CN202206325U - DC (direct current) bus charging circuit of numerical control type multi-DC channel converter - Google Patents
DC (direct current) bus charging circuit of numerical control type multi-DC channel converter Download PDFInfo
- Publication number
- CN202206325U CN202206325U CN2011203388307U CN201120338830U CN202206325U CN 202206325 U CN202206325 U CN 202206325U CN 2011203388307 U CN2011203388307 U CN 2011203388307U CN 201120338830 U CN201120338830 U CN 201120338830U CN 202206325 U CN202206325 U CN 202206325U
- Authority
- CN
- China
- Prior art keywords
- direct current
- circuit
- soft
- voltage
- digital control
- 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 - Lifetime
Links
Images
Abstract
The utility model relates to a DC bus charging circuit of a numerical control type multi-DC channel converter, which comprises a main circuit and a numerical control unit for regulating the output of the main circuit, wherein the main circuit is formed by sequentially connecting a DC/DC conversion circuit, a DC/AC conversion circuit and a grid synchronization switch; the DC/DC conversion circuit comprises a plurality of mutually independent DC channels, and at least one of the DC channels is a wave chopping DC channel provided with a DC wave chopping circuit; an input terminal of the DC channel is a load connection terminal, and an output terminal of the DC channel is provided with a DC bus capacitor for forming the voltage of the output terminal; one or multiple soft start subcircuits provided with soft start switches are connected between the load connection terminal and a power supply connection terminal of the grid synchronization switch, and at least one of the one or multiple soft start subcircuits is provided with a soft start capacitor. Due to the adoption of the DC bus charging circuit of the numerical control type multi-DC channel converter, the starting current is small in charging, the radiating design is easier, the rush current of grid synchronization is small, and the DC bus charging circuit can be widely applied to the charging process of a DC load.
Description
Technical field
The utility model relates to the dc bus charging circuit of many direct current channels current transformer in the Technics of Power Electronic Conversion technical field; Be particularly related to the dc bus charging circuit of many direct current channels of employing digital control type current transformer of a kind of DC/DC of containing and twice conversion of DC/AC, can be widely used in the charge-discharge test circuit of equipment such as charger, adapter, Switching Power Supply, storage battery.
Background technology
To the existing current transformer that comprises DC/DC and twice conversion of DC/AC; Dc bus charging circuit during its charging work of correspondence has following characteristics usually: the switch ends that is incorporated into the power networks is parallel with the soft resistance that opens; In the time will starting, let electric current flow through the soft resistance that opens earlier; The soft resistance that opens resistance is big more, and then soft to open electric current more little, thereby realize reducing the soft purpose that opens electric current.
But the moment of being incorporated into the power networks; The pressure reduction of switch both sides is bigger owing to be incorporated into the power networks, so impulse current is also bigger, in addition; If select the less soft resistance that opens of resistance for use; Because the existence of grid side ac filter electric capacity and isolating transformer, then soft to open electric current bigger, requires corresponding higher to soft heat radiation of opening resistance; If select the more powerful soft resistance that opens for use,, increased the volume and the cost of circuit although can reduce the soft electric current that opens.
The utility model content
In order to address the above problem; The utility model provides a kind of dc bus charging circuit of many direct current channels of digital control type current transformer; Both realized less charge initiation electric current, make heat dissipation design more or less freely, the less impulse current that is incorporated into the power networks when having realized charging again; Can be widely used in the charging process of DC load, reduce impact DC load and electrical network.
The main technical schemes that the utility model adopted is:
A kind of dc bus charging circuit of many direct current channels of digital control type current transformer; Comprise the main circuit that connects and composes successively by DC/DC translation circuit, DC/AC translation circuit and the switch that is incorporated into the power networks and be used to regulate the digital control unit of the output of said DC/DC translation circuit and DC/AC translation circuit; Said DC/DC translation circuit comprises many separate direct current channels; At least one said direct current channel is the copped wave direct current channel that which is provided with DC chopper circuit; The input of said direct current channel is the load link, and output is provided with the dc-link capacitance that is used to form its output end voltage, and output connects the DC end of said DC/AC translation circuit; One end of the said switch that is incorporated into the power networks connects the AC end of said DC/AC translation circuit; The power connector end that other end formation is connected with electrical network or AC power comprises that also one or more is provided with the soft branch road that opens that soft breakdown closes, and a said soft end that opens branch road connects the power connector end of the said switch that is incorporated into the power networks; The other end connects said load link; Said many soft opening differently in the branch road are softly opened branch road the direct current channel with different are corresponding respectively, and said one or more soft opening has at least one to be provided with the soft resistance that opens in the branch road, and at least one is provided with soft open resistance said soft to open branch road corresponding with said copped wave direct current channel.
