CN204794680U

CN204794680U - Switch power source

Info

Publication number: CN204794680U
Application number: CN201520546384.7U
Authority: CN
Inventors: 冯岩河
Original assignee: Huainan Normal University
Current assignee: Huainan Normal University
Priority date: 2015-07-23
Filing date: 2015-07-23
Publication date: 2015-11-18
Anticipated expiration: 2025-07-23

Abstract

The utility model discloses a switch power source belongs to switch power source technical field. The utility model discloses a power supply circuit and protection circuit, power supply circuit, protection circuit and consumer loop through electrical connection wire, power supply circuit includes the lightning protection circuit, the EMI circuit, a rectifying filter circuit, a high -frequency transformer, a power management chip and a photoelectric coupler, filter circuit and select switch, the protection circuit includes the executor, the current detection circui, a controller, the parameter display circuit, the executor input links to each other with select switch and controller respectively, the executor output links to each other with the current detection circuit input, the current detection circuit output links to each other with controller and consumer respectively, the parameter display circuit links to each other with the controller. The utility model discloses a switch power source can not only restrain the transient state and disturb, prevents that the transient state interference from damaging the switch power source internal circuit, can also charge for the consumer of different models, more can protect consumer safety, avoids damaging the consumer because of line fault causes arrival current to increase in the twinkling of an eye.

Description

A kind of Switching Power Supply

Technical field

The utility model relates to switch power technology field, more particularly, relates to a kind of Switching Power Supply.

Background technology

Switching Power Supply utilizes modern power electronics technology, the time ratio that control switch pipe turns on and off, and maintain a kind of power supply of regulated output voltage, Switching Power Supply is generally made up of pulse width modulation (PWM) control IC and MOSFET.Along with development and the innovation of power electronic technology, switch power technology is also constantly being innovated.At present, Switching Power Supply to be widely used nearly all electronic equipment with small-sized, light weight and high efficiency feature, is the indispensable a kind of power mode of current electronics and information industry develop rapidly.

In actual life, every equipment of power supply that needs such as the electronic equipment that we commonly use such as mobile phone, panel computer, notebook computer etc. all needs power supply, and the power supply giving power electronic equipment is at present all Switching Power Supply.Electronic equipment all has supporting charger at present, if electronic equipment is not same model, charger all can not be used with.People often can forget band charger or forget to electronic equipment charging, and this will make troubles to daily life, especially when urgently needed electronic equipment.This just needs a kind of energy to the Switching Power Supply of the equipment charge of multiple different model, even if leave behind charger so also can use this Switching Power Supply to the electronic equipment of oneself charging.

Utility model content

1. the utility model technical problem that will solve

The purpose of this utility model is to overcome deficiency of the prior art; provide a kind of Switching Power Supply; the glitch such as surge voltage, ringing voltage, sparkover that AC network occurs can not only be suppressed; prevent glitch from damaging Switching Power Supply internal circuit; can also charge to the power consumption equipment of different model; more can protect power consumption equipment safety, avoid because line fault causes input current to increase instantaneously and damage power consumption equipment, be applicable to the power consumption equipment of various different model.

2. technical scheme

For achieving the above object, the technical scheme that the utility model provides is:

A kind of Switching Power Supply of the present utility model comprises power circuit and protective circuit, 220V civil power is changed into low-tension supply and powers to power consumption equipment by described power circuit, described power circuit, protective circuit and power consumption equipment are electrically connected by wire successively, described power circuit comprises lightning protection circuit, EMI circuit, current rectifying and wave filtering circuit, high frequency transformer, filter circuit and selector switch, described 220V civil power, lightning protection circuit, EMI circuit, current rectifying and wave filtering circuit, high frequency transformer, filter circuit is connected successively with selector switch, described protective circuit comprises actuator, current detection circuit, controller, parameter display circuit, described actuator input is connected with controller with selector switch respectively, actuator output is connected with current detection circuit input, current detection circuit output is connected with power consumption equipment with controller respectively, described parameter display circuit is connected with controller.

Further improve as the utility model, described lightning protection circuit comprises resistance R1, resistance R2, silicon transition absorption diode Z1 and thermo-sensitive resistor NTC, the series circuit that described resistance R1 and resistance R2 forms is in parallel with silicon transition absorption diode Z1, and described thermo-sensitive resistor NTC is connected with resistance R2.

