CN204316323U - A kind of SS (soft start) control circuit - Google Patents
A kind of SS (soft start) control circuit Download PDFInfo
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- CN204316323U CN204316323U CN201420813797.2U CN201420813797U CN204316323U CN 204316323 U CN204316323 U CN 204316323U CN 201420813797 U CN201420813797 U CN 201420813797U CN 204316323 U CN204316323 U CN 204316323U
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- power supply
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- optocoupler
- circuit
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Abstract
The utility model discloses a kind of SS (soft start) control circuit, it is characterized in that: AC power is input to the Vin end of soft starting circuit after rectifier rectification, described Vin end is associated with resistance R2, described resistance R2 and relay K 1 often to open output in parallel, the control end of described relay K 1 accesses power supply after connecting with optocoupler N1 output, described optocoupler N1 input connects power supply, wherein optocoupler N1 input anode input is connected power supply positive pole through resistance R1 with TVS pipe V1, is connected with electric capacity C1 between the both positive and negative polarity of power supply.The utility model soft starting circuit can be single in powerful system realize soft start function, be integrated in printed circuit board by simple connection, cost be low, volume is little, circuit is simple and reliable.
Description
Technical field
The utility model relates to soft starting circuit.
Background technology
Soft starting circuit is widely used in switch power technology field, to improve the stability of Switching Power Supply, avoid Switching Power Supply startup stage due to voltage or electric current sudden change and damage Switching Power Supply.General way directly alternating current input power supplying is connected to rectifier, and connect a large energy storage or filter capacitor by a Low ESR noise filter.There is large surge current during in order to avoid being just energized, usually will provide surge control circuit.In powerful system, often form Surge suppression by a series resistance, after input capacitance is charged completely, with bidirectional three-step thyristor, SRC or relay this series resistance short circuit.But the soft starting circuit be applied at present in high-power circuit, mostly circuit structure is complicated, and volume is large, and cost of manufacture is high, can not meet the requirement of low cost product manufacturing.
Utility model content
Technical problem to be solved in the utility model realizes that a kind of structure is simple, volume is little, cost is low, and the soft starting circuit that can use in high-power system.
To achieve these goals, the technical solution adopted in the utility model is: a kind of SS (soft start) control circuit, it is characterized in that: AC power is input to the Vin end of soft starting circuit after rectifier rectification, described Vin end is in series with resistance R2, it is in parallel that described resistance R2 and relay K 1 often open output, the control end of described relay K 1 accesses power supply after connecting with optocoupler N1 output, described optocoupler N1 input connects power supply, wherein optocoupler N1 input anode input is connected power supply positive pole through resistance R1 with TVS pipe V1, electric capacity C1 is connected with between the both positive and negative polarity of power supply.
The control end of described relay K 1 is parallel with diode V2, described diode V2 place in circuit.
The utility model soft starting circuit simply can realize soft start function in powerful system, is integrated in printed circuit board by simple connection, and cost is low, volume is little, circuit is simple and reliable.
Accompanying drawing explanation
Below to the content brief description that width accompanying drawing every in the utility model specification is expressed:
Fig. 1 is SS (soft start) control circuit schematic diagram.
Embodiment
As shown in Figure 1, the AC power of equipment is input to Vin end by SS (soft start) control circuit after rectifier rectification, direct current after rectification is as power supply, this power supply is simultaneously for electric capacity C1 charges, Vin end is in series with resistance R2, resistance R2 and relay K 1 often to open output in parallel, then can often open output short-circuit resistance R2 by relay K 1, the control end of relay K 1 accesses power supply after connecting with optocoupler N1 output, general access 24V power supply, the control end of relay K 1 is parallel with diode V2, and diode V2 is to place in circuit, as protection relay K1, electric capacity C1 is connected between the both positive and negative polarity of power supply, and power supply positive pole is connected optocoupler N1 input anode through resistance R1 with TVS pipe V1, power supply negative pole directly connects optocoupler N1 input cathode.
Above-mentioned SS (soft start) control circuit operation principle is as follows: AC power is input to Vin end after rectifier rectification, firm energising input voltage vin is charged to electric capacity C1 through resistance R2, when capacitance voltage reaches the puncture voltage of TVS pipe V1, optocoupler N1 conducting, at this moment relay K 1 is by adhesive, and network DC+ is connected with network DCin, resistance R2 short circuit, input Vin charges directly to electric capacity C1, and soft start function completes.Time of soft start can be regulated by regulating resistance R2 and electric capacity C1 according to actual needs, also the TVS pipe of different puncture voltage can be selected to adapt in different Circuits System to make this SS (soft start) control circuit according to the size of different commutating voltage.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious the utility model specific implementation is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasion, all within protection range of the present utility model without to improve.
Claims (2)
1. a SS (soft start) control circuit, it is characterized in that: AC power is input to the Vin end of soft starting circuit after rectifier rectification, described Vin end is associated with resistance R2, described resistance R2 and relay K 1 often to open output in parallel, the control end of described relay K 1 accesses power supply after connecting with optocoupler N1 output, described optocoupler N1 input connects power supply, wherein optocoupler N1 input anode input is connected power supply positive pole through resistance R1 with TVS pipe V1, is connected with electric capacity C1 between the both positive and negative polarity of power supply.
2. SS (soft start) control circuit according to claim 1, is characterized in that: the control end of described relay K 1 is parallel with diode V2, described diode V2 place in circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420813797.2U CN204316323U (en) | 2014-12-19 | 2014-12-19 | A kind of SS (soft start) control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420813797.2U CN204316323U (en) | 2014-12-19 | 2014-12-19 | A kind of SS (soft start) control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204316323U true CN204316323U (en) | 2015-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420813797.2U Active CN204316323U (en) | 2014-12-19 | 2014-12-19 | A kind of SS (soft start) control circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN204316323U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105591532A (en) * | 2016-01-08 | 2016-05-18 | 成都市宏山科技有限公司 | Protection circuit of switch power supply |
| CN107168142A (en) * | 2017-07-17 | 2017-09-15 | 蔡政伟 | A kind of Sleeping capsule control system |
-
2014
- 2014-12-19 CN CN201420813797.2U patent/CN204316323U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105591532A (en) * | 2016-01-08 | 2016-05-18 | 成都市宏山科技有限公司 | Protection circuit of switch power supply |
| CN107168142A (en) * | 2017-07-17 | 2017-09-15 | 蔡政伟 | A kind of Sleeping capsule control system |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |