CN103023293A - Surge current suppression circuit of converter and operation method thereof - Google Patents
Surge current suppression circuit of converter and operation method thereof Download PDFInfo
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- CN103023293A CN103023293A CN2012103798669A CN201210379866A CN103023293A CN 103023293 A CN103023293 A CN 103023293A CN 2012103798669 A CN2012103798669 A CN 2012103798669A CN 201210379866 A CN201210379866 A CN 201210379866A CN 103023293 A CN103023293 A CN 103023293A
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Abstract
The invention provides a surge current suppression circuit of a converter and an operation method thereof, and particularly relates to the surge current suppression circuit which not only can suppress surge current but also can reduce power loss of the converter and an operation method thereof. The converter is applied to converting alternating-current voltage into direct-current voltage. With the adoption of the surge current suppression circuit of the converter and the operation method thereof provided by the invention, after the converter is turned on, input current from a bridge rectifier passes through a resistor and other circuits inside the converter. At present, a bypass unit is an opened state, and the resistor can restrain the surge current after the converter is turned on. Afterwards, when voltage of a center tap of an induction transformer enables a control signal generator to generate a control signal, the bypass unit is turned on according to the control signal. Therefore, compared with the prior art, the surge current suppression circuit provided by the invention not only can suppress the surge current, but also can reduce the power consumption of the converter.
Description
Technical field
The invention relates to a kind of burst current suppressing circuit and method of operation thereof of transducer, espespecially a kind ofly not only can suppress burst current, also can reduce burst current suppressing circuit and the method for operation thereof of the power loss of transducer, wherein this converter application turns direct voltage in alternating voltage.
Background technology
Generally speaking, the power supply product that alternating voltage turns direct voltage can add that behind bridge rectifier electrochemical capacitor will exchange electrofiltration and become direct current, and wherein before AC power was connected with the mains product, the voltage on the electrochemical capacitor was zero.Because the booting moment at power supply product, the alternating voltage of input is different from the voltage on the electrochemical capacitor, so power supply product can be according to formula (1), produce burst current, or be called the electric current of surging (Inrush Current), wherein burst current may cause fuse (Fuse) or the bridge rectifier damage in the power supply product.
Shown in (1), I is that burst current, t are that time, V are that voltage and C on the electrochemical capacitor is the capacitance of electrochemical capacitor.
In the prior art, reducing the most effective mode of burst current is thermistor of series connection, to lower the voltage regulation on the electrochemical capacitor, so that burst current is reduced.Yet thermistor can cause power supply product to have extra power loss.In addition, the thermistor that suppresses burst current can make resistance value descend after the power supply product start because the ambient temperature of power supply product rises, and when causing the power supply product warm start, the effect that thermistor suppresses burst current reduces.Therefore, for the designer of power supply product, prior art is not a good selection.
Summary of the invention
The object of the present invention is to provide a kind of burst current suppressing circuit and method of operation thereof of transducer, it can suppress this burst current, also can reduce the power loss of this transducer.
For achieving the above object, the invention provides a kind of burst current suppressing circuit of transducer, wherein this converter application turns direct voltage in alternating voltage, wherein this converter application turns direct voltage in alternating voltage, it is characterized in that, this burst current suppressing circuit comprises: resistance, in order to be coupled to the bridge rectifier of this transducer, to reduce the burst current after this transducer is started shooting; By-pass unit has first end, the second end and control end, and wherein the first end of this by-pass unit and the second end are respectively coupled to the two ends of this resistance; Inductive transformer is coupled to this resistance; And the control signal generator, be coupled to this resistance, this by-pass unit and this inductive transformer, in order to the centre tapped voltage according to this inductive transformer, produce the control end that controls signal to this by-pass unit, to open this by-pass unit.
Preferably, this control signal generator comprises: rectification unit is coupled to the centre cap of this inductive transformer, in order to rectification and this centre tapped voltage of filtering, to produce the first voltage; Partial pressure unit is coupled to this rectification unit, in order to according to this first voltage, produces this control signal; Voltage regulation unit is coupled to this partial pressure unit, in order to stablize this control signal; And protected location, be coupled to this voltage regulation unit, in order to limit the voltage quasi position of this control signal, to protect this by-pass unit.
