CN101783612A - Three-arm power conversion device - Google Patents
Three-arm power conversion device Download PDFInfo
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- CN101783612A CN101783612A CN200910000527A CN200910000527A CN101783612A CN 101783612 A CN101783612 A CN 101783612A CN 200910000527 A CN200910000527 A CN 200910000527A CN 200910000527 A CN200910000527 A CN 200910000527A CN 101783612 A CN101783612 A CN 101783612A
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Abstract
The invention discloses a three-arm power conversion device, which comprises a first output/input port, a second output/input port, a third output/input port, a three-arm bridge circuit, a controller, a filter circuit and a decoupling loop element. The three-arm power conversion device is only provided with an electric converter and the three-arm bridge circuit, only controls a first current component and a second current component of a second output/input current of a middle end point of the two arms in the three-arm bridge circuit by using the controller to convert electric energy among the first output/input port, the second output/input port and the third output/input port, and has multiple functions according to various circuits which are connected with the output/input ports. Therefore, the three-arm power conversion device can convert the electric energy among the output/input ports only by using the three-arm bridge circuit, and effectively simplifies a power circuit and a control circuit required when the electric energy is converted.
Description
Technical field
The present invention relates to a kind of three-arm power conversion device,, and can power and between these three output/input ports, to make the three-arm power conversion device of conversion particularly about having three output/input ports.
Background technology
Because power electronic technology is advanced by leaps and bounds in recent years, many devices based on power electronics have been used in the association area of electric energy conversion.Basic electric energy conversion comprises the conversion of AC to DC electric energy, the conversion of dc-dc electric energy, direct current to exchanging the electric energy conversion and exchanging to exchanging electric energy conversion etc.Generally speaking, the power inverter of basic electric energy conversion only comprises an electric power converter, but if must finish two kinds of basic electric energy conversion operations, then must utilize two groups of electric power converters to form the power inverter with this function.For example, Figure 1 shows that conventional online formula UPS, comprise two groups of electric power converters 91,92, wherein this electric power converter 91 carries out the conversion of ac/dc electric energy, this electric power converter 92 then carries out the conversion of AC/DC electric energy, so that an AC power is carried out the electric energy conversion, and then supplies high-quality AC energy to a load; Again, as shown in Figure 2, it illustrates the circuit framework of a traditional low capacity off-line type UPS, because a battery number average of general low capacity off-line type UPS is few, its direct voltage that can provide is also lower, when causing this battery to discharge, must be by two groups of electric power converters 93,94 to supply power to a load, wherein, this electric power converter 93 carries out the direct current/direct current power conversion, this electric power converter 94 then carries out AC/DC electric energy conversion, so that after the direct current energy that this battery is exported boosts, be converted to AC energy again and be supplied to this load; And as shown in Figure 3, it illustrates the system architecture of the civil power interconnection system solar power system that is disclosed as U.S. Pat 7079406 and US6678174 etc., the direct current energy that one solar cell of this system is exported must be through two groups of electric power converters 95,96 just can be connected to an alternating-current system, wherein this electric power converter 95 carries out the direct current/direct current power conversion in order to the unsettled direct current energy with solar cell output, to change into a galvanic current energy, this electric power converter 96 then carries out just the electric energy of this solar cell being imported this alternating-current system after the conversion of AC/DC electric energy.
In sum, in traditional power inverter, if when desiring to finish two kinds of basic electric energy conversion operations, promptly must utilize two groups of electric power converters to finish, it causes power circuit and control circuit complexity higher, and also increases manufacturing cost.For these reasons, be necessary further to improve above-mentioned existing power conversion equipment.
Summary of the invention
Main purpose of the present invention provides a three-arm power conversion device, and it comprises three output/input ports, and controls this three-arm power conversion device and change between this three output/inputs port with multi-form electric energy.
For reaching aforementioned goal of the invention, technological means that the present invention used and the effect that can reach by this technological means are:
A kind of three-arm power conversion device, it comprises: one first output/input port, one second output/input port, one the 3rd output/input port, one or three arm bridge circuits, a controller, a filter circuit and a uncoupling loop element.This three output/inputs port respectively has two end points, this three arms bridge circuit has two direct current end points and three middle end points, this two direct currents end points is connected to this two end points at this first output/input port respectively, and this three middle end points is located at the intermediate point of each three single armed circuit of this three arms bridge circuit respectively.This controller electrically connects this three arms bridge circuit, for the control respectively output or the input current of the middle end points of this direct current end points and each arm.One end of this filter circuit is connected to the wherein middle end points of two single armed circuit of this three arms bridge circuit, the other end of this filter circuit then is connected to this two end points at this second output/input port, the high-frequency harmonic electric current that this filter circuit is produced for this three arms bridge circuit of filtering.This uncoupling loop element has one first end points, one second end points and one the 3rd end points, this first and second end points is connected to this two end points at this second output/input port, and the middle end points of the 3rd end points and another single armed circuit of not being connected with this filter circuit then is connected to this two end points at the 3rd output/input port respectively.Wherein, this first output/input port is for exporting or import a direct current electric energy; This second output/input port is for output or import a direct current or AC energy; And the 3rd output/input port is also for exporting or import a direct current or AC energy.Whereby, only utilize this three arms bridge circuit to make power conversion between the port, can effectively simplify power circuit and control circuit required when carrying out the electric energy conversion in this output/input respectively.
