CN203406793U - Composite switch power supply - Google Patents

Composite switch power supply Download PDF

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Publication number
CN203406793U
CN203406793U CN201320465739.0U CN201320465739U CN203406793U CN 203406793 U CN203406793 U CN 203406793U CN 201320465739 U CN201320465739 U CN 201320465739U CN 203406793 U CN203406793 U CN 203406793U
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power supply
input
triode
full bridge
rectifying full
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CN201320465739.0U
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Chinese (zh)
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邱志锋
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Abstract

Provided is a composite switch power supply which comprises a first input end, a second input end, a first power supply conversion circuit, a second power supply conversion circuit, a switch circuit, an AC switch circuit, a power supply output end and a control signal input end. The first input end is connected with the second input end via the first power supply conversion circuit. The first power supply conversion circuit is connected with the power supply output end via the second power supply conversion circuit. The switch circuit is connected with the second input end via the second power supply conversion circuit. The first input end is connected with the AC switch circuit via the switch circuit. The first input end is connected with the power supply output end via the switch circuit and through the second power supply conversion circuit. The first power supply conversion circuit is connected with the power supply output end and the control signal input end. Two power supply conversion circuits are provided by the composite switch power supply, and power supply conversion between the two power supplies is performed by utilizing the switch circuit so that electric energy supplied to an electronic product in different working states is met and unnecessary electric energy loss is reduced.

Description

Combination switch power supply
Technical field
The utility model relates to a kind of power supply, particularly relates to a kind of combination switch power supply.
Background technology
Global civil power has different standard ，Ru China to be generally 220V, and the U.S. and Japan are all used the alternating current of 110V.Civil power is our said industrial-frequency alternating current, often uses three amounts: voltage, electric current, frequency, characterize the characteristic of alternating current.Conventionally a plurality of the not circuit modules of same-action in an electronic equipment, have been collected, and they work independently respectively sometimes, because the required operating voltage of electronic devices and components, electric current are different, the voltage that offers each functional module also has polytype, power supply changeover device can be realized the conversion of multiple voltage type, so it is widely used in household electrical appliances, PDA, measurement and control area.
Nowadays, for the convenient needs that use and promote energy-saving and emission-reduction, numerous electronic products have different operating states.As photocopier when not working in holding state, at this moment the energy of needed supply of electric power and consumption will be far below the energy consumption in when normal operation.
Yet the mode of traditional single fixed power source is under electronic product resting state, and unnecessary power consumption is larger, causes energy waste.
Utility model content
Based on this, be necessary to provide a kind of combination switch power supply that reduces energy waste.
A power supply, comprising: first input end, the second input, the first power-switching circuit, second source change-over circuit, alternating current switching circuit, power output end, control signal input, switching circuit;
Described the first power-switching circuit comprises: rectifying full bridge D2, resistance R 1 and R2, triode Q1, capacitor C 2, transformer T, and wherein transformer T comprises armature winding L1, secondary winding L3, auxiliary winding L 2;
Secondary winding L3 one end ground connection, the other end connects second source change-over circuit 104, rectifying full bridge D2 direct current positive output end is connected with the base stage of triode Q1 by resistance R 1, also by armature winding L1, be connected with the collector electrode of triode Q1, the base stage of triode Q1 is connected with one end of auxiliary winding L 2 by capacitor C 2, the other end of auxiliary winding L 2 is connected with the emitter of triode Q1 by resistance R 2, also be connected with the direct current negative output terminal of rectifying full bridge D2, one of them ac input end of rectifying full bridge D2 is connected with described first input end, another ac input end is connected with described the second input,
Described second source change-over circuit comprises: rectifying full bridge D1, diode D3 and capacitor C 1;
Rectifying full bridge D1 direct current positive output end is connected with the negative pole of diode D3, one end and the power output end of capacitor C 1, the other end ground connection of capacitor C 1.The direct current negative output terminal ground connection of rectifying full bridge D1, two ac input end connects respectively described alternating current switching circuit and described the second input, and the positive pole of diode D3 is connected with the secondary winding L3 of transformer T;
Described alternating current switching circuit comprises: relay R L1 and triode Q3;
The grounded emitter of triode Q3, the base stage of triode Q3 is connected with described control signal input, two inputs of relay R L1 are connected with described power output end with the collector electrode of triode Q3 respectively, a contact in two contacts of relay R L1 is connected with the ac input end of rectifying full bridge D1, and another contact is connected with the ac input end of rectifying full bridge D2 with described first input end simultaneously.
In one of them embodiment, described alternating current switching circuit also comprises diode D5, and the positive pole of diode D5 is connected with the collector electrode of triode Q3, and negative pole is connected with described power output end.
In one of them embodiment, described combination switch power supply also comprises bidirectional triode thyristor Q2, voltage stabilizing didoe ZD1 and ZD2, the control end of bidirectional triode thyristor Q2 is connected with the positive pole of voltage-stabiliser tube ZD1 by the negative pole of voltage-stabiliser tube ZD2, the negative pole of voltage-stabiliser tube ZD1 is connected with the second input, and the other two ends of bidirectional triode thyristor Q2 are connected with the ac input end of rectifying full bridge D1 with described the second input respectively.
Above-mentioned combination switch power supply provides two kinds of power-switching circuits, and utilizes alternating current switching circuit to carry out two kinds of power supply conversions between power supply, meets the electric power supply under electronic product different operating state, reduces unnecessary electric energy loss.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the combination switch power supply of the utility model one preferred embodiment.
Embodiment
As shown in Figure 1, it is the circuit diagram of the combination switch power supply 10 of the utility model one preferred embodiment, comprising: first input end 101, the second input 102, the first power-switching circuit 103, second source change-over circuit 104, switching circuit 105, alternating current switching circuit 106 and power output end 107, control signal input 108.
The first power-switching circuit 103 comprises: rectifying full bridge D2, resistance R 1 and R2, triode Q1, capacitor C 2, transformer T.Wherein transformer T comprises armature winding L1, secondary winding L3 and auxiliary winding L 2.
Secondary winding L3 one end ground connection, the other end connects second source change-over circuit 104.Rectifying full bridge D2 direct current positive output end is connected with the base stage of triode Q1 by resistance R 1, also by armature winding L1, is connected with the collector electrode of triode Q1.The base stage of triode Q1 is connected with one end of auxiliary winding L 2 by capacitor C 2, and the other end of auxiliary winding L 2 is connected with the emitter of triode Q1 by resistance R 2, is also connected with the direct current negative output terminal that connects rectifying full bridge D2.One of them ac input end of rectifying full bridge D2 is connected with first input end 101, and another ac output end is connected with the second input 102.
