CN218920259U

CN218920259U - Switching power supply circuit

Info

Publication number: CN218920259U
Application number: CN202220223858.4U
Authority: CN
Inventors: 姜宗军; 阳孝发
Original assignee: Shanghai Jiangling Electromechanical Co ltd
Current assignee: Shanghai Jiangling Electromechanical Co ltd
Priority date: 2022-01-26
Filing date: 2022-01-26
Publication date: 2023-04-25
Anticipated expiration: 2032-01-26

Abstract

The application relates to switching power supply circuit relates to the technical field of power, and it includes: the power input module is connected with an alternating current power supply signal; the rectification module is in signal connection with the power input module and is used for rectifying alternating current; the filtering module comprises a plurality of filtering devices connected in parallel, and two ends of the plurality of filtering devices are respectively connected with the output end of the rectifying module in parallel and are used for filtering; the power management module is in signal connection with the filtering module and is used for controlling a power signal; the voltage regulating module is used for outputting a required voltage value with the power management module signal; and the signal output module is connected with the voltage regulating module through signals and is used for outputting direct current signals. The circuit stability control method has the effect of realizing the running state of the stable control circuit, namely effectively improving the circuit stability.

Description

Switching power supply circuit

Technical Field

The present application relates to the field of power supply technology, and in particular, to a switching power supply circuit.

Background

The switching power supply is a power supply which uses the modern power electronic technology to control the time ratio of the switching tube to be switched on and off and maintain stable output voltage.

When an ac power signal is easily connected to a switching power supply circuit, the inventor has recognized that it is necessary to provide a switching power supply circuit in which the circuit operates more stably in order to provide a more stable output voltage, because the ac power signal is continuously converted.

Disclosure of Invention

In order to improve stability of the circuit, the application provides a switching power supply circuit.

The switching power supply circuit provided by the application adopts the following technical scheme:

a switching power supply circuit comprising:

the power input module is connected with an alternating current power supply signal;

the rectification module is in signal connection with the power input module and is used for rectifying alternating current;

the filtering module comprises a plurality of filtering devices connected in parallel, and two ends of the plurality of filtering devices are respectively connected with the output end of the rectifying module in parallel and are used for filtering;

the power management module is in signal connection with the filtering module and is used for controlling a power signal;

the voltage regulating module is used for outputting a required voltage value with the power management module signal; the method comprises the steps of,

and the signal output module is connected with the voltage regulating module through signals and is used for outputting direct current signals.

Through adopting above-mentioned technical scheme, alternating current power supply signal is inserted by power supply signal module, and the circuit switches on the back, carries out the rectification through rectifier module, then carries out the filtering by filter module, through power management module automatically regulated input to voltage regulation module's signal, then carries out voltage transformation by voltage regulation module, and then exports required direct current signal through signal output module. Thereby realizing the running state of the stable control circuit, namely effectively improving the stability of the circuit.

Preferably, the filter device comprises an electrolytic capacitor C22, a twenty-fourth capacitor C24 and a thirty-fourth capacitor C30 which are connected in parallel to two output ends of the rectifying module, wherein anodes of the filter devices are connected with a positive-phase power supply end, and cathodes of the filter devices are grounded.

By adopting the technical scheme, the signal is filtered through the three capacitors, so that the stability of the circuit is further improved.

Preferably, the power management module includes:

the power manager U5 is in signal connection with the input end of the voltage regulating module and is used for automatically regulating output;

the high-voltage capacitor C21 is in signal connection with the power manager U5 and is used for absorbing capacitance; the method comprises the steps of,

and two output ends of the optical coupler U8 are respectively connected with the power manager U5 and the voltage regulating module in a signal manner, and two input ends of the optical coupler U8 are connected with a reference voltage output device U9 in a signal manner.

By adopting the technical scheme, the power manager U5 realizes automatic regulation output, the high-voltage capacitor C21 realizes the purpose of absorbing capacitance, and the optocoupler U8 is used for simulating and isolating the optocoupler.

Preferably, an ultrafast recovery diode D1 is also connected between the high-voltage capacitor C21 and the voltage regulating module.

By adopting the technical scheme, the ultrafast recovery diode D1 achieves the purpose of follow current.

Preferably, the reference voltage output unit U9 is configured as a zener diode.

By adopting the technical scheme, the purpose of controlling voltage is realized through the voltage stabilizing diode.

Preferably, the power input module includes a three-hole socket CN1 and a rocker switch DS, where the rocker switch DS is signal-connected to an output end of the three-hole socket CN and connected to an ac signal;

an output end of the three-hole socket CN and the rocker switch DS are respectively connected to two input ends of the rectifier bridge BR1 in a signal manner.

