CN203896207U - Series switch voltage stabilizing power supply - Google Patents
Series switch voltage stabilizing power supply Download PDFInfo
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- CN203896207U CN203896207U CN201420347015.0U CN201420347015U CN203896207U CN 203896207 U CN203896207 U CN 203896207U CN 201420347015 U CN201420347015 U CN 201420347015U CN 203896207 U CN203896207 U CN 203896207U
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- 238000001914 filtration Methods 0.000 claims description 5
- 230000003321 amplification Effects 0.000 abstract description 5
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 5
- 238000005070 sampling Methods 0.000 abstract 3
- 238000005516 engineering process Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 239000002245 particle Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
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Abstract
The utility model provides a series switch voltage stabilizing power supply which comprises a rectification filter circuit, a switch tube, a pulse width modulation circuit, a comparison and amplification circuit, a reference circuit, a diode, an inductor, and a sampling circuit. The input end of the rectification filter circuit is connected to one electrode of power frequency mains supply, and the output end of the rectification filter circuit is connected to the collector of the switch tube. The input end of the diode is connected with the other electrode of the power frequency mains supply. The emitter of the switch tube is connected to one end of the inductor and the output end of the diode. The other end of the inductor is connected with the input end of the sampling circuit. The output end of the sampling circuit is connected to the signal input end of the comparison and amplification circuit. The reference signal access end of the comparison and amplification circuit is connected to the output end of the reference circuit. The output end of the comparison and amplification circuit is connected to the input end of the pulse width modulation circuit. The output end of the pulse width modulation circuit is connected to the base electrode of the switch tube. According to the series switch voltage stabilizing power supply of the utility model, a power frequency power supply can be converted, and the voltage stabilizing power supply with small volume and weight and good stability can be obtained.
Description
Technical field
The utility model relates to field of switch power, relates in particular to a kind of tandem type switching power supply.
Background technology
Along with the develop rapidly of current power electronic technology, developing rapidly of high-power MOS Manifold technology particularly, the application of switching power supply is more extensive.This development is brought up to 150-200kHz by the operating frequency of Switching Power Supply, makes the switching loss of power supply less, and the operating efficiency of power supply can be up to 90%-95%.With high frequency transformer, replace Industrial Frequency Transformer, the volume and weight of power supply has reduction significantly; Output voltage ripple is reduced in 0.05% simultaneously, and stability can reach 0.5%-1%, and antijamming capability is strong and intelligent degree is high.Based on these good characteristics, high-power switchgear power supply is more widely used in industry and military affairs.In particle accelerator, electromagnetic emission, electromagnetic propulsion, microwave weapon isopulse power technology application, the average power of this type of power-supply device is conventionally at hundreds of kilowatt more than even several megawatts, volume and weight only has 1/tens of linear power supply, and operating efficiency is but high a lot of than linear power supply.And small-power switching power-supply is mainly used in the fields such as household electrical appliances, IT, on the electronic equipments such as computer, color television set, stored-program control exchange, video camera, Set Top Box, VCD, electronic game machine.
In view of this, the utility model proposes a kind of tandem type switching power supply, can, by the conversion of power frequency supply inlet wire, obtain the stabilized voltage power supply that volume and weight is all less and stability is good.
Utility model content
In view of this, the utility model provides a kind of tandem type switching power supply, comprise current rectifying and wave filtering circuit, switching tube, pulse width modulation circuit, compare amplifying circuit, reference circuit, diode, inductance, sample circuit, wherein, one utmost point of the input termination power frequency civil power of described current rectifying and wave filtering circuit, output is connected with the collector electrode of described switching tube, another utmost point of the input termination power frequency civil power of diode, the emitter-base bandgap grading of switching tube connects one end of inductance and the output of diode, the other end of inductance connects the input of sample circuit, the output termination of sample circuit is the signal input part of amplifying circuit relatively, the relatively output of the reference signal of amplifying circuit access termination reference circuit, the input that compares the output termination pulse width modulation circuit of amplifying circuit, pulse width modulation circuit is the base stage of output termination switching tube.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or scheme of the prior art, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of the tandem type switching power supply that Fig. 1 provides for the utility model one embodiment.
