CN102148565A - Current quick shifting method and direct current power supply - Google Patents
Current quick shifting method and direct current power supply Download PDFInfo
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- CN102148565A CN102148565A CN201110074782XA CN201110074782A CN102148565A CN 102148565 A CN102148565 A CN 102148565A CN 201110074782X A CN201110074782X A CN 201110074782XA CN 201110074782 A CN201110074782 A CN 201110074782A CN 102148565 A CN102148565 A CN 102148565A
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Abstract
The invention discloses a current quick shifting method and direct current power supply. The characteristics of high speed, small loss, pressure resistance and strong through-current capability of an IGBT (insulated gate bipolar transistor) switch are used; the IGBT is used as a quick switch to control the on-off of a power supply; then a current quick shifting branch is formed by a plurality of IGBTs and a plurality of resistors, and is connected with a backward-level load; the on-off of all the IGBTs is independently controlled by a uniformed control system; the on-off of the IGBTs can be controlled so as to control the quick shifting of currents and adjust the switching depth and switching width of the currents. Checked by practice, the invention has the characteristics such as quick current switching response speed, high switching precision, small current ripples, and the like, and is suitable to be popularized and used in a plurality of occasions requiring current switching.
Description
Technical field
The invention belongs to the quick transfer techniques of electric current in the electric and electronic technical field, method and a kind of electric current of transfer shift DC power supply fast fast to be specifically related to a kind of electric current.
Background technology
In some commercial Application and scientific research and testing, often need the output current ripple little, the stability height, big electric current output changes rapidly the DC power supply that fast-response is opened and turn-offed.In order to make output current ripple little, generally be to increase big inductor filter in the line.Owing to used big inductor filter, big electric current output is difficult to realize that fast-response (microsecond level) changes, so introduced the quick transfer techniques of electric current.The quick transfer techniques of so-called electric current utilizes the fast switching characteristic of some power electronic device exactly, makes main output branch current transfer to other branch road, and main output branch current is changed fast.
At present, there are several electric currents to shift DC power supply fast in the prior art, win Several Methods of the prior art below and simply introduce based on the quick transfer method of different electric currents.
A kind of quick pass that is based on the vacuum trigger switch is run the method for pass jointly, this method is to adopt to utilize vacuum trigger switch (triggered vacuum switch in circuit, be called for short TVS) and quick vacuum circuit-breaker (the vacuum circuit breaker that closes a floodgate, abbreviation VCB) formation in parallel is closed fast and is run the pass jointly, utilize the quick making current of TVS source, utilize VCB that the electric current on the TVS is shunted simultaneously, current value on the reduction TVS also reduces TVS and goes up the current lead-through time, guarantees the useful life of TVS.Its major defect is that response speed is slow owing to adopted the vacuum circuit-breaker volume big, and transfer current can not be regulated.
A kind of method that is based on the short circuit current limiter of twice current transfer, this method combines high-speed switch, GTO switch and current-limiting resistance, keeping the little characteristic of mechanical switch running wastage simultaneously, realize the quick transfer and the limiting short-circuit current of short circuit current.The contemplated course of work is: when electrical network normally moves, and the high-speed switch closure, GTO turn-offs, and the rated load electric current can not produce remarkable loss by high-speed switch.When electrical network is short-circuited fault, by the short circuit current device for fast detecting, at first control the high-speed switch disjunction, the GTO conducting, short circuit current shifts to the GTO branch road rapidly, and switching arc extinguishes.Control GTO subsequently and turn-off, electric current is transferred to the parallel resistor branch road again fast, reaches the purpose of quick limiting short-circuit current.The key of twice current transfer scheme is the realization and the transfer of electric current from electric arc to electronic power switch of quick mechanical switch and electronic power switch.Its shortcoming is the response speed of quick mechanical switch and might arcing when disconnecting, and does not solve transfer current and regulate problem.
A kind of flow restricter method that is based on the primary current transfer, it is composed in parallel by high-speed switch and PTC resistance.Current limliting process electric current directly is transferred to PTC resistance by high-speed switch.The course of work is: when electrical network normally moves, and the high-speed switch closure, the rated load electric current can not produce remarkable loss by high-speed switch.When electrical network is short-circuited fault, by the short circuit current device for fast detecting, at first control the high-speed switch disjunction, electric current is transferred to the parallel resistor loop fast, and reaches the purpose of limiting short-circuit current.Its shortcoming is that voltage is high more, and the tungsten cold-state resistance is more little, and current transfer is fast more; But voltage is too high, can cause the arc control device volume to become big, and tungsten is if cold-state resistance is too little, and then temperature can not raise fast, causes the PTC effect not obvious, thereby can not reach predetermined current limitation effect.