Said DC/AC translation circuit holds the AC end to be provided with inverter bridge and isolating transformer successively from DC.
Said DC chopper circuit preferably is made up of direct current channel filter circuit and electronic switch assembly; Said direct current channel filter circuit is L, CL, LC or LCL filter circuit; Said electronic switch assembly is made up of first power switch pipe and second power switch pipe; The collector electrode of said first power switch pipe connects the positive terminal of dc-link capacitance; Emitter connects the collector electrode of said second power switch pipe and the cathode output end of said direct current channel filter circuit, and the emitter of said second power switch pipe connects the negative pole end of dc-link capacitance, and the control input end of said first, second power switch pipe connects the control output end of said digital control unit.
Dc bus charging circuit for above-mentioned multiple many direct current channels of digital control type current transformer; The controlled target of said digital control unit is preferably: change said dc-link capacitance voltage and make its peak value that is not less than said isolating transformer inside cord voltage, the output of controlling said inverter bridge makes inboard voltage of the said switch that is incorporated into the power networks and ac grid voltage with width of cloth homophase or basically with width of cloth homophase.
Said digital control unit is provided with the some sampled signal inputs that are used for sensor-lodging; Said transducer preferably includes and is respectively applied for the voltage sensor that detects the said switch that is incorporated into the power networks inside and outside both sides voltage and dc-link capacitance voltage, and is used to detect the soft current sensor that opens the current sensor of electric current and/or be used for the supply current of detection of grid.
The beneficial effect of the utility model:
Owing to be provided with the soft branch road that opens; Can be before be incorporated into the power networks through the soft resistance that opens the input of said direct current channel be inserted said AC network earlier; And utilize AC network that said dc-link capacitance is charged, and reduced on the one hand starting current, correspondingly reduced the heat radiation requirement; On the other hand; Before being incorporated into the power networks, realized charging to dc-link capacitance, for further to solve reduce to be incorporated into the power networks the time the impulse current problem done necessary preparation, a plurality of soft branch roads that open are set help optimal control start-up course.
Owing to be provided with the copped wave direct current channel that is provided with DC chopper circuit; Can make full use of the size of the voltage transformation changing function dc-link capacitance voltage of DC chopper circuit; Normally the raise voltage of dc-link capacitance can reach coupling with the voltage in the switch outside of being incorporated into the power networks in size to make the switch closure moment of the being incorporated into the power networks inboard voltage of switch that is incorporated into the power networks as much as possible.
Because said DC/AC translation circuit is provided with inverter bridge; The mapping function that can make full use of inverter bridge makes and to be incorporated into the power networks the voltage in the inboard voltage of switch and the outside with width of cloth homophase or basically with width of cloth homophase; Promptly reach synchronously, to reduce even to eliminate the switch closure rush of current of moment that is incorporated into the power networks.
Because employing is digital control, control precision is high, and the soft controlled current that opens, and makes power factor high, and harmonic wave is little, and in addition, DC bus-bar voltage also is in slave mode.
Description of drawings
Fig. 1 is the principle schematic of the utility model;
Fig. 2 is the schematic diagram of first embodiment of dc bus charging circuit;
Fig. 3 is the schematic diagram of second embodiment of dc bus charging circuit;
Fig. 4 is the schematic diagram of the 3rd embodiment of dc bus charging circuit;
Fig. 5 is the schematic diagram of the 4th embodiment of dc bus charging circuit;
Fig. 6 is that a circuit of direct current channel is formed embodiment;
Fig. 7 is the circuit diagram that two direct current channels are formed an embodiment of boost booster circuit;
Fig. 8 is the circuit diagram that three direct current channels are formed an embodiment of boost booster circuit;
Fig. 9 is an A.C. contactor mode of connection sketch map;
Figure 10 is the schematic diagram that an embodiment of the soft dc bus charging circuit that opens bypass is set;
Figure 11 is provided with sketch map for the sampled point that preferred parameter in the utility model detects.
