CN208862748U - A kind of self-oscillation isolation generating positive and negative voltage output translator - Google Patents
A kind of self-oscillation isolation generating positive and negative voltage output translator Download PDFInfo
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- CN208862748U CN208862748U CN201821745964.9U CN201821745964U CN208862748U CN 208862748 U CN208862748 U CN 208862748U CN 201821745964 U CN201821745964 U CN 201821745964U CN 208862748 U CN208862748 U CN 208862748U
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Abstract
The utility model discloses a kind of self-oscillations, and generating positive and negative voltage output translator is isolated, including self-maintained circuit, tool there are two armature winding transformer T1 and with two one-to-one switch elements of armature winding, two equal one end of armature winding are connected with power supply VCC, the other end passes sequentially through corresponding switch element, self-maintained circuit is connected with power supply VCC, self-maintained circuit drives two switch element alternate conductions to constitute push-pull switching circuit, transformer T1 has at least one secondary winding block, the output end of secondary winding block is connected separately with generating positive and negative voltage rectifying output circuit.The utility model can satisfy the output of multichannel generating positive and negative voltage and require, and have at low cost, high reliablity, stablize output, the features such as device is simple, and design of transformer is simple can be widely used for the communicating circuit that need to be isolated, On-off signal and output circuit, in analog input and analogue quantity output circuit.
Description
Technical field
The utility model relates to field of power supplies, and in particular to a kind of self-oscillation isolation generating positive and negative voltage output translator.
Background technique
Isolated power supply circuit is that module is commonly used in electronic system, in traditional scheme, mostly uses PWM controller chip
The characteristics of Switching Power Supply, this circuit is that circuit structure is more complicated, and cost is relatively high, is typically employed in powerful
In DC-DC power circuit；There are also using the band self-oscillatory scheme of transformer, traditional transformer self-oscillation scheme transformation
Device design comparison is complicated, and the device used is relatively more, and cost is also relatively high, and it is defeated to be not met by multichannel generating positive and negative voltage
Requirement out.
Utility model content
The technical problems to be solved in the utility model: in view of the above problems in the prior art, provide a kind of self-oscillation every
From generating positive and negative voltage output translator, the utility model can satisfy the output of multichannel generating positive and negative voltage and require, and have at low cost, reliability
The features such as height stablizes output, and device is simple, and design of transformer is simple, can be widely applied to the communicating circuit for needing to be isolated, opens
Pass amount is output and input in circuit, analog input and analogue quantity output circuit.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model are as follows:
A kind of self-oscillation isolation generating positive and negative voltage output translator, including there are two armature windings for self-maintained circuit, tool
Transformer T1 and circuit for power conversion, the circuit for power conversion include and two armature windings switch member correspondingly
Part, described two equal one end of armature winding are connected with power supply VCC, the other end passes sequentially through corresponding switch element, self-oscillation
Circuit is connected with power supply VCC, and the self-maintained circuit drives two switch element alternate conductions to constitute push-pull switching circuit, institute
Transformer T1 is stated at least one secondary winding block, the output end of the secondary winding block is connected separately with generating positive and negative voltage
Rectifying output circuit.
Preferably, the self-maintained circuit include resistance R1, resistance R2, resistance R3, resistance R4, capacitor C1, capacitor C2,
Capacitor C3, triode Q2 and triode Q4, the one end the resistance R1 is connected with power supply VCC, the current collection of the other end and triode Q2
Extremely it is connected, the emitter ground connection of triode Q2, the base stage of triode Q2 is connected by resistance R3 with power supply VCC, the resistance R4
One end is connected with power supply VCC, the other end is connected with the collector of triode Q4, the emitter ground connection of triode Q4, triode Q4
Base stage be connected with power supply VCC by resistance R2, capacitor C1 is arranged in parallel at the base stage of the collector of triode Q2, triode Q4
Between, capacitor C2 is arranged in parallel between the base stage of triode Q2, the base stage of triode Q4, and capacitor C3 is arranged in parallel at triode
Between the collector of Q4, the base stage of triode Q2, the collector of the triode Q2 and the control terminal of a switch element are connected,
The collector of the triode Q4 is connected with the control terminal of another switch element.
