CN210608929U - Direct current output switching circuit - Google Patents
Direct current output switching circuit Download PDFInfo
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- CN210608929U CN210608929U CN201921986622.0U CN201921986622U CN210608929U CN 210608929 U CN210608929 U CN 210608929U CN 201921986622 U CN201921986622 U CN 201921986622U CN 210608929 U CN210608929 U CN 210608929U
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Abstract
The application provides a direct current output switching circuit, relates to power electronics technology field. The direct current output switching circuit includes: the same plurality of branches, switching circuits and output circuits; the output circuit includes: a plurality of sub-output circuits connected in series, one sub-output circuit corresponding to one branch circuit; the output end of each branch circuit is connected with a switching circuit, and the switching circuit is respectively connected with the positive output end of the output circuit, the negative output end of the output circuit and the common connection point of adjacent sub-output circuits in the output circuit; the switching circuit is used for controlling the positive output ends of the multiple branches after the outputs of the multiple branches are connected in series to be connected with the positive output end of the output circuit, controlling the negative output ends of the multiple branches after the outputs of the multiple branches are connected in series to be connected with the negative output end of the output circuit, and when the outputs of the multiple branches are connected in series, the output end of each branch is connected with one sub-output circuit. The method and the device can avoid the output bias risk and ensure the reliability of the circuit.
Description
Technical Field
The utility model relates to a power electronic technology field particularly, relates to a direct current output switching circuit.
Background
With the development of technology, the demand of dc output power is getting larger and larger, and in order to be compatible with high voltage and low voltage and large current, a series-parallel switching circuit of dc output is widely used.
Direct current series-parallel switching generally involves switching between the outputs of multiple branches, and in a series mode, the total output voltage is the sum of the output voltages of the multiple branches to meet high-voltage requirements; in the parallel mode, the total output current is the sum of the output currents of the plurality of branches to meet the requirement of large current. However, since the total output voltage is relatively high in the series mode, the output circuit thereof usually uses a plurality of sub-output circuits in series.
Because each sub-output circuit in series connection can not completely ensure the same impedance, the series connection has bias risk, the reliability is ensured by increasing a voltage-sharing resistor, the capacitance value of an output capacitor is larger, the leakage current is larger, and the resistance value of the voltage-sharing resistor is smaller in order to ensure the voltage-sharing performance, which inevitably leads to the increase of power consumption.
SUMMERY OF THE UTILITY MODEL
An object of the present application is to provide a dc output switching circuit to avoid the output bias risk and ensure the reliability of the circuit, aiming at the above-mentioned deficiencies in the prior art.
In order to achieve the above purpose, the technical solutions adopted in the embodiments of the present application are as follows:
in a first aspect, an embodiment of the present application provides a dc output switching circuit, including: the same plurality of branches, switching circuits and output circuits; the output circuit includes: a plurality of sub-output circuits connected in series, wherein one sub-output circuit corresponds to one branch circuit;
the output end of each branch circuit is connected with the switching circuit, and the switching circuit is respectively connected with the positive output end of the output circuit, the negative output end of the output circuit and the common connection point of the adjacent sub-output circuits in the output circuit;
the switching circuit is used for controlling a plurality of positive output ends of the branches after output series connection to be connected with the positive output end of the output circuit, controlling a plurality of negative output ends of the branches after output series connection to be connected with the negative output end of the output circuit, and when the outputs of the branches are in series connection, the output end of each branch is connected with one sub-output circuit.
Optionally, the switching circuit includes: a plurality of switching circuits, the plurality of switching circuits comprising: a first switch circuit, a second switch circuit, a third switch circuit;
the negative output end of each branch circuit and the positive output end of the next branch circuit are respectively connected with the common point of two adjacent sub-output circuits through one first switch circuit;
in the plurality of branches, the positive output end of the first branch is respectively connected with the positive output end of at least one other branch through at least one second switch circuit; the negative output end of the first branch is respectively connected with the negative output end of the at least one other branch through at least one third switch circuit.