Embodiment
Like Fig. 1, shown in 10; A kind of dc bus charging circuit of many direct current channels of digital control type current transformer; Comprise the main circuit that connects and composes successively by DC/DC translation circuit, DC/AC translation circuit and the switch that is incorporated into the power networks and be used to regulate the digital control unit of the output of said DC/DC translation circuit and DC/AC translation circuit that promptly the inner DC/DC of employing of this current transformer goes on foot conversion with DC/AC two.Electric energy can two-way flow between DC load and AC network, when electric energy by DC load when AC network flows, said current transformer is in the discharge operating state, otherwise then is in the charging operating state.Said DC/DC translation circuit comprises many separate direct current channels; At least one said direct current channel is the copped wave direct current channel that which is provided with DC chopper circuit; The input of said direct current channel is the load link, and like storage battery, electronic load etc., output is provided with the dc-link capacitance that is used to form its output end voltage; Dc-link capacitance can be used for the electric energy of temporary transient storage from load or AC network side, also can be used for DC filtering.Output connects the DC end of said DC/AC translation circuit, and an end of the said switch that is incorporated into the power networks connects the AC end of said DC/AC translation circuit, the power connector end that other end formation is connected with electrical network or AC power.
The dc bus charging circuit of said many direct current channels of digital control type current transformer comprises that also one or more is provided with the soft branch road that opens that soft breakdown closes; A said soft end that opens branch road connects the power connector end of the said switch that is incorporated into the power networks; The other end connects said load link; Said many soft opening differently in the branch road are softly opened branch road the direct current channel with different are corresponding respectively; Said one or more soft opening has at least one to be provided with the soft resistance that opens in the branch road, and at least one is provided with soft open resistance said soft to open branch road corresponding with said copped wave direct current channel.
Said DC/AC translation circuit holds the AC end to be provided with inverter bridge and isolating transformer successively from DC; Said inverter bridge is the core of realizing the DC/AC conversion; Said isolating transformer can be boost, step-down or 1:1 isolating transformer, whether the main circuit that the said switch that is incorporated into the power networks is used to control said current transformer inserts said AC network.
When starting said current transformer; Closed earlier said soft breakdown closes MC; The electric energy of AC network output is via soft resistance and the DC/DC translation circuit of opening, to the dc-link capacitance charging, because the switch that is incorporated into the power networks is in off-state; And said main circuit has the ability of certain adjusting output; Make the inboard voltage of switch that is incorporated into the power networks be relatively independent of the outside voltage (being ac grid voltage) of the switch that is incorporated into the power networks to a certain extent, make regulate the inboard voltage of the switch that is incorporated into the power networks reach with ac grid voltage with width of cloth homophase or become possibility with width of cloth homophase basically, also because soft existence of opening resistance can obviously reduce starting current.What is called is meant that with width of cloth homophase difference between two amplitudes (or two phase place) is within the corresponding difference tolerance limit that requires based on being incorporated into the power networks basically.
Utilize the voltage transformation function of said DC/DC translation circuit; Can easily change the size of the voltage of dc-link capacitance; The voltage of dc-link capacitance of normally raising makes the be incorporated into the power networks switch closure moment inboard voltage of switch that is incorporated into the power networks to reach coupling in size with its outside voltage, preferably dc-link capacitance voltage is elevated to more than the peak value of isolating transformer inside cord voltage.
For promptly fixed said inverter bridge; The no-load voltage ratio of in use not regulating said isolating transformer usually; But preferably regulate the interchange output of said inverter bridge; Change the voltage magnitude and the phase place of its output; Because there is the quantitative relationship of confirming in the output voltage of said inverter bridge with the inboard voltage of the switch that is incorporated into the power networks, the output of therefore regulating said inverter bridge is equivalent to change indirectly the amplitude and the phase place of the inboard voltage of the switch that is incorporated into the power networks, the same width of cloth homophase of outside voltage or basically with width of cloth homophase in the switch of therefore can realizing being incorporated into the power networks.
It is thus clear that; Through the soft interim path that opens branch road as start-up course is set; The gap that cooperation DC/DC conversion rising dc-link capacitance voltage dwindles outside voltage magnitude in the switch that is incorporated into the power networks, and outside voltage can make the steady butt joint in switch closure its interior outside of moment of being incorporated into the power networks with width of cloth homophase or basically with width of cloth homophase in the output voltage amplitude of adjusting inverter bridge and the further feasible switch that is incorporated into the power networks of phase place; Realize being incorporated into the power networks synchronously with this, thereby reduce even eliminate the switch closure rush of current of moment that is incorporated into the power networks.
Therefore usually the magnitude of voltage of said load has bigger direct current input range, adopts the boost type DC chopper circuit, make be incorporated into the power networks switch closure moment be incorporated into the power networks the inboard voltage of switch with its outside voltage reach coupling in size.As shown in Figure 6; The preferred boost type DC chopper circuit that constitutes by direct current channel filter circuit FLT and electronic switch assembly (i.e. brachium pontis shown in the figure) BR that adopts; Said direct current channel filter circuit can be L, CL, LC or LCL filter circuit; Be preferably LCL-T type filter circuit; Said electronic switch assembly is made up of first power switch pipe (like the S1 among Fig. 6) and second power switch pipe (like the S2 among Fig. 6); The collector electrode of said first power switch pipe connects the positive terminal of dc-link capacitance; Emitter connects the collector electrode of said second power switch pipe and the cathode output end of said direct current channel filter circuit (being the output of energy storage inductor), and the emitter of said second power switch pipe connects the negative pole end of dc-link capacitance, and said power switch pipe can be controllable type device for power switching such as metal-oxide-semiconductor, IGBT pipe, carborundum SiC power device or IGCT; The control input end of said first, second power switch pipe (being the gate pole end) connects the control output end of the corresponding control circuit of said digital control unit; Can regulate the chopper circuit parameter through the operating state and the mode of mode power controlling switching tubes such as pulse-width modulation thus, on dc-link capacitance, form needed output.
Be provided with said electronic switch assembly on other direct current channels except said copped wave direct current channel; Wherein the point that is connected with second power switch tube S 2 of first power switch tube S 1 constitutes the load link of its place direct current channel; The output of said electronic switch assembly constitutes the output of its place direct current channel; For the ease of expressing, call basic direct current channel (referring to the second direct current channel of Fig. 4) to this direct current channel.
The dc bus charging circuit of said many direct current channels of digital control type current transformer also preferably is provided with and is used to regulate the output voltage amplitude of said inverter bridge (being generally three phase inverter bridge) and the digital control unit of phase place; Through digital control technology said inverter bridge is controlled, improved the synchronous precision that is incorporated into the power networks.Said control unit preferably adopts digital signal processor DSP, digital signal controller DSC or single-chip microprocessor MCU.
In the DC/DC conversion, be fully independently between each direct current channel, so each direct current channel can work independently separately, promptly allow part direct current channel work in the practical application and the part direct current channel stops.
Preferably, said direct current channel is two or three, when being provided with two direct current channels; All be said copped wave direct current channel, perhaps one is said copped wave direct current channel, and another is said basic direct current channel; Be preferably the former; Constitute single-phase full bridge (or claiming the H bridge) boost booster circuit (referring to Fig. 7),, should be provided with the soft branch road that opens that opens resistance with soft at least one direct current channel for the situation that is provided with two direct current channels; When being provided with three direct current channels, all be said copped wave direct current channel, perhaps wherein two be said copped wave direct current channel; Article one, be said basic direct current channel, be preferably the former, constitute three-phase half-bridge boost booster circuit (referring to Fig. 8); Compare circuit shown in Figure 7; Its rate of pressure rise is faster, for the situation that is provided with three direct current channels, wherein should be provided with the soft branch road that opens that opens resistance with soft at least two direct current channels.
When being provided with more direct current channels, only need in the practical application to select 2-3 bar direct current channel wherein and form above-mentioned any boost booster circuit to get final product.
The dc bus charging circuit of said many direct current channels of digital control type current transformer can have multiple concrete way of realization; With the situation that is provided with two direct current channels is example; The soft relative position that opens resistance and soft breakdown pass can be changed each other can not be provided with filter (referring to Fig. 4) on (referring to Fig. 2 and 3), the part direct current channel, soft the opening of part can not be provided with the soft resistance (referring to Fig. 5) that opens on the branch road; As long as for current transformer generally speaking, the voltage of dc-link capacitance can be elevated to setting and get final product.
The primary side of said isolating transformer or secondary end can also be connected with the communication channel filter circuit, are used for the filtering of said DC/AC translation circuit AC side.
Said soft breakdown closes and can adopt A.C. contactor.Because generally load end and AC network side pressure difference are bigger; Conventional A.C. contactor is difficult to bear; Therefore select the many A.C. contactors (referring to the S type A.C. contactor that three pairs of main contactss are connected each other and formed that contains shown in Figure 9) that are provided with mutual series connection for use to main contacts; Make two said main contactss that are in distal-most end insert the corresponding soft branch road that opens, be equivalent to improve the voltage endurance capability of A.C. contactor.
