CN202488366U

CN202488366U - Energy-saving ultra-miniature switching power supply for plug sockets with electronic circuits

Info

Publication number: CN202488366U
Application number: CN201220142854XU
Authority: CN
Inventors: 陈景正; 郑乐辉
Original assignee: ZHEJIANG LUMEISI ELECTRIC CO Ltd
Current assignee: ZHEJIANG LUMEISI ELECTRIC CO Ltd
Priority date: 2012-03-31
Filing date: 2012-03-31
Publication date: 2012-10-10
Anticipated expiration: 2022-03-31

Abstract

The utility model relates to an energy-saving ultra-small switch power supply for a plug and socket with an electronic circuit. The energy-saving ultra-small switch power supply comprises a rectification circuit, a self-excited oscillation circuit, a switch circuit, a step-down circuit and a stabilized voltage filter circuit, wherein the switch circuit comprises a resistor R3, a triode Q1 and a resistor R4, a positive electrode of the rectification circuit is connected with a base electrode of the triode Q1 through the resistor R3, the positive electrode of the rectification circuit is also collected with a collector electrode of the triode Q1, a negative electrode of the rectification circuit is connected with a transmitter electrode of the triode Q1 through the resistor R4, and the triode Q1 and the resistor R4 are connected with the self-excited oscillation circuit in parallel; and the step-down circuit comprises a transformer B1, both the self-excited oscillation circuit and the collector electrode of the triode Q1 are wound on a primary winding of the transformer B1, and a secondary winding of the transformer B1 is wound with the stabilized voltage filter circuit. The special transformer is arranged inside the power supply circuit to realize the voltage reduction of the circuit, so that the power of the circuit is greatly reduced, and the purpose of energy conservation can be realized.

Description

The energy-conservation super-small size switch power supply that is used for the plugs and sockets of charged electronic circuit

Technical field

The utility model relates to a kind of switching power circuit, especially a kind of energy-conservation super-small size switch power supply that is used for the plugs and sockets of charged electronic circuit.

Background technology

Develop rapidly along with electronics industry; Modern household electrical appliances power consumption equipment uses more and more universal in family; To the protection of power consumption equipment and in the power consumption equipment use life property safety problem is just seemed more and more important; Earth leakage protective socket can play a very good protection to power consumption equipment, if Switching Power Supply designs with regard to leaking electricity socket or plug to home-use intelligent band.

The power supply of the electronic component of common electric leakage socket the inside generally adopts resistance-capacitance depressurization, and about about 1.5 watts, operating current is at 7 milliamperes greatly for power.It can only creepage protection function of single execution, and reliability is not high.If also power supply adopts single-chip microcomputer detection multi-functional control operating current minimum at this moment to need 100 milliamperes in this way; The power minimum of socket autophage leak electricity so also more than 20 watts; This is a no small spending to family, to the electric power resource greatly waste especially of society.

Summary of the invention

The purpose of the utility model is to provide a kind of energy-conservation super-small size switch power supply of the more energy-conservation plugs and sockets that is used for charged electronic circuit.

For realizing above-mentioned purpose; The utility model adopts a kind of energy-conservation super-small size switch power supply that is used for the plugs and sockets of charged electronic circuit; Comprise rectification circuit, self-maintained circuit, switching circuit, reduction voltage circuit, filter circuit of pressure-stabilizing; Said switching circuit comprises resistance R 3, triode Q1, resistance R 4, and the positive pole of rectification circuit is connected with the base stage of triode Q1 through resistance R 3, and the positive pole of rectification circuit also is connected with the collector electrode of triode Q1; The negative pole of rectification circuit is connected with the emitter of triode Q1 through resistance R 4, and triode Q1 and resistance R 4 are parallelly connected with self-maintained circuit; Said reduction voltage circuit comprises transformer B1, and the collector electrode of excited oscillation circuit and triode Q1 all is wrapped on the elementary winding of transformer B1, and the secondary winding of transformer B1 and filter circuit of pressure-stabilizing twine.

The beneficial effect of the utility model is to realize the step-down of circuit through special transformer is set in power circuit, and the power of circuit is reduced greatly, and maximum power is no more than 0.8 watt, gets into the stand-by operation power consumption and is no more than 0.4 watt, reaches purpose of energy saving.

The utility model specifically is set to the bridge rectifier D 4 and filter capacitor C4 that said rectification circuit comprises mutual parallel connection, alternating current through bridge rectifier D 4 rectifications and filter capacitor C4 filtering after to self-maintained circuit and switching circuit output DC.Adopt bridge rectifier and capacitor filtering that electric main is converted into direct current.

The utility model specifically is set to said filter circuit of pressure-stabilizing and comprises diode D2, polar capacitor C3, voltage stabilizing didoe D7; The secondary winding of transformer B1 is connected with diode D2 anode; The negative electrode of diode D2 is connected with voltage stabilizing didoe D7 respectively at polar capacitor C3, and polar capacitor C3 and voltage stabilizing didoe D7 are parallel with one another.Electric current after the transformer step-down obtains stable electric current through filter circuit of pressure-stabilizing and supplies power circuit to use.

