CN201656760U - Surge-prevention soft starting circuit - Google Patents
Surge-prevention soft starting circuit Download PDFInfo
- Publication number
- CN201656760U CN201656760U CN2010201680495U CN201020168049U CN201656760U CN 201656760 U CN201656760 U CN 201656760U CN 2010201680495 U CN2010201680495 U CN 2010201680495U CN 201020168049 U CN201020168049 U CN 201020168049U CN 201656760 U CN201656760 U CN 201656760U
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- CN
- China
- Prior art keywords
- surge
- current
- inverter
- starting circuit
- soft starting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a surge-prevention soft starting circuit, which comprises rectifier bridges, thyristors (V), a current limiting resistor (R1), an inverter, a main inverter auxiliary winding and a capacitor (C1), wherein positive electrodes of the rectifier bridges are connected with the current limiting resistor (R1) and the thyristors (V) are connected through a resistor (R2) and the inverter, negative electrodes of the rectifier bridges are connected with a driver (S1) and the capacitor (C1), and the driver (S1) is connected with the main inverter auxiliary winding. Because of the arrangement of a surge-current-prevention circuit, in the wire inlet power supply switching moment, the input voltage charges the capacitor (C1) through the rectifier bridges (D1) to (D4) and the current limiting resistor (R1), the surge current is limited, and the normal and reliable operation of the power supply is ensured.
Description
Technical field
The utility model belongs to technical field of electric appliances, relates in particular to a kind of soft starting circuit of anti-surge.
Background technology
Switching Power Supply extensively is widely used on the electrical equipment with its economic and reliable, the scope of application, but a lot of Switching Power Supplies are high power switching power supply particularly, all there is an intrinsic shortcoming: promptly close a floodgate moment at incoming power, because the initial voltage on the capacitor is zero, the capacitor charging can form very big surge current moment, and this surge current may reach 10 times～100 times of power supply static working current.At power connection moment big surge current like this, the lighter can make air switch close not brake application; Weight person tends to cause importing that fuse blows or the burning of contact of combined floodgate switch, and the rectifier bridge overcurrent damages.
Traditional inrush current method for limiting is a series connection negative temperature coefficient heat-sensitive current-limiting resistor, yet this simple method has a lot of shortcomings: the one, and the current limitation effect of resistor is influenced by environmental temperature; The 2nd, strengthened the power loss of resistor sometimes, because the power loss of resistor, reduced the conversion efficiency of Switching Power Supply.
Summary of the invention
The purpose of this utility model just provides a kind of soft starting circuit that can eliminate surge current, can guarantee the normal and reliability service of power supply, simultaneously, have simple in structure, the advantage that cost is low.
The purpose of this utility model is achieved through the following technical solutions, and this anti-surge soft starting circuit comprises rectifier bridge, thyristor (V), current-limiting resistance (R
1), the auxiliary winding of inverter, main transformer device, electric capacity (C
1), the positive pole of described rectifier bridge and current-limiting resistance (R
1), thyristor (V) is connected, thyristor (V) is by resistance (R
2), inverter links to each other the negative pole of described rectifier bridge and driver (S
1), electric capacity (C
1) link to each other described driver (S
1) link to each other with the auxiliary winding of main transformer device.
In power connection moment, input voltage is through rectifier bridge (D1～D4) and current-limiting resistance (R
1) to electric capacity (C
1) charging, limit inrush currents.As electric capacity (C
1) when being charged to about 80% rated voltage, the inverter operate as normal.Triggering signal through the auxiliary winding generation thyristor of main transformer (V) makes thyristor (V) conducting and short circuit current limitation resistance (R
1), make Switching Power Supply be in normal operating condition.
The beneficial effects of the utility model: owing to be provided with anti-surge current circuit, close a floodgate moment at incoming power, input voltage is through rectifier bridge (D1～D4) and current-limiting resistance (R
1) to electric capacity (C
1) charging, limit inrush currents has guaranteed the operation of power supply normal reliable.
Description of drawings
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing:
Fig. 1 is a circuit diagram of the present utility model;
Among the figure: 1, rectifier bridge 2, thyristor V 3, current-limiting resistance R
14, inverter 5, the auxiliary winding 6 of main transformer device, driver S
17, capacitor C
1
Embodiment
As shown in Figure 1, this anti-surge soft starting circuit comprises rectifier bridge 1, thyristor (V) 2, current-limiting resistance (R
1) 3, the auxiliary winding 5 of inverter 4, main transformer device, electric capacity (C
1) 7, the positive pole of rectifier bridge 1 and current-limiting resistance (R
1) 3, thyristor (V) 2 is connected, thyristor (V) 2 is by resistance (R
2), inverter 4 links to each other the negative pole of rectifier bridge 1 and driver (S
1) 6, electric capacity (C
1) 7 link to each other driver (S
1) 6 link to each other with the auxiliary winding 5 of main transformer device.