Preferably, two switch elements that the circuit for power conversion includes are triode Q3 and triode Q1, the function
Rate conversion circuit further includes resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, the current collection of the triode Q2
Pole is connected by resistance R5 with the base stage of triode Q3, and the emitter of triode Q3 is grounded by resistance R9, the base of triode Q3
Pole is grounded by resistance R6, and the collector of triode Q3 is connected with a terminal of corresponding armature winding, the triode Q4's
Collector is connected by resistance R7 with the base stage of triode Q1, and the emitter of triode Q1 is grounded by resistance R10, triode Q1
Base stage be grounded by resistance R8, the collector of triode Q1 is connected with a terminal of corresponding armature winding.
Preferably, the generating positive and negative voltage rectifying output circuit includes rectification circuit.
Preferably, the secondary winding block includes two secondary windings with common end, the rectification circuit packet
Include two bilateral diodes, positive output terminals and negative output terminals, the common end ground connection of described two secondary windings,
And the other end is respectively connected with a bilateral diode, the uniform a output end of two bilateral diodes is connected with positive output terminals,
Another output is connected with negative output terminals.
Preferably, the generating positive and negative voltage rectifying output circuit further includes filter circuit, and the filter circuit is arranged in parallel at
The output end of rectification circuit.
Preferably, the filter circuit includes the filtered electrical for being respectively grounded positive output terminals and negative output terminals
Hold.
Compared to the prior art, the utility model has an advantage that
1, the utility model includes self-maintained circuit, there are two the transformer T1 and and two primary of armature winding for tool
The one-to-one switch element of winding, two equal one end of armature winding are connected with power supply VCC, the other end passes sequentially through corresponding open
Close element, self-maintained circuit is connected with power supply VCC, two switch element alternate conductions compositions of the self-maintained circuit driving
Push-pull switching circuit, self-maintained circuit provide the driving electricity of a specific frequency high-low voltage transformation for two switch elements
Road drives two switch element alternate conductions composition push-pull switching circuits, thus secondary winding block output end formed it is defeated
Out, the utility model can satisfy the output of multichannel generating positive and negative voltage and require, and have at low cost, high reliablity, stablize output, device letter
It is single, the features such as design of transformer is simple, can be widely applied to the communicating circuit, On-off signal and the output circuit that need to be isolated,
In analog input and analogue quantity output circuit.
2, the utility model transformer T1 has at least one secondary winding block, and the output end of secondary winding block is distinguished
It is connected with generating positive and negative voltage rectifying output circuit, it is multiple that secondary winding block can according to need arrangement, and can be according to winding wire
It encloses quantity and adjusts output voltage rank, meet the requirement of multiple-channel output, different voltages output.
Detailed description of the invention
Fig. 1 is the electrical block diagram of the utility model embodiment.
Specific embodiment
As shown in Figure 1, the self-oscillation isolation generating positive and negative voltage output translator of the present embodiment includes self-maintained circuit, tool
There are two the transformer T1 and circuit for power conversion of armature winding, circuit for power conversion includes and two armature windings one are a pair of
The switch element answered, two equal one end of armature winding are connected with power supply VCC, the other end passes sequentially through corresponding switch element, certainly
Excited oscillation circuit is connected with power supply VCC, and self-maintained circuit drives two switch element alternate conductions to constitute push-pull switching circuit,
It can be formed and be exported in the output end of secondary winding block by the push-pull switching circuit, the utility model can satisfy multichannel just
The features such as negative voltage output requires, and has at low cost, high reliablity, stablizes output, and device is simple, and design of transformer is simple, can
It is widely used in the communicating circuit for needing to be isolated, On-off signal and output circuit, analog input and analogue quantity output circuit
In.In the present embodiment, there are two secondary winding blocks for transformer T1 tool, and the output end of secondary winding block is connected separately with positive and negative
Voltage commutation output circuit.In addition, the secondary winding block quantity of transformer T1 also can according to need and be adjusted, such as adopt
With one or more.
