CN103427684A - Three-phase rectifier circuit - Google Patents
Three-phase rectifier circuit Download PDFInfo
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- CN103427684A CN103427684A CN2012101491088A CN201210149108A CN103427684A CN 103427684 A CN103427684 A CN 103427684A CN 2012101491088 A CN2012101491088 A CN 2012101491088A CN 201210149108 A CN201210149108 A CN 201210149108A CN 103427684 A CN103427684 A CN 103427684A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention provides a three-phase rectifier circuit. The three-phase rectifier circuit comprises three input ends, two output ends, a three-phase diode bridge, three switching circuit and a voltage source, wherein the three-phase diode bridge is provided with three first diode pairs which are electrically connected to the two output ends in parallel. Each first diode pair comprises two first diodes which are connected in series, and a first node is defined between the two first diodes. Each first diode pair is electrically connected to a corresponding input end at the position of a corresponding first node. Each switching circuit is provided with a first end, a second end and a plurality of switches which are electrically connected between the first end and the second end in series, wherein the first end and the second end are electrically connected to a second node and a third node respectively, and the second node and the third node are located between the two first diodes of a corresponding first diode pair and the two first nodes of the corresponding first diode pair. The voltage source is electrically connected between the two output ends in parallel and is electrically connected to each switching circuit.
Description
Technical field
Generality of the present invention relates to the AC/DC converter circuit, relates in particular to a kind of rectified three-phase circuit, and it utilizes three-phase activity coefficient adjustment (PFC) circuit is DC voltage by the ac input voltage rectification.
Background technology
The AC/DC transducer is for being converted to AC power (AC) signal the electronic installation of direct current (DC) signal.The AC/DC transducer is vital for usining that AC power supplies used as power supply for the electronic equipment (such as computer server or work station) of DC voltage work.In addition, other not only uses AC power supplies but also use rechargeable battery also to need the AC/DC transducer as the electronic equipment of power supply.For example, portable electric appts such as mobile phone and notebook computer can be used the DC power supply of battery supplied when AC power supplies is unavailable, but also can carry out work as power supply and/or be the battery charging by AC power supplies.In this case, must be for the work of portable electric appts or the DC voltage that battery is charged by the AC voltage transitions.
Usually, because converters produces harmonic pollution to electrical network, the AC/DC transducer has been used power factor correction (PFC) circuit.Tradition AC/DC transducer is used single phase system, and it comprises Single-phase PFC circuit, high pressure DC link (link) and DC/DC transducer.The Single-phase PFC circuit is carried out the AC/DC conversion, will be the high voltage DC signal from the AC voltage transitions of AC power supplies, and by high pressure DC link, this high voltage DC signal be sent to the DC/DC transducer.Then, the DC/DC transducer is converted to the required DC voltage of electronic equipment by the high voltage DC signal.Yet the output rated power of single phase system can be restricted.
Along with the demand of the high-output power to the AC/DC transducer day by day increased, the three-phase pfc circuit is widely used in carries out the AC/DC conversion.In actual use, the topology of three-phase pfc circuit can be various circuit layout.On the one hand, always preferably adopt the circuit layout of simple three-phase pfc circuit, but simple circuit layout can cause usually such as relatively low efficiency and the such problem of higher harmonic current.On the other hand, the efficiency that adopts more complicated circuit layout to improve the three-phase pfc circuit will produce different problem in addition, as has increased the complexity of circuit cost and circuit control and reduced AC/DC transducer reliability.
In addition, the three-phase pfc circuit produces higher output dc voltage, usually in the scope of 800V.Thereby, when the AC/DC transducer replaces the Single-phase PFC circuit with the three-phase pfc circuit, the DC/DC transducer need be replaced, to withstand the higher output dc voltage produced by the three-phase pfc circuit.The mode addressed this problem is in the AC/DC transducer, to use high voltage circuit element (as the element of 1200V) to replace the element of 600V.Yet the element of 1200V is commonly used unlike 600 element, thus the AC/DC transducer can increase due to the cost of the element of 1200V spend more.Another kind of mode is to use the element of general 600V and adopt more complicated circuit layout.Yet in this manner, the quantity of circuit element can increase, thereby can become and more be difficult to control.
Therefore, unsolved demand is present in prior art so far, to solve the above-mentioned shortcoming and defect of mentioning.
