CN215344065U - Auxiliary source turn-off circuit and bidirectional power supply - Google Patents
Auxiliary source turn-off circuit and bidirectional power supply Download PDFInfo
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- CN215344065U CN215344065U CN202121432530.5U CN202121432530U CN215344065U CN 215344065 U CN215344065 U CN 215344065U CN 202121432530 U CN202121432530 U CN 202121432530U CN 215344065 U CN215344065 U CN 215344065U
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Abstract
The utility model relates to an auxiliary source turn-off circuit and a bidirectional power supply, wherein in the auxiliary source turn-off circuit, the positive input end of a first diode is connected with a live wire of an AC power supply, the negative input end of the first diode is connected with a first voltage division module, the positive input end of a second diode is connected with a zero line of the AC power supply, and the negative input end of the second diode is connected with the first voltage division module; the first voltage division module is connected with the second voltage division module in series, and the second voltage division module is grounded; and a target node between the first voltage division module and the second voltage division module is connected with the turn-off control module, and the turn-off control module is used for turning off the auxiliary source when no AC input exists and starting the auxiliary source when the AC input exists. According to the AC input control method and the AC input control device, the AC power can be conveyed to the target node after being clamped by the diode and subjected to voltage division by the voltage division module, then the turn-off control module can determine whether the AC input exists according to the voltage value of the AC power at the target node, then the auxiliary source is turned off when the AC input does not exist, and the auxiliary source is started when the AC input exists.
Description
Technical Field
The application relates to the field of power supplies, in particular to an auxiliary source turn-off circuit and a bidirectional power supply.
Background
In the bidirectional conversion power supply architecture and the portable energy storage bidirectional conversion power supply circuit, when AC is input, auxiliary power supply AC is used for carrying out auxiliary power supply on each main power circuit through two auxiliary sources in standby or starting; in the absence of AC input, each main power circuit is supplied with auxiliary power from a battery via two auxiliary sources during standby.
However, when there is no AC input, and the battery performs auxiliary power supply after starting, the electric energy provided by the battery also performs auxiliary power supply to each main power circuit through two auxiliary sources, and the electric energy is wasted through the auxiliary source that the direct current does not necessarily pass through.
SUMMERY OF THE UTILITY MODEL
To solve the above technical problem or at least partially solve the above technical problem, the present application provides an auxiliary source shutdown circuit and a bidirectional power supply.
In a first aspect, the present application provides an auxiliary source turn-off circuit, comprising: the first diode, the second diode, the first voltage division module, the second voltage division module and the turn-off control module;
the positive input end of the first diode is connected with a live wire of an AC power supply, the negative input end of the first diode is connected with a first voltage division module, the positive input end of the second diode is connected with a zero line of the AC power supply, and the negative input end of the second diode is connected with the first voltage division module;
the first voltage division module is connected with the second voltage division module in series, and the second voltage division module is grounded;
the target node between the first voltage division module and the second voltage division module is connected with the turn-off control module, and the turn-off control module is used for turning off the auxiliary source when no AC input exists and starting the auxiliary source when the AC input exists.
Optionally, the shutdown control module includes: MCU;
an enable pin of the MCU is connected with the target node, a control pin of the MCU is connected with a control end of the auxiliary source, the MCU is used for starting the auxiliary source when an AC voltage value at the target node is larger than or equal to a preset value, and turning off the auxiliary source when the AC voltage value at the target node is smaller than the preset value.
Optionally, the first pressure splitting module comprises: a first resistor;
the first connection end of the first resistor is connected with the negative connection end of the first diode, the first connection end of the first resistor is further connected with the negative connection end of the second diode, and the second connection end of the first resistor is connected with the target node.
Optionally, the first pressure splitting module comprises: a second resistor, a third resistor and a fourth resistor;
the first connection end of the second resistor is connected with the negative connection end of the first diode, the first connection end of the second resistor is further connected with the negative connection end of the second diode, the second connection end of the second resistor is connected with the first connection end of the third resistor, the second connection end of the third resistor is connected with the first connection end of the fourth resistor, and the second connection end of the fourth resistor is connected with the target node.
Optionally, the second die separation module comprises: a fifth resistor;
and a first connecting end of the fifth resistor is connected with the target node, and a second connecting end of the fifth resistor is grounded.
Optionally, the method further comprises: a voltage regulator diode;
the voltage stabilizing diode is connected with the second voltage division module in parallel.
Optionally, the method further comprises: a first filter capacitor and a second filter capacitor;
the first filter capacitor is connected with the second voltage division module in parallel, one end of the second filter capacitor is connected with the negative connection end of the first diode and the negative connection end of the second diode respectively, and the other end of the second filter capacitor is grounded.