At the many deficiencies that exist in the prior art, the present invention is proposed.
Summary of the invention
The objective of the invention is to by multianalysis quick transfer current technology and prior art, provide a kind of based on insulated gate bipolar transistor (English name IGBT, hereinafter to be referred as IGBT) the quick transfer method of electric current and a kind of electric current of coding circuit in parallel shift DC power supply fast, it is little to reach current ripple, shift depth-adjustment, the stability height, big electric current output changes rapidly the requirement that fast-response is opened and turn-offed.
The technical solution used in the present invention is: the quick transfer method of a kind of electric current, utilize IGBT switching speed height, the strong characteristics of little, the withstand voltage through-current capability of loss, with IGBT as high-speed switch, the control on/off, constitute electric current by two above IGBT and two above resistance again and shift branch road fast, is connected with the load of back level, all IGBT control its break-make by unified control system, and the break-make Control current by control IGBT shifts and recovery fast; And by the span of control limit of control regulating and controlling current transfer degree of depth, by control time regulating and controlling current transfer width.
Described IGBT as high-speed switch can adopt high-power IGBT.
Described electric current shifts two above IGBT in the branch road fast and the annexation of two above resistance can be: each IGBT connects as a unit group with a resistance, to organize the IGBT and the resistance unit parallel connection that are together in series more again, form the parallel circuits of a plurality of IGBT.
A kind of electric current shifts DC power supply fast, comprise rectifier transformer, controlled rectification circuit, filter circuit, high-speed switch IGBT, the electric current that is made of two above IGBT and two above resistance shifts branch road fast, and rectifier transformer is isolated the input power supply, and suitable voltage is provided, controlled rectification circuit becomes the AC signal of transformer output into direct current signal, at wave circuit after filtration, obtain the electric current that current ripple is little, precision is high, high-speed switch control IGBT current switching.The electric current that is made of two above IGBT and two above resistance shifts the branch road Control current fast and shifts the degree of depth, is connected with a back level load.All IGBT control its break-make by unified control system; And by the span of control limit of control regulating and controlling current transfer degree of depth, by control time regulating and controlling current transfer width.
Described IGBT as high-speed switch can adopt high-power IGBT.
The quick transfer method of a kind of electric current of the present invention and a kind of electric current shift power supply fast and comprise following advantage:
(1) based on the quick transfer techniques of big electric current of IGBT relatively the switching technology of original mechanical switch (as circuit breaker) etc. can avoid problems such as the arcing of circuit breaker in the switching process, noise, response speed has dropped to tens microseconds from a few tens of milliseconds.
(2) fast current based on IGBT shifts branch road when realizing that electric current shifts fast, has realized that the high accuracy of electric current is adjustable, and traditional current transfer does not realize the multistage adjusting of electric current.
(3) width of current transfer can be regulated from the number microsecond to the several seconds by program control.
(4) modularized design is adopted in the composing of IGBT, and all IGBT are contained in the module, and overvoltage is low, and installation dimension is little, can realize mass production.
(5), can realize that at short notice repeatedly electric current shifts fast based on the good performance of IGBT device.
Description of drawings
Fig. 1 is the theory diagram that a kind of fast current of the present invention shifts power supply.
Fig. 2 is the main circuit schematic diagram that a kind of fast current of the present invention shifts power supply.
Fig. 3 is the control principle figure that a kind of fast current of the present invention shifts power supply.
Embodiment
As shown in Figure 1, the quick transfer method of a kind of electric current, by transformer, the multi-pulse rectification circuit, T type LC filter circuit provides ripple little, the electric current that precision is high, utilize IGBT switching speed height, loss is little, the characteristics that withstand voltage through-current capability is strong, with high-power IGBT (IGBT0) as high-speed switch, the control on/off, constitute electric current by a plurality of IGBT and a plurality of resistance again and shift branch road fast, be connected with back level load, all IGBT control its break-make by unified control system, thereby shift and regulate the current transfer degree of depth fast by the break-make Control current of control IGBT.
Described electric current shifts in the branch road fast, each IGBT connects as one group with a resistance, to organize the IGBT and the resistance parallel connection that are together in series again more, form the parallel circuits of a plurality of IGBT, when current conversion took place, the setting of each resistance R resistance makes the electric current that passes through among each IGBT satisfy following the requirement: the electric current that IGBT1 passes through was 1/2 of a rated current, and the electric current that IGBT1 passes through is 1/4 of a rated current, by that analogy, the electric current that passes through of IGBT8 is 1/256 of a rated current.When IGBT1 ~ IGBT9 opens, regulate electric current and can reach 1/2 of total current, degree of regulation can reach the 1/256(about 0.4% of total current).
