CN207925279U - A kind of high isolation electronic transformer - Google Patents

Abstract

The utility model discloses a kind of high isolation electronic transformers, its key points of the technical solution are that including insulation crust, the high frequency transforming circuit being set to inside insulation crust, high frequency transforming circuit includes：Rectifier circuit, high-frequency oscillating circuits and miniature transformer；The rectifier circuit there are external input terminals to input and be processed into direct current to obtain external ac power source inputted；High-frequency oscillating circuits connects rectifier circuit, for the direct current progress higher-order of oscillation to be converted into high-frequency alternating current；Miniature transformer is connected to high-frequency oscillating circuits, for high-frequency alternating current to be depressured, exports low-voltage AC；It is provided with safety switch on the external input terminals of the rectifier bridge.

Description

A kind of high isolation electronic transformer

Technical field

The utility model is related to electronic transformer fields, particularly, are related to a kind of high isolation electronic transformer.

Background technology

Electronic transformer has and the alternating voltage of alternating current is changed into after direct current again through semiconductor switch device and electricity Subcomponent and high frequency transformer winding constitute a kind of electronic device of high-frequency ac voltage output, and the institute in theory of electronics Inverter circuit is directly handed in a kind of friendship told about.In simple terms, it is mainly by high frequency transformer magnetic core（Iron core）With two or two Above coil composition, they do not change position mutually, from one or more electrical circuit, by AC power by electricity Magnetic induction acts on, and is transformed into alternating voltage and electric current.And in the output end of high frequency transformer, the electricity consumption to one or more Circuit supplies the high-frequency ac or direct current of different voltages grade.

Currently, electronic transformer in the market is all integrated into plug inside, plug is whole to be become with wrapped with insulation electronics Depressor and circuit board section are to form insulating electron transformer.But this insulating electron transformer is still deposited in secure context It is less reliable and stable in some security risks and performance, thus need subsequent improvement.

Utility model content

In view of this, the utility model aim is to provide a kind of high isolation electronic transformer, have higher reliability and The advantage of security protection.

In order to solve the above-mentioned technical problem, the technical solution of the utility model is：A kind of high isolation electronic transformer, including Insulation crust, the high frequency transforming circuit being set to inside insulation crust, high frequency transforming circuit include：Rectifier circuit, high frequency vibrating Swing circuit and miniature transformer；There are the rectifier circuit external input terminals to input and locate to obtain external ac power source Direct current is managed into be inputted；High-frequency oscillating circuits connects rectifier circuit, for the direct current progress higher-order of oscillation to be converted into High-frequency alternating current；Miniature transformer is connected to high-frequency oscillating circuits, for high-frequency alternating current to be depressured, exports low-voltage alternating-current Electricity；It is provided with safety switch on the external input terminals of the rectifier bridge.

Preferably, the safety switch is button.

Preferably, the safety switch is inductive switch circuit, and the inductive switch circuit includes human body sensor, isolation Circuit, internal battery and driving circuit；Human body sensor is according to human body by closely generating inductive signal；Isolation circuit connects In human body sensor, for receiving inductive signal and improving voltage class output control signal；Driving circuit is connected to isolation electricity Road, for receiving the circuit on-off for controlling signal and controlling external input terminals.

Preferably, the isolation circuit includes resistance R22, resistance R21, triode Q2 and photoelectrical coupler U1, induction Signal is input to the basis set of triode Q2, the first end and photoelectricity of the collector connection resistance R21 of triode Q2 by resistance R22 The anode of coupler U1 inputs, the cathode input of the emitter connection photoelectrical coupler U1 of triode Q2 and ground terminal, photoelectricity The other side of coupler U1 is as output.

Preferably, the driving circuit includes resistance R23, resistance R25, resistance R24, triode Q3, triode Q4, three poles Pipe Q5 and relay, the first end of the cathode end connection resistance R23 of photoelectrical coupler U1, the basis set of triode Q3, electricity Hinder the emitter of second end connecting triode Q3 of R23, the first end of resistance R25 and internal battery anode, the of resistance R25 The collector of two end connecting triode Q4, the collector of the basis set connecting triode Q3 of triode Q4, the first end of resistance R24, And the basis set of triode Q5, the coil first end of the emitter connection relay of triode Q4 and the transmitting of triode Q5 Pole, the collector of coil second end connecting triode Q5 of relay, the anode of the second end of resistance R24, photoelectrical coupler U1 The normally-closed contact of the cathode of output end and internal battery, relay is connected on external input terminals.