Wherein, this rectification unit comprises: this rectification unit comprises: the first resistance, and the first end of this first resistance is coupled to the centre cap of this inductive transformer; The first electric capacity, the first end of this first electric capacity are coupled to the second end of this first resistance; The first diode, the P utmost point of this first diode is coupled to the second end of this first electric capacity; And the second diode, the P utmost point of this second diode is coupled between this resistance and this inductive transformer, and the N utmost point of this second diode is coupled to this first diode N utmost point.
Wherein, this partial pressure unit comprises: the second resistance, the first end of this second resistance are coupled to the N utmost point of this first diode, and the second end of this second resistance is coupled to the control end of this by-pass unit; And the 3rd resistance, the first end of the 3rd resistance is coupled to the second end of this second resistance, and the second end of the 3rd resistance is coupled between this resistance and this inductive transformer.
Wherein, this voltage regulation unit comprises: the second electric capacity, have first end, and be coupled to the control end of this by-pass unit, and the second end, be coupled to this resistance and this inductive transformer.
Wherein, this protected location comprises: zener diode, the N utmost point of this zener diode is coupled to the control end of this by-pass unit, the P utmost point of this zener diode and be coupled to this resistance and this inductive transformer between.
Preferably, this resistance is to be thermistor, and has positive temperature coefficient or negative temperature coefficient.Wherein, this resistance also can be non-thermistor.
Preferably, this by-pass unit is MOS (metal-oxide-semiconductor) transistor or thyristor.
Preferably, this inductive transformer is contained in the power factor circuit for rectifying of this transducer.
For achieving the above object, the present invention also provides a kind of method of operation of burst current suppressing circuit of transducer, this converter application turns direct voltage in alternating voltage, wherein this burst current suppressing circuit comprises resistance, by-pass unit, inductive transformer and control signal generator, this control signal generator comprises rectification unit, partial pressure unit, voltage regulation unit and protected location, this method of operation comprises: step 1, after this transducer start, this resistance reduces the burst current of the bridge rectifier of this transducer; And step 2, this control signal generator produces the control end that controls signal to this by-pass unit, to open this by-pass unit according to the centre tapped voltage of this inductive transformer.
Preferably, step 2 comprises: this centre tapped voltage of this rectification unit rectification and filtering, to produce the first voltage; And this partial pressure unit produces the control end that this controls signal to this by-pass unit according to this first voltage.Wherein, this method of operation comprises in addition: this voltage regulation unit is stablized this control signal; And this protected location limits the voltage quasi position of this control signal.This protected location limits the voltage quasi position of this control signal to protect this by-pass unit.
Compare with prior art, the invention provides a kind of burst current suppressing circuit and method of operation thereof that alternating voltage turns the transducer of direct voltage that be applied to.This burst current suppressing circuit and this method of operation are after transducer start, from the input current of bridge rectifier before this by resistance other circuit to this transducer.At this moment, by-pass unit is to be open-circuit condition, and this resistance can suppress the burst current after this transducer is started shooting.Then, when the centre tapped voltage of inductive transformer can make a control signal generator produce control signal, this by-pass unit can be opened according to this control signal.At this moment, because this input current is to flow through this by-pass unit, this resistance so this input current can not flowed through causes the power loss of this transducer to reduce.In addition, this resistance does not cause the temperature of this resistance to raise because this input current can not be flowed through, so under the condition that the heat of this transducer is started shooting, this resistance still has the effect that suppresses this burst current.Therefore, compared to prior art, the present invention not only can suppress this burst current, also can reduce the power loss of this transducer.
Description of drawings
Fig. 1 is the schematic diagram of the burst current suppressing circuit of a kind of transducer of the present invention.
Fig. 2 is the flow chart of method of operation of the burst current suppressing circuit of a kind of transducer of the present invention.