Optionally, each of the switch circuits includes: a switching device.
Optionally, the switch device is a relay, a metal oxide semiconductor MOS transistor, or an insulated gate bipolar transistor IGBT.
Optionally, each sub-output circuit is a capacitor bank.
Optionally, the plurality of branches are output branches of a plurality of secondary windings in the same transformer respectively.
Optionally, the plurality of branches are output branches of secondary windings in a plurality of transformers, and each branch corresponds to one secondary winding of one transformer.
Optionally, each branch is an output branch formed by connecting a plurality of secondary windings in parallel, and the plurality of secondary windings are respectively from a plurality of transformers;
different branches correspond to different secondary windings in the plurality of transformers.
Optionally, each branch is an output branch formed by connecting a plurality of secondary windings in parallel, and the plurality of secondary windings are respectively from a plurality of transformers;
different branches correspond to the secondary windings of different transformers.
Optionally, the negative output end of the plurality of sub-output circuits connected in series is grounded.
The beneficial effect of this application is:
in the direct current output switching circuit that this application provided, the accessible sets up the switching circuit between the same a plurality of branches and output circuit, positive output after the output of a plurality of branches is established ties is connected with output circuit's positive output, negative output after the output of a plurality of branches is established ties is controlled and output circuit's negative output is connected, realize the output of a plurality of branches and establish ties, and still can control under the output series mode of a plurality of branches, a sub output circuit is connected to the output of every branch, make the voltage that every sub output circuit exported be the voltage of every branch output promptly, to the same a plurality of branches, can make the voltage that a plurality of sub output circuit exported the same, realize the voltage-sharing of a plurality of sub output circuits, the reliability of circuit has been guaranteed, and need not to increase voltage-sharing resistance, also can not bring extra consumption and increase.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a dc output switching circuit according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another dc output switching circuit according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a dc output switching circuit applied to two secondary windings of the same transformer according to an embodiment of the present application;
fig. 4 is a schematic diagram of a dc output switching circuit applied to three secondary windings of the same transformer according to an embodiment of the present application;
fig. 5 is a schematic diagram of a dc output switching circuit applied to secondary windings of two transformers according to an embodiment of the present application;
fig. 6 is a schematic diagram of a dc output switching circuit from two output branches after parallel connection of secondary windings of two transformers according to an embodiment of the present application;
fig. 7 is a schematic diagram of a dc output switching circuit from two output branches after parallel connection of secondary windings of four transformers according to an embodiment of the present application.
Icon:
11-branch; 12-a switching circuit; 13-an output circuit; 131-a sub-output circuit; 121-a first switching circuit; 122-a second switching circuit; 123-a third switching circuit; 1-a first branch; 2-a second branch; 3-a third branch;
S1A, S11A, S1B, S11B — first switching device; s21, S2-second switching device, S3, S31-third switching device;
t1 — first transformer; t2 — second transformer; t3-third transformer; t4-fourth transformer; c1 — first capacitor bank; c2 — second capacitor bank; c3-third capacitor bank.
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.
In order to avoid the bias risk of each sub-output circuit used in series in the series mode and ensure the reliability of the circuit, the embodiments of the present application provide the dc output switching circuit provided in each of the following embodiments, which can control a plurality of branches in the series mode through the switching circuit arranged between the same plurality of branches and output circuits, and the output end of each branch is connected with one sub-output circuit, so that the voltages output by the plurality of sub-output circuits are the same, voltage sharing of the plurality of sub-output circuits is realized, the reliability of the circuit is ensured, and no voltage sharing resistor is needed to be added, and no additional power consumption increase is caused.