The utility model specifically is set to Switching Power Supply and also comprises protective circuit; Protective circuit comprises diode D1, capacitor C 2, resistance R 2; The anode of diode D1 is connected with the collector electrode of triode Q1; Capacitor C 2 is parallel with one another with resistance R 2, and is connected with the negative electrode of diode D1, and protective circuit is parallelly connected with the elementary winding of transformer B1.

Description of drawings

Fig. 1 is the circuit diagram of the utility model embodiment.

Embodiment

As shown in Figure 1, the specific embodiment of the utility model is a kind of power circuit, comprises rectification circuit, self-maintained circuit, switching circuit, reduction voltage circuit, filter circuit of pressure-stabilizing and protective circuit; Rectification circuit comprises the bridge rectifier D 4 and filter capacitor C4 of mutual parallel connection; To self-maintained circuit and switching circuit output DC, self-maintained circuit comprises the capacitor C 1 and resistance R 1 of series connection after alternating current process bridge rectifier D 4 rectifications and the filter capacitor C4 filtering, and switching circuit comprises resistance R 3, triode Q1, resistance R 4; The positive pole of rectification circuit is connected with the base stage of triode Q1 through resistance R 3; The positive pole of rectification circuit also is connected with the collector electrode of triode Q1, and the negative pole of rectification circuit is connected with the emitter of triode Q1 through resistance R 4, and triode Q1 and resistance R 4 are parallelly connected with self-maintained circuit; Reduction voltage circuit comprises transformer B1; The collector electrode of excited oscillation circuit and triode Q1 all is wrapped on the elementary winding of transformer B1, and the secondary winding of transformer B1 and filter circuit of pressure-stabilizing twine, and filter circuit of pressure-stabilizing comprises diode D2, polar capacitor C3, voltage stabilizing didoe D7; The secondary winding of transformer B1 is connected with diode D2 anode; The negative electrode of diode D2 is connected with voltage stabilizing didoe D7 respectively at polar capacitor C3, and polar capacitor C3 and voltage stabilizing didoe D7 are parallel with one another, and protective circuit comprises diode D1, capacitor C 2, resistance R 2; The anode of diode D1 is connected with the collector electrode of triode Q1; Capacitor C 2 is parallel with one another with resistance R 2, and is connected with the negative electrode of diode D1, and protective circuit is parallelly connected with the elementary winding of transformer B1.

Claims

1. An energy-saving ultra-small switching power supply for plug sockets with electronic circuits, characterized in that: the switching power supply includes a rectifier circuit, a self-excited oscillation circuit, a switching circuit, a step-down circuit, a voltage stabilizing filter circuit, and the switching circuit Including resistor R3, transistor Q1, and resistor R4, the positive pole of the rectifier circuit is connected to the base of transistor Q1 through resistor R3, the positive pole of the rectifier circuit is also connected to the collector of transistor Q1, and the negative pole of the rectifier circuit is connected to the emitter of transistor Q1 through resistor R4. pole connection, triode Q1 and resistor R4 are connected in parallel with the self-excited oscillation circuit; the step-down circuit includes a transformer B1, and the collectors of the excitation oscillation circuit and the triode Q1 are all wound on the primary winding of the transformer B1, and the secondary winding of the transformer B1 is connected with The voltage regulator filter circuit is wound.

2. The energy-saving ultra-miniature switching power supply for plugs and sockets with electronic circuits according to claim 1, characterized in that: said rectifier circuit includes a bridge rectifier D4 and a filter capacitor C4 connected in parallel, and the alternating current passes through the bridge rectifier D4 rectifies and filters capacitor C4 to output direct current to the self-excited oscillation circuit and switch circuit.

3. The energy-saving ultra-small switching power supply for plugs and sockets with electronic circuits according to claim 1 or 2, characterized in that: the voltage stabilizing filter circuit includes a diode D2, a polar capacitor C3, and a voltage stabilizing diode D7, The secondary winding of the transformer B1 is connected in series with the anode of the diode D2, the cathode of the diode D2 is respectively connected to the polar capacitor C3 and the Zener diode D7, and the polar capacitor C3 and the Zener diode D7 are connected in parallel.

4. The energy-saving ultra-small switching power supply for plugs and sockets with electronic circuits according to claim 1 or 2, characterized in that: the switching power supply also includes a protection circuit, and the protection circuit includes a diode D1, a capacitor C2, a resistor R2, a diode The anode of D1 is connected to the collector of the transistor Q1, the capacitor C2 and the resistor R2 are connected in parallel to each other and connected to the cathode of the diode D1, and the protection circuit is connected in parallel to the primary winding of the transformer B1.