CN104796028A - Full-bridge circuit and large-power DC power supply with full-bridge circuit - Google Patents
Full-bridge circuit and large-power DC power supply with full-bridge circuit Download PDFInfo
- Publication number
- CN104796028A CN104796028A CN201410026013.6A CN201410026013A CN104796028A CN 104796028 A CN104796028 A CN 104796028A CN 201410026013 A CN201410026013 A CN 201410026013A CN 104796028 A CN104796028 A CN 104796028A
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- Prior art keywords
- full
- bridge circuit
- transformer
- inductance
- current
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention provides a full-bridge circuit and a large-power DC power supply with the full-bridge circuit. The full bridge circuit comprises switch tubes S1, S2, S3 and S4, a capacitor C1, a transformer T, an inductor L2 and a current detection component A. The inductor L2 and the current detection component A are connected in series and then connected in parallel with the primary side of the transformer T. Thus, the DC current component of the full-bridge circuit can be adjusted in real time, and the design cost can be reduced.
Description
Technical field
The present invention relates to electric and electronic technical field, particularly relate to a kind of full-bridge circuit and the high-power DC power supply containing this circuit.
Background technology
At present, the DC power supply of designing high-power adopts full-bridge circuit usually.As shown in Figure 1, need to control switching tube S1, S3 conducting simultaneously in full-bridge circuit or S2, S4 conducting simultaneously.But, due to the difference of device and control in the design process of circuit, the time of S1, S3 conducting and the time of S2, S4 conducting may be incomplete same, thus can make to occur DC component in circuit, cause transformer T magnetic bias to occur, if do not controlled, along with the accumulation of time, DC component is increasing, magnetic core of transformer can be caused saturated, damage equipment.In order to protect DC power supply device, prior art adds capacitance Cd in circuit, the loop of the DC component in blocking circuit.
But in the design process realizing described high-power DC power supply circuit, inventor finds that in prior art, at least there are the following problems: what adopt in prior art adds capacitance Cd; If Cd chooses too little,
Cd dividing potential drop can be caused excessive; If it is very large that the electric capacity Cd placed separately selected chooses, then cost is higher.
Summary of the invention
Embodiments of the invention provide a kind of full-bridge circuit and the high-power DC power supply containing this circuit.For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of full-bridge circuit provided by the invention, comprising: switching tube S1, S2, S3, S4, electric capacity C1, transformer T; It is characterized in that, described full-bridge circuit also comprises: inductance L 2 and current measuring element A; After described inductance L 2 is connected with described current measuring element A, be parallel to the elementary of described transformer T.
A kind of high-power DC power supply provided by the invention, comprising: full-bridge circuit as above.
A kind of full-bridge circuit that the embodiment of the present invention provides and the high-power DC power supply containing this circuit; By at primary shunt inductance L2 and current measuring element A; Adopt the present invention not only can realize the direct-current component regulating full-bridge circuit in real time, can also design cost be reduced.
Accompanying drawing explanation
Fig. 1 is a kind of high-power DC power supply circuit diagram of the prior art;
A kind of full-bridge circuit figure that Fig. 2 provides for the embodiment of the present invention;
A kind of high-power DC power supply circuit diagram that Fig. 3 provides for the embodiment of the present invention.
Embodiment
A kind of full-bridge circuit provided the embodiment of the present invention below in conjunction with accompanying drawing and the high-power DC power supply containing this circuit are described in detail.
As shown in Figure 2, be a kind of full-bridge circuit provided by the invention; This circuit comprises: switching tube S1, S2, S3, S4, electric capacity C1, transformer T and inductance L 2 and current measuring element A; After described inductance L 2 is connected with described current measuring element A, be parallel to the elementary of described transformer T.
DC component in order to the high-power DC power supply that the embodiment of the present invention can be provided controls in certain scope, guarantee that magnetic core can not be saturated, the present invention passes through the DC component in the elementary electric current of Real-Time Monitoring transformer T, adjust the closedown of full-bridge circuit breaker in middle pipe, and then realize the control of pulsewidth to direct current.For the alternating current possibility hundreds of ampere of powerful DC power supply device, but the exciting current of transformer may give just hundreds of milli A, the DC component of tens mA will cause the saturated of magnetic core, the current measurement device of existing general hundreds of ampere can not Measurement accuracy is so little simultaneously DC component, also just cannot carry out Current Control.Therefore, the present invention at transformer T primary parallel inductance L 2 and current measuring element A, will monitor its direct-current component in real time.
To divide into the inductance value of the elementary inductance L of described transformer T for L ', the inductance value of described inductance L 2 is L2 ', and the electric current flowing through described inductance L is IL; The D.C. resistance of described inductance L 2 is R2, and the D.C. resistance of the primary coil of described transformer T is R is example, is described in detail to above the present invention.Be illustrated in figure 3 a kind of high-power DC power supply provided by the invention;
Concretely, if the elementary inductance value of described transformer T is L ', the electric current flowing through described inductance L 2 is IL; Then the pass of the exciting current IT of the electric current I L that passes through of described inductance L 2 and transformer T is IL/IT=L '/L2 '.If the D.C. resistance of described inductance L 2 is R2, the D.C. resistance of the primary coil of described transformer T is R, be then ILD/ITD=R/R2 by the direct current ITD of transformer and the pass of the direct-current component ILD flowing through described inductance L 2.