Described electric current shifts in the branch road fast, each IGBT connects as one group with a resistance, each group all has an independent control signal, ON time Control current by control IGBT shifts width, the width of current transfer is controlled by control system, time can be regulated, and regulates width and can be regulated to the several seconds by the number microseconds; And by controlling the break-make amplitude regulating and controlling current transfer degree of depth of IGBT, by the make-and-break time regulating and controlling current transfer width of control IGBT.
Embodiment one
As Fig. 1, shown in Figure 2, a kind of electric current according to the said method design shifts DC power supply fast, comprise rectifier transformer, controlled rectification circuit, filter circuit, high-speed switch IGBT(adopts high-power IGBT), (IGBT1 ~ IGBT9) (R1 ~ R9) electric current of resistance formation shifts branch road fast with 2-8 resistance by 2-8 IGBT, rectifier transformer is isolated the input power supply, and provide suitable voltage, controlled rectification circuit becomes the AC signal of transformer output into direct current signal, at wave circuit after filtration, it is little to obtain current ripple, the electric current that precision is high, high-speed switch control IGBT current switching, the electric current that is made of IGBT and resistance shifts the branch road Control current transfer degree of depth fast, is connected with a back level load.All IGBT control its break-make by unified control system, thereby shift and regulate the current transfer degree of depth fast by the break-make Control current of control IGBT.
Described rectifier transformer has two groups of windings, one group of Y-connection, and one group of triangle connects, and two groups of winding phase place correspondences differ 30 degree; Described controlled rectification circuit is made up of 12 groups of (is one group with fast acting fuse of a thyristor series connection) thyristors and fast acting fuse, constitutes 12 pulse wave rectifier circuit; AC signal handling through T type LC filter circuit, can obtain high stability, current with high accuracy through after rectifier transformer and the controlled rectification circuit processing.
Described electric current shifts in the branch road fast, each IGBT connects as one group with a resistance, to organize the IGBT and the resistance parallel connection that are together in series again more, form the parallel circuits of a plurality of IGBT, when current conversion took place, the setting of each resistance R resistance makes the electric current that passes through among each IGBT satisfy following the requirement: the electric current that IGBT1 passes through was 1/2 of a rated current, and the electric current that IGBT1 passes through is 1/4 of a rated current, by that analogy, the electric current that passes through of IGBT8 is 1/256 of a rated current.When IGBT1 ~ IGBT9 opens, regulate electric current and can reach 1/2 of total current, degree of regulation can reach the 1/256(about 0.4% of total current).
Three DC current sensor ZDA1 ~ ZDA3 and a voltage sensor ZDV are arranged in the circuit, being installed in respectively needs to gather on the branch road of current information and information of voltage, its effect is to provide control signal for power control system, in order to guarantee response speed, must adopt the current sensor of high response speed.
As shown in Figure 3, a kind of electric current of the present invention shifts power supply fast, and it is that core is calculated and handled that power control system adopts DSP+CPLD, adopts LCD that the whole state of power-supply system is shown.It is as follows that electric current shifts the power work principle fast: in the time of during power supply is in running order, provide the work required voltage by rectifier transformer, the rectification circuit that control system forms for 12 thyristors is sent out triggering signal, forms the controlled rectification power supply of 12 pulse waves; The current signal of the controlled rectification power supply output of 12 pulse waves is handled through T type LC filter network, obtains high stability, current with high accuracy; In current transfer, control signal is provided for 10 IGBT by control system, control the size that output current shifts by the conducting of IGBT; Control system is gathered the signal from No. 3 current sensors and one road voltage sensor; Control system also has the function of optical-fibre communications, carries out communication by RS485 optical communication interface and host computer.
In sum, electric current of the present invention shifts power supply fast and has the following advantages:
Based on the quick transfer method of big electric current of IGBT relatively the switching technology of original mechanical switch (as circuit breaker) etc. can avoid problems such as the arcing of circuit breaker in the switching process, noise, response speed has dropped to tens microseconds from a few tens of milliseconds.
Based on the coding techniques in parallel of IGBT when electric current shifts fast, realized that the high accuracy of electric current is adjustable, current precision can reach 0.4%.
3. the time of current transfer can be regulated from the number microsecond to the several seconds by program control.