[primary clustering symbol description]
100 burst current suppressing circuits, 102 resistance
104 by-pass unit, 106 inductive transformers
108 control signal generators, 110 bridge rectifiers
112 power factor circuit for rectifying, 1082 rectification units
1084 partial pressure unit, 1086 voltage regulation units
1088 protected locations, 10,822 first resistance
10,824 first electric capacity, 10,826 first diodes
10,828 second diodes, 10,842 second resistance
10844 the 3rd resistance, 10,862 second electric capacity
10882 zener diode CT centre caps
CS control signal IC input current
VC voltage V1 the first voltage
The 200-210 step
Embodiment
For making purpose of the present invention, structure, feature and function thereof there are further understanding, hereby cooperate embodiment to be described in detail as follows.
Please refer to shown in Figure 1ly, be the circuit diagram of the burst current suppressing circuit 100 of a kind of transducer of the present invention, this converter application turns direct voltage in alternating voltage.This burst current suppressing circuit 100 comprises resistance 102, by-pass unit 104, inductive transformer 106 and control signal generator 108.As shown in Figure 1, resistance 102 is the bridge rectifiers 110 that are coupled to transducer, to reduce the burst current (IR) after transducer is started shooting, wherein resistance 102 can be thermistor (thermistor), and it has positive temperature coefficient or negative temperature coefficient.In addition, in another embodiment of the present invention, resistance 102 can be non-thermistor.By-pass unit 104 has two ends and control end, wherein two ends of by-pass unit 104 are two ends that are respectively coupled to resistance 102, wherein by-pass unit 104 is to can be N-type MOS (metal-oxide-semiconductor) transistor, P type MOS (metal-oxide-semiconductor) transistor or thyristor (silicon-controlled rectifier, SCR).Inductive transformer 106 is coupled to resistance 102, and wherein inductive transformer 106 is the power factor circuit for rectifying (Power Factor Correction, PFC) 112 that are contained in transducer.Control signal generator 108 is coupled to resistance 102, by-pass unit 104 and inductive transformer 106, in order to the voltage VC according to the centre cap CT of inductive transformer 106, produces control signal CS to the control end of by-pass unit 104, to open by-pass unit 104.
In addition, continue with reference to Fig. 1, control signal generator 108 comprises rectification unit 1082, partial pressure unit 1084, voltage regulation unit 1086 and protected location 1088.Rectification unit 1082 is coupled to the centre cap CT of inductive transformer 106, in order to the voltage VC of rectification and filtering centre cap CT, to produce the first voltage V1; Partial pressure unit 1084 is coupled to rectification unit 1082, in order to according to the first voltage V1, produces control signal CS; Voltage regulation unit 1086 is to be coupled to partial pressure unit 1084, in order to stablize control signal CS; Protected location 1088 is to be coupled to voltage regulation unit 1086, in order to limit the voltage quasi position of control signal CS, with protection by-pass unit 104.
As shown in Figure 1, rectification unit 1082 comprises the first resistance 10822, the first electric capacity 10824, the first diode 10826 and the second diode 10828.The first resistance 10822 has first end, is coupled to the centre cap CT of inductive transformer 106, and the second end; The first electric capacity 10824 has first end, is coupled to the second end of the first resistance 10822, and the second end; The P utmost point of the first diode 10826 is coupled to the second end of the first electric capacity 10824; The P utmost point of the second diode 10828 is coupled to resistance 102 and inductive transformer 106, and the N utmost point of this second diode 10828 is coupled to the first diode 10826N utmost point.
As shown in Figure 1, after transducer start, be by resistance 102 other circuit to the transducer from the input current IC of bridge rectifier 110.That is the voltage VC of the centre cap CT of inductive transformer 106 can't make control signal generator 108 produce control signal CS, so this moment, by-pass unit 104 was to be an open-circuit condition, and resistance 102 can suppress the burst current (IR) after the transducer start.But when the voltage VC of the centre cap CT of inductive transformer 106 can make control signal generator 108 produce control signal CS, by-pass unit 104 can be opened according to control signal CS.At this moment, because input current IC flows through by-pass unit 104, the resistance 102 so input current IC can not flow through causes the power loss of transducer to reduce.In addition, resistance 102 does not cause the temperature of resistance 102 to raise because input current IC can not flow through, so under the condition that the heat of transducer is started shooting, resistance 102 still has the effect of inhibition burst current (IR).