Embodiment
For making object, technical scheme and the advantage of the utility model embodiment clearer, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is carried out to clear, complete description, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belongs to the scope that the utility model is protected.
The structural representation of the tandem type switching power supply that Fig. 1 provides for the utility model one embodiment, as shown in Figure 1, the tandem type switching power supply of the present embodiment, its switching tube V1 is connected between input voltage Ui and output voltage U o, when the switching pulse signal of pulse width modulation circuit PWM output is given in the base stage of V1, V1 will be periodically in ON-OFF, replace in cut-off and saturation condition.When the performance of V1 approaches perfect switch, do not consider the switching loss of switching tube V1, when V1 conducting is saturated, the voltage between its collector and emitter reduces to zero, and input voltage Ui arrives output, i.e. Uo=Ui through V1.Otherwise, during switching tube V1 cut-off, Uo=0.Like this, by the periodic on-off of switching tube V1, at output, obtain pulse voltage, through arranging filter circuit, become level and smooth direct voltage.Because output voltage U o=Ui (t/Ts) (ON time that t is switching tube, i.e. pulse duration; Ts is the work period of switching tube, i.e. pulse period), so the tandem tap voltage stabilizing circuit of the present embodiment can recently be controlled output voltage by changing the duty of switching pulse.
Wherein, current rectifying and wave filtering circuit can utilize there is the rectifying device (as rectifier diode, thyristor) of unilateral conduction and electric capacity, the energy-storage travelling wave tube such as inductance forms, the sinusoidal ac that size, direction are all changed is transformed into the direct current of unidirectional pulsation, and the civilian wave component in the Unidirectional direct-current electricity after rectification is filtered out as far as possible, make it become level and smooth high-quality direct current.
The major function of sample circuit is to detect the variation of output voltage, the amplification of comparing with reference voltage in comparing amplifying circuit, and its output signal is controlled the width of the output pulse of pulse-width modulation circuit, reaches the object that changes switching tube ON time.
Finally it should be noted that: above embodiment only, in order to the technical solution of the utility model to be described, is not intended to limit; Although the utility model is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement, and these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (1)
1. a tandem type switching power supply, it is characterized in that, described power supply comprises current rectifying and wave filtering circuit, switching tube, pulse width modulation circuit, compare amplifying circuit, reference circuit, diode, inductance, sample circuit, wherein, one utmost point of the input termination power frequency civil power of described current rectifying and wave filtering circuit, output is connected with the collector electrode of described switching tube, another utmost point of the input termination power frequency civil power of diode, the emitter-base bandgap grading of switching tube connects one end of inductance and the output of diode, the other end of inductance connects the input of sample circuit, the output termination of sample circuit is the signal input part of amplifying circuit relatively, the relatively output of the reference signal of amplifying circuit access termination reference circuit, the input that compares the output termination pulse width modulation circuit of amplifying circuit, pulse width modulation circuit is the base stage of output termination switching tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420347015.0U CN203896207U (en) | 2014-06-21 | 2014-06-21 | Series switch voltage stabilizing power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420347015.0U CN203896207U (en) | 2014-06-21 | 2014-06-21 | Series switch voltage stabilizing power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203896207U true CN203896207U (en) | 2014-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420347015.0U Expired - Fee Related CN203896207U (en) | 2014-06-21 | 2014-06-21 | Series switch voltage stabilizing power supply |
Country Status (1)
| Country | Link |
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| CN (1) | CN203896207U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109031160A (en) * | 2018-10-08 | 2018-12-18 | 华高科技（苏州）有限公司 | A kind of ABB converter circuit plate load capacity detection method |
-
2014
- 2014-06-21 CN CN201420347015.0U patent/CN203896207U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109031160A (en) * | 2018-10-08 | 2018-12-18 | 华高科技（苏州）有限公司 | A kind of ABB converter circuit plate load capacity detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20150621 |
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| EXPY | Termination of patent right or utility model |