CN205647256U - Soft -starting circuit - Google Patents
Soft -starting circuit Download PDFInfo
- Publication number
- CN205647256U CN205647256U CN201620525982.0U CN201620525982U CN205647256U CN 205647256 U CN205647256 U CN 205647256U CN 201620525982 U CN201620525982 U CN 201620525982U CN 205647256 U CN205647256 U CN 205647256U
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- China
- Prior art keywords
- circuit
- resistance
- audion
- soft
- relay
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses a soft -starting circuit, include flyback converter and soft the relay circuit, PFC circuit, L LC resonant circuit and the output circuit that concatenate in proper order, flyback converter's input termination is between L LC resonant circuit and output circuit, and flyback converter's output links to each other with soft relay circuit. The utility model discloses a break -make of relay among soft the relay circuit is controlled to the DSP controller, and the DSP controller detects the direct current busbar voltage of PFC circuit, rises when enough high as PFC circuit busbar voltage, and the DSP controller sends a signal for the relay actuation, the soft starting resistance of short circuit, thus realize high power switch power safe and reliable's soft start, make the operation of circuit safety and stability, have simple structure, advantage that job stabilization is reliable.
Description
Technical field
This utility model relates to a kind of soft starting circuit.
Background technology
The input circuit i.e. pfc circuit of general Switching Power Supply mostly uses outfan to strengthen capacitor filtering, so in input
When circuit closes a floodgate, owing to the initial voltage on capacitor is zero to form the biggest temporary impact electric current (such as Fig. 1), the most greatly
Power switch power source, its input uses the filter capacitor of larger capacity, and its dash current is up to more than 100A.In power on
The dash current amplitude that moment is the biggest, frequently can lead to input fuse and blows, the most even burnt the contact of closing switch
Bad, the lighter also can make air switch close not brake application, and above-mentioned reason all can cause Switching Power Supply normally to put into.For this almost institute
Some Switching Power Supplies all can arrange the soft starting circuit preventing dash current before its input circuit, to ensure that Switching Power Supply is normal
And run reliably.
Summary of the invention
In order to solve above-mentioned technical problem, this utility model provides a kind of simple in construction, the soft starting circuit of reliable operation.
This utility model solves the technical scheme of the problems referred to above: a kind of soft starting circuit, including circuit of reversed excitation and successively
Soft relay circuit, pfc circuit, LLC resonance circuit and the output circuit of concatenation, the input of described circuit of reversed excitation is connected on
Between LLC resonance circuit and output circuit, the outfan of circuit of reversed excitation is connected with soft relay circuit.
In above-mentioned soft starting circuit, described soft relay circuit include dsp controller, two input with door, the first electric capacity,
First resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the first audion,
Two audions, relay, photo-coupler and the first diode, the input termination pfc circuit of described dsp controller, dsp controller
Output termination two input and an input of door, another input termination high level of two inputs and door, two inputs are with non-
The outfan of door connects the base stage of the second audion through the 7th resistance, and described 6th resistance is connected on base stage and the ground of the second audion
Between, the grounded emitter of the second audion, the colelctor electrode of the second audion is followed by high level through the 5th resistance, the 4th resistance, institute
Stating photo-coupler and include second diode and the 3rd audion, the anode of described second diode is connected on the 5th resistance
With the 4th between resistance, the negative electrode of the second diode and the colelctor electrode of the second audion are connected, and the colelctor electrode of the 3rd audion connects
High level, the emitter stage of the 3rd audion connects the base stage of the first audion through the 3rd resistance, and the second resistance is connected on the first audion
Base stage and ground between, the first electric capacity is attempted by the second resistance two ends, and the colelctor electrode of the first audion is after the coil of relay
Connecing high level, the negative electrode of described first diode connects the colelctor electrode of the first audion, and the anode of the first diode connects high level, institute
State the first resistance and be attempted by the normally opened contact two ends of relay, the first resistance two ends as soft relay circuit input and
Outfan.
In above-mentioned soft starting circuit, described first diode is common cathode biswitch diode.
The beneficial effects of the utility model are: this utility model controls soft relay circuit by dsp controller
The break-make of repeat circuit, the DC bus-bar voltage of dsp controller detection pfc circuit, when pfc circuit busbar voltage is raised to sufficiently high
Time, dsp controller sends a signal so that relay adhesive, short circuit soft start resistance, thus realizes high power switching power supply
Safe and reliable soft start, makes the operation that circuit safety is stable, has simple in construction, advantage stable and reliable in work.
Accompanying drawing explanation
Fig. 1 is the temporary impact current diagram produced during Switching Power Supply input circuit combined floodgate.
Fig. 2 is structured flowchart of the present utility model.