As shown in Figure 1, self-maintained circuit include resistance R1, resistance R2, resistance R3, resistance R4, capacitor C1, capacitor C2,
Capacitor C3, triode Q2 and triode Q4, the one end resistance R1 is connected with power supply VCC, the collector phase of the other end and triode Q2
Even, the emitter ground connection of triode Q2, the base stage of triode Q2 are connected by resistance R3 with power supply VCC, the one end resistance R4 and electricity
Source VCC is connected, the other end is connected with the collector of triode Q4, the emitter ground connection of triode Q4, and the base stage of triode Q4 is logical
It crosses resistance R2 to be connected with power supply VCC, capacitor C1 is arranged in parallel between the base stage of the collector of triode Q2, triode Q4, electricity
Hold C2 to be arranged in parallel between the base stage of triode Q2, the base stage of triode Q4, capacitor C3 is arranged in parallel at the collection of triode Q4
Electrode, triode Q2 base stage between, the control terminal of the collector of triode Q2 and a switch element is connected, triode Q4's
Collector is connected with the control terminal of another switch element.Above structure can be realized the self-oscillation of self-maintained circuit, from
The frequency of oscillation of excited oscillation circuit is related with the size of resistance R2, capacitor C1, resistance R3 and capacitor C3, resistance R1, resistance R5, electricity
Resistance R6, resistance R4, resistance R7 and resistance R8 provide a bias voltage for triode Q1 and triode Q3, so that from exciting
It swings two switch element alternate conductions of circuit drives and constitutes push-pull switching circuit.
As shown in Figure 1, two switch elements that circuit for power conversion includes in the present embodiment are triode Q3 and triode
Q1, circuit for power conversion further include resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, the collection of triode Q2
Electrode is connected by resistance R5 with the base stage of triode Q3, and the emitter of triode Q3 is grounded by resistance R9, triode Q3's
Base stage is grounded by resistance R6, and the collector of triode Q3 is connected with a terminal of corresponding armature winding, the collection of triode Q4
Electrode is connected by resistance R7 with the base stage of triode Q1, and the emitter of triode Q1 is grounded by resistance R10, triode Q1's
Base stage is grounded by resistance R8, and the collector of triode Q1 is connected with a terminal of corresponding armature winding.Self-maintained circuit
With resistance R9(current-limiting resistance) and resistance R10(current-limiting resistance) constitute circuit for power conversion.Resistance R1, resistance R5, resistance R6, electricity
Resistance R4, resistance R7 and resistance R8 are respectively used to provide bias voltage to triode Q3 and triode Q1.Transformer in the present embodiment
Two armature windings of T1 include: the armature winding L between endpoint 1 and 21-2, armature winding L between endpoint 2 and 32-3And two
A one-to-one switch element of armature winding is that triode Q3 and triode Q1 specifically refers to triode Q1 and armature winding L1-2
It is corresponding, triode Q3 and armature winding L2-3Corresponding, in order to simplify structure in the present embodiment, two armature windings have common end
Point 2, and public point 2 connects power supply VCC, the collector and armature winding L of triode Q11-2Terminal 1 be connected, triode Q3
Collector and armature winding L2-3Terminal 3 be connected.
