through the on-off of the key switch.
Referring to fig. 1 again, in another embodiment, the switch unit is a dial switch, and the dial switch is connected in series with at least one of the first resistor and the second resistor. When a resistor is connected with the switch unit in series, the resistor is directly connected with the dial switch in series, and then whether the resistor is connected or not is selected through the on-off of the dial switch.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (4)
1. The utility model provides a supply current regulating circuit, its characterized in that includes power supply unit, electric current sampling unit and switch element, power supply unit is equipped with the current feedback end, the electric current sampling unit includes first resistance and second resistance, the one end of first resistance and the one end of second resistance are connected with current feedback end electricity respectively, the other end of first resistance and the other end of second resistance respectively with ground electricity connection, at least one in switch element and first resistance and the second resistance is established ties.
2. The power supply current regulating circuit according to claim 1, wherein the current sampling unit further comprises a variable resistor, one end of the variable resistor is electrically connected with the current feedback terminal, and the other end of the variable resistor is connected with the switching unit in series and then grounded.
3. The power supply current regulating circuit of claim 1, wherein said switching unit comprises a plurality of key switches connected in series with at least one of a first resistor and a second resistor.
4. The supply current regulation circuit of claim 1 wherein the switching unit is a dip switch connected in series with at least one of the first resistor and the second resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121937602.1U CN215954177U (en) | 2021-08-18 | 2021-08-18 | Power supply current regulating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121937602.1U CN215954177U (en) | 2021-08-18 | 2021-08-18 | Power supply current regulating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215954177U true CN215954177U (en) | 2022-03-04 |
Family
ID=80432777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121937602.1U Expired - Fee Related CN215954177U (en) | 2021-08-18 | 2021-08-18 | Power supply current regulating circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215954177U (en) |
-
2021
- 2021-08-18 CN CN202121937602.1U patent/CN215954177U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220304 |