CN214480315U

CN214480315U - Power supply system

Info

Publication number: CN214480315U
Application number: CN202023141758.7U
Authority: CN
Inventors: 黄春波; 崔小勃; 杜兴
Original assignee: Guangdong Aibo Electric Power Design Institute Group Co ltd
Current assignee: Guangdong Aibo Electric Power Design Institute Group Co ltd
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-10-22
Anticipated expiration: 2030-12-23

Abstract

The utility model discloses a power supply system, which comprises a transformer module, a rectifier module and an adjustable power supply module, wherein the adjustable power supply module comprises an adjustable resistance unit and an adjustable power supply unit; the input end of the transformer module is connected with an alternating current power supply, the first output end of the transformer module is connected with the first input end of the rectification module, and the second output end of the transformer module is connected with the second input end of the rectification module; the output end of the rectification module is connected with the input end of the adjustable power supply unit, and the adjustable power supply unit is also connected with the adjustable resistance unit. The utility model discloses an alternating voltage obtains direct current voltage at rectifier module's first output and second output after rectifier module rectification, and this direct current voltage is used for inputing adjustable power supply unit to utilize adjustable resistance unit to adjust adjustable power supply unit's output voltage, reach the purpose of the output voltage of nimble control adjustable power supply module. The utility model discloses can wide application in power supply circuit technical field.

Description

Power supply system

Technical Field

The utility model relates to a power supply circuit technical field especially relates to a power supply system.

Background

The switching power supply is a power supply which utilizes modern power electronic technology to control the on-off time ratio of a switching tube so as to maintain stable output voltage. At present, most of switch power supply products output a fixed voltage value and a fixed current value, and generally, a switch power supply can only output a direct current voltage signal. In the measurement and debugging processes of laboratories of colleges and universities, practical training and electronic product design, different power supplies are generally needed for supplying power, so that the output voltage of the switching power supply is flexibly adjusted according to the power demand of a user, and the technical problem to be solved is urgently solved.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims to provide a: a power supply system is provided.

The utility model adopts the technical proposal that:

a power supply system comprises a transformer module, a rectifying module and an adjustable power supply module, wherein the adjustable power supply module comprises an adjustable resistance unit and an adjustable power supply unit;

the input end of the transformer module is connected with an alternating current power supply, the first output end of the transformer module is connected with the first input end of the rectification module, and the second output end of the transformer module is connected with the second input end of the rectification module;

the output end of the rectification module is connected with the input end of the adjustable power supply unit, and the adjustable power supply unit is further connected with the adjustable resistance unit.

Further, the power supply system further comprises an isolation module;

the first input end of the isolation module is connected with the first output end of the rectification module, the second input end of the isolation module is connected with the second output end of the rectification module, and the output end of the isolation module is connected with the input end of the adjustable power supply unit.

Further, the isolation module comprises a plurality of capacitors.

Further, the rectification module is a full-bridge rectification circuit.

Further, the adjustable power supply unit comprises a monolithic switching regulator with model LM2576 HV-ADJ.

Further, the adjustable power supply unit further comprises a filter circuit.

The utility model has the advantages that: after alternating current voltage output after the transformer module transforms voltage is rectified by the rectifying module, direct current voltage is obtained at the first output end and the second output end of the rectifying module and used for being input into the adjustable power supply unit, the output voltage of the adjustable power supply unit is adjusted by the adjustable resistance unit, and the purpose of flexibly controlling the output voltage of the adjustable power supply module is achieved.

Drawings

Fig. 1 is a schematic circuit diagram of a power supply system according to the present invention.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the present invention, if there is a description of directions (up, down, left, right, front and back), it is only for convenience of description of the technical solution of the present invention, and it is not intended to indicate or imply that the technical features indicated must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the utility model, the meaning of a plurality of is one or more, the meaning of a plurality of is more than two, and the meaning of more than two is understood as not including the number; the terms "above", "below", "within" and the like are understood to include the instant numbers. In the description of the present invention, if there is any description of "first" and "second" only for the purpose of distinguishing technical features, it is not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the present invention, unless otherwise explicitly defined, the terms "set", "install", "connect", and the like are to be understood in a broad sense, and for example, may be directly connected or may be indirectly connected through an intermediate medium; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be mechanically coupled, may be electrically coupled or may be capable of communicating with each other; either as communication within the two elements or as an interactive relationship of the two elements. The technical skill in the art can reasonably determine the specific meaning of the above words in the present invention by combining the specific contents of the technical solution.

The invention will be further explained and explained with reference to the drawings and the embodiments in the following description.

In order to at least partially solve one of the above problems, the present invention provides a power supply system, referring to fig. 1, the power supply system of the present application includes a transformer module 10, a rectifier module 20, and an adjustable power supply module, where the adjustable power supply module includes an adjustable resistance unit 32 and an adjustable power supply unit 31;

the input end of the transformer module 10 is connected with an alternating current power supply, the first output end of the transformer module is connected with the first input end of the rectifier module 20, and the second output end of the transformer module 10 is connected with the second input end of the rectifier module 20;

the output terminal of the rectifying module 20 is connected to the input terminal of the adjustable power supply unit 31, and the adjustable power supply unit 31 is further connected to the adjustable resistance unit 32.

Specifically, according to the present invention, the transformer module 10 (which can be implemented by using a common transformer) is used to boost or step down the input ac voltage, so as to obtain the transformed ac voltage, the transformed ac voltage is rectified by the rectifier module 20, and then dc voltages are obtained at the first output end and the second output end of the rectifier module 20, and the dc voltages are used to input the adjustable power supply unit 31, and the adjustable resistance unit 32 is used to adjust the output voltage of the adjustable power supply unit 31, so as to achieve the purpose of flexibly controlling the output voltage of the adjustable power supply module.

