CN218514093U - Wide voltage output circuit of parallel power supply - Google Patents

Abstract

The utility model provides a wide voltage output circuit of parallel power supply, which relates to the technical field of power supply and comprises a first input, a second input, a switching module and an output terminal, wherein the first input and the second input are connected with the switching module and output a first output voltage and a second output voltage to the switching module; the switching module is connected with the output terminal and used for switching the first output voltage and the second output voltage into series connection or parallel connection and then outputting the target voltage through the output terminal, so that the output voltage and current can be adjusted in a large range, the circuit can be suitable for different output voltage and current occasions, the cost and the failure rate of a parallel power supply are reduced, and the power utilization efficiency is high.

Description

Wide voltage output circuit of parallel power supply

Technical Field

The utility model relates to a power technical field, more specifically the utility model relates to a wide voltage output circuit of parallel power supply.

Background

With the rapid development of economy and technology, higher requirements are put forward on power supply, and novel automatic distribution network equipment is gradually put into application, namely, energy storage type electric switching-on and switching-off, microcomputer relay protection, networking remote monitoring and the like, and the reliable power supply of the equipment is a precondition for safe operation of a system. The parallel direct-current operating power supply designed aiming at the requirements of high reliability and high performance of an electric power system is a new generation of direct-current power supply equipment, is mainly applied to small-sized switch stations and user terminals, provides a reliable uninterrupted working power supply for secondary control circuits (such as intelligent terminals for microcomputer protection, indicator lamps, analog indicators and the like), avoids microcomputer protection losing protection when alternating current is lost, and solves the problem that the microcomputer protection fails due to the failure of a UPS caused by factors such as voltage, harmonic waves and the like in the operation process. Meanwhile, the DC operating power supply can be provided for primary switch equipment (a spring mechanism vacuum circuit breaker, a permanent magnet mechanism vacuum circuit breaker, an electric load switch and the like) meeting the power requirement of the DC operating power supply.

The relay protection, microcomputer control, operation and emergency lighting of the power system require reliable dc power supply. The quality index of the parallel direct current power supply is evaluated by taking safety, reliability and high efficiency as the first principle. Under the condition that the electrical technical indexes meet the normal use requirements, in order to enable the output voltage range of the power supply to be wider, the output current to be larger, the output power utilization rate to be higher, the efficiency to be higher and the cost to be lower, a wide-voltage large-current output circuit must be designed. The existing parallel power supply generally has the defects of narrow output voltage range, narrow constant power range and the like. Therefore, the scheme designs a wide voltage output circuit with low cost and reliability, can reduce the cost and the failure rate of the parallel power supply, and improves the efficiency and the utilization rate of the parallel power supply.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a wide voltage output circuit of a parallel power supply.

The utility model provides a technical scheme that its technical problem adopted is: the improvement of a parallel power supply wide voltage output circuit is that: the switching circuit comprises a first input, a second input, a switching module and an output terminal, wherein the first input and the second input are connected with the switching module and output a first output voltage and a second output voltage to the switching module; the switching module is connected with the output terminal and is used for switching the first output voltage and the second output voltage into series connection or parallel connection and then outputting a target voltage through the output terminal;

the switching module comprises a switch S1, a switch S2 and a switch S3,

an input end VIN1 of the first input is connected with one end of a change-over switch S2, a first connecting point is arranged between the input end VIN1 and the change-over switch S2, and the first connecting point is connected with an output end VO of the output terminal;

the grounding end GND1 of the first input is connected with one end of the selector switch S1, a second connection point is arranged between the grounding end GND1 and the selector switch S1, and the second connection point is connected with one end of the selector switch S3;

an input end VIN2 of the second input is connected with the other end of the change-over switch S2, a third connection point is arranged between the input end VIN2 and the change-over switch S2, and the third connection point is connected with the other end of the change-over switch S3;

the grounding end GND2 of the second input is connected with the other end of the switch S1, a fourth connection point is arranged between the grounding end GND2 and the switch S1, and the fourth connection point is connected with the grounding end GND of the output terminal.

In the circuit, a first filtering module is connected between the input end VIN1 of the first input and a ground end GND 1;

a second filtering module is connected between the input end VIN2 of the second input and a ground end GND 2;

and a third filtering module is connected between the output end VO of the output terminal and the ground end GND.

In the circuit, the first filtering module includes a capacitor C1, one end of the capacitor C1 is connected to the first connection point, and the other end is connected to the second connection point;

the second filtering module comprises a capacitor C2, one end of the capacitor C2 is connected with the third connection point, and the other end of the capacitor C2 is connected with the fourth connection point;

the third filtering module comprises a capacitor C3, one end of the capacitor C3 is connected with the first connecting point, and the other end of the capacitor C3 is connected with the fourth connecting point.

The utility model has the advantages that: the first input and the second input are two independent power supplies, the voltage and the current of the two independent power supplies can be changed, the output voltage and the current can be adjusted in a large range by adjusting and controlling the voltage and the current of the first input and the second input and switching the on-off state of the module, so that the circuit can be suitable for different output voltage and current occasions, the cost and the failure rate of the parallel power supplies are reduced, and the utilization efficiency of the power supplies is high.

Drawings

Fig. 1 is a schematic circuit diagram of a parallel power supply wide voltage output circuit of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the connection/connection relations referred to in the patent do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection auxiliary components according to specific implementation conditions. The utility model discloses each technical feature in the creation can the interactive combination under the prerequisite that does not contradict conflict each other.

