CN215734024U - DC and AC sharing circuit - Google Patents
DC and AC sharing circuit Download PDFInfo
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- CN215734024U CN215734024U CN202121840208.6U CN202121840208U CN215734024U CN 215734024 U CN215734024 U CN 215734024U CN 202121840208 U CN202121840208 U CN 202121840208U CN 215734024 U CN215734024 U CN 215734024U
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Abstract
The embodiment of the utility model discloses a DC and AC shared circuit, which comprises: the device comprises a rectifier bridge, a filtering module and a voltage detection module; the input end of the rectifier bridge is respectively connected with an Alternating Current (AC) power supply and a Direct Current (DC) power supply; the output end of the rectifier bridge is connected with the input end of the filter module; the output end of the filtering module is connected with the input end of the voltage detection module; the output end of the voltage detection module is respectively connected with the input ends of the AC path and the DC path. Through the scheme of the embodiment, the conversion efficiency of AC power supply and DC power supply is improved, the problem that AC/DC in the original power supply circuit needs to be separately supplied or the DC power supply efficiency is low is solved, the detection circuit is greatly simplified, the PCB area is reduced, and the application in a miniaturized single-board product is facilitated.
Description
Technical Field
The embodiment of the utility model relates to the power supply technology of electronic products, in particular to a direct current and alternating current sharing circuit.
Background
In a general power supply circuit of an electronic product, an AC (alternating current) power supply circuit and a DC (direct current) power supply circuit are separately used for power supply transmission, one circuit is used for supplying an AC power supply, the other circuit is used for supplying a DC power supply, and the AC power supply and the DC power supply can not be used commonly, so that waste of a power supply line is inevitably caused in actual use; or partial products of AC and DC power supply share one line, but the shared scheme has the defects that the DC power supply also needs to pass through a high-frequency transformer or a wide-voltage DC/DC conversion chip, so that unnecessary loss is caused, and the DC power supply efficiency is greatly reduced; the traditional AC and DC shared circuit is very complex, needs 4 paths of decision circuits, increases the size of a circuit board, and is not suitable for small-sized equipment.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a direct current and alternating current shared circuit, which can improve the conversion efficiency of AC power supply and DC power supply, solve the problem that AC/DC in the original power supply circuit needs to be supplied with power separately or the DC power supply efficiency is low, greatly simplify a detection circuit, reduce the area of a PCB (printed circuit board), and facilitate the application in a miniaturized single-board product.
The embodiment of the utility model also provides a direct current and alternating current sharing circuit, which can comprise: the device comprises a rectifier bridge, a filtering module and a voltage detection module;
the input end of the rectifier bridge is respectively connected with an Alternating Current (AC) power supply and a Direct Current (DC) power supply;
the output end of the rectifier bridge is connected with the input end of the filter module;
the output end of the filtering module is connected with the input end of the voltage detection module;
the output end of the voltage detection module is respectively connected with the input ends of the AC path and the DC path.
In an exemplary embodiment of the present invention, the voltage detection module may include: a voltage division detection unit and a path control unit;
the input end of the voltage division detection unit is used as the input end of the voltage detection module;
the output end of the path control unit is used as the output end of the voltage detection module;
the output end of the partial pressure detection unit is connected with the input end of the path control unit;
the voltage division detection unit is used for detecting whether the current power supply source is an AC power supply source or a DC power supply source according to the output voltage of the filtering module;
the path control unit is configured to conduct the AC path when the detection result of the voltage division detection unit is the AC power supply source, and conduct the DC path when the detection result of the voltage division detection unit is the DC power supply source.
In an exemplary embodiment of the present invention, the AC path may include: a high-frequency voltage transformation module;
the input end of the high-frequency transformation module is used as the input end of an AC path and is connected with the AC path connecting end of the path control unit, and the output end of the high-frequency transformation module is connected with the output end of a direct-current power supply;
and the first end of the DC path is used as the input end of the DC path and is connected with the DC path connecting end of the path control unit, and the second end of the DC path is connected with the output end of the direct-current power supply.
In an exemplary embodiment of the present invention, the partial voltage detection unit may include: a voltage dividing circuit and a switching circuit;
the voltage division circuit may be configured to divide an output voltage of the filter module;
the switching circuit may be configured to be turned on or off according to a voltage division result for distinguishing the current power supply source as the AC power supply source or the DC power supply source.