In a second aspect, the present application provides a bi-directional power supply, comprising: a rectifier bridge, a first auxiliary source, a second auxiliary source, a bidirectional AC/DC converter, a bidirectional DC/DC converter, a battery, and an auxiliary source turn-off circuit as set forth in any one of the first aspect;
the AC input is connected with the power input end of the first auxiliary source through the rectifier bridge, the AC input is also connected with the power input end of the auxiliary source turn-off circuit, and the output end of the auxiliary source turn-off circuit is connected with the first auxiliary source;
the output end of the first auxiliary source is connected with the first power supply input end of the second auxiliary source, and the second power supply input end of the second auxiliary source is connected with the anode of the battery;
the AC input is connected with a first group of connecting ends of the bidirectional AC/DC converter through a standby switch, a second group of connecting ends of the bidirectional AC/DC converter are connected with a first group of connecting ends of the bidirectional DC/DC converter, and the second group of connecting ends of the bidirectional DC/DC converter are respectively connected with the anode and the cathode of the battery.
Optionally, the method further comprises: a first capacitor and a second capacitor;
two ends of the first capacitor are respectively connected with two output ends of the rectifier bridge;
and two ends of the second capacitor are respectively connected with the second group of connecting ends of the bidirectional AC/DC converter.
Optionally, the method further comprises: a third diode and a fourth diode;
the positive connecting end of the third diode is connected with the output end of the first auxiliary source, and the negative connecting end of the third diode is connected with the first power supply input end of the second auxiliary source;
and the positive connecting end of the third diode is connected with the positive electrode of the battery, and the negative connecting end of the third diode is connected with the second power supply input end of the second auxiliary source.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
according to the AC input control method and the AC input control device, the AC power can be conveyed to the target node after being clamped by the diode and subjected to voltage division by the voltage division module, then the turn-off control module can determine whether the AC input exists according to the voltage value of the AC power at the target node, then the auxiliary source is turned off when the AC input does not exist, and the auxiliary source is started when the AC input exists.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a circuit diagram of an auxiliary source shutdown circuit according to an embodiment of the present disclosure;
fig. 2 is a circuit diagram of a bidirectional power supply according to an embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
When no AC input exists, when the battery is in auxiliary power supply after starting, the electric energy provided by the battery can be supplied to each main power circuit in an auxiliary mode through two auxiliary sources, and the electric energy is wasted due to unnecessary auxiliary sources through direct current. Therefore, the embodiment of the application provides an auxiliary power source turn-off circuit, so that when the direct current of a battery is subjected to auxiliary power supply, a power supply path is changed, and the waste of electric energy caused by unnecessary auxiliary power sources is avoided.
As shown in fig. 1, the auxiliary source turn-off circuit includes: a first diode D1, a second diode D2, a first voltage division module 01, a second voltage division module 02 and a turn-off control module 03;
the positive input end of a first diode D1 is connected with the live wire of an AC power supply, the negative input end of a first diode D1 is connected with the first voltage division module 01, the positive input end of a second diode D2 is connected with the zero wire of the AC power supply, and the negative input end of a second diode D2 is connected with the first voltage division module 01;
the first voltage division module 01 is connected with the second voltage division module 02 in series, and the second voltage division module 02 is grounded;
a target node between the first voltage division module 01 and the second voltage division module 02 is connected to the shutdown control module 03, and the shutdown control module 03 is configured to shut off the auxiliary source when there is no AC input and start the auxiliary source when there is an AC input.
According to the AC input control method and the AC input control device, the AC power can be conveyed to the target node after being clamped by the diode and subjected to voltage division by the voltage division module, then the turn-off control module can determine whether the AC input exists according to the voltage value of the AC power at the target node, then the auxiliary source is turned off when the AC input does not exist, and the auxiliary source is started when the AC input exists.
In another embodiment of the present application, the shutdown control module 03 includes: MCU;
the MCU is used for starting the auxiliary source when the AC voltage value at the target node is larger than or equal to a preset value, and turning off the auxiliary source when the AC voltage value at the target node is smaller than the preset value.
In still another embodiment of the present application, the first division module 01 includes: a first resistor;
the first connection end of the first resistor is connected with the negative connection end of the first diode D1, the first connection end of the first resistor is connected with the negative connection end of the second diode D2, and the second connection end of the first resistor is connected with the target node.
In one embodiment of the present application, the first voltage dividing module may include only one first resistor, and the first resistor divides the voltage with the second voltage dividing module to achieve the purpose of adjusting the voltage of the AC power source at the target node.