The controlled target of said digital control unit is preferably: change said dc-link capacitance voltage and make its peak value that is not less than said isolating transformer inside cord voltage, the output of controlling said inverter bridge makes inboard voltage of the said switch that is incorporated into the power networks and ac grid voltage with width of cloth homophase or basically with width of cloth homophase.
Said digital control unit is provided with the some sampled signal inputs that are used for sensor-lodging, and voltage, electric current with the corresponding monitoring point of real-time reception feedback form closed-loop control.Said transducer preferably includes and is respectively applied for the voltage sensor that detects the said switch that is incorporated into the power networks inside and outside both sides voltage and dc-link capacitance voltage, and is used for detecting the soft current sensor that opens the current sensor of electric current (electric current that soft start-up process flows through direct current channel is the soft electric current that opens of respective straight circulation road) and/or be used for the supply current of detection of grid.In the practice, soft sampling of opening the supply current of electric current and electrical network is selected one usually carry out, its objective is that to make tested electric current (also being controlled electric current) identical with the phase place of correspondent voltage,, reduce harmonic wave to improve power factor.Wherein, Can use Hall element to carry out to soft detection of opening electric current; The detection of the inside and outside both sides of the switch that is incorporated into the power networks voltage is used for to the same width of cloth homophase of the switch medial and lateral voltage that is incorporated into the power networks or basically with the control of width of cloth homophase, softly opens electric current and dc-link capacitance voltage all is in slave mode.The sampled point that above-mentioned each parameter detects is provided with preferably shown in figure 11.
The output of said DC chopper circuit is preferably through said digital control unit and adopt the PWM mode to regulate.Through changing the ON time of the power switch pipe in the said electronic switch assembly; Change said boost type DC chopper circuit average value of output voltage; Thereby change the value of said dc-link capacitance voltage, be not less than the peak value of isolating transformer inside cord voltage in the practical application at least.
As one of circuit start condition; The AC end of said DC/AC translation circuit can be any two phase line voltages in three-phase three-wire system or the three-phase four-wire system, any phase phase voltage or the independent mains input voltage in the three-phase four-wire system from the mode that said AC network exchanges power taking, and power taking is comparatively convenient.
The soft course of work that opens circuit of above-mentioned various said current transformer is:
(1) closed soft breakdown closes, and alternating current charges to dc-link capacitance through the soft resistance that opens.
(2) through digital control technology the boost booster circuit is controlled, dc-link capacitance voltage is further raise, dc-link capacitance voltage should be not less than isolating transformer inside cord voltage peak at least.
(3) through digital control unit control three phase inverter bridge direct voltage is carried out the DC/AC conversion, and the ac grid voltage in the voltage of the feasible switch inboard of being incorporated into the power networks and the switch outside of being incorporated into the power networks is with width of cloth homophase or basically with width of cloth homophase.
(4) the closure switch that is incorporated into the power networks breaks off soft breakdown and closes, and accomplishes whole soft start-up process.
For the soft circuit that opens of aforesaid any one current transformer; At least one is provided with soft said soft opening of opening resistance can also be parallel with one or more and softly open bypass by what the bypass resistance of mutual series connection and by-pass switch were formed on the branch road, and the pairing soft branch road that opens of at least one said copped wave direct current channel is to be provided with the said soft soft branch road that opens that opens bypass.When being provided with two said direct current channels; The soft circuit structure that opens bypass is set can be referring to Fig. 8; In this case; Can adopt digital control technology to control the output of said DC chopper circuit, also can the output of said DC chopper circuit not regulated, prerequisite is can make bus capacitor voltage be elevated to setting through other means.Said by-pass switch also can adopt the aforesaid many A.C. contactors to main contacts that are provided with mutual series connection.
Being provided with the said soft soft course of work that opens circuit of said current transformer that opens bypass is:
(1) closed soft breakdown closes, and alternating current charges to dc-link capacitance through the soft resistance that opens.
(2) closes bypass switch, dc-link capacitance voltage further raises, and makes dc-link capacitance voltage be not less than at least to boost isolating transformer inside cord voltage peak.