In an exemplary embodiment of the present invention, the output of the filtering module may include a first output and a second output; the second output end is grounded;
the voltage dividing circuit may include: a first resistor R1 and a second resistor R2;
the switching circuit may include: a third resistor R3 and a first NMOS transistor Q1;
a first end of the first resistor R1 is used as an input end of the voltage division detection unit and is connected with a first output end of the filtering module;
a first end of the second resistor R2 is connected with a second end of the first resistor R1;
a second end of the second resistor R2 is grounded;
a first end of the third resistor R3 is connected with a first end of the second resistor R2;
a second end of the third resistor R3 is grounded;
the grid electrode of the first NMOS transistor Q1 is connected with the first end of the second resistor R2;
the source electrode of the first NMOS tube Q1 is grounded;
the drain electrode of the first NMOS transistor Q1 is used as the output end of the voltage division detection unit.
In an exemplary embodiment of the present invention, the path control unit may include: an AC path control circuit and a DC path control circuit;
the AC path control circuit may be configured to turn on the AC path when the detection result of the voltage division detection unit is an AC power supply source, and turn off the AC path when the detection result of the voltage division detection unit is a DC power supply source;
the DC path control circuit may be configured to turn on the DC path when the detection result of the voltage division detection unit is the DC power supply source, and turn off the DC path when the detection result of the voltage division detection unit is the AC power supply source.
In an exemplary embodiment of the present invention, the output of the filtering module may include a first output and a second output; the second output end is grounded;
the AC path control circuit may include: a fourth resistor R4 and a first PMOS tube Q2;
the DC path control circuit includes: a fifth resistor R5 and a second NMOS transistor Q3;
a first end of the fourth resistor R4 is connected to a first output end of the filtering module;
a second end of the fourth resistor R4 is connected with the gate of the first PMOS transistor Q2;
the grid electrode of the first PMOS pipe Q2 is connected with the output end of the voltage division detection unit;
the source electrode of the first PMOS pipe Q2 is connected with the first output end of the filtering module;
the drain electrode of the first PMOS pipe Q2 is used as an AC path connecting end;
the grid electrode of the second NMOS transistor Q3 is connected with the grid electrode of the first PMOS transistor Q2;
the drain electrode of the second NMOS tube Q3 is connected with the first output end of the filtering module;
the source electrode of the second NMOS tube Q3 is used as a DC path connecting end;
a first end of the fifth resistor R5 is connected with the gate of the second NMOS transistor Q3;
the second end of the fifth resistor R5 is connected to the source of the second NMOS transistor Q3.
In an exemplary embodiment of the present invention, the high frequency transforming module may include: a transformer T1 and a third NMOS transistor Q4;
the primary coil of the transformer T1 is connected to the second output terminal of the filter module and the AC path connection terminal of the path control unit;
the secondary coil of the transformer T1 is used as the output end of the direct current power supply;
the drain of the third NMOS transistor Q4 is connected to the input of the DC path, and the gate of the third NMOS transistor Q4 is used as a clock signal input; the source of the third NMOS transistor Q4 is grounded.
In an exemplary embodiment of the present invention, the AC path may further include: a filter circuit; the filter circuit includes: a first filter capacitor C1 and a second filter capacitor C2;
the first filter capacitor C1 and the second filter capacitor C2 are connected in parallel between the secondary coils.
In an exemplary embodiment of the present invention, the rectifier bridge may be a half-wave rectifier bridge.
In an exemplary embodiment of the present invention, the filtering module may include: a third filter capacitor C3, a fourth filter capacitor C4, a fifth filter capacitor C5, a sixth filter capacitor C6 and a filter inductor L1;
the third filter capacitor C3, the fourth filter capacitor C4, the fifth filter capacitor C5 and the sixth filter capacitor C6 are sequentially connected in parallel between the output ends of the rectifier bridge;
the filter inductor L1 is connected in series between the fourth filter capacitor C4 and the fifth filter capacitor C5.
In an exemplary embodiment of the present invention, the third filter capacitor C3, the fifth filter capacitor C5, and the sixth filter capacitor C6 may be electrolytic capacitors.