In the present embodiment, generating positive and negative voltage rectifying output circuit includes rectification circuit.As shown in Figure 1, secondary winding block packet
Two secondary windings with common end are included, rectification circuit includes two bilateral diodes, positive output terminals and cathode
Output terminal, the common end ground connection of two secondary windings and the other end are respectively connected with a bilateral diode, and two two-way two
The uniform a output end of pole pipe is connected with positive output terminals, another output is connected with negative output terminals.With the upper right side Fig. 1
Secondary winding block for, which includes two secondary windings with common end 9: between endpoint 8 and 9
Secondary windings L8-9, secondary windings L between endpoint 9 and 109-10.Rectification circuit include two bilateral diodes (D1 and D2),
The common end 9 of positive output terminals and negative output terminals, two secondary windings is grounded, secondary windings L8-9Another
Output end (endpoint 8) connects bilateral diode D1, and mono- output end of bilateral diode D1 is connected with positive output terminals, another
Output end is connected with negative output terminals；Secondary windings L9-10Another output (endpoint 10) connect bilateral diode D2,
Mono- output end of bilateral diode D2 is connected with positive output terminals, another output is connected with negative output terminals.
In the present embodiment, generating positive and negative voltage rectifying output circuit further includes filter circuit, and filter circuit is arranged in parallel at rectification
The output end of circuit, rectification circuit and filter circuit composition filtering energy storage output circuit.In the present embodiment, filter circuit includes point
The filter capacitor for not being grounded positive output terminals and negative output terminals.By taking the secondary winding block of the upper right side Fig. 1 as an example,
The filter circuit of the secondary winding block includes respectively by the positive output terminals VO2+ filter capacitor C4 being grounded and by cathode
The filter capacitor C5 of output terminal VO2- ground connection.
The working principle of the self-oscillation isolation generating positive and negative voltage output translator of the present embodiment is as follows: self-maintained circuit
Frequency of oscillation is related with the size of resistance R2, capacitor C1, resistance R3 and capacitor C3, resistance R1, resistance R5, resistance R6, resistance R4,
Resistance R7 and resistance R8 provides a bias voltage for triode Q1 and triode Q3, and self-maintained circuit is triode Q1 and three
Pole pipe Q3 provides the driving circuit of specific frequency high-low voltage transformation, triode Q1 and triode Q3 alternate conduction, composition
Push-pull switching circuit, turn-on time are related with self-excited oscillatory frequency.Transformer secondary output passes through bilateral diode D1, bilateral diode
D2, bilateral diode D3 and bilateral diode D4 are rectified into generating positive and negative voltage, finally by filter capacitor C4, filter capacitor C5, filter
Wave capacitor C6 and filter capacitor C7 are filtered into stable output voltage, can satisfy multichannel generating positive and negative voltage output require, have at
The features such as this low, high reliablity stablizes output, and device is simple, and design of transformer is simple, can be widely used for the communication that need to be isolated
In circuit, On-off signal and output circuit, analog input and analogue quantity output circuit.Moreover, the present embodiment from exciting
Swing that the device that utilizes of isolation generating positive and negative voltage output translator is considerably less, and circuit structure is fairly simple and cost is very low, is more suitable for
Cost is saved applied to large batch of production；It can be with suitably modified transformer winding meet demand if necessary to more multiple-channel output；
Output voltage can connect 7815,7915,7805 or 7905 voltage-stablizers and meet the needs of +/- 15V, +/- 5V different voltages, output
Flexibly, meets the needs of different.
The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited merely to
Above-described embodiment, technical solution belonging to the idea of the present invention belong to the protection scope of the utility model.It should refer to
Out, for those skilled in the art, it is without departing from the principle of the utility model it is several improvement and
Retouching, these improvements and modifications also should be regarded as the protection scope of the utility model.
Claims (7)
1. generating positive and negative voltage output translator is isolated in a kind of self-oscillation, it is characterised in that: including there are two self-maintained circuit, tools
The transformer T1 and circuit for power conversion of armature winding, the circuit for power conversion includes and two armature windings correspond
Switch element, described two equal one end of armature winding are connected with power supply VCC, the other end passes sequentially through corresponding switch element,
Self-maintained circuit is connected with power supply VCC, and the self-maintained circuit drives two switch element alternate conduction compositions to recommend out
Powered-down road, the transformer T1 have at least one secondary winding block, and the output end of the secondary winding block is separately connected
There is generating positive and negative voltage rectifying output circuit.