The controller of described three-arm power conversion device is to utilize current control mode to control this three arms bridge circuit, the middle end points of this two single armeds circuit that is connected with this filter circuit with further control produces an output or an input current respectively, wherein this this two electric current that end points is produced in the middle of two all respectively comprises one first electric current composition and one second electric current composition, and the pass of the first electric current composition of this two electric current is an equal and opposite in direction and phase place is opposite, and the pass of the second electric current composition of this two electric current is that equal and opposite in direction and phase place are also identical.Whereby, can effectively utilize this three-arm power conversion device respectively carrying out power conversion between this output/input port.
Beneficial effect of the present invention is effectively to simplify power circuit and control circuit required when carrying out the electric energy conversion, and can reach the effect that reduces cost and have bigger use nargin.
Description of drawings
Fig. 1: the system architecture diagram of existing electric power converter.
Fig. 2: the system architecture diagram of another existing electric power converter.
Fig. 3: the system architecture diagram of another existing electric power converter.
Fig. 4: the circuit framework figure of the three-arm power conversion device of preferred embodiment of the present invention.
Fig. 5 a: the circuit diagram of first kind of three arm circuit framework of the three-arm power conversion device of preferred embodiment of the present invention.
Fig. 5 b: the circuit diagram of second kind of three arm circuit framework of the three-arm power conversion device of preferred embodiment of the present invention.
Fig. 6 a: the circuit diagram of first kind of uncoupling circuit framework of the three-arm power conversion device of preferred embodiment of the present invention.
Fig. 6 b: the circuit diagram of second kind of uncoupling circuit framework of the three-arm power conversion device of preferred embodiment of the present invention.
Fig. 7 a: the system architecture diagram the when three-arm power conversion device of preferred embodiment of the present invention is applied to the solar power system of civil power parallel connection type.
Fig. 7 b: the system architecture diagram the when three-arm power conversion device of preferred embodiment of the present invention is applied to the solar power system of self.
Fig. 7 c: another system architecture diagram when three-arm power conversion device of preferred embodiment of the present invention is applied to the solar power system of self.
Fig. 8: the system architecture diagram the when three-arm power conversion device of preferred embodiment of the present invention is applied to UPS.
Fig. 9 a: the system architecture the when three-arm power conversion device of preferred embodiment of the present invention is applied in electric governor.
Fig. 9 b: another system architecture when three-arm power conversion device of preferred embodiment of the present invention is applied in electric governor.
The main element symbol description:
12 second output/input ports, 1 three-arm power conversion device, 11 first output/input ports
13 the 3rd output/input ports, 14 3 arm bridge circuit 14a, three arm circuit frameworks
14b three arm circuit frameworks 141 direct current end points 142 direct current end points
15 filter circuits, 16 uncoupling loop element 16a uncoupling circuit frameworks
163 the 3rd end points 16b uncoupling circuit frameworks, 161 first end points
162 second end points, 17 controllers
Embodiment
For above-mentioned and other purpose of the present invention, feature and advantage can be become apparent, in hereinafter will exemplifying preferred embodiment and conjunction with figs. elaborates, but it is not to be in order to limit the present invention.
Please refer to shown in Figure 4ly, it is the circuit framework figure of the preferred embodiment of three-arm power conversion device of the present invention.This three-arm power conversion device 1 comprises one first output/input (I/O) port 11, one second output/input (I/O) port 12, one the 3rd output/input (I/O) port, 13,1 arm bridge circuits 14, a filter circuit 15, a uncoupling loop element 16 and a controller 17.This first, second and third I/ O port 11,12,13 all respectively has two end points, and for being connected between the power supply and load of various direct currents or interchange, be supplied to this load so that the electric energy of various these power supplys is converted to suitable form, or electric energy is done suitably conversion with the transmission at various power supply intercropping energy.This three arms bridge circuit 14 is connected in parallel by three single armed circuit and forms, these three arms bridge circuit, 14 tools, two direct current end points 141,142 wherein, and this two direct currents end points 141,142 is connected to two end points at an I/O port 11; In addition, end points in the middle of respectively this single armed circuit of this three arms bridge circuit 14 all has one, to form three middle end points 143,144,145 of this three arms bridge circuit 14, and the middle end points 143,144 of two these single armed circuit wherein is connected to this filter circuit 15, and the middle end points 145 of this another single armed circuit then is connected to one of two end points at the 3rd I/O port 13.This filter circuit 15 be connected in this three arms bridge circuit 14 two in the middle of between this two end points at end points 143,144 and the 2nd I/O port 12, and this filter circuit 15 is preferable to be made up of two inductors, so that filtering high-frequency harmonic electric current, and one of this two inductor is connected between this of the 2nd I/O port 12 double-pointed one of them and this centre end points 143, and another of this two inductor then is connected between double-pointed another and this centre end points 144 of this of the 2nd I/O port 12.This uncoupling loop element 16 comprises first end points 161, one second end points 162 and one the 3rd end points 163, wherein this first end points 161 and second end points, 162 end points are connected to two end points at the 2nd I/O port 12 respectively, the 3rd end points 163 then be connected to this of the 3rd I/O port 13 double-pointed another.This controller 17 is electrically connected at this three arms bridge circuit 14, with the control respectively output or the input current of the middle end points 143,144,145 of this direct current end points 141,142 and each arm.
Please refer to shown in Fig. 5 a and the 5b, it is two kind of three arm circuit framework 14a, 14b of this three arms bridge circuit 14.First kind of three arm circuit framework 14a shown in Fig. 5 a, three single armed circuit of this three arms bridge circuit 14 form by two groups of electronic power switch element connected in series, and each group electronic power switch element is made up of an electronic power switch and an anti-phase diode.Whereby, the direct current end points of this three single armeds circuit is positioned at the respectively direct current end points 141,142 of two ends to form this three arms bridge circuit 14 of this single armed circuit, and the tie point between two groups of electronic power switch elements of same single armed circuit is the middle end points of this single armed circuit and constitute the middle end points 143,144,145 of this three arms bridge circuit 14.Shown in Fig. 5 b, compared to aforesaid first kind of three arm circuit framework 14a, second kind of three arm circuit framework 14b of this three arms bridge circuit 14 only constitutes two single armed circuit of the middle end points 143,144 of this arm and is made up of two groups of electronic power switch element connected in series respectively, and another single armed circuit of this second kind of three arm circuit framework 14b is formed by two capacitors in series, wherein the capacitance of this two capacitor equates, and the tie point between this two capacitor forms the middle end points 145 of this three arms bridge circuit 14.Wherein respectively this electronic power switch element of this three arms bridge circuit 14 all is connected to this controller 17, and this electronic power switch element is conducting or cut-off state so that this controller 17 is controlled respectively.
Please refer to shown in Fig. 6 a and the 6b, it is two kinds of uncoupling circuit framework 16a, 16b of this uncoupling loop element 16.First kind of uncoupling circuit framework 16a shown in Fig. 6 a, this uncoupling loop element 16 is made up of a transformer, wherein the primary side of this transformer and the turn ratio between the secondary side are 1: 1, and an end of the primary side of this transformer is this first end points 161, and an end of the secondary side of this transformer is this second end points 162.And the other end of the primary side of this transformer and secondary side interconnects and forms the 3rd end points 163.Because the primary side and the turn ratio between the secondary side of this transformer are 1: 1, so flow into or to flow out this first end points 161 necessary identical with the electric current of second end points 162, after making the two identical electric currents that flow into by this first end points 161 and second end points 162 respectively synthesize an electric current, flow out by the 3rd end points 163, or after flowing into electric currents and shunting and form two identical electric currents by the 3rd end points 163, flow out by this first end points 161 and second end points 162, this moment, this transformer can be regarded as open circuit for the 2nd I/O port 12.Please refer to second kind of uncoupling circuit framework 16b shown in Fig. 6 b, this uncoupling loop element 16 is made up of the capacitor of two equivalences, wherein an end of this two capacitor forms this first end points 161 and second end points 162, and the other end of this two capacitor interconnects to form the 3rd end points 163.Whereby, this formed loop of two capacitors also can make two electric currents that flowed into by this first end points 161 and second end points 162 respectively synthesize an electric current by 163 outflows of the 3rd end points, or forms two electric currents by this first end points 161 and 162 outflows of second end points by the 3rd end points 163 inflow one electric currents and shunting.