The dc output switching circuit provided in the embodiments of the present application is explained below with reference to a plurality of examples. Fig. 1 is a schematic structural diagram of a dc output switching circuit according to an embodiment of the present disclosure. As shown in fig. 1, the dc output switching circuit may include: the same plurality of branches 11, switching circuits 12 and output circuits 13. The output circuit 13 includes: and a plurality of sub-output circuits 131 connected in series, wherein one sub-output circuit 131 corresponds to one branch 11, and the number of sub-output circuits 131 in the output circuit 13 is the same as that of the branches 11.
The output terminal of each branch 11 is connected to a switching circuit 12, and the switching circuit 12 is connected to the positive output terminal of the output circuit 13, the negative output terminal of the output circuit 13, and a common connection point of adjacent sub-output circuits 131 in the output circuit 13, respectively.
The switching circuit 12 is used to control the positive output ends of the plurality of branches 11 after being serially connected to be connected to the positive output end of the output circuit 13, control the negative output ends of the plurality of branches 11 after being serially connected to be connected to the negative output end of the output circuit 13, and when the outputs of the plurality of branches 11 are serially connected, the output end of each branch 11 is connected to one sub-output circuit 131.
In the solution of the present application, each branch 11 is a dc output branch, and the branches 11 are the same branch, that is, the output voltages of the branches 11 are all the same. On the output side, there may be one corresponding sub-output circuit 131 for each branch 11. The plurality of sub-output circuits 131 are connected in series. The positive output terminal of the output circuit 13 is a positive voltage output terminal Vout +, which may be a positive output terminal after the plurality of sub-output circuits 131 are connected in series, and the negative output terminal of the output circuit 13 is a negative voltage output terminal Vout-, which may be a negative output terminal after the plurality of sub-output circuits 131 are connected in series. In one possible embodiment, the negative output terminal of the output circuit 13 may be grounded, and in this mode, the negative output terminal of the output circuit 13 is the ground terminal (GND).
The switching circuit 12 arranged between the output end of each branch 11 and the output circuit 13 can control the positive output ends of the plurality of branches 11 after being serially connected to be connected with the positive output end of the output circuit 13, and control the negative output ends of the plurality of branches 11 after being serially connected to be connected with the negative output end of the output circuit 13, so that the output serial mode of the plurality of branches 11 is realized. In the output series mode, the output voltage of the output circuit 13 is the sum of the output voltages of the plurality of branches 11, and is applicable to a high-voltage output situation. The switching circuit 12 may further control the output terminal of each branch 11 to be connected to one sub-output circuit 131 when the outputs of the plurality of branches 11 are connected in series, so that the output voltage of the sub-output circuit 131 is the output voltage of the corresponding branch 11. Since the plurality of branches 11 connected in series are all the same branches, that is, branches having the same output voltage, when the plurality of branches 11 are in the series mode, the output voltages of the plurality of sub-output circuits 131 in the output circuit 13 are the same, voltage balancing of each sub-output circuit 131 in the output circuit 13 is realized, and the risk of bias voltage is avoided.
In addition, the switching circuit 12 can also control the positive output ends of the plurality of branches 11 after output parallel connection to be connected with the positive output end of the output circuit 13, and the negative output ends of the plurality of branches 11 after output parallel connection to be connected with the negative output end of the output circuit 13, so that the output parallel mode of the plurality of branches 11 is realized. In the output parallel mode, the output voltage of the output circuit 13 is the output voltage of each branch 11, and the output current of the output circuit 13 is the total output current of the plurality of branches 11, so that the output parallel mode is suitable for low-voltage large-current output occasions.
The switching circuit 12 may be connected to a control switch or a controller, and the control switch or the controller controls the output series-parallel switching circuit to operate in the following fields: the switching circuit is suitable for high-voltage output occasions or low-voltage large-current output occasions, and then the state change of the switching circuit 12 is controlled, so that the outputs of the multiple branches 11 are connected in series or in parallel. It should be noted that other devices or devices may be used to control the operation of the output series-parallel switching circuit in other manners, which is not limited in this application.