In addition; the present invention is not limited to the framework of rectification unit 1082, partial pressure unit 1084, voltage regulation unit 1086 and protected location 1088 among Fig. 1, that is all falls into category of the present invention so long as have rectification unit, partial pressure unit, voltage regulation unit and the protected location of above-mentioned functions.
Fig. 2 is the flow chart of method of operation of the burst current suppressing circuit 100 of a kind of transducer of the present invention, below in conjunction with Fig. 1 and Fig. 2 the method for operation of burst current suppressing circuit 100 of the present invention is done concrete description.Method of operation shown in Figure 2 is to utilize burst current suppressing circuit 100 explanations of Fig. 1, and detailed step is as follows:
Step 200: beginning;
Step 202: after the transducer start, resistance 102 reduces the burst current (IR) of the bridge rectifier 110 of transducer;
Step 204: the voltage VC of the centre cap CT of rectification unit 1082 rectifications and filter inductance transformer 106, to produce the first voltage V1;
Step 206: partial pressure unit 1084 produces control signal CS to the control end of by-pass unit 104 according to the first voltage V1;
Step 208: by-pass unit 104 is opened according to control signal CS;
Step 210: finish.
In step 202, as shown in Figure 1, after the transducer start, by resistance 102 other circuit to the transducer from the input current IC of bridge rectifier 110, this moment, by-pass unit 104 was to be open-circuit condition, and resistance 102 can lower the voltage regulation on the electrochemical capacitor of transducer, so that burst current (IR) is reduced, wherein resistance 102 is to can be thermistor, and has positive temperature coefficient or negative temperature coefficient.In addition, in another embodiment of the present invention, resistance 102 is to can be non-thermistor.In step 204, the rectification unit 1082 of control signal generator 108 is in order to the voltage VC of rectification and filtering centre cap CT, to produce the first voltage V1.In step 206, the partial pressure unit 1084 of control signal generator 108 can according to the first voltage V1, produce control signal CS.In addition, as shown in Figure 1, the voltage regulation unit 1086 of control signal generator 108 can be stablized control signal CS, and the protected location 1088 of control signal generator 108 can limit the voltage quasi position of control signal CS, with protection by-pass unit 104.In step 208, by-pass unit 104 can be opened according to control signal CS, and wherein by-pass unit 104 is to can be N-type MOS (metal-oxide-semiconductor) transistor, P type MOS (metal-oxide-semiconductor) transistor or thyristor.At this moment, as shown in Figure 1, because input current IC flows through by-pass unit 104, the resistance 102 so input current IC can not flow through causes the power loss of transducer to reduce.In addition, resistance 102 does not cause the temperature of resistance 102 to raise because input current IC can not flow through, so under the condition that the heat of transducer is started shooting, resistance 102 still has the effect of inhibition burst current (IR).
In sum, provided by the present inventionly be applied to burst current suppressing circuit and the method for operation thereof that alternating voltage turns the transducer of direct voltage, after the transducer start, from the input current of bridge rectifier before this by resistance other circuit to the transducer.At this moment, by-pass unit is to be open-circuit condition, and resistance can suppress the burst current after transducer is started shooting.Then, when the centre tapped voltage of inductive transformer can make the control signal generator produce control signal, by-pass unit can be opened according to control signal.At this moment, because input current is to flow through by-pass unit, the resistance so input current can not flowed through causes the power loss of transducer to reduce.In addition, resistance does not cause the temperature of resistance to raise because input current can not be flowed through, so under the condition that the heat of transducer is started shooting, resistance still has the effect that suppresses burst current.Therefore, compared to prior art, the present invention not only can suppress burst current, also can reduce the power loss of transducer.
The present invention is described by above-mentioned related embodiment, yet above-described embodiment is only for implementing example of the present invention.Must be pointed out that the embodiment that has disclosed does not limit the scope of the invention.On the contrary, the change of doing without departing from the spirit and scope of the present invention and retouching all belong to scope of patent protection of the present invention.