Fig. 3 is the circuit diagram of soft relay circuit in Fig. 2.
Fig. 4 is the circuit diagram of LLC resonance circuit in Fig. 2.
Fig. 5 is the circuit diagram of circuit of reversed excitation in Fig. 2.
Detailed description of the invention
With embodiment, this utility model is further described below in conjunction with the accompanying drawings.
As in figure 2 it is shown, this utility model includes circuit of reversed excitation M4, soft relay circuit, pfc circuit M1, LLC resonance electricity
Road M2 and output circuit M3, described soft relay circuit, pfc circuit M1, LLC resonance circuit M2 and output circuit M3 go here and there successively
Connecing, the input of described circuit of reversed excitation M4 is connected between LLC resonance circuit and output circuit M3, the outfan of circuit of reversed excitation M4 with
Soft relay circuit is connected.U1, V1, W1 are three-phase input, and Vout+, Vout-are respectively positive pole and the negative pole of direct current output,
From Vout+ lead-in wire and GND as the input of circuit of reversed excitation M4, by circuit of reversed excitation M4 obtain two direct current supply voltage+5V ,+
12V, powers with other pull-up circuits or biasing circuit for soft relay circuit.
As it is shown on figure 3, described soft relay circuit include dsp controller, two input with door Y, the first electric capacity C1, first
Resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, first
Audion S1, the second audion S2, relay K, photo-coupler D2 and common cathode biswitch diode D1, described dsp controller
Input termination pfc circuit, output termination two input of dsp controller and the input of door Y, two inputs are another with door Y's
One input termination high level, the outfan of two input nand gates connects the base stage of the second audion S2 through the 7th resistance R7, described
6th resistance R6 is connected between base stage and the ground of the second audion S2, the grounded emitter of the second audion S2, the second audion
The colelctor electrode of S2 is followed by high level through the 5th resistance R5, the 4th resistance R4, and described photo-coupler D2 includes second diode
With the 3rd audion, the anode of described second diode is connected between the 5th resistance R5 and the 4th resistance R4, the two or two pole
The negative electrode of pipe and the colelctor electrode of the second audion S2 are connected, and the colelctor electrode of the 3rd audion connects high level, sending out of the 3rd audion
Emitter-base bandgap grading connects the base stage of the first audion S1 through the 3rd resistance R3, and the second resistance R2 is connected on base stage and the ground of the first audion S1
Between, the first electric capacity C1 is attempted by the second resistance R2 two ends, and the colelctor electrode of the first audion S1 is followed by high electricity through the coil of relay K
Flat, the negative electrode of described common cathode biswitch diode D1 meets the colelctor electrode of the first audion S1, common cathode biswitch diode D1
Anode connect high level, described first resistance R1 is attempted by the normally opened contact two ends of relay K, and the first resistance R1 two ends are as soft
Play input and the outfan of relay circuit.
First resistance R1 forms a low pass filter as soft start resistance, the first electric capacity C1 and the 3rd resistance R3, reaches
To the purpose putting High-frequency Interference；Second resistance R2 and the 3rd resistance R3 is divider resistance, when photo-coupler D2 turns on, and+12V electricity
Pressure is added on the second resistance R2 and the 3rd resistance R3 so that the base stage input voltage of the first audion S1 is 12*R2/ (R2+R3),
6th resistance R6 and the 7th resistance R7 is divider resistance so that the base stage input voltage of the second audion S2 is AC RELAY*R6/
R6*R7, when, after the second audion S2 conducting ,+5V voltage is added on the 4th resistance R4 and the 5th resistance R5, and photo-coupler D2 is in parallel
Turned on by electric resistance partial pressure at the 5th resistance R5 two ends.Y is CMOS logic and door, when dsp controller gives a signal, logical AND
Door Y is true, exports a high level so that relay K is closed.The DC bus-bar voltage of dsp controller detection pfc circuit M1,
When pfc circuit M1 busbar voltage is raised to sufficiently high, dsp controller sends a signal so that relay K adhesive, short circuit the
One resistance R1, thus realize the soft start that high power switching power supply is safe and reliable.
Fig. 4 is the circuit diagram of LLC resonance circuit M2, and in figure, Q1, Q2, Q3, Q4 are power MOSFET, and Lr is resonant inductance,
Cr is resonant capacitance, and Lm is transformer leakage inductance, and T is transformator.
Fig. 5 is the circuit diagram of circuit of reversed excitation, and in figure, Cin is big electrochemical capacitor, and Vz is backward diode, and D41 is two
Pole is managed, and Q is power MOSFET, and T is counterattack transformator, and D42 is commutation diode, and C41 is patch capacitor, and C42, C43, C44 are
Big electrochemical capacitor, LM7812 is output+12 manostat, and LM7805 is output+5V manostat.