The embodiment of the application provides a direct current output switching circuit, the accessible sets up the switching circuit between the same a plurality of branches and output circuit, positive output after the output of a plurality of branches is established ties is connected with output circuit's positive output, control the output of a plurality of branches and establish ties negative output after being connected with output circuit's negative output and be connected, realize the output of a plurality of branches and establish ties, and still can control under the output series mode of a plurality of branches, a sub-output circuit is connected to the output of every branch, make the voltage that every sub-output circuit outputs be the voltage of every branch output promptly, to the same a plurality of branches, can make the voltage that a plurality of sub-output circuit exported the same, realize the voltage-sharing of a plurality of sub-output circuit, the reliability of circuit has been guaranteed, and need not to increase the voltage-sharing resistance, also can not bring extra consumption and increase.
Optionally, on the basis of the dc output switching circuit, an embodiment of the present application may further provide a dc output switching circuit. Fig. 2 is a schematic structural diagram of another dc output switching circuit according to an embodiment of the present disclosure. As shown in fig. 2, the switching circuit 12 as shown above may include: a plurality of switching circuits, which may include: a first switch circuit 121, a second switch circuit 122, and a third switch circuit 123.
The negative output terminal of each branch 11 and the positive output terminal of the next branch are connected to the common point of two adjacent sub-output circuits 131 through a first switch circuit 121.
In the plurality of branches 11, the positive output terminal of the first branch 11 is connected to the positive output terminal of at least one other branch 11 through at least one second switch circuit 122; the negative output terminal of the first branch 11 is connected to the negative output terminal of at least one other branch 11 via at least one third switching circuit 123.
When the first switch circuit 121 is closed and the second switch circuit 122 and the third switch circuit 123 are both open, the outputs of the plurality of branches 11 are connected in series, so that each branch 11 is connected to one corresponding sub-output circuit 131. Each branch 11, a first switch circuit 121 and a sub-output circuit connected to the first switch circuit 121 form a loop of the branch, and for a plurality of branches 11, since the branches 11 are the same, the voltage is naturally balanced, and no additional voltage-sharing resistor is required. In the mode of serially connecting the outputs of the plurality of branches 11, the output voltage of each sub-output circuit 131 is the output voltage of the corresponding branch 11, and the output voltage of the output circuit 13 is the sum of the output voltages of the plurality of branches 11, which is suitable for high-voltage output occasions.
When the first switch circuit 121 is turned off and the second switch circuit 122 and the third switch circuit 123 are both turned on, the outputs of the plurality of branches 11 are connected in parallel, the output voltage of the output circuit 13 is the output voltage of each branch 11, and the output current of the output circuit 13 is the sum of the output currents of the plurality of branches 11, so that the circuit is suitable for low-voltage large-current occasions.
The first switch circuits 121 are closed as shown above, meaning that all of the first switch circuits 121 are closed, and the second switch circuits 122 and the third switch circuits 123 are open, meaning that all of the second switch circuits 122 and all of the third switch circuits are open.
The first switch circuits 121 are open, meaning that all of the first switch circuits 121 are open, and the second switch circuits 122 and the third switch circuits 123 are closed, meaning that all of the second switch circuits 122 and all of the third switch circuits are closed.
Optionally, each switching circuit may include: a switching device. The switching device may be, for example, a relay, a metal-oxide-semiconductor (MOS) field effect Transistor, an Insulated Gate Bipolar Transistor (IGBT), or the like. Of course, the switching device may be other types of switching devices, and the application is not limited thereto.
It should be noted that the first switch circuit 121, the second switch circuit 122, and the third switch circuit 123 may be respectively a switch circuit with different connection modes and connection positions, and may respectively include: a plurality of them. If there are N branches 11, N being a positive number greater than or equal to 2, the first switch circuit 121 may include 2N-2 switch circuits, and the second switch circuit 122 and the third switch circuit 123 may include N-1 switch circuits, respectively, for the N branches 11.
Alternatively, each sub-output circuit 131 may be a capacitor bank, and each capacitor bank may be a capacitor, or a plurality of capacitors may be connected in series.