Referring to fig. 1, a parallel power supply wide voltage output circuit includes a first input 10, a second input 20, a switching module 30 and an output terminal 40, where the switching module 30 includes a switch S1, a switch S2 and a switch S3, an input end VIN1 of the first input 10 is connected to one end of the switch S2, a first connection point 50 is disposed between the input end VIN1 and the switch S2, and the first connection point 50 is connected to an output end VO of the output terminal 40; a ground end GND1 of the first input 10 is connected with one end of a switch S1, a second connection point 60 is arranged between the ground end GND1 and the switch S1, and the second connection point 60 is connected with one end of a switch S3; an input end VIN2 of the second input 20 is connected to the other end of the switch S2, a third connection point 70 is provided between the input end VIN2 and the switch S2, and the third connection point 70 is connected to the other end of the switch S3; a ground terminal GND2 of the second input 20 is connected to the other end of the switch S1, a fourth connection point 80 is provided between the ground terminal GND2 and the switch S1, and the fourth connection point 80 is connected to the ground terminal GND of the output terminal 40. Further, a first filtering module 90 is connected between the input end VIN1 of the first input 10 and the ground end GND1, the first filtering module 90 includes a capacitor C1, one end of the capacitor C1 is connected to the first connection point 50, and the other end is connected to the second connection point 60; a second filtering module 100 is connected between the input end VIN2 of the second input 20 and a ground end GND2, the second filtering module 100 includes a capacitor C2, one end of the capacitor C2 is connected to the third connection point 70, and the other end is connected to the fourth connection point 80; a third filtering module 110 is connected between the output end VO of the output terminal 40 and the ground end GND, the third filtering module 110 includes a capacitor C3, one end of the capacitor C3 is connected to the first connection point 50, the other end of the capacitor C3 is connected to the fourth connection point 80, and the capacitor C1, the capacitor C2 and the capacitor C3 perform a filtering function.

When the first input 10 and the second input 20 output high-voltage small current, the change-over switch S1, the change-over switch S2 and the change-over switch S3 are switched, so that the change-over switch S1 and the change-over switch S2 are disconnected, and the change-over switch S3 is closed; at this time, the target voltage output from the output terminal 40 is equal to the first output voltage and the second output voltage inside the circuit after the series connection. For example, if the voltage of the first output voltage in the circuit is V1 and the voltage of the second output voltage in the circuit is V2, the target voltage VO = V1+ V2 output by the final output terminal 40 is higher than the first output voltage and the second output voltage in the circuit, that is, the voltages of the first input 10 and the second input 20;

when the first input 10 and the second input 20 output low-voltage large-current output, the change-over switch S1, the change-over switch S2 and the change-over switch S3 are switched, so that the change-over switch S1 and the change-over switch S2 are attracted, and the change-over switch S3 is disconnected; at this time, the target voltage output from the output terminal 40 is equal to the first output voltage and the second output voltage inside the parallel circuit. For example, the voltage of the first output voltage inside the circuit is V1, and the current is I1; when the voltage of the second output voltage inside the circuit is V2 and the current is I2, the final output terminal 40 outputs the target voltage VO = V1= V2 and the current is IO = I1+ I2, and the output IO current is larger than the current of either of the first input and the second input inside the circuit.

The utility model discloses a wide voltage output circuit of parallel power supply, first input and second input are two independent powers, and its voltage and electric current can change, the voltage electric current through the first input of adjustment control and second input to and the break-make state of switching module, realized that output voltage electric current is adjustable on a large scale, make this circuit can be suitable for different output voltage electric current occasions, reduce parallel power supply's cost and fault rate, and the power utilization efficiency is high.

While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.

Claims (3)

1. A wide voltage output circuit of parallel power supply is characterized in that: comprising a first input, a second input, a switching module and an output terminal,

the first input and the second input are connected with the switching module and output a first output voltage and a second output voltage to the switching module;

the switching module is connected with the output terminal and is used for switching the first output voltage and the second output voltage into series connection or parallel connection and then outputting a target voltage through the output terminal;

the switching module comprises a switch S1, a switch S2 and a switch S3,

an input end VIN1 of the first input is connected with one end of a change-over switch S2, a first connecting point is arranged between the input end VIN1 and the change-over switch S2, and the first connecting point is connected with an output end VO of the output terminal;

the grounding end GND1 of the first input is connected with one end of the selector switch S1, a second connection point is arranged between the grounding end GND1 and the selector switch S1, and the second connection point is connected with one end of the selector switch S3;

an input end VIN2 of the second input is connected with the other end of the change-over switch S2, a third connection point is arranged between the input end VIN2 and the change-over switch S2, and the third connection point is connected with the other end of the change-over switch S3;

the ground terminal GND2 of the second input is connected with the other end of the switch S1, and a fourth connection point is arranged between the ground terminal GND2 and the switch S1 and connected with the ground terminal GND of the output terminal.

2. A parallel power wide voltage output circuit as claimed in claim 1, wherein: a first filtering module is connected between the input end VIN1 of the first input and a ground end GND 1;

a second filtering module is connected between the input end VIN2 of the second input and a ground end GND 2;

and a third filtering module is connected between the output end VO of the output terminal and the ground end GND.

3. A parallel power wide voltage output circuit as claimed in claim 2, wherein: the first filtering module comprises a capacitor C1, one end of the capacitor C1 is connected with the first connecting point, and the other end of the capacitor C1 is connected with the second connecting point;

the second filtering module comprises a capacitor C2, one end of the capacitor C2 is connected with the third connection point, and the other end of the capacitor C2 is connected with the fourth connection point;

the third filtering module comprises a capacitor C3, one end of the capacitor C3 is connected with the first connecting point, and the other end of the capacitor C3 is connected with the fourth connecting point.

Images