In still another embodiment of the present application, as shown in fig. 1, the first voltage dividing module 01 includes: a second resistor R1, a third resistor R2 and a fourth resistor R3;
the first connection end of the second resistor R1 is connected with the negative connection end of the first diode D1, the first connection end of the second resistor R1 is further connected with the negative connection end of the second diode D2, the second connection end of the second resistor R1 is connected with the first connection end of the third resistor R2, the second connection end of the third resistor R2 is connected with the first connection end of the fourth resistor R3, and the second connection end of the fourth resistor R3 is connected with the target node.
In one embodiment of the present application, the first voltage dividing module may include three resistors, and the three resistors divide the voltage with the second voltage dividing module to achieve the purpose of adjusting the voltage of the AC power source at the target node.
In still another embodiment of the present application, the second division module 02 includes: a fifth resistor R4;
the first connection end of the fifth resistor R4 is connected with the target node, and the second connection end of the fifth resistor R4 is grounded.
In one embodiment of the present application, the second voltage dividing module may include only one fifth resistor, and the fifth resistor divides the voltage with the first voltage dividing module to achieve the purpose of adjusting the voltage of the AC power source at the target node.
In another embodiment of the present application, the method further includes: a zener diode D3;
a zener diode D3 is connected in parallel with the second voltage division block 02.
In the embodiment of the application, the voltage stabilizing diode is used for limiting the fluctuation range of the voltage at two ends of the second voltage division module, and further limiting the voltage fluctuation range at the target node.
In another embodiment of the present application, the method further includes: a first filter capacitor C1 and a second filter capacitor C2;
the filter capacitor C1 is connected in parallel with the second voltage division module 02, one end of the second filter capacitor C2 is connected with the negative connection end of the first diode and the negative connection end of the second diode respectively, and the other end of the second filter capacitor C2 is grounded.
In the embodiment of the application, the filter capacitor is used for filtering.
In another embodiment of the present application, there is also provided a bidirectional power supply, as shown in fig. 2, including: a rectifier bridge 11, a first auxiliary source 12, a second auxiliary source 13, a bidirectional AC/DC converter 14, a bidirectional DC/DC converter 15, a battery 16, and an auxiliary source shutdown circuit 17 as in the previous embodiment;
the AC input is connected with the power input end of a first auxiliary source 12 through a rectifier bridge 11, the AC input is also connected with the power input end of an auxiliary source turn-off circuit 17, and the output end of the auxiliary source turn-off circuit 17 is connected with the first auxiliary source 12;
the output end of the first auxiliary source 12 is connected with the first power input end of the second auxiliary source 13, and the second power input end of the second auxiliary source 13 is connected with the positive pole of the battery 16;
the AC input is connected to a first set of terminals of the bidirectional AC/DC converter 14 via the standby switch, a second set of terminals of the bidirectional AC/DC converter 14 is connected to a first set of terminals of the bidirectional DC/DC converter 15, and the second set of terminals of the bidirectional DC/DC is connected to the positive and negative terminals of the battery 16, respectively.
Thus, when AC is input, auxiliary power AC is input from path 1 during standby, VAUX1 is generated by auxiliary source 1, the general design is such that the VAUX1 voltage is greater than VAUX2 (battery voltage) (so that no battery energy is lost during AC input), and VAUX1 provides auxiliary power to the various main power circuits via auxiliary source 2.
When AC input exists, after starting up, because the boosted bus is larger than the AC input rectification voltage, auxiliary power supply is input from the bus through a path 2, VAUX1 is generated by an auxiliary source 1, and VauX1 supplies auxiliary power to each main power circuit through the auxiliary source 2.
In the absence of AC input, the auxiliary power supply battery Vaux2 is input from the path 4 during standby, and auxiliary power is supplied to each main power circuit by the auxiliary source 2.
By adding a circuit which switches off the auxiliary source 1 when there is no AC input, the auxiliary supply is supplied by the path 4, thus saving the losses of the auxiliary supply on the bi-directional DC/DC and auxiliary source 1 and improving the efficiency of the battery supply when there is no AC input.
In another embodiment of the present application, the method further includes: a first capacitor C3 and a second capacitor C4;
two ends of the first capacitor C3 are respectively connected with two output ends of the rectifier bridge 11;
the two ends of the second capacitor C4 are connected to the second set of connection terminals of the bidirectional AC/DC converter 14.
In another embodiment of the present application, the method further includes: a third diode D4 and a fourth diode D5;
the positive connection terminal of the third diode D4 is connected to the output terminal of the first auxiliary source 12, and the negative connection terminal of the third diode D4 is connected to the first power input terminal of the second auxiliary source 13;
the positive connection of the third diode D4 is connected to the positive terminal of the battery 16, and the negative connection of the third diode D4 is connected to the second power input of the second auxiliary source.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An auxiliary source turn-off circuit, comprising: the first diode, the second diode, the first voltage division module, the second voltage division module and the turn-off control module;
the positive input end of the first diode is connected with a live wire of an AC power supply, the negative input end of the first diode is connected with the first voltage division module, the positive input end of the second diode is connected with a zero line of the AC power supply, and the negative input end of the second diode is connected with the first voltage division module;
the first voltage division module is connected with the second voltage division module in series, and the second voltage division module is grounded;
the target node between the first voltage division module and the second voltage division module is connected with the turn-off control module, and the turn-off control module is used for turning off the auxiliary source when no AC input exists and starting the auxiliary source when the AC input exists.