4. all IGBT can be contained in the module, and overvoltage is low, and installation dimension is little, can realize mass production.
5. because the good performance of IGBT device can realize that at short notice repeatedly electric current shifts fast.
Claims (8)
1. quick transfer method of electric current, it is characterized in that utilizing IGBT switching speed height, the strong characteristics of little, the withstand voltage through-current capability of loss, with IGBT as high-speed switch, the control on/off, constitute electric current by some IGBT and some resistance again and shift branch road fast, be connected with back level load, all IGBT control its break-make by unified control system, thereby shift and regulate the current transfer degree of depth fast by the break-make Control current of control IGBT.
2. the quick transfer method of a kind of electric current according to claim 1 is characterized in that described IGBT as high-speed switch can adopt high-power IGBT.
3. the quick transfer method of a kind of electric current according to claim 1 and 2, it is characterized in that described electric current shifts some IGBT in the branch road fast and the annexation of some resistance can be: each IGBT connects as a unit with a resistance, to organize the IGBT and the resistance unit parallel connection that are together in series more again, form the parallel circuits of a plurality of IGBT.
4. an electric current shifts DC power supply fast, it is characterized by and comprise rectifier transformer, controlled rectification circuit, filter circuit, high-speed switch IGBT, the electric current that is made of IGBT and resistance shifts branch road fast, rectifier transformer is isolated the input power supply, and suitable voltage is provided, controlled rectification circuit becomes the AC signal of transformer output into direct current signal, at wave circuit after filtration, it is little to obtain current ripple, the electric current that precision is high, high-speed switch control IGBT current switching, the electric current that is made of IGBT and resistance shifts the branch road Control current transfer degree of depth fast, is connected with a back level load;
All IGBT control its break-make by unified control system, thereby shift and regulate the current transfer degree of depth fast by the break-make Control current of control IGBT.
5. a kind of electric current according to claim 4 shifts DC power supply fast, it is characterized by described IGBT as high-speed switch and can adopt high-power IGBT.
6. shift DC power supply fast according to claim 4 or 5 described a kind of electric currents, it is characterized by that described electric current shifts some IGBT in the branch road fast and the annexation of some resistance can be: each IGBT connects as a unit with a resistance, to organize the IGBT and the resistance unit parallel connection that are together in series more again, form the parallel circuits of a plurality of IGBT.
7. shift DC power supply fast according to claim 4 or 5 described a kind of electric currents, it is characterized by has three DC current sensor and a voltage sensor in entire circuit, and being installed in respectively needs to gather on the branch road of current information and information of voltage.
8. a kind of electric current according to claim 7 shifts DC power supply fast, it is characterized by direct current sensing and voltage sensor and provides control signal for power control system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110074782.XA CN102148565B (en) | 2011-03-28 | 2011-03-28 | Current quick shifting method and direct current power supply |
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| CN201110074782.XA CN102148565B (en) | 2011-03-28 | 2011-03-28 | Current quick shifting method and direct current power supply |
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| CN102148565B CN102148565B (en) | 2014-03-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109683653A (en) * | 2018-12-06 | 2019-04-26 | 大禹电气科技股份有限公司 | A kind of regulator control system for high-power direct current system |
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| CN101192790A (en) * | 2006-11-30 | 2008-06-04 | 核工业西南物理研究院 | 1/2 current adjuster/modulator |
| CN101854122A (en) * | 2010-04-15 | 2010-10-06 | 江苏科技大学 | High-voltage inverted low-voltage chopped-mode welding power supply |
| CN202004672U (en) * | 2011-03-28 | 2011-10-05 | 株洲变流技术国家工程研究中心有限公司 | Direct-current power supply capable of realizing quick current transfer |
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2011
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101192790A (en) * | 2006-11-30 | 2008-06-04 | 核工业西南物理研究院 | 1/2 current adjuster/modulator |
| CN101854122A (en) * | 2010-04-15 | 2010-10-06 | 江苏科技大学 | High-voltage inverted low-voltage chopped-mode welding power supply |
| CN202004672U (en) * | 2011-03-28 | 2011-10-05 | 株洲变流技术国家工程研究中心有限公司 | Direct-current power supply capable of realizing quick current transfer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109683653A (en) * | 2018-12-06 | 2019-04-26 | 大禹电气科技股份有限公司 | A kind of regulator control system for high-power direct current system |
| CN109683653B (en) * | 2018-12-06 | 2021-03-16 | 大禹电气科技股份有限公司 | Regulating and controlling system for high-voltage high-power direct-current system |
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| CN102148565B (en) | 2014-03-26 |
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