Summary of the invention
The present invention relates to the rectified three-phase circuit with three inputs and two outputs and comprises three-phase diode bridge and three switching circuits in a scheme.Described three-phase diode bridge has three the first diode pairs that electrically are connected in parallel to described two outputs, wherein each first diode pair has the first diode of two series connection, limit first node between described two the first diodes, and each first diode pair is electrically connected to corresponding input at described first node place.Each switching circuit has first end, the second end and a plurality of switch electrically be connected between described first end and described the second end, and each switching circuit is coupled to corresponding the first diode pair, make described first end be electrically connected to first diode in corresponding the first diode pair and the Section Point between described first node, and make described the second end be electrically connected to another first diode in corresponding the first diode pair and the 3rd node between described first node.In addition, described rectified three-phase circuit can have voltage source, and described voltage source electrically is connected in parallel between described two outputs, and is electrically connected to each switching circuit.In one embodiment, each in a plurality of switches of described three switching circuits comprises MOS switch or IGBT switch.
In addition, described three-phase diode bridge can have three pairs of the second diodes, wherein every pair of second diode has two the second diodes, second diode electrically is connected between the described first node and described Section Point of corresponding the first diode pair, and another second diode electrically is connected between the described first node and described the 3rd node of corresponding the first diode pair.In one embodiment, all first diodes of described three the first diode pairs comprise fast recovery diode, and all second diodes of described three the second diode pairs comprise slow recovery diode.
In one embodiment, described voltage source comprises the polarized capacitor of two series connection, limits the 4th node and each in described the 4th Nodes is electrically connected to described switching circuit of described voltage source between described two polarized capacitors.
And described rectified three-phase circuit can comprise the converter circuit that is electrically connected to described two outputs.This converter circuit also can have a plurality of modules, and each module has the first input, the second input, the first output and the second output.The first input of first module and the second input of last module are electrically connected to respectively described two outputs, the second input of the arbitrary module except last module is electrically connected to the first input of next module of closelying follow thereafter, and the first output of described a plurality of modules and all electrically parallel connections of the second output.In one embodiment, each module has resonance converter.In addition, described resonance converter can have LLC series resonance DC/DC transducer or LLC parallel resonance DC/DC transducer.
In another scheme of the present invention, the rectified three-phase circuit with three inputs and two outputs comprises three-phase diode bridge and three switching circuits.In one embodiment, rectified three-phase circuit has: pfc circuit, and it has one or more input and two outputs that are electrically coupled to AC power supplies; Voltage source, its electric property coupling is between two outputs of described PFC; And a plurality of modules, it is cross-linked and is electrically connected to described voltage source each other.
In one embodiment, described pfc circuit comprises: three-phase diode bridge, it comprises three the first diode pairs that electrically are connected in parallel to two outputs of described pfc circuit, wherein each first diode pair comprises the first diode of two series connection, limit first node between described two the first diodes, and each first diode is electrically connected to the input of corresponding described pfc circuit at described first node place; Three switching circuits, each switching circuit has first end, the second end and a plurality of switch electrically be connected between described first end and described the second end, and each switching circuit is coupled to corresponding the first diode pair, make described first end be electrically connected to first diode in corresponding the first diode pair and the Section Point between described first node, and make described the second end be electrically connected to another first diode in corresponding the first diode pair and the 3rd node between described first node.
In one embodiment, described voltage source comprises one or more polarized capacitors.
In one embodiment, each module has the first input, the second input, the first output and the second output, wherein the second input of first of first module the input and last module is electrically connected to two outputs of described pfc circuit, the second input of the arbitrary module except last module is electrically connected to the first input of next module of closelying follow thereafter, and the first output of described a plurality of modules and all electrically parallel connections of the second output.In one embodiment, each module comprises resonance converter, and wherein said resonance converter comprises LLC series resonance DC/DC transducer or LLC parallel resonance DC/DC transducer.
Although can realize variants and modifications of the present invention in the spirit and scope that do not deviate from novel concept of the present invention, from the following description to preferred embodiment in conjunction with following accompanying drawing, these and other scheme of the present invention will become more obvious.