The dc and ac common circuit according to the embodiment of the present invention may include: the device comprises a rectifier bridge, a filtering module and a voltage detection module; the input end of the rectifier bridge is respectively connected with an Alternating Current (AC) power supply and a Direct Current (DC) power supply; the output end of the rectifier bridge is connected with the input end of the filter module; the output end of the filtering module is connected with the input end of the voltage detection module; the output end of the voltage detection module is respectively connected with the input ends of the AC path and the DC path. Through the scheme of the embodiment, the conversion efficiency of AC power supply and DC power supply is improved, the problem that AC/DC in the original power supply circuit needs to be separately supplied or the DC power supply efficiency is low is solved, the detection circuit is greatly simplified, the PCB area is reduced, and the application in a miniaturized single-board product is facilitated.
Additional features and advantages of embodiments of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of the utility model. The objectives and other advantages of the embodiments of the utility model will be realized and attained by the structure particularly pointed out in the written description and 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 example serve to explain the principles of the utility model and not to limit the utility model.
FIG. 1 is a schematic diagram of a DC and AC common circuit framework according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a first prior art DC and AC sharing scheme;
FIG. 3 is a schematic diagram of a second prior art DC and AC sharing scheme;
FIG. 4 is a schematic diagram of a third prior art DC and AC sharing scheme;
FIG. 5 is a schematic diagram of a detection module according to a third conventional DC/AC sharing scheme;
FIG. 6 is a schematic diagram of the complete structure of the DC/AC sharing circuit according to the embodiment of the present invention;
FIG. 7 is a schematic circuit diagram of the DC/AC sharing circuit according to the embodiment of the present invention;
fig. 8 is a schematic diagram of a high-frequency transformer module according to an embodiment of the utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
An embodiment of the present invention further provides a dc and ac common circuit, as shown in fig. 1, which may include: the device comprises a rectifier bridge 1, a filtering module 2 and a voltage detection module 3;
the input end of the rectifier bridge 1 is respectively connected with an Alternating Current (AC) power supply source and a Direct Current (DC) power supply source;
the output end of the rectifier bridge 1 is connected with the input end of the filter module 2;
the output end of the filtering module 2 is connected with the input end of the voltage detection module 3;
the output of the voltage detection module 3 is connected to the input of an AC path 4 and a DC path 5, respectively.
The first current DC and AC sharing scheme is shown in fig. 2, where AC power supply and DC power supply are performed in two lines, the AC power supply passes through the rectifier bridge 1, the filter module 2, the high frequency transformer module 6, and the DC power output 7 (such as DC12V output), and the DC power supply directly supplies power to the DC power output (such as DC12V output) through another cable. However, the scheme needs two power supply cables, so that one cable is suspended and wasted in practical use, and the use value is not high.
The second current DC and AC sharing scheme is shown in fig. 3, AC power supply and DC power supply are performed by using a single line, the AC power supply passes through the rectifier bridge 1, the filter module 2, the high-frequency transformer module 6 or the wide-voltage DC/DC conversion module 9, and the DC power output 7 (for example, DC12V output), the DC power supply also passes through the rectifier bridge 1, the filter module 2, the high-frequency transformer module 6 or the wide-voltage DC/DC conversion module 9, and the DC power output 7 (for example, DC12V output), which may result in that the DC power supply does not need to pass through the high-frequency transformer module 6 or the wide-voltage DC/DC conversion module 9, power is wasted in the high-frequency transformer or the wide-voltage DC/DC conversion module, conversion efficiency is reduced, and power supply efficiency is greatly reduced. However, the DC power supply line in the scheme has white loss in the high-frequency voltage transformation module or the wide-voltage DC/DC conversion module, so that the conversion efficiency is reduced, and the DC power supply efficiency is lower.
The third current sharing scheme for DC and AC is shown in fig. 4, wherein, as shown in fig. 5, the detection module 10 controls the NMOS transistor switch S1 to control the pass switch (e.g., AC + switch K1, AC-switch K2, DC + switch K3, DC-switch K4) for DC passing through the RLC filter (RLC) to high and AC passing through the RLC filter to low. However, this solution has the following drawbacks: 1. 4 detection modules and 4 groups of switch circuits are needed, the circuit redundancy is complex, the cost is high, and the theoretical failure rate is high under the condition that a plurality of devices are arranged; 2. on a miniaturized product, the circuit devices are more, the PCB area is large, and the layout and wiring are difficult.