Referring again to Fig. 4,5 and 6, the present invention controls the state of each electronic power switch element of this three arms bridge circuit 14 by this controller 17 with current control mode, exports or be input into this three arms bridge circuit 14 respectively so that further be controlled at the electric current of two output/inputs of this centre end points 143,144.More in detail, two output/input currents of these two middle end points 143,144 all comprise one first electric current composition and one second electric current composition, wherein the pass of the first electric current composition of two these output/input currents is an equal and opposite in direction and phase place is opposite, two should output/input currents the relations of the second electric current composition then be that equal and opposite in direction and phase place are also identical.Because the first electric current composition of this two output/input current is an equal and opposite in direction and phase place is opposite, therefore the first electric current composition that should two output/input currents, this uncoupling loop element 16 can be considered an open circuit element, the circuit that the 2nd I/O port 12 is connected with the 2nd I/O port 12 so the first electric current composition of this two output/input current is flowed through, and then form a current circuit.Meaning promptly, one of them of the first electric current composition of this two output/input current is from the outflow of the end at the 2nd I/O port 12, the first electric current composition of another this two output/input currents then flows into the other end at the 2nd I/O port 12.Otherwise, the electric current of 12 connecting circuits of this two end points and the 2nd I/O port at the 2nd I/O port 12 is necessary for one-in-and-one-out owing to flow through, promptly, flow through two electric currents at the 2nd I/O port 12 must equal and opposite in direction and phase place opposite, and the second electric current composition of this two output/input current is that equal and opposite in direction and phase place are identical, the 2nd I/O port 12 so two these second electric current compositions can't be flowed through.More in detail, the second electric current composition of this two output/input current will flow through this first end points 161 and second end points 162 of this uncoupling loop element 16, and after integrating in the inside of this uncoupling loop element 16, an end that is flowed out to the 3rd I/O port 13 by the 3rd end points 163 is exported, and the other end by the 3rd I/O port 13 flow to the middle end points 145 of this three arms bridge circuit 14 and forms another current circuit again; Perhaps, middle end points 145 from this three arms bridge circuit 14 flows out an electric current, and by the output of one of this two end points at the 3rd I/O port 13, again by this double-pointed another input at the 3rd I/O port 13, again through after these uncoupling loop element 16 shuntings, become the second electric current composition of this two output/input current, thereby also form a current circuit.
In sum, the three-arm power conversion device 1 of preferred embodiment of the present invention can be at the 2nd I/O port 12 and the 3rd I/O port 13 respectively the independent respectively electric current of controlling of output/input carry out electric energy conversion.In addition, according to conservation of energy principle, when having a difference between the electric energy that the 2nd I/O port 12 and the 3rd I/O port 13 are changed, cause the electric energy of this difference must flow out or flow into an I/O port 11, therefore the three-arm power conversion device 1 of preferred embodiment of the present invention can only utilize this three arms bridge circuit 14, promptly between an I/O port 11, the 2nd I/O port 12 and the 3rd I/O port 13, make power conversion, can effectively simplify power circuit and control circuit required when carrying out the electric energy conversion.In addition, when using three arm type electric power converter of the present invention, the one I/O port 11 is only for the power supply or the load that are connected in a direct current, and when if uncoupling circuit 16 is made of the capacitor of this two equivalence for this second kind of uncoupling circuit framework 16b, this second and third I/ O port 12,13 can select to be connected in the power supply or the load of a direct current or interchange arbitrarily; But when if this uncoupling circuit 16 is made of this transformer for this first kind of uncoupling circuit framework 16a, 12 at the 2nd I/O port must be connected in a power supply or a load that exchanges.
Please refer to shown in Fig. 7 a, 7b and the 7c system architecture diagram when it is applied to solar power system for the preferred embodiment of three-arm power conversion device of the present invention.Please refer to shown in Fig. 7 a, wherein this solar power system is selected the solar power system of a civil power parallel connection type for use, and an I/O port 11 of this three-arm power conversion device 1 is connected to a direct current electric capacity, the 2nd I/O port 12 is connected to a solar battery group of this solar power system, and the 3rd I/O port 13 then is connected to an alternating-current system.Wherein, if this three arms bridge circuit 4 is chosen as this second kind of three arm circuit framework 14b, can omit the dc capacitor that an I/O port 11 is connected, and in the application examples shown in Fig. 7 a, since the transformer among this first kind of uncoupling loop element 16a for direct current energy just as short circuit, so this uncoupling circuit element 16 can only be selected this second kind of uncoupling loop element 16b for use.When three-arm power conversion device 1 of the present invention is operated in the application examples shown in Fig. 7 a, this solar battery group is imported a direct current electric energy to the 2nd I/O port 12, its electric current is an one-in-and-one-out, equal and opposite in direction and phase place is opposite, therefore the first electric current composition by this this two output/input current of end points 143,144 in the middle of two of this three arms bridge circuit 14 of control is the electric current of this solar battery group of may command, and then controls the power that this solar battery group is exported; On the other hand, the second electric current composition of this two output/input current by the middle end points 143,144 of this three arms bridge circuit 14 of control, the electric current that the 3rd end points 163 of this uncoupling loop element 16 of may command is produced and the voltage same frequency and the same-phase of this alternating-current system are injected this alternating-current system through the 3rd I/O port 13 again.In addition, utilize the difference between the AC energy that direct current energy that control imported by the 2nd I/O port 12 and the 3rd I/O port 13 exported, this three arms bridge circuit 14 can be set up a galvanic current and press on the dc capacitor that is connected in an I/O port 11, required direct voltage for should 14 normal runnings of three arm bridge circuits the time.Therefore, three-arm power conversion device 1 of the present invention can be directly converts the direct current energy that solar battery group produced of this solar power system to a high-quality AC energy and injects this alternating-current system.