The accompanying drawing explanation
Accompanying drawing shows one or more embodiment of the present invention, and is used from explaination principle of the present invention with text description one.In the situation that possible, mean embodiment with same reference marker in institute's drawings attached in same or similar element, wherein:
Fig. 1 shows the physical circuit figure of rectified three-phase circuit according to an embodiment of the invention;
Fig. 2 shows the physical circuit figure of rectified three-phase circuit in accordance with another embodiment of the present invention;
Fig. 3 shows the physical circuit figure of the rectified three-phase circuit of another embodiment according to the present invention;
Fig. 4 shows the physical circuit figure of the rectified three-phase circuit of another embodiment according to the present invention;
Fig. 5 shows the schematic diagram of rectified three-phase circuit according to an embodiment of the invention.
Embodiment
Below with reference to accompanying drawings the present invention is described more fully, wherein accompanying drawing shows illustrative examples of the present invention.Yet the present invention can implement in many different forms, and be not interpreted as, is limited to the embodiment that proposed here.Or rather, provide these embodiment so that the disclosure is thoroughly with complete, and scope of the present invention is fully conveyed to those of ordinary skills.Element like similar Reference numeral representation class in full.
Term as used herein is only in order to describe specific embodiment, but not is intended to limit the present invention.As used herein singulative " one ", " one " and " being somebody's turn to do " are intended to also comprise plural form, unless expression clearly separately arranged in literary composition.It is also to be understood that, the term that used in this manual " comprises " and/or " including " or " comprising " and/or " including " or " having " and/or " having " illustrates is the existence of stated feature, zone, integral body (integer), step, operation, element and/or parts, and does not get rid of one or more other existence of feature, zone, integral body, step, operation, element, parts and/or its combination.
Unless otherwise defined, all terms (comprising technical term and scientific terminology) that this paper is used have the meaning identical with the general understanding of one skilled in the art of the present invention.It is also to be understood that, in the general dictionary used, defined those terms should be interpreted as having the meaning with aggregatio mentium in correlation technique and situation of the present invention, and are not interpreted as Utopian or excessive formal meaning, unless this paper defines especially.
As used herein " approximately ", " approximately " or " being similar to " generally mean set-point or scope 20% in, preferably set-point or scope 10% in, more preferably set-point or scope 5% in.Quantity given in this article is similar to, and means that if special declaration not, deducibility goes out the meaning of term " approximately ", " approximately " or " being similar to ".
In conjunction with the accompanying drawing of Fig. 1-Fig. 5, embodiments of the invention are made to description.According to purpose of the present invention, as concrete as this paper institute and generality is described, and the present invention relates to a kind of rectified three-phase circuit in a scheme.In one embodiment, this rectified three-phase circuit is the three-phase pfc circuit.Fig. 1 to Fig. 4 shows respectively according to the rectified three-phase circuit 100,200,300 of different embodiments of the invention and four physical circuits of 400.As shown in Figure 1, rectified three-phase circuit 100 has 122,124 and 126 and two outputs 132 and 134 of three inputs.These three inputs 122,124 and 126 can be the AC input, and each has inductance L
1, L
2Or L
3.These two outputs 132 and 134 can be the DC output.In addition, rectified three-phase circuit 100 has three-phase diode bridge 110, voltage source 140 and three switching circuits 150.Three-phase diode bridge 110 shown in Fig. 1 is bridge rectifier, more specifically, is three-phase Vienna pfc circuit.And this three-phase diode bridge 110 has three pairs of the first diode pairs 112,114 and 116 that electrically are connected in parallel to two outputs 132 and 134.
The first diode pair 112 comprises the first diode D of series connection
1And D
2, the first diode D
1And D
2Between limit first node N
1, and at first node N
1Place is electrically connected to corresponding input 122.Similarly, the first diode pair 114 comprises the first diode D of series connection
3And D
4, the first diode D
3And D
4Between limit first node N
2, and at first node N
2Place is electrically connected to corresponding input 124.The first diode pair 116 comprises the first diode D of series connection
5And D
6, the first diode D
5And D
6Between limit first node N
3, and at first node N
3Place is electrically connected to corresponding input 126.Preferably, three the first diode pairs 112,114 and all diode D of 116
1, D
2, D
3, D
4, D
5And D
6Comprise fast recovery diode.
