CN201656760U - Surge-prevention soft starting circuit - Google Patents

Surge-prevention soft starting circuit Download PDF

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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
Authority
CN
China
Prior art keywords
surge
current
inverter
soft starting
starting circuit
Prior art date
Application number
CN2010201680495U
Other languages
Chinese (zh)
Inventor
李兴伟
李兴三
Original Assignee
临沂施乃通电气技术有限公司
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Filing date
Publication date
Application filed by 临沂施乃通电气技术有限公司 filed Critical 临沂施乃通电气技术有限公司
Priority to CN2010201680495U priority Critical patent/CN201656760U/en
Application granted granted Critical
Publication of CN201656760U publication Critical patent/CN201656760U/en

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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

A kind of anti-surge soft starting circuit

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.
CN2010201680495U 2010-03-22 2010-03-22 Surge-prevention soft starting circuit CN201656760U (en)

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

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010201680495U CN201656760U (en) 2010-03-22 2010-03-22 Surge-prevention soft starting circuit

Country Status (1)

Country Link
CN (1) CN201656760U (en)

Cited By (8)

* Cited by examiner, † Cited by third party
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 Stander type server system
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
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
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

Cited By (10)

* Cited by examiner, † Cited by third party
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 Stander type server system
CN102955550B (en) * 2011-08-25 2015-09-09 英业达股份有限公司 A kind of rack-mounted server system
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
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
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

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20101124

Termination date: 20130322

C17 Cessation of patent right