CN202513827U - Non-overshoot voltage-stabilizing switching power supply - Google Patents
Non-overshoot voltage-stabilizing switching power supply Download PDFInfo
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- CN202513827U CN202513827U CN2012201591448U CN201220159144U CN202513827U CN 202513827 U CN202513827 U CN 202513827U CN 2012201591448 U CN2012201591448 U CN 2012201591448U CN 201220159144 U CN201220159144 U CN 201220159144U CN 202513827 U CN202513827 U CN 202513827U
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- power supply
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- switching power
- overshoot voltage
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Abstract
The utility model relates to a switching power supply, and in particular relates to a non-overshoot voltage-stabilizing switching power supply. The non-overshoot voltage-stabilizing switching power supply comprises an isolation transformer, rectification filtering circuits, a switching and boosting power supply circuit, a PWM (pulse width modulation) control chip and a singlechip MCU (microprogrammed control unit), wherein interfaces +V and -V of the PWM control chip are connected with a DA (digital audio) output end of a front-phase rectification filtering circuit, and interfaces OUT A and OUT B of the PWM control chip are connected with interfaces INPUT A and INPUT B of the switching and boosting power supply circuit; and a data input port of the singlechip MCU is connected with a DA output end of a back-phase rectification filtering circuit through a sampling circuit, and a pulse control signal output interface of the singlechip MCU is connected with a COMP interface of the PWM control chip. The non-overshoot voltage-stabilizing switching power supply disclosed by the utility model aims at overcoming the defects that the peak interference and the resonance interference on the existing switching power supply are large enough to cause electromagnetic interference on other circumferential meters, the two rectification filtering circuits are added in the circuits to reduce harmonic components, and the PWM control chip and the singlechip MCU are added in the power supply, so that an output waveform can be more exact.
Description
Technical field:
The utility model relates to Switching Power Supply, especially a kind ofly is applied to need voltage output stable, and the non-overshoot voltage-stabilizing switch power source of industrial site such as electric current output numerical value is bigger.
Background technology:
Existing Switching Power Supply mainly exists serious switch to disturb.In the Switching Power Supply; Power adjustment switching transistor is operated on off state; Alternating voltage that it produces and electric current produce spike through other components and parts in the circuit and disturb resonant to disturb; If these interference do not take certain measure to suppress, eliminate and shield, will have a strong impact on the complete machine operate as normal.In addition, because the Switching Power Supply oscillator does not have the isolation of Industrial Frequency Transformer, these interference will seal in common frequency power network, and other electronic instruments and equipment near making receive serious interference.
The utility model content:
The utility model is in order to overcome deficiency of the prior art, to provide a kind of voltage output stable non-overshoot voltage-stabilizing switch power source.
The utility model is realized through following technical scheme for realizing above-mentioned purpose:
A kind of non-overshoot voltage-stabilizing switch power source; Comprise isolating transformer, current rectifying and wave filtering circuit, Switching Power Supply and booster power supply circuit; It also comprises pwm chip and single-chip microprocessor MCU, commutating phase filter circuit and back commutating phase filter circuit before said current rectifying and wave filtering circuit comprises; Said pwm chip+V ,-the V interface with should before the DA output of commutating phase filter circuit be connected, its OUTA, OUTB interface are connected with INPUTA, the INPUTB interface of Switching Power Supply and booster power supply circuit; The data-in port of said single-chip microprocessor MCU is connected through the DA output of sample circuit with back commutating phase filter circuit, and its pulse control signal output interface is connected with the COMP interface of pwm chip.
Further, said pwm chip is SG3525A; Said single-chip microprocessor MCU is STC89C52AD.
The circuit structure that the utility model is such; Form adjustable direct current after making three-phase alternating current through the current rectifying and wave filtering circuit rectification; Form alternating current by Switching Power Supply and booster power supply circuit after the filtering, behind the current rectifying and wave filtering circuit rectifying and wave-filtering, form direct current stably again.Through output voltage is sampled, feedback current is through the angle of flow size of amplifier control rectification thyristor, and the output dc voltage of adjustment rectification main circuit is to reach the voltage stabilizing purpose.