In an exemplary embodiment of the present invention, an AC and DC common transmission circuit is provided, which includes a rectifier bridge 1, a filter module 2, and a voltage detection module 3, and by setting the voltage detection module 3, after an AC power supply (AC) and a DC power supply (DC) share the rectifier bridge 1 and the filter module 2, the AC power supply and the DC power supply (DC) are separated by the voltage detection module 3, so that the maximum conversion efficiency of the AC power supply and the DC power supply is achieved, the problem that the AC/DC power supply needs to be separated or the DC power supply efficiency is low in an original power supply circuit is solved, a detectable circuit is greatly simplified, the PCB area is reduced, and the transmission circuit is suitable for a product of a miniaturized single board.
In an exemplary embodiment of the present invention, as shown in fig. 6, the rectifier bridge 1 may be a half-wave rectifier bridge.
In an exemplary embodiment of the present invention, the rectifier bridge 1 may be constituted by diodes D1, D2, D3, D4.
In an exemplary embodiment of the present invention, the filtering module 2 may include: a third filter capacitor C3, a fourth filter capacitor C4, a fifth filter capacitor C5, a sixth filter capacitor C6 and a filter inductor L1;
the third filter capacitor C3, the fourth filter capacitor C4, the fifth filter capacitor C5 and the sixth filter capacitor C6 are sequentially connected in parallel between the output ends of the rectifier bridge;
the filter inductor L1 is connected in series between the fourth filter capacitor C4 and the fifth filter capacitor C5.
In an exemplary embodiment of the present invention, the third filter capacitor C3, the fifth filter capacitor C5, and the sixth filter capacitor C6 may be electrolytic capacitors.
In an exemplary embodiment of the present invention, as shown in fig. 6, the voltage detection module 3 may include: a divided voltage detection unit 31 and a path control unit 32;
the input end of the voltage division detection unit 31 is used as the input end of the voltage detection module 3;
the output end of the path control unit 32 is used as the output end of the voltage detection module 3;
the output end of the partial pressure detection unit 31 is connected with the input end of the path control unit 31;
the voltage division detecting unit 31 is configured to detect whether the current power supply source is an AC power supply source (AC, i.e.,) or a DC power supply source (DC, i.e.,);
the path control unit 32 is configured to turn on the AC path 4 when the detection result of the divided voltage detection unit 31 is an AC power supply (AC), and turn on the DC path 5 when the detection result of the divided voltage detection unit 31 is a DC power supply (DC).
In an exemplary embodiment of the present invention, the partial pressure detecting unit 31 may include: a voltage dividing circuit and a switching circuit;
the voltage division circuit may be configured to divide an output voltage of the filter module;
the switching circuit may be configured to be turned on or off according to a voltage division result for distinguishing the current power supply source as the AC power supply source or the DC power supply source.
In an exemplary embodiment of the present invention, as shown in fig. 6, the output of the filtering module 2 may include a first output terminal 21 and a second output terminal 22; the second output terminal 22 is grounded;
the voltage dividing circuit may include: a first resistor R1 and a second resistor R2; the switching circuit may include: a third resistor R3 and a first NMOS transistor Q1;
a first end of the first resistor R1 is used as an input end of the voltage division detection unit 31, and is connected to the first output end 21 of the filter module 2;
a first end of the second resistor R2 is connected with a second end of the first resistor R1;
a second end of the second resistor R2 is grounded;
a first end of the third resistor R3 is connected with a first end of the second resistor R2;
a second end of the third resistor R3 is grounded;
the grid electrode of the first NMOS transistor Q1 is connected with the first end of the second resistor R2;
the source electrode of the first NMOS tube Q1 is grounded;
the drain electrode of the first NMOS transistor Q1 is used as the output end of the voltage division detection unit.