Please refer to shown in Fig. 7 b, it is applied in the framework of a self solar power system for the preferred embodiment of three-arm power conversion device of the present invention, wherein an I/O port 11 of this three-arm power conversion device 1 is connected to a batteries, the 2nd I/O port 12 is connected to a solar battery group of this solar power system, and the 3rd I/O port 13 then is connected to an ac capacitor and a load.In the application examples shown in Fig. 7 b and since this first kind of uncoupling loop element 16a in transformer for direct current energy just as short circuit, so this uncoupling circuit element 16 also can only be selected this second kind of uncoupling loop element 16b for use.When three-arm power conversion device 1 of the present invention is operated in the application examples shown in Fig. 7 b, this solar battery group is also imported a direct current electric energy to the 2nd I/O port 12, its electric current is an one-in-and-one-out, equal and opposite in direction and phase place is opposite, therefore the first electric current composition by this this two output/input current of end points 143,144 in the middle of two of this three arms bridge circuit 14 of control is the electric current of this solar battery group of may command, and then controls the power that this solar battery group is exported; On the other hand, the second electric current composition by this this two output/input current of end points 143,144 in the middle of two of this three arms bridge circuit 14 of control, the electric current that the 3rd end points 163 of this uncoupling loop element 16 of may command is produced, to set up an alternating voltage being parallel on this ac capacitor of this load, this load is given in power supply.In addition, utilize the difference between the AC energy that direct current energy that these controller 17 controls are imported by the 2nd I/O port 12 and the 3rd I/O port 13 exported, this three arms bridge circuit 14 can discharge and recharge this batteries that is connected in an I/O port 11.Whereby, when sun light intensity, electric energy that this solar battery group produced can be charged into this batteries greater than the part of the required electric energy of this load; And when sunlight is more weak, can be not enough to supply this load required electric energy to supply solar battery group by this batteries discharge.
Please refer to shown in Fig. 7 c, it is applied in another framework of a self solar power system for the preferred embodiment of three-arm power conversion device of the present invention, wherein an I/O port 11 of this three-arm power conversion device 1 is connected to a solar battery group of this solar power system, the 2nd I/O port 12 is connected to a batteries, and the 3rd I/O port 13 is connected to an ac capacitor and a load.In the application examples shown in Fig. 7 c and since this first kind of uncoupling loop element 16a in transformer for direct current energy just as short circuit, so this uncoupling circuit element 16 still can only be selected this second kind of uncoupling loop element 16b for use.When three-arm power conversion device 1 of the present invention is operated in the application examples shown in Fig. 7 c, the first electric current composition by this this two output/input current of end points 143,144 in the middle of two of this three arms bridge circuit 14 of control can carry out charge or discharge to this batteries; And by the second electric current composition of this this two output/input current of end points 143,144 in the middle of two of this three arms bridge circuit 14 of control, the electric current that the 3rd end points 163 of this uncoupling loop element 16 of may command is produced, to set up an alternating voltage being parallel on this ac capacitor of this load, this load is given in power supply.More and, difference between the AC energy that direct current energy of being exported/being imported by the 2nd I/O port 12 by control and the 3rd I/O port 13 are exported, this three arms bridge circuit 14 can determine to be connected in the direct current energy that this solar battery group at an I/O port 11 is exported.Whereby, when sun light intensity, the electric energy that this solar battery group is exported is powered simultaneously and is given this load in order to this battery charging; When a little less than the sunlight, this batteries will be discharged, so that give this load in conjunction with the electric energy power supply of this solar battery group.