Through adopting above-mentioned technical scheme, three hole sockets CN1 are used for inserting alternating current power supply signal, like commercial power etc. when rocker switch DS is closed, the circuit switches on for the circuit begins the operation, and the staff of being convenient for controls.

Preferably, a fuse F is connected between the rocker switch DS and the rectifier bridge BR1 in a signal manner.

By adopting the technical scheme, when the current agenda in the circuit rises, the fuse F is fused, so that the circuit is disconnected, and protection is formed.

Preferably, an anti-surge lightning protection module is further connected between the fuse F and the rectifier bridge BR1 in a signal manner, and the anti-surge lightning protection module includes a plurality of capacitors, a plurality of resistors and a lightning protection diode which are connected in a signal manner.

By adopting the technical scheme, the anti-surge lightning protection module effectively reduces the probability of unstable phenomenon due to larger voltage change in the circuit.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the alternating current power supply signal is connected to the power supply signal module, the circuit is conducted and then rectified through the rectifying module, then filtered through the filtering module, the signal input to the voltage regulating module is automatically regulated through the power supply management module, then voltage conversion is carried out through the high-frequency transformer T, and then the required direct current signal is output through the signal output module. Thereby realizing the running state of the stable control circuit, namely effectively improving the stability of the circuit;

2. further, through the anti-surge lightning protection module, the probability of unstable phenomenon due to large voltage change in the circuit can be effectively reduced.

Drawings

FIG. 1 is a functional block diagram of an embodiment of the present application;

fig. 2 is a schematic circuit diagram of an embodiment of the present application.

Reference numerals: 1. a power input module; 2. an anti-surge lightning protection module; 3. a rectifying module; 4. a filtering module; 5. a power management module; 6. a pressure regulating module; 7. and a signal output module.

Detailed Description

The present application is described in further detail below in conjunction with fig. 1-2.

The embodiment of the application discloses a switching power supply circuit. Referring to fig. 1, the power supply device mainly comprises a power input module 1 for connecting an alternating current power supply signal, an anti-surge lightning protection module 2 for stabilizing a voltage signal, a rectification module 3 for rectifying the alternating current signal, a filtering module 4 for filtering a circuit signal, a power management module 5 for automatically adjusting output, a voltage regulating module 6 for outputting a required voltage signal and a signal output module 7 for outputting a signal.

In order to facilitate understanding of the above-described circuit configuration, the circuit configuration is further described below.

Referring to fig. 2, the power input module 1 includes a three-hole socket CN, a rocker switch DS and a fuse F, wherein the three-hole socket DS is connected to an ac power signal, such as an electric mains signal, and two output ends of the three-hole socket CN respectively output the ac signal, and the other output end is grounded. An output end of the three-hole socket CN is sequentially connected to the rocker switch DS and the fuse F.

When the rocker switch DS is closed, the circuit is conducted; when the current signal is abnormally increased, the fuse F blows out, so that the circuit is disconnected, and the purpose of protecting the circuit is achieved.

And an anti-surge lightning protection module 2 is further connected between the fuse F and the rectifying module 3 in a signal manner, the anti-surge lightning protection module 2 comprises a first piezoresistor RV1, a first capacitor CX1, a second capacitor CX2, a fourth capacitor C4, a second piezoresistor RV2, a third piezoresistor RV3, a common mode filter L1 and an eighth resistor R8 which are connected in parallel, and a lightning protection diode SA is connected between one ends of the second piezoresistor RV2 and the third piezoresistor RV3 and the ground in series.

The rectification module 3 includes a thermistor NTC and a rectification bridge BR1, the thermistor NTC is connected in series between an eighth resistor R8 and an input end of the rectification bridge BR1, and the other input end of the rectification bridge BR1 is connected to the eighth resistor R8 in a signal manner and outputs a rectified direct current signal.

The filtering module 4 comprises an electrolytic capacitor C22, a twenty-fourth capacitor C24 and a thirty-fourth capacitor C30 which are connected in parallel, and the filtering function is realized in sequence; meanwhile, the anodes of the three capacitors are connected with a positive-phase power supply end, 300V can be connected in the application, and the cathodes are grounded.

Further, the power management module 5 includes a power manager U5, a high voltage capacitor C21, and an optocoupler U8.

The two ends of the high-voltage capacitor C21 are respectively connected with an ultrafast recovery diode D1 and ground in a signal manner, and meanwhile, the other end of the ultrafast recovery diode D1 is connected with the positive electrode of the thirty-th capacitor C30 in a signal manner, and meanwhile, the two ends of the ultrafast recovery diode D1 are connected with the voltage regulating module 6 in parallel.