In power connection moment, input voltage is through rectifier bridge (D1～D4) 1 and current-limiting resistance (R
1) 3 couples of electric capacity (C
1) 7 chargings, limit inrush currents.As electric capacity (C
1) 7 when being charged to about 80% rated voltage, inverter 4 operate as normal.Triggering signal through the auxiliary winding 5 generation thyristors (V) 2 of main transformer makes thyristor (V) 2 conductings and short circuit current limitation resistance (R
1) 3, make Switching Power Supply be in normal operating condition.
Claims (1)
1. an anti-surge soft starting circuit is characterized in that this anti-surge soft starting circuit comprises rectifier bridge, thyristor (V), current-limiting resistance (R
1), the auxiliary winding of inverter, main transformer device, electric capacity (C
1), the positive pole of described rectifier bridge and current-limiting resistance (R
1), thyristor (V) is connected, thyristor (V) is by resistance (R
2), inverter links to each other the negative pole of described rectifier bridge and driver (S
1), electric capacity (C
1) link to each other described driver (S
1) link to each other with the auxiliary winding of main transformer device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201680495U CN201656760U (en) | 2010-03-22 | 2010-03-22 | Surge-prevention soft starting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201680495U CN201656760U (en) | 2010-03-22 | 2010-03-22 | Surge-prevention soft starting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201656760U true CN201656760U (en) | 2010-11-24 |
Family
ID=43121990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201680495U Expired - Fee Related CN201656760U (en) | 2010-03-22 | 2010-03-22 | Surge-prevention soft starting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201656760U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102075101A (en) * | 2011-01-18 | 2011-05-25 | 江苏省电力公司常州供电公司 | Single-phase full-control rectifier current-limiting device and work method thereof |
| CN102955550A (en) * | 2011-08-25 | 2013-03-06 | 英业达股份有限公司 | Rack-mounted server system |
| CN103166197A (en) * | 2011-12-17 | 2013-06-19 | 西安恒飞电子科技有限公司 | Input over-current protection circuit of communication power supply module |
| CN103166193A (en) * | 2011-12-17 | 2013-06-19 | 西安恒飞电子科技有限公司 | Overheat protection circuit of communication power supply module |
| CN103236782A (en) * | 2013-03-28 | 2013-08-07 | 李信 | Anti-surge soft starting circuit of switching power supply |
| CN103916031A (en) * | 2013-01-09 | 2014-07-09 | 中国长城计算机深圳股份有限公司 | Half-controlled bridge rectifier with surge suppression function |
| 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 |
| CN108199568A (en) * | 2018-01-05 | 2018-06-22 | 西安电子工程研究所 | A kind of inhibition in-rush current limiting circuit |
| CN110719041A (en) * | 2018-07-13 | 2020-01-21 | 意法半导体有限公司 | Power Conversion Circuit with Inrush Current Limiting Resistor Bypass |
| US11165243B2 (en) | 2019-04-24 | 2021-11-02 | Acer Incorporated | Power supply apparatus |
-
2010
- 2010-03-22 CN CN2010201680495U patent/CN201656760U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102075101A (en) * | 2011-01-18 | 2011-05-25 | 江苏省电力公司常州供电公司 | Single-phase full-control rectifier current-limiting device and work method thereof |
| CN102075101B (en) * | 2011-01-18 | 2013-04-03 | 江苏省电力公司常州供电公司 | Single-phase full-control rectifier current-limiting device and work method thereof |
| CN102955550A (en) * | 2011-08-25 | 2013-03-06 | 英业达股份有限公司 | Rack-mounted server system |
| CN102955550B (en) * | 2011-08-25 | 2015-09-09 | 英业达股份有限公司 | A rack server system |
| CN103166197A (en) * | 2011-12-17 | 2013-06-19 | 西安恒飞电子科技有限公司 | Input over-current protection circuit of communication power supply module |
| CN103166193A (en) * | 2011-12-17 | 2013-06-19 | 西安恒飞电子科技有限公司 | Overheat protection circuit of communication power supply module |
| CN103916031A (en) * | 2013-01-09 | 2014-07-09 | 中国长城计算机深圳股份有限公司 | Half-controlled bridge rectifier with surge suppression function |
| CN103236782A (en) * | 2013-03-28 | 2013-08-07 | 李信 | Anti-surge soft starting circuit of switching power supply |
| 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 |
| CN108199568A (en) * | 2018-01-05 | 2018-06-22 | 西安电子工程研究所 | A kind of inhibition in-rush current limiting circuit |
| CN110719041A (en) * | 2018-07-13 | 2020-01-21 | 意法半导体有限公司 | Power Conversion Circuit with Inrush Current Limiting Resistor Bypass |
| US11165243B2 (en) | 2019-04-24 | 2021-11-02 | Acer Incorporated | Power supply apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20130322 |