Second source change-over circuit 104 comprises: rectifying full bridge D1, diode D3 and capacitor C 1.
Rectifying full bridge D1 direct current positive output end is connected with the negative pole of diode D3, one end of capacitor C 1 and power output end 107.The other end ground connection of capacitor C 1.The direct current negative output terminal ground connection of rectifying full bridge D1, two ac input end connects respectively alternating current switching circuit 106 and the second input 102.The positive pole of diode D3 is connected with the secondary winding L3 of transformer T.
Alternating current switching circuit 106 comprises: bidirectional triode thyristor Q2, voltage stabilizing didoe ZD1 and ZD2.
The control end of bidirectional triode thyristor Q2 is connected with the positive pole of voltage-stabiliser tube ZD1 by the negative pole of voltage-stabiliser tube ZD2, and the negative pole of voltage-stabiliser tube ZD1 is connected with the second input 102.The other two ends of bidirectional triode thyristor Q2 are connected with switching circuit 105 with the second input 102 respectively.
Switching circuit 105 comprises: relay R L1, diode D5, triode Q3.
The collector electrode of triode Q3 is connected with power output end 107 by the positive pole of diode D5, the grounded emitter of triode Q3, and the base stage of triode Q3 is connected with control signal input 108.Two inputs of relay R L1 are in parallel with diode D5.One of them contact of two contacts of relay R L1 is connected with the ac output end of rectifying full bridge D1, and another contact is connected with the ac input end of rectifying full bridge D2 with first input end 101 simultaneously.
Control signal input 108 receives signal; control is as the break-make of on-off action triode Q3; thereby the open and close of control relay RL1 contact; diode D5 is connected in parallel on relay R L1 two ends; form loop checking installation; thereby prevent the self-excited pulse voltage breakdown triode Q3 that relay R L1 coil produces, protective circuit safety.
After load is connected with power output end 107, the operation principle of above-mentioned combination switch power supply 10 is as follows:
Initial condition, the moving contact of relay R L1 and fixed contact disconnect.
First input end 101 is connected after external power source with the second input 102, and alternating current, after the full-wave rectification of rectifying full bridge D2, provides a suitable positive bias to the base stage of triode Q1 by resistance R 1, makes triode Q1 conducting.The collector current of triode Q1 is by primary coil L1, negative lower positive induced voltage on its two ends produce, this induced voltage is coupled in auxiliary winding L 2 by transformer T, make L2 induce negative lower positive induced voltage, this induced voltage acts on the emitter of triode Q1 by resistance R 2, its ducting capacity is further strengthened, the collector current of triode Q1 is constantly increased.By this positive feedback process, triode Q1 enters saturation condition.The induced voltage of auxiliary winding L 2 is when providing positive feedback to triode Q1, and also, to capacitor C 2 chargings, along with increasing of capacitor C 2 charging voltages, triode Q1 base potential is step-down gradually, causes Q1 to exit saturation region.Collector current reduces gradually, from Lenz's law, in auxiliary winding L 2, induction is sent as an envoy to triode Q1 base stage for voltage negative, that transmitting is very positive, triode Q1 is ended rapidly, energy storage in primary coil L1 is by being coupled to secondary coil L3, induced voltage in L3, after the halfwave rectifier of diode D3, provides level and smooth d. c. voltage signal through the filter action of capacitor C 1 to power output end 107.
When triode Q1 ends, in auxiliary winding L 2, there is no induced voltage, direct current supply input voltage is given capacitor C 2 reverse chargings through resistance R 1 again, improve gradually auxiliary winding base potential, make its conducting again, the state that reaches capacity that again overturns, circuit repeats vibration like this and goes down.
Secondary winding L3 produces induced voltage, and diode D3 is when continuous conducting cut-off, and capacitor C 1 constantly discharges and recharges and provides energy for power output end 107 according to its state.
When load needs Switching power, in control signal input 108 input one control signals, make the effect of contact suspension control signal input 108 of relay R L1 and conducting.
Existence due to transformer T in the first power-switching circuit 103, make its input impedance very large, to the inhibition of electric current, make the electric current flowing out from first input end 101 only through relay R L1, flow to alternating current switching circuit 106 and second source change-over circuit 104.Flow to the electric current of second source change-over circuit 103 through the full-wave rectification of rectifying full bridge D1, then pass through the filter action of capacitor C 1, for power output end 107 provides level and smooth stable voltage signal, realized the switching of power supply.
Alternating current switching circuit 106 is now connected in parallel between first input end 101 and the second input 102, in alternating current, voltage rises gradually from 0V, when the input of bidirectional triode thyristor Q2 and the voltage between control end are when having voltage-stabiliser tube ZD1 and ZD2 oppositely to the puncture voltage of connection circuit, can trigger current once reach gate pole, the bidirectional triode thyristor Q2 conducting that is triggered, voltage drop when now the voltage of two of bidirectional triode thyristor Q2 inputs punctures from triggering is on state voltage, until this upper half is less than while maintaining electric current by silicon controlled electric current, bidirectional triode thyristor turn-offs at once.Adjust the scope of magnitude of voltage and can select as required different voltage-stabiliser tube ZD1 and ZD2.
Above-mentioned combination switch power supply 10 provides two kinds of power-switching circuits, and utilizes switching circuit to carry out two kinds of power supply conversions between power supply, meets the electric power supply under electronic product different operating state, reduces unnecessary electric energy loss.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.