(3) through digital control unit control three phase inverter bridge direct voltage is carried out the DC/AC conversion, and the ac grid voltage in the voltage of the feasible switch inboard of being incorporated into the power networks and the switch outside of being incorporated into the power networks is with width of cloth homophase or basically with width of cloth homophase.
(4) the closure switch that is incorporated into the power networks breaks off soft breakdown and closes, and accomplishes whole soft start-up process.
For being provided with the soft dc bus charging circuit that opens many direct current channels of digital control type current transformer of bypass; The said soft resistance that opens resistance can be greatly; It is less to make dc-link capacitance when charging soft open electric current; The resistance of said bypass resistance then can be smaller, devotes oneself to work and make on the basis that dc-link capacitance voltage raises at the soft branch road that opens, and makes the voltage of dc-link capacitance further improve; Even do not regulate the output of DC chopper circuit, also can make DC bus-bar voltage be not less than the isolating transformer inside cord voltage peak that boosts.
The utility model carries out soft opening through AC network, because the relatively stable soft start-up process that can make of AC network is relatively stable reliable, can adapt to different DC loads and different DC input voitage initialization conditions.
This paper to the main circuit of said current transformer, softly open branch road and soft to open bypass alleged " input ", " output " be to be directed against said current transformer to be in the flow of electrical power direction in the said current transformer main circuit when discharging operating state; And in fact electric energy can two-way flow in current transformer, and therefore above-mentioned expression does not constitute the qualification to electric energy actual flow direction.Alleged " inboard " is the side near load, and " outside " is the side near AC network.
Claims (10)
1. the dc bus charging circuit of many direct current channels of digital control type current transformer; Comprise the main circuit that connects and composes successively by DC/DC translation circuit, DC/AC translation circuit and the switch that is incorporated into the power networks and be used to regulate the digital control unit of the output of said DC/DC translation circuit and DC/AC translation circuit; Said DC/DC translation circuit comprises many separate direct current channels; At least one said direct current channel is the copped wave direct current channel that which is provided with DC chopper circuit; The input of said direct current channel is the load link, and output is provided with the dc-link capacitance that is used to form its output end voltage, and output connects the DC end of said DC/AC translation circuit; One end of the said switch that is incorporated into the power networks connects the AC end of said DC/AC translation circuit; Other end formation and the power connector end that electrical network or AC power are connected is characterized in that also comprising that one or more is provided with the soft branch road that opens that soft breakdown closes, and a said soft end that opens branch road connects the power connector end of the said switch that is incorporated into the power networks; The other end connects said load link; Said many soft opening differently in the branch road are softly opened branch road the direct current channel with different are corresponding respectively, and said one or more soft opening has at least one to be provided with the soft resistance that opens in the branch road, and at least one is provided with soft open resistance said soft to open branch road corresponding with said copped wave direct current channel.
2. the dc bus charging circuit of many direct current channels of digital control type current transformer according to claim 1 is characterized in that said DC/AC translation circuit holds AC end to be provided with inverter bridge and isolating transformer successively from DC.
3. the dc bus charging circuit of many direct current channels of digital control type current transformer according to claim 2; It is characterized in that said DC chopper circuit is made up of direct current channel filter circuit and electronic switch assembly; Said direct current channel filter circuit is L, CL, LC or LCL filter circuit; Said electronic switch assembly is made up of first power switch pipe and second power switch pipe; The collector electrode of said first power switch pipe connects the positive terminal of dc-link capacitance; Emitter connects the collector electrode of said second power switch pipe and the cathode output end of said direct current channel filter circuit, and the emitter of said second power switch pipe connects the negative pole end of dc-link capacitance, and the control input end of said first, second power switch pipe connects the control output end of said digital control unit.
4. the dc bus charging circuit of many direct current channels of digital control type current transformer according to claim 3 is characterized in that said first, second power switch pipe is metal-oxide-semiconductor, IGBT pipe, carborundum SiC power device or IGCT controllable type device for power switching.
5. the dc bus charging circuit of many direct current channels of digital control type current transformer according to claim 4; It is characterized in that said direct current channel is two or three; In the time of two; Wherein have at least one to be said copped wave direct current channel, in the time of three, wherein have at least two to be said copped wave direct current channel.
6. the dc bus charging circuit of many direct current channels of digital control type current transformer according to claim 5 is characterized in that the primary side of said isolating transformer or secondary end also are connected with the communication channel filter circuit.
7. the dc bus charging circuit of many direct current channels of digital control type current transformer according to claim 6 is characterized in that said soft breakdown closes many A.C. contactors to main contacts that employing is provided with mutual series connection.