The utility model has the technical effect that following aspect：

1, on the basis of insulation crust is dielectrically separated from, output requirement and work in order to meet voltage can By the requirement of property, needs to carry out electric power variation to this circuit, after carrying out rectification using rectifier circuit, utilize high-frequency oscillating circuits So that electric current forms the higher-order of oscillation, reduced output voltage is then carried out by miniature transformer, to meet customer need, in addition, passing through Safety switch controls external input terminals, is capable of the electric power break-make of timely control circuit, does not have to carry out entire insulation crust Plug, directly by safety switch control electric power break-make, to improve isolation effect；

2, the reliability of safety switch is conducive to the safety operation of user, and being capable of automatic sensing control.

Description of the drawings

Fig. 1 is insulation crust structure chart in embodiment 1；

Fig. 2 is circuit diagram in embodiment.

Reference numeral：1, insulation crust；2, high frequency transforming circuit；21, rectifier circuit；22, high-frequency oscillating circuits；23、 Miniature transformer；3, inductive switch circuit；31, human body sensor；32, isolation circuit；33, internal battery；34, driving circuit.

Specific implementation mode

Below in conjunction with attached drawing, specific embodiment of the present utility model is described in further detail, so that the utility model skill Art scheme is more readily understood and grasps.

Embodiment 1：

A kind of high isolation electronic transformer is provided that people as shown in Figure 1, including insulation crust 1 on insulation crust 1 Body sensor 31, specially infrared sensor of the human body, human body can export detection signal within the scope of 1m.

In 1 inside setting high frequency transforming circuit 2 of insulation crust, as shown in Fig. 2, high frequency transforming circuit 2 includes：Rectifier bridge electricity Road 21, high-frequency oscillating circuits 22 and miniature transformer 23；Rectifier circuit 21 has external input terminals to obtain external communication Power input is simultaneously processed into direct current and is inputted；High-frequency oscillating circuits 22 connect rectifier circuit 21, for by direct current into The row higher-order of oscillation is converted into high-frequency alternating current；Miniature transformer 23 is connected to high-frequency oscillating circuits 22, is used for high-frequency alternating current It is depressured, exports low-voltage AC；It is provided with safety switch on the external input terminals of rectifier bridge.Safety switch is button.

Specifically, rectifier circuit 21 is the full bridge rectifier that diode D1-D4 is constituted.It is for external ac power source Alternating current 220V.Include resistance R2 for high-frequency oscillating circuits 22, capacitance C1, capacitance C2, capacitance C3, capacitance C4, capacitance C5, two-way Diode VD1, triode Q1 and inductance L1-L3.Wherein, first end connection rectifier circuit 21, the capacitance C2 of resistance R2 The of first end, the first end of inductance L3, the first end of capacitance C4, triode Q1 collectors, the first end of capacitance C3, inductance L1 One end, the second end of the second end connection capacitance C2 of inductance L1, the first of the second end connection bilateral diode VD1 of resistance R2 It holds, the first end of capacitance C1, the second end connection other end of rectifier circuit 21 of capacitance C1, the first end of inductance L2, three poles The emitter of pipe Q1, the first end of capacitance C5, the second end of the second end connection inductance L2 of bilateral diode VD1, triode Q1 Basis set, capacitance C3 second end, the second end and miniature transformer 23 of the second end connection capacitance C5 of capacitance C4, inductance L3 Second end connect miniature transformer 23.

The number of turns of the inductance L4 and inductance L5 of miniature transformer 23 are respectively 340T and 20T.By high-frequency oscillating circuits 22, Power conversion efficiency can be improved.

Embodiment 2：

Based on above-described embodiment, in conjunction with shown in Fig. 1 and Fig. 2, safety switch is inductive switch circuit 3, inductive switch circuit 3 Including human body sensor 31, isolation circuit 32, internal battery 33 and driving circuit 34；Human body sensor 31 is close according to human body Distance generates inductive signal；Isolation circuit 32 is connected to human body sensor 31, for receiving inductive signal and improving voltage class Output control signal；Driving circuit 34 is connected to isolation circuit 32, for receiving the line for controlling signal and controlling external input terminals Road break-make.

Preferably, isolation circuit 32 includes resistance R22, resistance R21, triode Q2 and photoelectrical coupler U1, induction letter The basis set of triode Q2, the first end and photoelectricity coupling of the collector connection resistance R21 of triode Q2 number are input to by resistance R22 The anode of clutch U1 inputs, the cathode input of the emitter connection photoelectrical coupler U1 of triode Q2 and ground terminal, photoelectricity coupling The other side of clutch U1 is as output.