In an exemplary embodiment of the present invention, the path control unit 32 may include: an AC path control circuit and a DC path control circuit;
the AC path control circuit may be configured to turn on the AC path when the detection result of the voltage division detection unit is an AC power supply source, and turn off the AC path when the detection result of the voltage division detection unit is a DC power supply source;
the DC path control circuit may be configured to turn on the DC path when the detection result of the voltage division detection unit is the DC power supply source, and turn off the DC path when the detection result of the voltage division detection unit is the AC power supply source.
In an exemplary embodiment of the present invention, the AC path control circuit may include: a fourth resistor R4 and a first PMOS tube Q2; the DC path control circuit may include: a fifth resistor R5 and a second NMOS transistor Q3;
a first end of the fourth resistor R4 is connected to the first output end 21 of the filter module 2;
a second end of the fourth resistor R4 is connected with the gate of the first PMOS transistor Q2;
the gate of the first PMOS transistor Q2 is connected to the output terminal of the voltage division detection unit 31;
the source electrode of the first PMOS transistor Q2 is connected to the first output end 21 of the filter module 2;
the drain electrode of the first PMOS pipe Q2 is used as an AC path connecting end (r);
the grid electrode of the second NMOS transistor Q3 is connected with the grid electrode of the first PMOS transistor Q2;
the drain electrode of the second NMOS transistor Q3 is connected to the first output terminal 21 of the filtering module;
the source of the second NMOS transistor Q3 is used as the DC path connection end;
a first end of the fifth resistor R5 is connected with the gate of the second NMOS transistor Q3;
the second end of the fifth resistor R5 is connected to the source of the second NMOS transistor Q3.
In the exemplary embodiment of the present invention, the embodiments of the present application are described by taking an AC power supply (AC) and a DC power supply (DC) as AC24V and DC12V, respectively.
In the exemplary embodiment of the present invention, after AC24V and DC12V are transmitted by sharing 1 line, and AC24V and DC12V are transmitted to the detection point in fig. 6 (i.e. the first output terminal 21 of the filter module 2), respectively, the difference is that the DC voltage corresponding to the AC24V line at the detection point is about 31V, the DC voltage corresponding to the DC12V line at the detection point is about 12V, when the first resistor R1 and the second resistor R2 are connected to GND through the detection point, the voltage at the center point of the connection line of the first resistor R1 and the second resistor R2 is sampled, and is connected to the gate of the first NMOS transistor Q1, when the AC24V line is powered, the voltage at the center point of the connection line of the first resistor R1 and the second resistor R2 is assumed to be V1, when the DC12V line is powered, the voltage at the center point of the connection line of the first resistor R1 and the second resistor R2 is assumed to be V2, when the voltage at the center point V1 is obviously, the center point of the connection line is 36867, 368672 is selected to be 368672V 8672, the grid voltage is V2 and is cut off; when the Q1 is turned on, the grid voltage of the Q2 is pulled low, the Q2 is turned on, the Q3 is turned off, and at the moment, the AC path can supply power, and the DC path cannot supply power; when Q1 is off, the Q2 gate voltage is pulled high, at which time Q2 is off and Q3 is on, at which time DC path 5 can supply power and AC path 4 cannot supply power.
In an exemplary embodiment of the present invention, as shown in fig. 7, the AC path 4 may include: a high-frequency voltage transformation module 6;
the input end of the high-frequency transformation module 6 is used as the input end of the AC path 4 and is connected with the AC path connecting end (a) of the path control unit 32, and the output end of the high-frequency transformation module 6 is connected with the DC power supply output end 7;
a first terminal of the DC path 5 is connected to the DC path connection terminal (c) of the path control unit 32 as an input terminal of the DC path 5, and a second terminal of the DC path is connected to the DC power output terminal 7.
In the exemplary embodiment of the present invention, as shown in fig. 7 and 8, the fifth is a DC path connection terminal, and when Q2 is turned off and Q3 is turned on, the DC path connection terminal is directly connected to the DC power output terminal 7 without passing through the high frequency transforming module 6; and the fourth is an AC path connecting end which is connected to the high-frequency transformation module 6 under the conditions that the Q2 is conducted and the Q3 is cut off, and the direct current is converted into high-frequency alternating current through the fast switch of the switch device in the high-frequency transformation module 6 and is converted into DC power supply to be output.