In this direct current output switching circuit, each switch circuit's in the accessible switching circuit 12 state change realizes switching between the output series connection of two at least branch roads 11 and the output is parallelly connected to under the series mode, guarantee output circuit's voltage-sharing performance, realize simpler, circuit cost is lower, and the practicality is stronger, and need not additionally to increase voltage-sharing resistance, also can not bring extra consumption increase.
In one possible implementation, the plurality of branches 11 as shown above are output branches of a plurality of secondary windings in the same transformer. And the output branch of each secondary winding is an output branch obtained after the output branch of the secondary winding is subjected to rectification processing. In this embodiment, the same transformer has the same transformation parameters for the different secondary windings, and the same output voltage.
The dc output switching circuit provided in the above embodiment is exemplified by taking the output branches of a plurality of secondary windings in the same transformer as an example. Fig. 3 is a schematic diagram of a dc output switching circuit applied to two secondary windings of the same transformer according to an embodiment of the present application. As shown in fig. 3, the dc output switching circuit includes: two branches 11, a switching circuit 12 and an output circuit 13. The two branches 11 are a first branch 1 and a second branch 2, where the first branch 1 is an output branch after the output of the secondary side 1 of the first transformer T1 is rectified, and the second branch 2 is an output branch after the output of the secondary side 2 of the first transformer T1 is rectified.
The switching circuit 12 includes: a first switching device S1A, a first switching device S1B, a second switching device S2, and a third switching device S3, wherein the first switching circuit 121 includes: a first switching device S1A and a first switching device S1B; the second switch circuit 122 includes a second switch device S2, and the third switch circuit 123 includes a third switch device S3. The output circuit 13 includes a first capacitor bank C1 and a second capacitor bank C2 connected in series. The sub-output circuit 131 is a capacitor bank.
The negative output of the first branch 1 is connected to the common point of the first capacitor bank C1 and the second capacitor bank C2 via a first switching device S1A. The positive output of the second branch 2 is also connected to the common point of the first C1 and the second C2 capacitor bank via a first switching device S1B.
The positive output terminal of the first branch 1 is connected to the positive output terminal of the second branch 2 through the second switching device S2, and the negative output terminal of the first branch 1 is further connected to the negative output terminal of the second branch 2 through the third switching device S3.
The positive output end of the first branch circuit 1 is further connected with the positive output end of the output circuit 13, and the negative output end of the second branch circuit 2 is further connected with the negative output end of the output circuit 13.
When the first switching device S1A and the first switching device S1B are both open and the second switching device S2 and the third switching device S3 are both closed, the outputs of the first branch 1 and the second branch 2 are connected in parallel.
When the first switching device S1A and the first switching device S1B are both closed and the second switching device S2 and the third switching device S3 are both open, the outputs of the first branch circuit 1 and the second branch circuit 2 are connected in series, and the output voltage of the output circuit 13 is the sum of the output voltages of the first branch circuit 1 and the second branch circuit 2. In addition, the first branch 1, the first switching device S1A and the first capacitor group C1 form a loop, so that the voltage of the first capacitor group C1 is the output voltage of the first branch 1, and the second branch 2, the first switching device S1B and the second capacitor group C2 form a loop, so that the voltage of the second capacitor group C2 is the output voltage of the second branch 2. The transformation parameters of the corresponding secondary windings of the first branch 1 and the second branch 2 are the same, so that the voltages of the first capacitor bank C1 and the second capacitor bank C2 are the same, and the voltage-sharing performance of the circuit in the series mode is ensured.
Fig. 4 is a schematic diagram of a dc output switching circuit applied to three secondary windings of the same transformer according to an embodiment of the present application. As shown in fig. 4, the dc output switching circuit includes: three branches 11, a switching circuit 12 and an output circuit 13. In fig. 4, in addition to the first branch 1 and the second branch 2, the present invention further includes: and a third branch 3, where the third branch 3 is an output branch after the output of the secondary side 3 of the first transformer T1 is rectified.