Preferably, driving circuit 34 includes resistance R23, resistance R25, resistance R24, triode Q3, triode Q4, triode Q5 and relay, the first end of the cathode end connection resistance R23 of photoelectrical coupler U1, the basis set of triode Q3, resistance 33 anode of the emitter of second end connecting triode Q3 of R23, the first end of resistance R25 and internal battery, the of resistance R25 The collector of two end connecting triode Q4, the collector of the basis set connecting triode Q3 of triode Q4, the first end of resistance R24, And the basis set of triode Q5, the coil first end of the emitter connection relay of triode Q4 and the transmitting of triode Q5 Pole, the collector of coil second end connecting triode Q5 of relay, the anode of the second end of resistance R24, photoelectrical coupler U1 The normally-closed contact of the cathode of output end and internal battery 33, relay is connected on external input terminals.

When work：When human body is close to human body sensor 31, photoelectrical coupler U1 works at this time, carries out signal biography It passs, and the generation to earth-current can be effectively prevent so that signal is effectively passed to driving circuit 34, then, driving circuit 34 work, relay obtain electric, normally-closed contact K1-1 action disconnections, the effective cut-out isolation of realization.Therefore in human body close to 1M models It, can be to avoid electric shock in enclosing.

Certainly, the representative instance of above only the utility model, in addition to this, the utility model can also have other a variety of Specific implementation mode, all technical solutions formed using equivalent substitution or equivalent transformation all fall within the requires of the utility model protection Within the scope of.

Claims (5)

1. a kind of high isolation electronic transformer, including insulation crust (1) are set to the internal high frequency of insulation crust (1) and become piezoelectricity Road (2), characterized in that high frequency transforming circuit (2) includes：Rectifier circuit (21), high-frequency oscillating circuits (22) and miniature change Depressor (23)；

There are external input terminals input with to obtain external ac power source and be processed into direct current progress for the rectifier circuit (21) Input；

High-frequency oscillating circuits (22) connects rectifier circuit (21), for the direct current progress higher-order of oscillation to be converted into high-frequency ac Electricity；

Miniature transformer (23) is connected to high-frequency oscillating circuits (22), and for high-frequency alternating current to be depressured, output low pressure is handed over Galvanic electricity；

It is provided with safety switch on the external input terminals of the rectifier bridge.

2. high isolation electronic transformer as described in claim 1, characterized in that the safety switch is button.

3. high isolation electronic transformer as described in claim 1, characterized in that the safety switch is inductive switch circuit (3), the inductive switch circuit (3) includes human body sensor (31), isolation circuit (32), internal battery (33) and driving electricity Road (34)；

Human body sensor (31) is according to human body by closely generating inductive signal；

Isolation circuit (32) is connected to human body sensor (31), for receiving inductive signal and improving voltage class output control letter Number；

Driving circuit (34) is connected to isolation circuit (32), leads to for receiving control signal and controlling the circuit of external input terminals It is disconnected.

4. high isolation electronic transformer as claimed in claim 3, characterized in that the isolation circuit (32) include resistance R22, Resistance R21, triode Q2 and photoelectrical coupler U1, inductive signal are input to the basis set of triode Q2 by resistance R22, and three The anode input of the first end and photoelectrical coupler U1 of the collector connection resistance R21 of pole pipe Q2, the emitter of triode Q2 connect Cathode input and the ground terminal of photoelectrical coupler U1 are connect, the other side of photoelectrical coupler U1 is as output.

5. high isolation electronic transformer as claimed in claim 4, characterized in that the driving circuit (34) include resistance R23, Resistance R25, resistance R24, triode Q3, triode Q4, triode Q5 and relay, the cathode end of photoelectrical coupler U1 Connect the first end of resistance R23, the basis set of triode Q3, emitter, the resistance of the second end connecting triode Q3 of resistance R23 First end and internal battery (33) anode of R25, the collector of the second end connecting triode Q4 of resistance R25, triode Q4 The collector of basis set connecting triode Q3, the first end of resistance R24 and triode Q5 basis set, the transmitting of triode Q4 Pole connects the coil first end of relay and the emitter of triode Q5, the coil second end connecting triode Q5 of relay Collector, the second end of resistance R24, the anode output end of photoelectrical coupler U1 and internal battery (33) cathode, relay The normally-closed contact of device is connected on external input terminals.