Claims (3)

1. a combination switch power supply, is characterized in that, comprising: first input end, the second input, the first power-switching circuit, second source change-over circuit, alternating current switching circuit, power output end, control signal input,
Described the first power-switching circuit comprises: rectifying full bridge D2, resistance R 1 and R2, triode Q1, capacitor C 2, transformer T, and wherein transformer T comprises armature winding L1, secondary winding L3, auxiliary winding L 2,
Secondary winding L3 one end ground connection, the other end connects described second source change-over circuit, described rectifying full bridge D2 direct current positive output end is connected with the base stage of described triode Q1 by described resistance R 1, also by described armature winding L1, be connected with the collector electrode of described triode Q1, the base stage of described triode Q1 is connected with one end of described auxiliary winding L 2 by described capacitor C 2, the other end of described auxiliary winding L 2 is connected with the emitter of described triode Q1 by described resistance R 2, also be connected with the direct current negative output terminal of described rectifying full bridge D2, one of them ac input end of described rectifying full bridge D2 is connected with described first input end, another ac output end is connected with described the second input
Described second source change-over circuit comprises: rectifying full bridge D1, diode D3 and capacitor C 1,
Described rectifying full bridge D1 direct current positive output end is connected with the negative pole of described diode D3, one end of described capacitor C 1 and described power output end, the other end ground connection of described capacitor C 1, the direct current negative output terminal ground connection of described rectifying full bridge D1, two ac input ends of described rectifying full bridge D1 connect respectively described alternating current switching circuit and described the second input, the positive pole of described diode D3 is connected with the secondary winding L3 of described transformer T
Described alternating current switching circuit comprises: relay R L1 and triode Q3,
The grounded emitter of described triode Q3, the base stage of described triode Q3 is connected with described control signal input, two inputs of described relay R L1 are connected with described power input with the collector electrode of described triode Q3 respectively, a contact in two contacts of described relay R L1 is connected with the ac input end of described rectifying full bridge D1, and another contact is connected with the ac input end of rectifying full bridge D2 with described first input end simultaneously.
2. combination switch power supply according to claim 1, is characterized in that, described switching circuit also comprises diode D5, and the positive pole of described diode D5 is connected with the collector electrode of described triode Q3, and negative pole is connected with described power output end.
3. combination switch power supply according to claim 1, it is characterized in that, described combination switch power supply also comprises bidirectional triode thyristor Q2, voltage stabilizing didoe ZD1 and ZD2, the control end of described bidirectional triode thyristor Q2 is connected with the positive pole of described voltage-stabiliser tube ZD1 by the negative pole of described voltage-stabiliser tube ZD2, the negative pole of described voltage-stabiliser tube ZD1 is connected with described the second input, and the other two ends of described bidirectional triode thyristor Q2 are connected with the ac input end of described rectifying full bridge D1 with described the second input respectively.
CN201320465739.0U 2013-07-31 2013-07-31 Composite switch power supply Expired - Lifetime CN203406793U (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103414360A (en) * 2013-07-31 2013-11-27 邱志锋 Combination switching power supply

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103414360A (en) * 2013-07-31 2013-11-27 邱志锋 Combination switching power supply
CN103414360B (en) * 2013-07-31 2015-10-28 邱志锋 Combination switch power supply

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140122

Termination date: 20140731

EXPY Termination of patent right or utility model
AV01 Patent right actively abandoned

Granted publication date: 20140122

Effective date of abandoning: 20151028

C25 Abandonment of patent right or utility model to avoid double patenting