Claims (13)
1. the burst current suppressing circuit of a transducer, wherein this converter application turns direct voltage in alternating voltage, it is characterized in that, and this burst current suppressing circuit comprises:
Resistance is in order to be coupled to the bridge rectifier of this transducer, to reduce the burst current after this transducer is started shooting;
By-pass unit has first end, the second end and control end, and wherein the first end of this by-pass unit and the second end are respectively coupled to the two ends of this resistance;
Inductive transformer is coupled to this resistance; And
The control signal generator is coupled to this resistance, this by-pass unit and this inductive transformer, in order to the centre tapped voltage according to this inductive transformer, produces the control end that controls signal to this by-pass unit, to open this by-pass unit.
2. burst current suppressing circuit as claimed in claim 1 is characterized in that, this control signal generator comprises:
Rectification unit is coupled to the centre cap of this inductive transformer, in order to rectification and this centre tapped voltage of filtering, to produce the first voltage;
Partial pressure unit is coupled to this rectification unit, in order to according to this first voltage, produces this control signal;
Voltage regulation unit is coupled to this partial pressure unit, in order to stablize this control signal; And
Protected location is coupled to this voltage regulation unit, in order to limit the voltage quasi position of this control signal, to protect this by-pass unit.
3. burst current suppressing circuit as claimed in claim 2 is characterized in that, this rectification unit comprises:
The first resistance, the first end of this first resistance is coupled to the centre cap of this inductive transformer;
The first electric capacity, the first end of this first electric capacity are coupled to the second end of this first resistance;
The first diode, the P utmost point of this first diode is coupled to the second end of this first electric capacity; And
The second diode, the P utmost point of this second diode are coupled between this resistance and this inductive transformer, and the N utmost point of this second diode is coupled to this first diode N utmost point.
4. burst current suppressing circuit as claimed in claim 3 is characterized in that, this partial pressure unit comprises:
The second resistance, the first end of this second resistance are coupled to the N utmost point of this first diode, and the second end of this second resistance is coupled to the control end of this by-pass unit; And
The 3rd resistance, the first end of the 3rd resistance are coupled to the second end of this second resistance, and the second end of the 3rd resistance is coupled between this resistance and this inductive transformer.
5. burst current suppressing circuit as claimed in claim 2 is characterized in that, this voltage regulation unit comprises:
The second electric capacity, the first end of this second electric capacity is coupled to the control end of this by-pass unit, and the second end of this second electric capacity is coupled between this resistance and this inductive transformer.
6. burst current suppressing circuit as claimed in claim 2 is characterized in that, this protected location comprises:
Zener diode, the N utmost point of this zener diode is coupled to the control end of this by-pass unit, the P utmost point of this zener diode and be coupled to this resistance and this inductive transformer between.
7. burst current suppressing circuit as claimed in claim 1 is characterized in that, this resistance is to be thermistor or non-thermistor.
8. burst current suppressing circuit as claimed in claim 1 is characterized in that, this by-pass unit is MOS (metal-oxide-semiconductor) transistor or thyristor.
9. burst current suppressing circuit as claimed in claim 1 is characterized in that, this inductive transformer is contained in the power factor circuit for rectifying of this transducer.
10. the method for operation of the burst current suppressing circuit of a transducer; this converter application turns direct voltage in alternating voltage; wherein this burst current suppressing circuit comprises resistance, by-pass unit, inductive transformer and control signal generator; this control signal generator comprises rectification unit, partial pressure unit, voltage regulation unit and protected location, it is characterized in that: this method of operation comprises:
Step 1, after this transducer start, this resistance reduces the burst current of the bridge rectifier of this transducer; And
Step 2, this control signal generator produce the control end that controls signal to this by-pass unit, to open this by-pass unit according to the centre tapped voltage of this inductive transformer.
11. method of operation as claimed in claim 10 is characterized in that: step 2 comprises:
This centre tapped voltage of this rectification unit rectification and filtering is to produce the first voltage; And
This partial pressure unit produces the control end that this controls signal to this by-pass unit according to this first voltage.