Please refer to shown in Figure 8, system architecture diagram when it is applied to UPS for the preferred embodiment of three-arm power conversion device of the present invention, wherein an I/O port 11 of this three-arm power conversion device 1 is connected to an electric capacity, the 2nd I/O port 12 is connected to a batteries, and the 3rd I/O port 13 connects an ac capacitor and a load, and the 3rd I/O port 13 is connected to an AC power by an alternating-current switch group in addition.Wherein, if this three arms bridge circuit 14 is chosen as this second kind of three arm circuit framework 14b, can omit the dc capacitor that an I/O port 11 is connected.In addition, in application examples as shown in Figure 8 since this first kind of uncoupling loop element 16a in transformer for direct current energy just as short circuit, so this uncoupling circuit element 16 can only be selected this second kind of uncoupling loop element 16b for use.In this application examples, when this AC power normal power supply, this alternating-current switch group is closure state, this load is directly by this ac power supply, this two middle end points 143 by this three arms bridge circuit 14 of control, the first electric current composition of this of 144, two output/input currents can charge to this batteries, in addition by this two middle end points 143 of controlling this three arms bridge circuit 14, the electric current that the 3rd end points 163 of second this uncoupling loop element 16 of electric current composition may command of this of 144, two output/input currents is produced is with the AC energy of decision from this AC power input.In addition, utilize the difference between the AC energy that direct current energy that control exported by the 2nd I/O port 12 and the 3rd I/O port 13 imported, this three arms bridge circuit 14 can be set up a galvanic current and press on the dc capacitor that is connected in an I/O port 11, required direct voltage for should 14 normal runnings of three arm bridge circuits the time.On the other hand, when AC power can't normal power supply, this alternating-current switch group is open-circuit condition, two middle end points 143 by this three arms bridge circuit 14 of control, the first electric current composition of this of 144, two output/input currents, this batteries of may command is discharged, and by this two middle end points 143 of controlling this three arms bridge circuit 14, the electric current that the 3rd end points 163 of second this uncoupling loop element 16 of electric current composition may command of this of 144, two output/input currents is produced, to set up an alternating voltage being parallel on this ac capacitor of this load, give this load and avoid outage to continue power supply.More and, difference between the AC energy that direct current energy of being imported by the 2nd I/O port 12 by control and the 3rd I/O port 13 are exported, set up a stable DC voltage on the dc capacitor that this three arms bridge circuit 14 is connected in an I/O port 11, for direct voltage that should 14 normal runnings of three arm bridge circuits.
System architecture when the preferred embodiment that please refer to the three-arm power conversion device of the present invention shown in Fig. 9 a and the 9b is applied in electric governor.Please refer to shown in Fig. 9 a, an I/O port 11 of this three-arm power conversion device 1 is connected to an electric capacity, and the 2nd I/O port 12 is connected to an AC power, and the 3rd I/O port 13 is connected to an ac capacitor and a load.Wherein, if this three arms bridge circuit 14 is chosen as this second kind of three arm circuit framework 14b, can omit the electric capacity that an I/O port 11 is connected.When three-arm power conversion device 1 of the present invention is operated in the application examples shown in Fig. 9 a, this AC power is imported an AC energy to the 2nd I/O port 12, the first electric current composition by this this two output/input current of end points 143,144 in the middle of two of this three arms bridge circuit 4 of control, the input current of this AC power of may command is and the synchronous string ripple of this AC supply voltage electric current, can be tending towards specific work because of; And the electric current that is produced by the 3rd end points 163 of this second this uncoupling loop element 16 of electric current composition may command of this two output/input current of end points 143,144 in the middle of two of this three arms bridge circuit 14 of control, so that set up a high-quality alternating voltage on this ac capacitor of this load being parallel to, and then this load is given in power supply.Wherein, the alternating voltage that builds on this ac capacitor can have different frequency and various amplitude with the voltage of this AC power, is subjected to the influence of this AC power with the voltage that prevents to put on this load.In addition, difference between the AC energy that AC energy of being imported by the 2nd I/O port 12 by control and the 3rd I/O port 13 are exported, this three arms bridge circuit 14 can be set up a stable DC voltage on the dc capacitor that is connected in an I/O port 11, for direct voltage that should 14 normal runnings of three arm bridge circuits.
Please refer to shown in Fig. 9 b, it is applied in another framework of an electric governor for the preferred embodiment of three-arm power conversion device of the present invention, wherein an I/O port 11 of this three-arm power conversion device 1 is connected to a direct current electric capacity, the 2nd I/O port 12 is connected to an ac capacitor and a load, and the 3rd I/O port 13 is connected to an AC power.Wherein, if this three arms bridge circuit 14 is chosen as this second kind of three arm circuit framework 14b, can omit the dc capacitor that an I/O port 11 is connected.In the application examples shown in Fig. 9 b, because it is similar when the operation of this three arms bridge circuit 14 and the application examples shown in its execution graph 9a, the difference place exchanges the former AC power that is connected in the 2nd I/O port 12 mutually with the ac capacitor and the load that are connected in the 3rd I/O port 13, therefore no longer in the back repeated description.