In an exemplary embodiment of the present invention, as shown in fig. 8, the high frequency transforming module 6 may include: a transformer T1 and a third NMOS transistor Q4;
the primary winding of the transformer T1 is connected to the second output of the filter module 2 and to the AC path connection of the path control unit 32;
the secondary coil of the transformer T1 is used as the DC power output end 7;
the drain of the third NMOS transistor Q4 is connected to the input of the DC path, and the gate of the third NMOS transistor Q4 serves as a clock signal (CRL) input; the source of the third NMOS transistor Q4 is grounded.
In an exemplary embodiment of the present invention, the AC path 4 may further include: a filter circuit 8; the filter circuit 8 includes: a first filter capacitor C1 and a second filter capacitor C2;
the first filter capacitor C1 and the second filter capacitor C2 are connected in parallel between the secondary coils.
In an exemplary embodiment of the present invention, the above scheme may include, but is not limited to, circuit application of DC12V/AC24V, which may be used in other AC, DC common circuits, such as compatibility of DC48V and AC24V, compatibility of DC19V and AC24V, and so on.
In an exemplary embodiment of the present invention, the embodiment of the present invention includes at least the following advantageous effects:
1. AC and DC power supply can share one power supply line, so that one power supply line is saved, and a power supply scheme is simplified;
2. according to the common power supply scheme, the DC power supply does not pass through the loss of a transformer or a wide-voltage DC/DC conversion module, and the DC power supply efficiency is greatly improved;
3. the voltage division detection circuit is very simple, the area of the PCB is reduced, the circuit is suitable for the design of miniaturized products, and the circuit has fewer electronic components, so that the failure rate is reduced, and the design cost is reduced.
In the description of the present invention, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "opposite", "four corners", "periphery", "mouth" structure ", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the structures referred to have specific orientations, are configured and operated in specific orientations, and thus, are not to be construed as limiting the present invention.
In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected," "directly connected," "indirectly connected," "fixedly connected," "mounted," and "assembled" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; the terms "mounted," "connected," and "fixedly connected" may be directly connected or indirectly connected through intervening media, or may be connected through two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (10)
1. A dc and ac common circuit, comprising: the device comprises a rectifier bridge, a filtering module and a voltage detection module;
the input end of the rectifier bridge is respectively connected with an Alternating Current (AC) power supply and a Direct Current (DC) power supply;
the output end of the rectifier bridge is connected with the input end of the filter module;
the output end of the filtering module is connected with the input end of the voltage detection module;
the output end of the voltage detection module is respectively connected with the input ends of the AC path and the DC path.
2. The dc and ac common circuit of claim 1, wherein the voltage detection module comprises: a voltage division detection unit and a path control unit;
the input end of the voltage division detection unit is used as the input end of the voltage detection module;
the output end of the path control unit is used as the output end of the voltage detection module;
the output end of the partial pressure detection unit is connected with the input end of the path control unit;
the voltage division detection unit is used for detecting whether the current power supply source is an AC power supply source or a DC power supply source according to the output voltage of the filtering module;
the path control unit is configured to conduct the AC path when the detection result of the voltage division detection unit is the AC power supply source, and conduct the DC path when the detection result of the voltage division detection unit is the DC power supply source.
3. The dc and AC common circuit of claim 2, wherein the AC path comprises: a high-frequency voltage transformation module;
the input end of the high-frequency transformation module is used as the input end of an AC path and is connected with the AC path connecting end of the path control unit, and the output end of the high-frequency transformation module is connected with the output end of a direct-current power supply;
and the first end of the DC path is used as the input end of the DC path and is connected with the DC path connecting end of the path control unit, and the second end of the DC path is connected with the output end of the direct-current power supply.
4. The dc and ac common circuit according to claim 2, wherein the voltage division detecting unit comprises: a voltage dividing circuit and a switching circuit;
the voltage division circuit is arranged for dividing the output voltage of the filtering module;
the switch circuit is set to be switched on or switched off according to a voltage division result for distinguishing the current power supply source as an AC power supply source or a DC power supply source.