Claims (3)
1. a soft starting circuit, it is characterised in that: include circuit of reversed excitation and soft the relay circuit being sequentially connected in series, PFC electricity
Road, LLC resonance circuit and output circuit, the input of described circuit of reversed excitation is connected between LLC resonance circuit and output circuit, instead
The outfan of excitation circuit is connected with soft relay circuit.
Soft starting circuit the most according to claim 1, it is characterised in that: described soft relay circuit includes DSP control
Device, two input with door, the first electric capacity, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance,
7th resistance, the first audion, the second audion, relay, photo-coupler and the first diode, described dsp controller defeated
Entering and terminate pfc circuit, output termination two input of dsp controller and an input of door, another of two inputs and door is defeated
Entering to terminate high level, the outfan of two input nand gates connects the base stage of the second audion through the 7th resistance, and described 6th resistance connects
Between the base stage and ground of the second audion, the grounded emitter of the second audion, the colelctor electrode of the second audion is through the 5th electricity
Resistance, the 4th resistance are followed by high level, and described photo-coupler includes second diode and the 3rd audion, and described second
The anode of diode is connected between the 5th resistance and the 4th resistance, the negative electrode of the second diode and the colelctor electrode phase of the second audion
Even, the colelctor electrode of the 3rd audion connects high level, and the emitter stage of the 3rd audion connects the base stage of the first audion through the 3rd resistance,
Second resistance is connected between base stage and the ground of the first audion, and the first electric capacity is attempted by the second resistance two ends, the first audion
Colelctor electrode is followed by high level through the coil of relay, and the negative electrode of described first diode connects the colelctor electrode of the first audion, and first
The anode of diode connects high level, and described first resistance is attempted by the normally opened contact two ends of relay, the first resistance two ends conduct
The input of soft relay circuit and outfan.
Soft starting circuit the most according to claim 2, it is characterised in that: described first diode is common cathode biswitch two
Pole is managed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620525982.0U CN205647256U (en) | 2016-06-02 | 2016-06-02 | Soft -starting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620525982.0U CN205647256U (en) | 2016-06-02 | 2016-06-02 | Soft -starting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205647256U true CN205647256U (en) | 2016-10-12 |
Family
ID=57051856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620525982.0U Expired - Fee Related CN205647256U (en) | 2016-06-02 | 2016-06-02 | Soft -starting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205647256U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111900653A (en) * | 2020-08-06 | 2020-11-06 | 国网山东省电力公司莱芜供电公司 | Automatic ventilation and dust prevention device and method for transformer substation cable interlayer |
| CN113497551A (en) * | 2021-09-07 | 2021-10-12 | 天津海翼科技有限公司 | Direct-current power supply multi-path output protection circuit unit, protection circuit and underwater robot |
| CN113824303A (en) * | 2021-10-28 | 2021-12-21 | 中国计量大学现代科技学院 | Digital single-phase PWM rectifier starting method |
| CN115189562A (en) * | 2022-08-02 | 2022-10-14 | 山东中勤机电设备有限公司 | Power converter protection circuit, method and apparatus for cold welding machine |
| CN116865547A (en) * | 2023-09-05 | 2023-10-10 | 西安图为电气技术有限公司 | Soft start method and soft start circuit |
-
2016
- 2016-06-02 CN CN201620525982.0U patent/CN205647256U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111900653A (en) * | 2020-08-06 | 2020-11-06 | 国网山东省电力公司莱芜供电公司 | Automatic ventilation and dust prevention device and method for transformer substation cable interlayer |
| CN111900653B (en) * | 2020-08-06 | 2022-04-29 | 国网山东省电力公司莱芜供电公司 | Automatic ventilation and dust prevention device and method for transformer substation cable interlayer |
| CN113497551A (en) * | 2021-09-07 | 2021-10-12 | 天津海翼科技有限公司 | Direct-current power supply multi-path output protection circuit unit, protection circuit and underwater robot |
| CN113824303A (en) * | 2021-10-28 | 2021-12-21 | 中国计量大学现代科技学院 | Digital single-phase PWM rectifier starting method |
| CN115189562A (en) * | 2022-08-02 | 2022-10-14 | 山东中勤机电设备有限公司 | Power converter protection circuit, method and apparatus for cold welding machine |
| CN116865547A (en) * | 2023-09-05 | 2023-10-10 | 西安图为电气技术有限公司 | Soft start method and soft start circuit |
| CN116865547B (en) * | 2023-09-05 | 2023-11-14 | 西安图为电气技术有限公司 | Soft start method and soft start circuit |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161012 Termination date: 20170602 |