Three switching circuits 150 comprise switching circuit 152,154 and 156.Switching circuit 152 has first end, the second end and a plurality of switch Q electrically be connected between first end and the second end
1And Q
2, and be coupled to corresponding the first diode pair 112, make the first end of switching circuit 152 be electrically connected to and be positioned at first node N
1With first a diode D in corresponding the first diode pair 112
1Between Section Point N
11, and make the second end of switching circuit 152 be electrically connected to be positioned at first node N
1With another the first diode D in corresponding the first diode pair 112
2Between the 3rd node N
12.Similarly, switching circuit 154 also has first end, the second end and a plurality of switch Q electrically be connected between first end and the second end
3And Q
4, and be coupled to corresponding the first diode pair 114, make the first end of switching circuit 154 be electrically connected to and be positioned at first node N
2With first a diode D in corresponding the first diode pair 114
3Between Section Point N
21, and make the second end of switching circuit 154 be electrically connected to be positioned at first node N
2With another the first diode D in corresponding the first diode pair 114
4Between the 3rd node N
22.Switching circuit 156 also has first end, the second end and a plurality of switch Q electrically be connected between first end and the second end
5And Q
6, and be coupled to corresponding the first diode pair 116, make the first end of switching circuit 156 be electrically connected to and be positioned at first node N
3With first a diode D in corresponding the first diode pair 116
5Between Section Point N
31, and make the second end of switching circuit 156 be electrically connected to be positioned at first node N
3With another the first diode D in corresponding the first diode pair 116
6Between the 3rd node N
32.In Fig. 1, three switching circuits 152,154 and all switch Q of 156
1, Q
2, Q
3, Q
4, Q
5And Q
6Comprise the MOS switch.
According to the embodiment shown in Fig. 1, rectified three-phase circuit 100 is only used six diodes (three the first diode pairs 112,114 and the first diode D of 116
1, D
2, D
3, D
4, D
5And D
6) and six MOS switches (three switching circuits 152,154 and 156 switch Q
1, Q
2, Q
3, Q
4, Q
5And Q
6).Thereby in rectified three-phase circuit 100, required circuit element can be less than required circuit element in traditional three-phase pfc circuit.
Fig. 2 shows the physical circuit figure of rectified three-phase circuit 200 according to another embodiment of the invention, and it is same as the rectified three-phase circuit 100 in Fig. 1 in essence, thereby with similarly digital, all elements is carried out to label.For example, as shown in Figure 2, rectified three-phase circuit 200 has 222,224 and 226 and two outputs 232 and 234 of three inputs.In addition, rectified three-phase circuit 200 has three-phase diode bridge 210, voltage source 240 and three switching circuits 250.And three-phase diode bridge 210 has three 212,214 and 216, three switching circuits 250 of the first diode pair that electrically are connected in parallel to two outputs 232 and 234 and comprises switching circuit 252,254 and 256.Embodiment in Fig. 2 and the difference of the embodiment in Fig. 1 are, three switching circuits 252,254 in Fig. 2 and all switch Q of 256
1, Q
2, Q
3, Q
4, Q
5And Q
6Comprise the IGBT switch.Other element and the characteristics of embodiment in Fig. 2 are same as the embodiment in Fig. 1 in essence, therefore will omit its detailed description.
According to the embodiment shown in Fig. 2, rectified three-phase circuit 200 is only used six diodes (three the first diode pairs 212,214 and the first diode D of 216
1, D
2, D
3, D
4, D
5And D
6) and six IGBT switches (three switching circuits 252,254 and 256 switch Q
1, Q
2, Q
3, Q
4, Q
5And Q
6).Thereby in rectified three-phase circuit 200, required circuit element can be less than required circuit element in traditional three-phase pfc circuit.