5. The dc and ac common circuit of claim 4, wherein the output of said filtering module comprises a first output and a second output; the second output end is grounded;
the voltage dividing circuit includes: a first resistor R1 and a second resistor R2;
the switching circuit includes: a third resistor R3 and a first NMOS transistor Q1;
a first end of the first resistor R1 is used as an input end of the voltage division detection unit and is connected with a first output end of the filtering module;
a first end of the second resistor R2 is connected with a second end of the first resistor R1;
a second end of the second resistor R2 is grounded;
a first end of the third resistor R3 is connected with a first end of the second resistor R2;
a second end of the third resistor R3 is grounded;
the grid electrode of the first NMOS transistor Q1 is connected with the first end of the second resistor R2;
the source electrode of the first NMOS tube Q1 is grounded;
the drain electrode of the first NMOS transistor Q1 is used as the output end of the voltage division detection unit.
6. The dc and ac common circuit according to claim 2, 4 or 5, wherein the path control unit comprises: an AC path control circuit and a DC path control circuit;
the AC path control circuit is set to be switched on when the detection result of the voltage division detection unit is an AC power supply source, and is set to be switched off when the detection result of the voltage division detection unit is a DC power supply source;
the DC path control circuit is arranged to switch on the DC path when the detection result of the voltage division detection unit is the DC power supply source, and switch off the DC path when the detection result of the voltage division detection unit is the AC power supply source.
7. The dc and ac common circuit of claim 6, wherein the output of said filtering module comprises a first output and a second output; the second output end is grounded;
the AC path control circuit includes: a fourth resistor R4 and a first PMOS tube Q2;
the DC path control circuit includes: a fifth resistor R5 and a second NMOS transistor Q3;
a first end of the fourth resistor R4 is connected to a first output end of the filtering module;
a second end of the fourth resistor R4 is connected with the gate of the first PMOS transistor Q2;
the grid electrode of the first PMOS pipe Q2 is connected with the output end of the voltage division detection unit;
the source electrode of the first PMOS pipe Q2 is connected with the first output end of the filtering module;
the drain electrode of the first PMOS pipe Q2 is used as an AC path connecting end;
the grid electrode of the second NMOS transistor Q3 is connected with the grid electrode of the first PMOS transistor Q2;
the drain electrode of the second NMOS tube Q3 is connected with the first output end of the filtering module;
the source electrode of the second NMOS tube Q3 is used as a DC path connecting end;
a first end of the fifth resistor R5 is connected with the gate of the second NMOS transistor Q3;
the second end of the fifth resistor R5 is connected to the source of the second NMOS transistor Q3.
8. The dc and ac common circuit of claim 3, wherein the high frequency transforming module comprises: a transformer T1 and a third NMOS transistor Q4;
the primary coil of the transformer T1 is connected to the second output terminal of the filter module and the AC path connection terminal of the path control unit;
the secondary coil of the transformer T1 is used as the output end of the direct current power supply;
the drain of the third NMOS transistor Q4 is connected to the input of the DC path, and the gate of the third NMOS transistor Q4 is used as a clock signal input; the source of the third NMOS transistor Q4 is grounded.
9. The dc and AC common circuit of claim 8, wherein the AC path further comprises: a filter circuit; the filter circuit includes: a first filter capacitor C1 and a second filter capacitor C2;
the first filter capacitor C1 and the second filter capacitor C2 are connected in parallel between the secondary coils.
10. The dc and ac common circuit of any of claims 1-5, wherein said filtering module comprises: a third filter capacitor C3, a fourth filter capacitor C4, a fifth filter capacitor C5, a sixth filter capacitor C6 and a filter inductor L1;
the third filter capacitor C3, the fourth filter capacitor C4, the fifth filter capacitor C5 and the sixth filter capacitor C6 are sequentially connected in parallel between the output ends of the rectifier bridge;
the filter inductor L1 is connected in series between the fourth filter capacitor C4 and the fifth filter capacitor C5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121840208.6U CN215734024U (en) | 2021-08-06 | 2021-08-06 | DC and AC sharing circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121840208.6U CN215734024U (en) | 2021-08-06 | 2021-08-06 | DC and AC sharing circuit |
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| Publication Number | Publication Date |
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| CN215734024U true CN215734024U (en) | 2022-02-01 |
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| CN202121840208.6U Active CN215734024U (en) | 2021-08-06 | 2021-08-06 | DC and AC sharing circuit |
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| CN (1) | CN215734024U (en) |
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