2. generating positive and negative voltage output translator is isolated in self-oscillation according to claim 1, it is characterised in that: described from exciting
Swinging circuit includes resistance R1, resistance R2, resistance R3, resistance R4, capacitor C1, capacitor C2, capacitor C3, triode Q2 and triode
Q4, the one end the resistance R1 is connected with power supply VCC, the other end is connected with the collector of triode Q2, the emitter of triode Q2
Ground connection, the base stage of triode Q2 are connected by resistance R3 with power supply VCC, and the one end the resistance R4 is connected with power supply VCC, the other end
It is connected with the collector of triode Q4, the emitter ground connection of triode Q4, the base stage of triode Q4 passes through resistance R2 and power supply VCC
It is connected, capacitor C1 is arranged in parallel between the base stage of the collector of triode Q2, triode Q4, and capacitor C2 is arranged in parallel at three poles
Between the base stage of pipe Q2, the base stage of triode Q4, capacitor C3 is arranged in parallel at the base stage of the collector of triode Q4, triode Q2
Between, the control terminal of the collector of the triode Q2 and a switch element is connected, the collector of the triode Q4 and another
The control terminal of one switch element is connected.
3. generating positive and negative voltage output translator is isolated in self-oscillation according to claim 2, it is characterised in that: the power turns
Changing switch element that circuit includes is triode Q3 and triode Q1, the circuit for power conversion further include resistance R5, resistance R6,
Resistance R7, resistance R8, resistance R9, resistance R10, the triode Q2 collector pass through the base stage phase of resistance R5 and triode Q3
Even, the emitter of triode Q3 is grounded by resistance R9, and the base stage of triode Q3 is grounded by resistance R6, the current collection of triode Q3
Pole is connected with a terminal of corresponding armature winding, and the collector of the triode Q4 passes through the base stage of resistance R7 and triode Q1
It is connected, the emitter of triode Q1 is grounded by resistance R10, and the base stage of triode Q1 is grounded by resistance R8, triode Q1's
Collector is connected with a terminal of corresponding armature winding.
4. generating positive and negative voltage output translator is isolated in self-oscillation according to any one of claims 1 to 3, feature exists
In: the generating positive and negative voltage rectifying output circuit includes rectification circuit.
5. generating positive and negative voltage output translator is isolated in self-oscillation according to claim 4, it is characterised in that: it is described it is secondary around
Group unit includes two secondary windings with common end, and the rectification circuit includes two bilateral diodes, anode output
Terminal and negative output terminals, described two secondary windings common end ground connection and the other end be respectively connected with one it is two-way
Diode, the uniform a output end of two bilateral diodes is connected with positive output terminals, another output and cathode output end
Son is connected.
6. generating positive and negative voltage output translator is isolated in self-oscillation according to claim 5, it is characterised in that: the positive negative electricity
Pressing rectifying output circuit further includes filter circuit, and the filter circuit is arranged in parallel at the output end of rectification circuit.
7. generating positive and negative voltage output translator is isolated in self-oscillation according to claim 6, it is characterised in that: the filtered electrical
Road includes the filter capacitor for being respectively grounded positive output terminals and negative output terminals.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821745964.9U CN208862748U (en) | 2018-10-26 | 2018-10-26 | A kind of self-oscillation isolation generating positive and negative voltage output translator |
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| CN201821745964.9U CN208862748U (en) | 2018-10-26 | 2018-10-26 | A kind of self-oscillation isolation generating positive and negative voltage output translator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601545A (en) * | 2019-09-26 | 2019-12-20 | 胡江 | Two-way or multi-way DC-DC conversion circuit based on Royer |
-
2018
- 2018-10-26 CN CN201821745964.9U patent/CN208862748U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601545A (en) * | 2019-09-26 | 2019-12-20 | 胡江 | Two-way or multi-way DC-DC conversion circuit based on Royer |
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