Fig. 3 shows the physical circuit figure of the rectified three-phase circuit 300 of another embodiment according to the present invention, and it is similar to the rectified three-phase circuit 100 in Fig. 1, thereby with similarly digital, all elements is carried out to label.For example, as shown in Figure 3, rectified three-phase circuit 300 has 322,324 and 326 and two outputs 332 and 334 of three inputs.In addition, rectified three-phase circuit 300 has three-phase diode bridge 310, voltage source 340 and three switching circuits 350.And three-phase diode bridge 310 has three 312,314 and 316, three switching circuits 350 of the first diode pair that electrically are connected in parallel to two outputs 332 and 334 and comprises switching circuit 352,354 and 356.Embodiment in Fig. 3 part unlike the embodiment of FIG. 1 is, three-phase diode bridge 310 also comprises three the second diode pairs 362,364 and 366.The second diode pair 362 comprises two the second diode D
A0And D
A1, second a diode D
A0Be electrically connected at the first node N of corresponding the first diode pair 312
1With Section Point N
11Between, another second diode D
A1Be electrically connected at the first node N of corresponding the first diode pair 312
1With the 3rd node N
12Between.Similarly, the second diode pair 364 comprises two the second diode D
B0And D
B1, second a diode D
B0Be electrically connected at the first node N of corresponding the first diode pair 314
2With Section Point N
21Between, and another second diode D
B1Be electrically connected at the first node N of corresponding the first diode pair 314
2With the 3rd node N
22Between.The second diode pair 366 comprises two the second diode D
C0And D
C1, second a diode D
C0Be electrically connected at the first node N of corresponding the first diode pair 316
3With Section Point N
31Between, and another second diode D
C1Be electrically connected at the first node N of corresponding the first diode pair 316
3With the 3rd node N
32Between.Preferably, three the first diode pairs 312,314 and all the first diode D of 316
1, D
2, D
3, D
4, D
5And D
6Comprise fast recovery diode, and all second diode D of three the second diode pairs 362,364 and 366
A0, D
A1, D
B0, D
B1, D
C0And D
C1Comprise slow recovery diode.
According to the embodiment in Fig. 3, rectified three-phase circuit 300 is used 12 diodes (three the first diode pairs 312,314 and the first diode D of 316
1, D
2, D
3, D
4, D
5And D
6, and the second diode D of three the second diode pairs 362,364 and 366
A0, D
A1, D
B0, D
B1, D
C0And D
C1) and six MOS switches (three switching circuits 352,354 and 356 switch Q
1, Q
2, Q
3, Q
4, Q
5And Q
6), this is more than six diodes and six switches that use in Fig. 1.Yet required whole circuit element still can be less than the required circuit element of traditional three-phase pfc circuit in rectified three-phase circuit 300.And three the second diode pairs 362,364 of increase and 366 allow rectified three-phase circuits 300 to utilize the normal voltage circuit element, as the element of the 600V that generally uses, but not be the element of high-tension 1200V.Thereby rectified three-phase circuit 300 circuit element is cheaply realized high efficiency.
Fig. 4 shows the physical circuit figure of the rectified three-phase circuit 400 of another embodiment according to the present invention, and it is same as the rectified three-phase circuit 300 in Fig. 3 in essence, thereby with similarly digital, all elements is carried out to label.For example, as shown in Figure 4, rectified three-phase circuit 400 has 422,424 and 426 and two outputs 432 and 434 of three inputs.In addition, rectified three-phase circuit 400 has three-phase diode bridge 410, voltage source 440 and three switching circuits 450.And three-phase diode bridge 410 has three the first diode pairs 412,414 and 416 that electrically are connected in parallel to two outputs 432 and 434, and three switching circuits 450 comprise switching circuit 452,454 and 456.Three-phase diode bridge 410 also comprises three the second diode pairs 462,464 and 466.Embodiment in Fig. 4 and the embodiment difference in Fig. 3 are, three switching circuits 452,454 in Fig. 4 and all switch Q of 456
1, Q
2, Q
3, Q
4, Q
5And Q
6Comprise insulated gate bipolar transistor (IGBT) switch.Other element and the characteristics of embodiment in Fig. 4 are same as the embodiment in Fig. 3 in essence, therefore will omit its detailed description.
According to the embodiment shown in Fig. 4, rectified three-phase circuit 400 is used 12 diodes (three the first diode pairs 412,414 and the first diode D of 416
1, D
2, D
3, D
4, D
5And D
6, and the second diode D of three the second diode pairs 462,464 and 466
A0, D
A1, D
B0, D
B1, D
C0And D
C1) and six IGBT switches (three switching circuits 452,454 and 456 switch Q
1, Q
2, Q
3, Q
4, Q
5And Q
6), this is more than six diodes and six switches that use in Fig. 2.Yet required whole circuit element still can be less than the required circuit element of traditional three-phase pfc circuit in rectified three-phase circuit 400.And three the second diode pairs 462,464 of increase and 466 allow rectified three-phase circuits 400 to utilize the normal voltage circuit element, as the element of the 600V that generally uses, but not be the element of high-tension 1200V.Thereby rectified three-phase circuit 400 circuit element is cheaply realized high efficiency.