12. method of operation as claimed in claim 11 is characterized in that: other comprises:
This voltage regulation unit is stablized this control signal; And
This protected location limits the voltage quasi position of this control signal.
13. method of operation as claimed in claim 12 is characterized in that: this protected location limits the voltage quasi position of this control signal to protect this by-pass unit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW101132767A TWI452792B (en) | 2012-09-07 | 2012-09-07 | Inrush current suppression circuit applied to an alternating current to direct current converter and operation method thereof |
| CN2012103798669A CN103023293A (en) | 2012-09-07 | 2012-10-09 | Surge current suppression circuit of converter and operation method thereof |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW101132767A TWI452792B (en) | 2012-09-07 | 2012-09-07 | Inrush current suppression circuit applied to an alternating current to direct current converter and operation method thereof |
| CN2012103798669A CN103023293A (en) | 2012-09-07 | 2012-10-09 | Surge current suppression circuit of converter and operation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103023293A true CN103023293A (en) | 2013-04-03 |
Family
ID=54834999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103798669A Pending CN103023293A (en) | 2012-09-07 | 2012-10-09 | Surge current suppression circuit of converter and operation method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103023293A (en) |
| TW (1) | TWI452792B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218824A (en) * | 2013-05-29 | 2014-12-17 | 群光电能科技股份有限公司 | Bypass device of negative temperature coefficient thermistor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI762968B (en) * | 2020-07-10 | 2022-05-01 | 宏碁股份有限公司 | Power supply capable of suppressing inrush current and reducing power consumption and related operation method |
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| JPH1014246A (en) * | 1996-06-21 | 1998-01-16 | Mels Corp | Inrush-current preventing circuit |
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| CN101990344A (en) * | 2009-08-03 | 2011-03-23 | 英特赛尔美国股份有限公司 | Inrush current limiter for an LED driver |
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| US6771521B1 (en) * | 2003-02-20 | 2004-08-03 | Delta Electronics, Inc. | Active snubber for synchronous rectifier |
| TWI309493B (en) * | 2006-04-28 | 2009-05-01 | Hon Hai Prec Ind Co Ltd | Inrush current limiting circuit and power supply device using the same |
| US7821750B2 (en) * | 2006-08-30 | 2010-10-26 | Leadtrend Technology Corp. | Voltage converter for preventing switch device from being damaged by voltage spike by utilizing protection circuit |
| TW200945720A (en) * | 2008-04-21 | 2009-11-01 | Spi Electronic Co Ltd | Flyback converter having active damping circuit |
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- 2012-09-07 TW TW101132767A patent/TWI452792B/en not_active IP Right Cessation
- 2012-10-09 CN CN2012103798669A patent/CN103023293A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1014246A (en) * | 1996-06-21 | 1998-01-16 | Mels Corp | Inrush-current preventing circuit |
| US6356468B1 (en) * | 1998-10-05 | 2002-03-12 | Nokia Networks Oy | Arrangement for limiting starting current in a power supply |
| JP2004015901A (en) * | 2002-06-05 | 2004-01-15 | Sanken Electric Co Ltd | Electric power converter |
| CN101594046A (en) * | 2008-05-29 | 2009-12-02 | 洋鑫科技股份有限公司 | Inrush current limiter |
| CN101990344A (en) * | 2009-08-03 | 2011-03-23 | 英特赛尔美国股份有限公司 | Inrush current limiter for an LED driver |
| CN202042894U (en) * | 2011-05-16 | 2011-11-16 | 厦门玛司特电子工业有限公司 | Thermistor short-circuit circuit for limiting inrush current of relay |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218824A (en) * | 2013-05-29 | 2014-12-17 | 群光电能科技股份有限公司 | Bypass device of negative temperature coefficient thermistor |
| CN104218824B (en) * | 2013-05-29 | 2016-12-28 | 群光电能科技股份有限公司 | The shunting device of negative tempperature coefficient thermistor |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201411976A (en) | 2014-03-16 |
| TWI452792B (en) | 2014-09-11 |
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Application publication date: 20130403 |