2. The auxiliary source turn-off circuit of claim 1, wherein the turn-off control module comprises: MCU;
an enable pin of the MCU is connected with the target node, a control pin of the MCU is connected with a control end of the auxiliary source, the MCU is used for starting the auxiliary source when an AC voltage value at the target node is larger than or equal to a preset value, and turning off the auxiliary source when the AC voltage value at the target node is smaller than the preset value.
3. The auxiliary source turn-off circuit of claim 1, wherein the first voltage division module comprises: a first resistor;
the first connection end of the first resistor is connected with the negative connection end of the first diode, the first connection end of the first resistor is further connected with the negative connection end of the second diode, and the second connection end of the first resistor is connected with the target node.
4. The auxiliary source turn-off circuit of claim 1, wherein the first voltage division module comprises: a second resistor, a third resistor and a fourth resistor;
the first connection end of the second resistor is connected with the negative connection end of the first diode, the first connection end of the second resistor is further connected with the negative connection end of the second diode, the second connection end of the second resistor is connected with the first connection end of the third resistor, the second connection end of the third resistor is connected with the first connection end of the fourth resistor, and the second connection end of the fourth resistor is connected with the target node.
5. The auxiliary source turn-off circuit of claim 1, wherein the second voltage division module comprises: a fifth resistor;
and a first connecting end of the fifth resistor is connected with the target node, and a second connecting end of the fifth resistor is grounded.
6. The auxiliary source turn-off circuit of claim 1, further comprising: a voltage regulator diode;
the voltage stabilizing diode is connected with the second voltage division module in parallel.
7. The auxiliary source turn-off circuit of claim 1, further comprising: a first filter capacitor and a second filter capacitor;
the first filter capacitor is connected with the second voltage division module in parallel, one end of the second filter capacitor is connected with the negative connection end of the first diode and the negative connection end of the second diode respectively, and the other end of the second filter capacitor is grounded.
8. A bi-directional power supply, comprising: a rectifier bridge, a first auxiliary source, a second auxiliary source, a bidirectional AC/DC converter, a bidirectional DC/DC converter, a battery, and an auxiliary source turn-off circuit as claimed in any one of claims 1 to 7;
the AC input is connected with the power input end of the first auxiliary source through the rectifier bridge, the AC input is also connected with the power input end of the auxiliary source turn-off circuit, and the output end of the auxiliary source turn-off circuit is connected with the first auxiliary source;
the output end of the first auxiliary source is connected with the first power supply input end of the second auxiliary source, and the second power supply input end of the second auxiliary source is connected with the anode of the battery;
the AC input is connected with a first group of connecting ends of the bidirectional AC/DC converter through a standby switch, a second group of connecting ends of the bidirectional AC/DC converter are connected with a first group of connecting ends of the bidirectional DC/DC converter, and the second group of connecting ends of the bidirectional DC/DC converter are respectively connected with the anode and the cathode of the battery.
9. The bi-directional power supply of claim 8, further comprising: a first capacitor and a second capacitor;
two ends of the first capacitor are respectively connected with two output ends of the rectifier bridge;
and two ends of the second capacitor are respectively connected with the second group of connecting ends of the bidirectional AC/DC converter.
10. The bi-directional power supply of claim 8, further comprising: a third diode and a fourth diode;
the positive connecting end of the third diode is connected with the output end of the first auxiliary source, and the negative connecting end of the third diode is connected with the first power supply input end of the second auxiliary source;
and the positive connecting end of the third diode is connected with the positive electrode of the battery, and the negative connecting end of the third diode is connected with the second power supply input end of the second auxiliary source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121432530.5U CN215344065U (en) | 2021-06-25 | 2021-06-25 | Auxiliary source turn-off circuit and bidirectional power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121432530.5U CN215344065U (en) | 2021-06-25 | 2021-06-25 | Auxiliary source turn-off circuit and bidirectional power supply |
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| Publication Number | Publication Date |
|---|---|
| CN215344065U true CN215344065U (en) | 2021-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121432530.5U Active CN215344065U (en) | 2021-06-25 | 2021-06-25 | Auxiliary source turn-off circuit and bidirectional power supply |
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| CN (1) | CN215344065U (en) |
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- 2021-06-25 CN CN202121432530.5U patent/CN215344065U/en active Active
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