On the basis of fig. 3, the switching circuit 12 further includes: a first switching device S11A, a first switching device S11B, a second switching device S21, a third switching device S31. The output circuit 13 further includes a third capacitor bank C3.
The connection modes of the negative output end of the first branch 1, the positive output end of the first branch 1, and the positive output end of the second branch 2 may be similar to those in fig. 3, and are not described herein again. The negative output of the second branch 2 is connected to the common point of the second capacitor bank C2 and the third capacitor bank C3 via a first switching device S11A. The positive output terminal of the third branch 3 is also connected to the common point of the second capacitor bank C2 and the third capacitor bank C3 via the first switching device S11B.
The negative output terminal of the third branch 3 is further connected to the negative output terminal of the output circuit 13.
When the first switching device S1A, the first switching device S1B, the first switching device S11A and the first switching device S11B are all open, and the second switching device S2, the second switching device S21, the third switching device S3 and the third switching device S31 are all closed, the outputs of the first branch 1, the second branch 2 and the third branch 3 are connected in parallel.
When the first switching device S1A, the first switching device S1B, the first switching device S11A and the first switching device S11B are all closed, and the second switching device S2, the second switching device S21, the third switching device S3 and the third switching device S31 are all open, the outputs of the first branch 1, the second branch 2 and the third branch 3 are connected in series, and the output voltage of the output circuit 13 is the sum of the output voltages of the first branch 1, the second branch 2 and the third branch 3. In addition, the first branch 1, the first switching device S1A and the first capacitor bank C1 form a loop, so that the voltage of the first capacitor bank C1 is the output voltage of the first branch 1; the second branch 2, the first switching device S1B, the first switching device S11A and the second capacitor bank C2 form a loop, so that the voltage of the second capacitor bank C2 is the output voltage of the second branch 2; the third branch 3, the first switching device S11B and the third capacitor bank C3 form a loop, so that the voltage of the third capacitor bank C3 is the output voltage of the third branch 3. The transformation parameters of the corresponding secondary windings of the first branch 1, the second branch 2 and the third branch 3 are the same, so that the voltages of the first capacitor bank C1, the second capacitor bank C2 and the third capacitor bank C3 are the same, and the voltage-sharing performance of the circuit in the series mode is ensured.
In another possible implementation, the plurality of branches 11 as shown above are output branches of secondary windings of a plurality of transformers, and each branch corresponds to one secondary winding of one transformer. And the output branch of each secondary winding is an output branch obtained after the output branch of the secondary winding is subjected to rectification processing. In this embodiment, the parameters of the plurality of transformers are the same, and the output voltages thereof are also the same.
The dc output switching circuit provided in the above embodiment is exemplified by taking the output branches of the secondary windings in a plurality of transformers as an example. Fig. 5 is a schematic diagram of a dc output switching circuit applied to secondary windings of two transformers according to an embodiment of the present application. The dc output switching circuit shown in fig. 5 is different from the dc output switching circuit shown in fig. 3 in that a first branch 1 and a second branch 2 in fig. 3 are output branches of two secondary windings of the first transformer T1, respectively; in fig. 5, the first branch 1 and the second branch 2 are output branches of two secondary windings in the first transformer T1 and the second transformer T2, respectively.
The connection mode and voltage-sharing principle of the dc output switching circuit are the same as those in fig. 3, and are not described herein again.