According to the embodiment shown in Fig. 1-Fig. 4, rectified three-phase circuit of the present invention can keep simple circuit layout, and need not reduce the efficiency of transducer or improve harmonic current.In addition, in this rectified three-phase circuit, the total quantity of the required circuit element circuit element total quantity required with traditional three-phase pfc circuit compared and can be lowered.Thereby the complexity that circuit cost and circuit are controlled can be relatively low, and can keep the reliability of this rectified three-phase circuit.
Fig. 5 shows the schematic diagram of rectified three-phase circuit 500 according to an embodiment of the invention.As shown in Figure 5, rectified three-phase circuit 500 has AC/DC rectification circuit 502 and converter circuit 600.This AC/DC rectification circuit 502 can be any one in the rectified three-phase circuit 100-400 of the embodiment shown in Fig. 1-Fig. 4 in essence, or is any other embodiment or the realization of rectified three-phase circuit of the present invention.In Fig. 5, AC/DC rectification circuit 502 has three-phase pfc circuit 510 and voltage source 540.Three-phase pfc circuit 510 is used as three-phase diode bridge of the present invention, and has two outputs 532 and 534.Output 532 and 534 is electrically coupled to converter circuit 600 via high pressure DC link or DC bus.Other details of three of not shown connection three-phase diode bridge switching circuits and three-phase pfc circuit 510 in Fig. 5, and three inputs of three-phase diode bridge are illustrated with schematic AC input.Voltage source 540 in illustrative examples shown in Fig. 5 comprises the polarized capacitor of two series connection.Voltage source 540 also can be formed as energy storage capacitor by the capacitor of other type.
Converter circuit 600 is essentially the DC/DC transducer, and it is electrically connected to the output 532 and 534 of three-phase pfc circuit 510.According to the present invention, converter circuit 600 comprises a plurality of modules, and each module has the first input, the second input, the first output and the second output.Particularly, the converter circuit in Fig. 5 600 comprises two DC/DC transducers 610 and 620.The one DC/DC transducer 610 has the first input I
11, second the input I
12, first output O
11And second output O
12.Similarly, the 2nd DC/DC transducer 620 has the first input I
21, second the input I
22, first output O
21And second output O
22.All first output O of DC/DC transducer
11, second output O
12, first output O
21And second output O
22All electrically be connected in parallel to DC output.
According to the present invention, the first input of first module and the second input of last module are electrically connected to respectively output, and the second input of the arbitrary module except last module is electrically connected to the first input of next module of closelying follow thereafter.In the illustrative examples shown in Fig. 5, first module of DC/DC transducer 610() the first input I
11With the 2nd last module of DC/DC transducer 620() second the input I
22Be electrically connected to respectively the output 532 and 534 of three-phase pfc circuit 510.The arbitrary module of the one DC/DC transducer 610(except last module) the second input I
12Be electrically connected to the next module immediately of the 2nd DC/DC transducer 620(the one DC/DC transducer 610 modules) first the input I
21.
Those of ordinary skills it will be appreciated that, in converter circuit, these modules can be resonance converter, and resonance converter can comprise LLC series resonance DC/DC transducer or LLC parallel resonance DC/DC transducer, or the resonance converter circuit of other any type or configuration.In addition, converter circuit can comprise more than two resonance converters, or the module of other type.
In a word, except other, the present invention has described the rectified three-phase circuit with three inputs and two outputs in detail.This rectified three-phase circuit comprises: three-phase diode bridge, it has three the first diode pairs that electrically are connected in parallel to these two outputs, wherein each first diode pair comprises the first diode of two series connection, limit first node between these two first diodes, and each first diode pair is electrically connected to corresponding first input end at the first node place; And three switching circuits, each switching circuit has first end, the second end and a plurality of switch electrically be connected between first end and the second end, and each switching circuit is coupled to corresponding the first diode pair, make this first end be electrically connected to first diode in corresponding the first diode pair and the Section Point between first node, and make this second end be electrically connected to another first diode in corresponding the first diode pair and the 3rd node between first node.In a scheme, rectified three-phase circuit also comprises voltage source, and this voltage source electrically is connected in parallel between two inputs, and is electrically connected to each switching circuit.In another scheme, three-phase diode bridge also comprises three the second diode pairs, wherein each second diode pair comprises two the second diodes, second diode electrically is connected between the first node and Section Point of corresponding the first diode pair, and another second diode electrically is connected between the first node and the 3rd node of corresponding the first diode pair.