Further improve as the utility model, described EMI circuit forms one-level EMI filter circuit by electric capacity C1 and inductance L 1.

Further improve as the utility model, described filter circuit has three groups.

Further improve as the utility model, described actuator is field effect transistor.

3. beneficial effect

The technical scheme adopting the utility model to provide, compared with prior art, has following beneficial effect:

(1) a kind of Switching Power Supply of the present utility model, lightning protection circuit comprises resistance R1, resistance R2, silicon transition absorption diode Z1 and thermo-sensitive resistor NTC, the series circuit that resistance R1 and resistance R2 forms is in parallel with silicon transition absorption diode Z1, thermo-sensitive resistor NTC is connected with resistance R2, lightning protection circuit, for suppressing the glitch such as surge voltage, ringing voltage, sparkover that AC network occurs, prevents glitch from damaging Switching Power Supply internal circuit.

(2) a kind of Switching Power Supply of the present utility model, EMI circuit forms one-level EMI filter circuit by electric capacity C1 and inductance L 1, and EMI circuit, for the high frequency spurs in filtering electrical network and in-phase interference signal, makes out-put supply purer.

(3) a kind of Switching Power Supply of the present utility model, power circuit comprises lightning protection circuit, EMI circuit, current rectifying and wave filtering circuit, high frequency transformer, filter circuit and selector switch, 220V civil power is changed into multiple low-tension supply by power circuit, as 5V, 12V etc., the convenient power consumption equipment for different model is powered; Selector switch is used for selecting different voltage output channels to different power consumption equipments.

(4) a kind of Switching Power Supply of the present utility model, protective circuit comprises actuator, current detection circuit, controller, parameter display circuit, actuator input is connected with controller with selector switch respectively, actuator output is connected with current detection circuit input, current detection circuit output is connected with power consumption equipment with controller respectively, controller can arrange corresponding current parameters according to the power consumption equipment of the specified input current of difference, when the electric current detected exceedes the parameter of setting, controller is by the output of actuator power cutoff, avoid because line fault causes input current to increase instantaneously and damage power consumption equipment, power consumption equipment safety can be protected, be applicable to the power consumption equipment of various different model.

Accompanying drawing explanation

Fig. 1 is the structural representation of a kind of Switching Power Supply of the present utility model;

Fig. 2 is the lightning protection circuit of a kind of Switching Power Supply of the present utility model and the circuit diagram of EMI circuit.

Label declaration in schematic diagram:

1,220V civil power; 2, lightning protection circuit; 3, EMI circuit; 4, current rectifying and wave filtering circuit; 5, high frequency transformer: 6, filter circuit; 7, selector switch; 8, actuator: 9, current detection circuit; 10, controller; 11, parameter display circuit; 12, power consumption equipment; 13, power circuit; 14, protective circuit.

Embodiment

For understanding content of the present utility model further, by reference to the accompanying drawings the utility model is described in detail.

As shown in Figure 1 to Figure 2, a kind of Switching Power Supply of the present utility model comprises power circuit 13 and protective circuit 14, 220V civil power 1 is changed into low-tension supply and powers to power consumption equipment 12 by described power circuit 13, described power circuit 13, protective circuit 14 and power consumption equipment 12 are electrically connected by wire successively, described power circuit 13 comprises lightning protection circuit 2, EMI circuit 3, current rectifying and wave filtering circuit 4, high frequency transformer 5, filter circuit 6 and selector switch 7, described 220V civil power 1, lightning protection circuit 2, EMI circuit 3, current rectifying and wave filtering circuit 4, high frequency transformer 5, filter circuit 6 is connected successively with selector switch 7, 220V civil power 1 can be changed into multiple low-tension supply by power circuit 13, as 5V, 12V etc., the convenient power consumption equipment for different model is powered, selector switch 7 is for selecting different voltage output channels to different power consumption equipments, described filter circuit 6 has three groups, and have several groups through high frequency transformer 5 low-tension supply out, filter circuit 6 just has several groups, described lightning protection circuit 2 comprises resistance R1, resistance R2, silicon transition absorption diode Z1 and thermo-sensitive resistor NTC, the series circuit that described resistance R1 and resistance R2 forms is in parallel with silicon transition absorption diode Z1, described thermo-sensitive resistor NTC is connected with resistance R2, lightning protection circuit 2, for suppressing the glitch such as surge voltage, ringing voltage, sparkover that AC network occurs, prevents glitch from damaging Switching Power Supply internal circuit, described EMI circuit 3 forms one-level EMI filter circuit by electric capacity C1 and inductance L 1, and EMI circuit 3, for the high frequency spurs in filtering electrical network and in-phase interference signal, makes out-put supply purer, described protective circuit 14 comprises actuator 8, current detection circuit 9, controller 10, parameter display circuit 11, described actuator 8 input is connected with controller 10 with selector switch 7 respectively, actuator 8 output is connected with current detection circuit 9 input, described actuator 8 is field effect transistor, current detection circuit 9 output is connected with power consumption equipment 12 with controller 10 respectively, controller 10 can arrange corresponding current parameters according to the power consumption equipment 12 of the specified input current of difference, when the electric current detected exceedes the parameter of setting, controller 10 allows the output of actuator 8 power cutoff, avoid because line fault causes input current to increase instantaneously and damage power consumption equipment 12, power consumption equipment 12 safety can be protected, be applicable to the power consumption equipment 12 of various different model.