In yet another possible implementation, each branch 11 as shown above is an output branch formed by connecting a plurality of secondary windings in parallel, the plurality of secondary windings are respectively from a plurality of transformers, and different branches 11 correspond to different secondary windings in the plurality of transformers. The output branch of each secondary winding may be an output branch of the secondary winding after the output of the secondary winding is rectified. The following description is given by taking two secondary windings of two transformers corresponding to two output branches as an example. Fig. 6 is a schematic diagram of a dc output switching circuit from two output branches after parallel connection of secondary windings of two transformers according to an embodiment of the present application. The dc output switching circuit shown in fig. 6 is different from the dc output switching circuit shown in fig. 3 in that a first branch 1 and a second branch 2 in fig. 3 are output branches of two secondary windings of the first transformer T1, respectively; in fig. 6, the first branch 1 is an output branch in which the windings of the secondary side 1 of the first transformer T1 and the secondary side 1 of the second transformer T2 are connected in parallel, and the second branch 2 is an output branch in which the windings of the secondary side 2 of the first transformer T1 and the secondary side 2 of the second transformer T2 are connected in parallel.
The connection mode and voltage-sharing principle of the dc output switching circuit are the same as those in fig. 3, and are not described herein again.
Further, based on the dc output switching circuit shown in fig. 6, analogy shows that the secondary windings of 3 transformers correspond to two output branches. The difference from the dc output switching circuit shown in fig. 6 is that each branch is an output branch in which 3 secondary windings are connected in parallel, specifically, the first branch 1 is an output branch in which the secondary windings 1 in 3 transformers are connected in parallel, and the second branch 2 is an output branch in which the secondary windings 2 in 3 transformers are connected in parallel. In another embodiment of analogy, an embodiment in which the secondary windings of two transformers correspond to 3 output branches is different from the above-mentioned dc output switching circuit shown in fig. 6 in that each of the two transformers respectively includes 3 secondary windings, and this embodiment includes 3 branches, which can be understood as a parallel scheme of 2 dc output switching circuits shown in fig. 4, specifically, a first branch 1 is an output branch in which the secondary windings 1 of 2 transformers are connected in parallel, a second branch 2 is an output branch in which the secondary windings 2 of 2 transformers are connected in parallel, and a third branch 3 is an output branch in which the secondary windings 3 of 2 transformers are connected in parallel. And the following embodiments are all within the protection scope of the present application.
In yet another possible implementation manner, each branch 11 as shown above is an output branch with a plurality of secondary windings connected in parallel, and the plurality of secondary windings are respectively from a plurality of transformers; different branches 11 correspond to the secondary windings of different transformers. In this implementation, each transformer contains only one secondary winding. The output branch of each secondary winding may be an output branch of the secondary winding after the output of the secondary winding is rectified. The following description takes the secondary windings of four transformers corresponding to two output branches as an example. Fig. 7 is a schematic diagram of a dc output switching circuit from two output branches after parallel connection of secondary windings of four transformers according to an embodiment of the present application. The dc output switching circuit shown in fig. 7 is different from the dc output switching circuit shown in fig. 3 in that a first branch 1 and a second branch 2 in fig. 3 are output branches of two secondary windings of the first transformer T1, respectively; in fig. 7, the first branch 1 is an output branch in which the windings of the secondary side of the first transformer T1 and the secondary side of the third transformer T3 are connected in parallel, and the second branch 2 is an output branch in which the windings of the secondary side of the second transformer T2 and the secondary side of the fourth transformer T4 are connected in parallel.
The connection mode of the dc output switching circuit and the implementation principle of voltage sharing are the same as those in fig. 3, which is referred to above, and are not described herein again.