In addition, in above-mentioned each application examples shown in Fig. 8,9a and the 9b, respectively this AC power is preferably the electric energy output end of a city's power distribution system or a generator, and this generator can be selected a diesel engine generator or a wind-driven generator for use.
In sum, three-arm power conversion device 1 of the present invention only has a single electric power converter-this three arms bridge circuit 14, and only need utilize the first electric current composition and the second electric current composition of this two output/input current of middle end points 143,144 of two arms of this controller 17 these three arms bridge circuits 14 of control, can power and can between an I/O port 11, the 2nd I/O port 12 and the 3rd I/O port 13, change, and various circuit that connected according to this I/ O port 11,12,13 respectively and have multiple difference in functionality.Therefore, three-arm power conversion device 1 of the present invention has the advantage of simplifying power circuit and control circuit, and can reach the effect that reduces cost and have bigger use nargin.
Claims (12)
1. three-arm power conversion device is characterized in that comprising:
One first output/input port, it has two end points;
One second output/input port, it has two end points;
One the 3rd output/input port, it has two end points;
One three arm bridge circuit, it has three single armed circuit, two direct current end points and three middle end points, these two direct current end points are connected to these two end points at this first output/input port respectively, and end points is located at the intermediate point of three single armed circuit of this three arms bridge circuit respectively in the middle of these three;
A controller, it electrically connects this three arms bridge circuit, for the control respectively output or the input current of the middle end points of this direct current end points and each arm;
The filter circuit of the high-frequency harmonic electric current that this three arms bridge circuit of filtering is produced, the one end is connected to two middle end points of two single armed circuit of this three arms bridge circuit, and the other end of this filter circuit then is connected to these two end points at this second output/input port; And
A uncoupling loop element, it has one first end points, second end points and one the 3rd end points, this first end points and second end points are connected to these two end points at this second output/input port respectively, and the middle end points of another single armed circuit of the 3rd end points and this three arms bridge circuit of not being connected with this filter circuit then is connected to these two end points at the 3rd output/input port respectively.
2. three-arm power conversion device as claimed in claim 1, it is characterized in that, three these single armed circuit connection parallel with one another that this three arms bridge circuit is comprised, and respectively this single armed circuit all has two groups of electronic power switch elements that are connected in series, wherein respectively the tie point between these two groups of electronic power switch elements of this single armed circuit forms this centre end points, being connected in parallel of respectively this single armed circuit of these three single armed circuit a little then forms this two direct current end points, and this electronic power switch element is respectively organized in this controller connection.
3. three-arm power conversion device as claimed in claim 1, it is characterized in that, these three single armed circuit connections parallel with one another that this three arms bridge circuit is comprised, one of them single armed circuit has the capacitor of two equivalences that are connected in series, two single armed circuit then have two groups of electronic power switch elements that are connected in series in addition, respectively the tie point between two of this single armed circuit groups of electronic power switch elements or two capacitors forms this centre end points, being connected in parallel of these three single armed circuit a little then forms this two direct current end points, and this controller connects respectively this electronic power switch element.
4. three-arm power conversion device as claimed in claim 3, it is characterized in that, the middle end points of single armed circuit with capacitor of these two equivalences is connected to one of them end points at the 3rd output/input port, and the middle end points of two single armed circuit in addition with these two groups of electronic power switch elements then is connected to an end of this filter circuit.
5. three-arm power conversion device as claimed in claim 1, it is characterized in that, this filter circuit has two inductors, and these two inductors are connected between these two end points at two these centre end points of this three arms bridge circuit and this second output/input port, wherein the middle end points of end points for joining with this filter circuit in the middle of these two.
6. three-arm power conversion device as claimed in claim 1, it is characterized in that, this uncoupling loop element comprises a transformer, the primary side of this transformer and the turn ratio of secondary side are 1: 1, and an end of the primary side of this transformer forms this first end points, one end of secondary side forms this second end points, and the primary side of this transformer and the other end of secondary side then interconnect and form the 3rd end points.
7. as claim 1 a described three-arm power conversion device, it is characterized in that, this uncoupling loop element comprises the capacitor of two equivalences, one end of two these capacitors forms this first end points and second end points respectively, and the other end of two these capacitors is interconnected to form the 3rd end points.