8. according to the dc bus charging circuit of many direct current channels of the described digital control type of arbitrary claim current transformer among the claim 2-7; The controlled target that it is characterized in that said digital control unit is: change said dc-link capacitance voltage and make its peak value that is not less than said isolating transformer inside cord voltage, the output of controlling said inverter bridge makes inboard voltage of the said switch that is incorporated into the power networks and ac grid voltage with width of cloth homophase.
9. the dc bus charging circuit of many direct current channels of digital control type current transformer according to claim 8; It is characterized in that said digital control unit is provided with the some sampled signal inputs that are used for sensor-lodging; Said transducer comprises the voltage sensor that is respectively applied for the said switch that is incorporated into the power networks inside and outside both sides voltage of detection and dc-link capacitance voltage, and is used to detect the soft current sensor that opens the current sensor of electric current and/or be used for the supply current of detection of grid.
10. the dc bus charging circuit of many direct current channels of digital control type current transformer according to claim 9 is characterized in that the output of said DC chopper circuit adopts the PWM mode to regulate through said digital control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203388307U CN202206325U (en) | 2011-09-09 | 2011-09-09 | DC (direct current) bus charging circuit of numerical control type multi-DC channel converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203388307U CN202206325U (en) | 2011-09-09 | 2011-09-09 | DC (direct current) bus charging circuit of numerical control type multi-DC channel converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202206325U true CN202206325U (en) | 2012-04-25 |
Family
ID=45970420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203388307U Expired - Lifetime CN202206325U (en) | 2011-09-09 | 2011-09-09 | DC (direct current) bus charging circuit of numerical control type multi-DC channel converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202206325U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116224107A (en) * | 2023-03-09 | 2023-06-06 | 北京索英电气技术股份有限公司 | Battery test equipment and related system |
-
2011
- 2011-09-09 CN CN2011203388307U patent/CN202206325U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116224107A (en) * | 2023-03-09 | 2023-06-06 | 北京索英电气技术股份有限公司 | Battery test equipment and related system |
| CN116224107B (en) * | 2023-03-09 | 2023-11-14 | 北京索英电气技术股份有限公司 | Battery test equipment and related system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102306938B (en) | Starting method for current transformer | |
| CN202267739U (en) | Storage battery charge/discharge tester | |
| CN109889077A (en) | Single-phase and three-phase compatible AC/DC circuit and charge and discharge device | |
| CN107650729A (en) | The pre-charging device of the High-Voltage Electrical Appliances of new-energy automobile | |
| CN105576731A (en) | Vehicle-mounted charging and inversion bidirectional AC power supply system | |
| CN101166001A (en) | Active bi-directional electric power adjuster | |
| CN103187876A (en) | DC/DC circuit for UPS | |
| CN202663185U (en) | Series-parallel UPS (Uninterrupted Power Supply) with single inverter | |
| CN204205599U (en) | A kind of electronic type feeder line on-load voltage regulating device | |
| CN103606956B (en) | For the power decoupling circuit of photovoltaic combining inverter | |
| CN110071572A (en) | A kind of Bidirectional charging-discharging one emergency power supply unit and its control method | |
| CN102355125B (en) | Soft start circuit of converter | |
| CN103138355A (en) | Charge-discharge control system | |
| CN101567573B (en) | Uninterrupted power and control method thereof | |
| CN106208268B (en) | Based on the constant current constant voltage induction type wireless charging system for becoming einer Primargrosse | |
| CN202206324U (en) | Direct current (DC) bus charging circuit of multi DC (direct current) channel converter | |
| CN202210760U (en) | Soft starting circuit of current transformer | |
| CN103078548A (en) | Single-stage bidirectional buck-boost inverter | |
| CN113193743A (en) | Wide constant power range charge-discharge system | |
| CN202206325U (en) | DC (direct current) bus charging circuit of numerical control type multi-DC channel converter | |
| CN201789335U (en) | Unconventional high-power uninterruptable power source | |
| CN204290428U (en) | A kind of integrate motor drives and battery charging function module | |
| CN208094445U (en) | Vector closes 360 ° of phase and amplitude controllable AC converters | |
| CN101783514B (en) | Correction method and circuit of AC load power factor | |
| CN207530722U (en) | vehicle-mounted inverter circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120425 |
|
| CX01 | Expiry of patent term |