By the conversion relation between above electric current, by detecting the electric current on the road of L2, the electric current of primary just can be calculated.If L '=L2 ', so, the electric current flow through in L2 just equals the exciting current in transformer T, if R=R2, the direct-current component so flow through in L2 just equals the elementary direct-current component flowing through transformer T.Because exciting current is very little, just passable with the current measuring element of a hundreds of mA small-range, and can Measurement accuracy DC component, reach the object controlling DC component at any time.
A kind of full-bridge circuit that the embodiment of the present invention provides and the high-power DC power supply containing this circuit; By at primary shunt inductance L2 and current measuring element A; Adopt the present invention not only can realize the direct-current component regulating full-bridge circuit in real time, can also design cost be reduced.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection range of claim.
Claims (4)
1. a full-bridge circuit, comprising: switching tube S1, S2, S3, S4, electric capacity C1, transformer T; It is characterized in that, described full-bridge circuit also comprises: inductance L 2 and current measuring element A; After described inductance L 2 is connected with described current measuring element A, be parallel to the elementary of described transformer T.
2. full-bridge circuit according to claim 1, is characterized in that, the elementary inductance value of described transformer T is L ', and the inductance value of described inductance L 2 is L2 '; If the electric current flowing through described inductance L 2 is IL; Then the pass of the exciting current IT of the electric current I L that passes through of described inductance L 2 and transformer T is IL/IT=L '/L2 '.
3. full-bridge circuit according to claim 1, it is characterized in that, if the D.C. resistance of described inductance L 2 is R2, the D.C. resistance of the primary coil of described transformer T is R, be then ILD/ITD=R/R2 by the direct current ITD of transformer and the pass of the direct-current component ILD flowing through described inductance L 2.
4. a high-power DC power supply, comprising: as the full-bridge circuit in claims 1 to 3 as described in any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410026013.6A CN104796028B (en) | 2014-01-21 | 2014-01-21 | A kind of full-bridge circuit and the high-power DC power supply containing the circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410026013.6A CN104796028B (en) | 2014-01-21 | 2014-01-21 | A kind of full-bridge circuit and the high-power DC power supply containing the circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104796028A true CN104796028A (en) | 2015-07-22 |
| CN104796028B CN104796028B (en) | 2018-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410026013.6A Active CN104796028B (en) | 2014-01-21 | 2014-01-21 | A kind of full-bridge circuit and the high-power DC power supply containing the circuit |
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| CN (1) | CN104796028B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110323949A (en) * | 2019-07-17 | 2019-10-11 | 武汉东城新能源有限公司 | A kind of high-frequency power supply circuit of anti-transformer bias |
| CN113241952A (en) * | 2021-06-25 | 2021-08-10 | 阳光电源股份有限公司 | Isolated bidirectional converter and control method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101741252A (en) * | 2010-02-11 | 2010-06-16 | 湘潭电机股份有限公司 | Direct-current power supply voltage stabilizer of accessory system for large-scale mine electric locomotive |
| CN102017380A (en) * | 2009-02-06 | 2011-04-13 | 新电元工业株式会社 | Current detecting circuit and transformer current measuring system |
| US20110310636A1 (en) * | 2010-06-17 | 2011-12-22 | Tdk-Lambda Corporation | Dc-dc converter |
-
2014
- 2014-01-21 CN CN201410026013.6A patent/CN104796028B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102017380A (en) * | 2009-02-06 | 2011-04-13 | 新电元工业株式会社 | Current detecting circuit and transformer current measuring system |
| CN101741252A (en) * | 2010-02-11 | 2010-06-16 | 湘潭电机股份有限公司 | Direct-current power supply voltage stabilizer of accessory system for large-scale mine electric locomotive |
| US20110310636A1 (en) * | 2010-06-17 | 2011-12-22 | Tdk-Lambda Corporation | Dc-dc converter |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110323949A (en) * | 2019-07-17 | 2019-10-11 | 武汉东城新能源有限公司 | A kind of high-frequency power supply circuit of anti-transformer bias |
| CN113241952A (en) * | 2021-06-25 | 2021-08-10 | 阳光电源股份有限公司 | Isolated bidirectional converter and control method thereof |
| US20220416672A1 (en) * | 2021-06-25 | 2022-12-29 | Sungrow Power Supply Co., Ltd. | Isolated bidirectional converter and method for controlling the same |
| JP2023004847A (en) * | 2021-06-25 | 2023-01-17 | サングロー パワー サプライ カンパニー リミテッド | Insulated bidirectional converter and control method thereof |
| JP7345582B2 (en) | 2021-06-25 | 2023-09-15 | サングロー パワー サプライ カンパニー リミテッド | Isolated bidirectional converter and its control method |
| US12021456B2 (en) * | 2021-06-25 | 2024-06-25 | Sungrow Power Supply Co., Ltd. | Isolated bidirectional converter and method for controlling the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104796028B (en) | 2018-10-23 |
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