Further, based on the dc output switching circuit shown in fig. 7, analogy shows that the secondary windings of 6 transformers correspond to two output branches. The difference from the dc output switching circuit shown in fig. 7 is that each branch is an output branch in which 3 secondary windings are connected in parallel, specifically, the first branch 1 is an output branch in which the secondary windings of 3 transformers are connected in parallel, and the second branch 2 is an output branch in which the secondary windings of the remaining 3 transformers are connected in parallel. In another embodiment of the analogy, an embodiment in which the secondary windings of 6 transformers correspond to 3 output branches is different from the above-mentioned dc output switching circuit shown in fig. 7 in that the embodiment includes 3 branches, each branch is an output branch in which 2 secondary windings are connected in parallel, and specifically, 3 branches are output branches in which the secondary windings of 2 different transformers are connected in parallel, respectively. And the following embodiments are all within the protection scope of the present application.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A dc output switching circuit, comprising: the same plurality of branches, switching circuits and output circuits; the output circuit includes: a plurality of sub-output circuits connected in series, wherein one sub-output circuit corresponds to one branch circuit;
the output end of each branch circuit is connected with the switching circuit, and the switching circuit is respectively connected with the positive output end of the output circuit, the negative output end of the output circuit and the common connection point of the adjacent sub-output circuits in the output circuit;
the switching circuit is used for controlling a plurality of positive output ends of the branches after output series connection to be connected with the positive output end of the output circuit, controlling a plurality of negative output ends of the branches after output series connection to be connected with the negative output end of the output circuit, and when the outputs of the branches are in series connection, the output end of each branch is connected with one sub-output circuit.
2. The circuit of claim 1, wherein the switching circuit comprises: a plurality of switching circuits, the plurality of switching circuits comprising: a first switch circuit, a second switch circuit, a third switch circuit;
the negative output end of each branch circuit and the positive output end of the next branch circuit are respectively connected with the common point of two adjacent sub-output circuits through one first switch circuit;
in the plurality of branches, the positive output end of the first branch is respectively connected with the positive output end of at least one other branch through at least one second switch circuit; the negative output end of the first branch is respectively connected with the negative output end of the at least one other branch through at least one third switch circuit.
3. The circuit of claim 2, wherein each of the switching circuits comprises: a switching device.
4. The circuit of claim 3, wherein the switching device is a relay, a Metal Oxide Semiconductor (MOS) transistor, or an Insulated Gate Bipolar Transistor (IGBT).
5. The circuit of claim 1, wherein each of the sub-output circuits is a capacitor bank.
6. The circuit according to any of claims 1-4, wherein the plurality of branches are output branches of a plurality of secondary windings of the same transformer.
7. The circuit according to any of claims 1-4, wherein a plurality of said branches are output branches of secondary windings of a plurality of transformers, respectively, and each of said branches corresponds to a secondary winding of a transformer.
8. The circuit according to any one of claims 1-4, wherein each of the branches is an output branch with a plurality of secondary windings connected in parallel, and the plurality of secondary windings are respectively from a plurality of transformers;
different branches correspond to different secondary windings in the plurality of transformers.
9. The circuit according to any one of claims 1-4, wherein each of the branches is an output branch with a plurality of secondary windings connected in parallel, and the plurality of secondary windings are respectively from a plurality of transformers;
different branches correspond to the secondary windings of different transformers.
10. The circuit according to any of claims 1-4, wherein the negative output terminal of the plurality of sub-output circuits connected in series is grounded.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022188774A1 (en) * | 2021-03-09 | 2022-09-15 | 西安特来电智能充电科技有限公司 | High-voltage output switching circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022188774A1 (en) * | 2021-03-09 | 2022-09-15 | 西安特来电智能充电科技有限公司 | High-voltage output switching circuit |
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Assignee: Xi'an teride lingchong New Energy Technology Co., Ltd Assignor: Xi'an TGOOD Intelligent Charging Technology Co.,Ltd. Contract record no.: X2020370010026 Denomination of utility model: DC output switching circuit Granted publication date: 20200522 License type: Common License Record date: 20201130 |
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Address after: E206-2, R & D building, building e, HUanpu science and Technology Industrial Park, 211 tianguba Road, high tech Zone, Xi'an City, Shaanxi Province, 710000 Patentee after: Xi'an Telai Intelligent Charging Technology Co.,Ltd. Address before: E206-2, R & D building, building e, HUanpu science and Technology Industrial Park, 211 tianguba Road, high tech Zone, Xi'an City, Shaanxi Province, 710000 Patentee before: XI'AN TGOOD INTELLIGENT CHARGING TECHNOLOGY Co.,Ltd. |