As further optional embodiments, a power supply system further includes an isolation module 40, and a power supply system further includes an isolation module 40;

a first input terminal of the isolation module 40 is connected to a first output terminal of the rectification module 20, a second input terminal of the isolation module 40 is connected to a second output terminal of the rectification module 20, and an output terminal of the isolation module 40 is connected to an input terminal of the adjustable power supply unit 31.

Specifically, by additionally providing the isolation module 40 between the rectifier module 20 and the adjustable power supply module, the isolation module 40 prevents the ac component and other impurity signals contained in the dc voltage output from the rectifier module 20 from entering the following circuit, thereby isolating the influence of the ac component on the system circuit.

As a further alternative embodiment, the isolation module 40 comprises several capacitors.

Specifically, referring to fig. 1, the present embodiment provides a specific implementation manner of the isolation module 40, and the isolation module 40 of the present embodiment includes a plurality of capacitors, and the plurality of capacitors not only play a role of filtering, but also have a role of storing and releasing charges to the adjustable power supply module, so as to provide an input voltage for the adjustable power supply unit 31.

As a further optional implementation, a power supply system further includes an overcurrent protection device 50, one end of the overcurrent protection device 50 is connected to the first output terminal of the transformer module 10, and the other end of the overcurrent protection device 50 is connected to the first input terminal of the rectifier module 20.

Specifically, an overcurrent protection device 50 is disposed between the transformer module 10 and the rectifier module 20 to prevent the transformer module 10 from outputting too large voltage and current to burn out other circuit modules connected to the transformer module 10. The overcurrent protection device 50 may be an electronic fuse, an air switch, a circuit breaker, or the like, and in a specific embodiment, the electronic fuse is a fuse that is also commonly referred to as a fuse, and has the characteristics of low price and high reliability, so the electronic fuse is used as the overcurrent protection device 50.

Further as an alternative embodiment, the rectification module 20 is a full bridge rectification circuit.

Specifically, the rectifier module 20 is configured to convert the input ac power into dc power, and the single-phase rectifier circuit includes a half-bridge rectifier circuit and a full-bridge rectifier circuit, both of which can rectify the ac power into dc power. The half-bridge rectifier circuit has the advantages that the circuit structure is simple, only one diode is needed for realizing single-phase supply, but the low efficiency and load capacity mean that the half-bridge rectifier circuit is not suitable for high-power application; although the circuit structure of the full-bridge rectifier circuit is slightly complex, the full-bridge rectifier circuit has higher utilization rate of energy and stronger load capacity, so the full-bridge rectifier circuit is very suitable for occasions with certain power requirements. In consideration of power utilization, the rectifier module 20 of the present application employs a full-bridge rectifier circuit.

Further as an alternative embodiment, the adjustable power supply unit 31 comprises a monolithic switching regulator IC1 of model LM2576 HV-ADJ.

Specifically, the monolithic switching regulator IC1 with the model LM2576HV-ADJ can achieve the purpose of large output voltage amplitude change or continuous adjustment only by needing few peripheral components. In this embodiment, the adjustable resistance unit 32 includes a potentiometer RW1, a voltage dividing circuit of a first resistor R1 and a second resistor R2, and the potentiometer is connected to a fourth pin (control end) of the monolithic switching regulator IC1, so as to change a voltage dividing ratio of the output voltage of the monolithic switching regulator IC1, and achieve the purpose of flexibly adjusting the amplitude of the output voltage of the adjustable power module.

Further as an alternative embodiment, the adjustable power supply unit 31 further comprises a filter circuit 310.

Specifically, the adjustable power supply unit 31 further includes a filter circuit 310, and the filter circuit 310 includes a plurality of capacitors for filtering out the impurity signals in the output voltage.

The working principle of the utility model is as follows:

after the system is powered on, the transformer module 10 steps down or steps up the input alternating voltage to obtain a proper alternating voltage, the alternating voltage is transformed and then enters the rectification module 20 for rectification, the rectification module 20 is used for processing the alternating voltage into a direct current voltage, and the isolation module 40 is used for isolating the front-stage circuit module and the rear-stage circuit module, so that the interference of a power grid to the circuit modules is isolated. The direct current voltage output by the rectifying module 20 is used as an input voltage and processed by the adjustable power supply module (including the adjustable resistance unit 32 and the adjustable power supply unit 31), so that a flexible and variable voltage value can be output, and different power consumption requirements are met.

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

1. A power supply system is characterized by comprising a transformer module, a rectifying module and an adjustable power supply module, wherein the adjustable power supply module comprises an adjustable resistance unit and an adjustable power supply unit;

2. A power supply system according to claim 1, further comprising an isolation module;

3. A power supply system according to claim 2, wherein said isolation module comprises a plurality of capacitors.

4. The power supply system according to claim 1, further comprising an overcurrent protection device, wherein one end of the overcurrent protection device is connected to the first output terminal of the transformer module, and the other end of the overcurrent protection device is connected to the first input terminal of the rectifier module.

5. The power supply system of claim 1, wherein the rectifier module is a full bridge rectifier circuit.

6. The power supply system of claim 1, wherein the adjustable power supply unit comprises a monolithic switching regulator model LM2576 HV-ADJ.

7. The power supply system of claim 1, wherein the adjustable power supply unit further comprises a filter circuit.