The power manager U5 is also in signal connection with the anode of the thirty-second capacitor C30 and an output end of the optocoupler U8; the other output end of the optical coupler U8 is in signal connection with the voltage regulating module 6; the two input ends of the optocoupler are in signal connection with a reference voltage output device U9, in this embodiment, the reference voltage output device U9 is configured as a zener diode TL431, and a worker can configure other types of components capable of outputting reference voltage signals according to an actual circuit.

In order to achieve better voltage signal regulation, in the embodiment of the present application, the voltage regulation module 6 is configured as a high-frequency transformer T, the primary side of the high-frequency transformer T is respectively connected with two ends of the ultrafast recovery diode D1, the other output end of the optocoupler U8, and a ground signal, and the secondary side of the high-frequency transformer T is connected with the signal output module 7.

The signal output module 7 is connected with the secondary side signal of the high-frequency transformer T and aims at outputting the direct current signal regulated by the high-frequency transformer T.

The signal output module 7 comprises a direct current bus sampling circuit, and comprises a resistor, a diode, a capacitor and the like which are connected with a forty-two resistor signal in signal connection.

The signal output module 7 further comprises a path of safety protection circuit, which comprises a diode, a resistor, a capacitor, a fuse and the like which are connected through signals, wherein the diode comprises common diodes D6 and D8, a schottky diode D7, a voltage stabilizing diode V1 and a light emitting diode POW1.

The implementation principle of the switching power supply circuit in the embodiment of the application is as follows: the alternating current power supply signal is accessed by the three-hole socket CN, after the rocker switch DS is closed, the circuit is conducted, then the alternating current power supply signal flows through the anti-surge lightning protection module 2 to stabilize the voltage signal, and then the alternating current power supply signal is rectified by the rectifier bridge BR1 and then filtered by the plurality of capacitors. The signal input to the high-frequency transformer T is automatically regulated by the power manager U5, then voltage conversion is carried out by the high-frequency transformer T, and then a required direct current signal is output by the signal output module 7. Thereby realizing the running state of the stable control circuit, namely effectively improving the stability of the circuit.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. A switching power supply circuit, comprising:

the power input module (1) is connected with an alternating current power supply signal;

the rectification module (3) is in signal connection with the power input module (1) and is used for rectifying alternating current;

the filtering module (4) comprises a plurality of parallel filtering devices, and two ends of the filtering devices are respectively connected with the output end of the rectifying module (3) in parallel and are used for filtering;

the power management module (5) is in signal connection with the filtering module (4) and is used for controlling a power signal;

the voltage regulating module (6) is in signal with the power management module (5) and is used for outputting a required voltage value; the method comprises the steps of,

and the signal output module (7) is connected with the voltage regulating module through signals and is used for outputting direct current signals.

2. The switching power supply circuit according to claim 1, wherein the filter device comprises an electrolytic capacitor C22, a twenty-fourth capacitor C24 and a thirty-fourth capacitor C30 connected in parallel to both output terminals of the rectifying module (3), and anodes of the plurality of filter devices are connected to a positive power supply terminal and cathodes thereof are grounded.

3. Switching power supply circuit according to claim 1, characterized in that the power management module (5) comprises:

the power manager U5 is in signal connection with the input end of the voltage regulating module (6) and is used for automatically regulating output;

and two output ends of the optical coupler U8 are respectively connected with the power manager U5 and the voltage regulating module (6) in a signal way, and two input ends of the optical coupler U8 are connected with a reference voltage output device U9 in a signal way.

4. A switching power supply circuit according to claim 3, characterized in that an ultrafast recovery diode D1 is also signally connected between the high voltage capacitor C21 and the voltage regulating module (6).

5. A switching power supply circuit according to claim 3, wherein the reference voltage output U9 is configured as a zener diode.

6. The switching power supply circuit according to claim 1, wherein the power input module (1) comprises a three-hole socket CN1 and a rocker switch DS, and the rocker switch DS is signal-connected to an output end of the three-hole socket CN and is connected to an ac signal;

the rectifying module (3) comprises a rectifying bridge BR1, and an output end of the three-hole socket CN and the rocker switch DS are respectively connected to two input ends of the rectifying bridge BR1 in a signal mode.

7. The switching power supply circuit according to claim 6, wherein a fuse F is signally connected between the rocker switch DS and the rectifier bridge BR 1.

8. The switching power supply circuit according to claim 7, wherein an anti-surge lightning protection module (2) is further signal-connected between the fuse F and the rectifier bridge BR1, the anti-surge lightning protection module (2) including a plurality of signal-connected capacitors, a plurality of resistors, and a lightning protection diode.