Compared with prior art; The beneficial effect of the utility model is: it is big to disturb resonant to disturb to existing Switching Power Supply spike; To around other instrument cause electromagnetic interference; So adopt twice rectifying and wave-filtering to reduce harmonic components in the circuit, and increased pwm chip and single-chip microprocessor MCU, can make output waveform more accurate.
Description of drawings:
Fig. 1 is the utility model structural representation.
Fig. 2 is the structural representation of pwm chip part among the utility model embodiment.
Fig. 3 is the structural representation of Switching Power Supply and booster power supply circuit among the utility model embodiment.
Embodiment:
Referring to Fig. 1; This non-overshoot voltage-stabilizing switch power source is made up of isolating transformer, preceding commutating phase filter circuit, Switching Power Supply and booster power supply circuit, back commutating phase filter circuit, pwm chip and several parts of single-chip microprocessor MCU; Said pwm chip its+V ,-the V interface is connected with the DA output of preceding commutating phase filter circuit, its OUTA, OUTB interface are connected with INPUTA, the INPUTB interface of Switching Power Supply and booster power supply circuit; The data-in port of said single-chip microprocessor MCU is connected through the DA output of sample circuit with back commutating phase filter circuit, and its pulse control signal output interface is connected with the COMP interface of pwm chip.
Before commutating phase filtering part mainly with civil power 220V at first through its RC filter circuit; Spike voltage is suppressed, and the voltage behind the High frequency filter obtains direct voltage through its rectification circuit rectification; The filter capacitor of current rectifying and wave filtering circuit back has the effect of discharging and recharging, the alternating component after the filtering rectification.The inverter voltage of partly exporting by Switching Power Supply and booster power; High-power high-frequency rectifier diode through the part of commutating phase filtering later carries out rectification; Output dc voltage after the filtering of LC filter circuit again; The sample circuit that is connected with output is sampled to output through its shunt, is sent to the control circuit that is made up of single-chip microprocessor MCU and pwm chip again and carries out regulating and controlling, to export stable voltage.
Referring to Fig. 2; Pwm chip is accepted the pulse control signal (PORT6) from single-chip microcomputer; Completion is to MOSFET pipe break-make control (OUTA; The OUTB pin), pwm chip part PWM integrated chip SG3525A controls its waveform generation principle to the MOSFET in booster power (Boost) circuit: through DA output dc voltage and inner sawtooth waveforms are relatively generated required PWM waveform.Amplitude through the control direct voltage is the duty ratio of scalable output PWM ripple, the output of control DC-DC circuit.Direct voltage is produced by Single-chip Controlling DA, and the sawtooth waveforms frequency is confirmed by chip outer meeting resistance, electric capacity.The PWM ripple that produces be HO and the output of LO two-way signal and.Control as the PWM of system ripple with HO and LO two ends and after connecing.Duty ratio is that 0-100% is adjustable.
Referring to Fig. 3, Switching Power Supply and booster power supply circuit part also possess following function, and under the situation of big electric current, easy defective chip is so need give circuit protection to the situation of big electric current.Adopt the break-make of Single-chip Controlling relay to come the electric current in the control circuit in the present embodiment, control signal is exported to relay from 112DF through photoelectrical coupler; To the output circuit current sample, sampled value and rated value compare, when electric current bears electric current greater than maximum simultaneously; Then producing signal makes single-chip microcomputer get into interrupt handling routine; Relay is started, realize the DC-DC down circuitry, thereby reach the effect of protective circuit.
Sample circuit is accomplished the sampling of output voltage and is translated into digital quantity; Export to single-chip microprocessor MCU FPDP I1.0-I1.7; After the single-chip microcomputer analysis, direct voltage is exported to PORT6 by Single-chip Controlling DA generation, relatively generate required PWM waveform with the inner sawtooth waveforms of pwm chip.