8. three-arm power conversion device as claimed in claim 1, it is characterized in that, each single armed circuit of this three arms bridge circuit all has two groups of electronic power switch elements that are connected in series, the electronic power switch element of respectively organizing that this controller utilizes current control mode to control this three arms bridge circuit presents conducting or cut-off state, produce output or input current respectively with this three arms bridge circuit of further control end points in the middle of these two of being connected with this filter circuit, and described two outputs or the input current of end points all comprises one first electric current composition and one second electric current composition in the middle of these two, wherein the pass of these two output or the first electric current composition of input current is an equal and opposite in direction and phase place is opposite, and the pass of the second electric current composition of these two output or input current is that equal and opposite in direction and phase place are identical.
9. three-arm power conversion device as claimed in claim 1, it is characterized in that, a single armed circuit of this three arms bridge circuit has the capacitor of two equivalences that are connected in series, two single armed circuit then have two groups of electronic power switch elements that are connected in series in addition, and the electronic power switch element of respectively organizing that this controller utilizes current control mode to control this three arms bridge circuit presents conducting or cut-off state, produce output or input current respectively with this three arms bridge circuit of further control end points in the middle of these two of being connected with this filter circuit, and described two outputs or the input current of end points all comprises one first electric current composition and one second electric current composition in the middle of these two, wherein the pass of these two output or the first electric current composition of input current is an equal and opposite in direction and phase place is opposite, and the pass of the second electric current composition of these two output or input current is that equal and opposite in direction and phase place are identical.
10. three-arm power conversion device as claimed in claim 8 or 9, it is characterized in that, these two output or the first electric current composition of input current are flowed through circuit that this second output/input port and this second output/input port connected and are formed a current circuit, i.e. one of two first electric current compositions of this output/input current end outflow at this second output/input port certainly, another of two first electric current compositions of this output/input current then flows into the other end at this second output/input port.
11. three-arm power conversion device as claimed in claim 8 or 9, it is characterized in that flow through circuit that this uncoupling loop element, the 3rd output/input port and the 3rd output/input port connected and form a current circuit of the second electric current composition of described two output/input currents.
12. three-arm power conversion device as claimed in claim 8 or 9, it is characterized in that, this controller is controlled described two this output of end points or the first electric current composition and the second electric current composition of input current in the middle of two respectively, controlling the output or the input current at this second output/input port and the 3rd output/input port respectively, and then the control electric energy is changed between this first output/input port, the second output/input port and the 3rd output/input port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100005273A CN101783612B (en) | 2009-01-15 | 2009-01-15 | Three-arm power conversion device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100005273A CN101783612B (en) | 2009-01-15 | 2009-01-15 | Three-arm power conversion device |
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| CN101783612A true CN101783612A (en) | 2010-07-21 |
| CN101783612B CN101783612B (en) | 2012-07-04 |
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| CN2009100005273A Active CN101783612B (en) | 2009-01-15 | 2009-01-15 | Three-arm power conversion device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103312185A (en) * | 2012-03-14 | 2013-09-18 | 台达电子工业股份有限公司 | Power module and power conversion unit |
| TWI744710B (en) * | 2019-10-21 | 2021-11-01 | 國立高雄科技大學 | Battery-less pv generation system and method thereof having functions of grid connection and isolated grid |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09294335A (en) * | 1996-02-26 | 1997-11-11 | Sanyo Electric Co Ltd | System link generator |
| US6462518B1 (en) * | 2001-06-01 | 2002-10-08 | Abb Schweiz Ag | Converter circuit having an inverter for each phase |
| CN1707932A (en) * | 2004-06-08 | 2005-12-14 | 株式会社东芝 | Electric power device for vehicle |
| TWI236792B (en) * | 2004-08-30 | 2005-07-21 | Uis Abler Electronics Co Ltd | Active equipment for harmonic suppression |
| CN100424973C (en) * | 2005-08-04 | 2008-10-08 | 台达电子工业股份有限公司 | Integrated converting means with three-phase activity coefficient adjustment |
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2009
- 2009-01-15 CN CN2009100005273A patent/CN101783612B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103312185A (en) * | 2012-03-14 | 2013-09-18 | 台达电子工业股份有限公司 | Power module and power conversion unit |
| CN103312185B (en) * | 2012-03-14 | 2015-09-02 | 台达电子工业股份有限公司 | Power supply change-over device |
| TWI744710B (en) * | 2019-10-21 | 2021-11-01 | 國立高雄科技大學 | Battery-less pv generation system and method thereof having functions of grid connection and isolated grid |
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| Publication number | Publication date |
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| CN101783612B (en) | 2012-07-04 |
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