Below in conjunction with embodiment, the utility model will be further described.

Embodiment 1

During use, ensure that the circuit of the whole device of Switching Power Supply is normal.220V civil power 1 is passed into Switching Power Supply, power circuit 13 produces several low-tension supply, as 12V, 5V etc., the voltage of selector switch 7 needed for power consumption equipment 12 selects corresponding voltage output channel, power consumption equipment 12 is accessed the charging of current detection circuit 9 output.Controller 10 sets current parameters according to corresponding power consumption equipment 12 in advance, if the charging wire of power consumption equipment 12 is abnormal, current detection circuit 9 sends the abnormal current signal detected to controller 10, abnormal current exceedes the current parameters established, controller 10 controls actuator 8 power cutoff and exports, timely disconnection charging circuit, prevents power consumption equipment 12 from damaging.

Schematically above be described the utility model and execution mode thereof, this description does not have restricted, and also just one of the execution mode of the present utility model shown in accompanying drawing, actual structure is not limited thereto.So, if those of ordinary skill in the art enlightens by it, when not departing from the utility model and creating aim, without creatively designing the frame mode similar to this technical scheme and embodiment, protection range of the present utility model all should be belonged to.

Claims

1. a Switching Power Supply, comprise power circuit (13) and protective circuit (14), 220V civil power (1) is changed into low-tension supply and powers to power consumption equipment (12) by described power circuit (13), described power circuit (13), protective circuit (14) and power consumption equipment (12) are electrically connected by wire successively, it is characterized in that: described power circuit (13) comprises lightning protection circuit (2), EMI circuit (3), current rectifying and wave filtering circuit (4), high frequency transformer (5), filter circuit (6) and selector switch (7), described 220V civil power (1), lightning protection circuit (2), EMI circuit (3), current rectifying and wave filtering circuit (4), high frequency transformer (5), filter circuit (6) is connected successively with selector switch (7), described protective circuit (14) comprises actuator (8), current detection circuit (9), controller (10), parameter display circuit (11), described actuator (8) input is connected with controller (10) with selector switch (7) respectively, actuator (8) output is connected with current detection circuit (9) input, current detection circuit (9) output is connected with power consumption equipment (12) with controller (10) respectively, described parameter display circuit (11) is connected with controller (10).

2. a kind of Switching Power Supply according to claim 1, it is characterized in that: described lightning protection circuit (2) comprises resistance R1, resistance R2, silicon transition absorption diode Z1 and thermo-sensitive resistor NTC, the series circuit that described resistance R1 and resistance R2 forms is in parallel with silicon transition absorption diode Z1, and described thermo-sensitive resistor NTC is connected with resistance R2.

3. a kind of Switching Power Supply according to claim 2, is characterized in that: described EMI circuit (3) forms one-level EMI filter circuit by electric capacity C1 and inductance L 1.

4. a kind of Switching Power Supply according to claim 3, is characterized in that: described filter circuit (6) has three groups.

5. a kind of Switching Power Supply according to claim 4, is characterized in that: described actuator (8) is field effect transistor.