The above only is the preferred embodiment of the utility model, is not the structure of the utility model is done any pro forma restriction.Every technical spirit according to the utility model all belongs in the technical scheme scope of the utility model any simple modification, equivalent variations and modification that above embodiment did.
Claims (3)
1. non-overshoot voltage-stabilizing switch power source; Comprise isolating transformer, current rectifying and wave filtering circuit, Switching Power Supply and booster power supply circuit; It is characterized in that it also comprises pwm chip and single-chip microprocessor MCU, commutating phase filter circuit and back commutating phase filter circuit before said current rectifying and wave filtering circuit comprises; Said pwm chip+V ,-the V interface with should before the DA output of commutating phase filter circuit be connected, its OUTA, OUTB interface are connected with INPUTA, the INPUTB interface of Switching Power Supply and booster power supply circuit; The data-in port of said single-chip microprocessor MCU is connected through the DA output of sample circuit with back commutating phase filter circuit, and its pulse control signal output interface is connected with the COMP interface of pwm chip.
2. non-overshoot voltage-stabilizing switch power source according to claim 1 is characterized in that said pwm chip is SG3525A.
3. non-overshoot voltage-stabilizing switch power source according to claim 1 is characterized in that said single-chip microprocessor MCU is STC89C52AD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201591448U CN202513827U (en) | 2012-04-16 | 2012-04-16 | Non-overshoot voltage-stabilizing switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201591448U CN202513827U (en) | 2012-04-16 | 2012-04-16 | Non-overshoot voltage-stabilizing switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202513827U true CN202513827U (en) | 2012-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201591448U Expired - Fee Related CN202513827U (en) | 2012-04-16 | 2012-04-16 | Non-overshoot voltage-stabilizing switching power supply |
Country Status (1)
| Country | Link |
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| CN (1) | CN202513827U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624242A (en) * | 2012-04-16 | 2012-08-01 | 唐山电动车研发与检测有限公司 | Voltage-stabilizing switching mode power supply without overshoot |
| CN109765955A (en) * | 2018-12-07 | 2019-05-17 | 中电科仪器仪表(安徽)有限公司 | A kind of Voltage Feedback control circuit |
-
2012
- 2012-04-16 CN CN2012201591448U patent/CN202513827U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624242A (en) * | 2012-04-16 | 2012-08-01 | 唐山电动车研发与检测有限公司 | Voltage-stabilizing switching mode power supply without overshoot |
| CN109765955A (en) * | 2018-12-07 | 2019-05-17 | 中电科仪器仪表(安徽)有限公司 | A kind of Voltage Feedback control circuit |
| CN109765955B (en) * | 2018-12-07 | 2020-10-09 | 中电科仪器仪表(安徽)有限公司 | Voltage feedback control circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: TANGSHAN YKLE POWER-SUPPLY EQUIPMENT CO., LTD. Effective date: 20130110 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xiong Xisen Inventor after: Zhao Haitao Inventor after: Wang Haihe Inventor after: Zhang Biao Inventor after: Yang Hailiang Inventor after: Wang Xiaodan Inventor before: Xiong Xisen Inventor before: Zhang Biao Inventor before: Li Guohong Inventor before: Yang Hailiang Inventor before: Wang Peicuan Inventor before: Wang Xiaodan |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: XIONG XISEN ZHANG BIAO LI GUOHONG YANG HAILIANG WANG PEIXIN WANG XIAODAN TO: XIONG XISEN ZHAO HAITAO WANG HAIHE ZHANG BIAO YANG HAILIANG WANG XIAODAN |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130110 Address after: 063200 Tangshan City Hebei Caofeidian electric automobile city Patentee after: Tangshan Electric Vehicle Research & Inspection Co., Ltd. Patentee after: Tangshan excellent Collier Power Equipment Co., Ltd. Address before: 063200 Tangshan City Hebei Caofeidian electric automobile city Patentee before: Tangshan Electric Vehicle Research & Inspection Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121031 Termination date: 20140416 |