The aforementioned description that proposes illustrative examples of the present invention is only in order to explain and illustration purpose, but not is intended to limit or limits the invention to disclosed precise forms.Under the enlightenment of above-mentioned instruction, many corrections and modification are all possible.
Embodiments of the invention are selected and be described to explain principle of the present invention and the application of its practicality, so that excite others skilled in the art to utilize the present invention and various embodiment, and utilize the various modification that are suitable for the particular desired use.For those of ordinary skills, alternate embodiments will be apparent, and not deviate from the spirit and scope of the present invention.Therefore, by claims rather than above-mentioned specification and wherein described example embodiment limit scope of the present invention.
Claims (16)
1. a rectified three-phase circuit, have three inputs and two outputs, and described rectified three-phase circuit comprises:
(a) three-phase diode bridge, comprise three the first diode pairs that electrically are connected in parallel to described two outputs, wherein each first diode pair comprises the first diode of two series connection, limit first node between described two the first diodes, and each first diode pair is electrically connected to corresponding input at described first node place;
(b) three switching circuits, each switching circuit has first end, the second end and a plurality of switch electrically be connected between described first end and described the second end, and each switching circuit is coupled to corresponding the first diode pair, make described first end be electrically connected to first diode in corresponding the first diode pair and the Section Point between described first node, and make described the second end be electrically connected to another first diode in corresponding the first diode pair and the 3rd node between described first node.
2. rectified three-phase circuit according to claim 1, also comprise voltage source, and described voltage source electrically is connected in parallel between described two outputs, and is electrically connected to each switching circuit.
3. rectified three-phase circuit according to claim 1 and 2, all first diodes of wherein said three the first diode pairs comprise fast recovery diode.
4. rectified three-phase circuit according to claim 1 and 2, wherein said three-phase diode bridge also comprises three pairs of the second diodes, wherein every pair of second diode comprises two the second diodes, second diode electrically is connected between the described first node and described Section Point of corresponding the first diode pair, and another second diode electrically is connected between the described first node and described the 3rd node of corresponding the first diode pair.
5. rectified three-phase circuit according to claim 4, all first diodes of wherein said three the first diode pairs comprise fast recovery diode, and all second diodes of described three the second diode pairs comprise slow recovery diode.
6. rectified three-phase circuit according to claim 1 and 2, each in a plurality of switches of wherein said three switching circuits comprises metal oxide semiconductor switch or insulated gate bipolar transistor switch.
7. rectified three-phase circuit according to claim 2, wherein said voltage source comprises the polarized capacitor of two series connection, limit the 4th node between described two polarized capacitors, and each in described the 4th Nodes is electrically connected to described switching circuit of described voltage source.
8. rectified three-phase circuit according to claim 1 and 2, also comprise a plurality of modules, each module has the first input, the second input, the first output and the second output, wherein the second input of first of first module the input and last module is electrically connected to respectively described two outputs, the second input of the arbitrary module except last module is electrically connected to the first input of next module of closelying follow thereafter, and the first output of described a plurality of modules and all electrically parallel connections of the second output.
9. rectified three-phase circuit according to claim 8, each in wherein said a plurality of modules comprises resonance converter.
10. rectified three-phase circuit according to claim 9, wherein said resonance converter comprises LLC series resonance DC/DC transducer or LLC parallel resonance DC/DC transducer.
11. a rectified three-phase circuit comprises:
(a) power factor correction pfc circuit, have one or more input and two outputs that are electrically coupled to AC power supplies;
(b) voltage source, electric property coupling is between two outputs of described PFC; And
(c) a plurality of modules, be cross-linked and be electrically connected to described voltage source each other.
12. rectified three-phase circuit according to claim 11, wherein said pfc circuit comprises:
(a) three-phase diode bridge, comprise three the first diode pairs that electrically are connected in parallel to two outputs of described pfc circuit, wherein each first diode pair comprises the first diode of two series connection, limit first node between described two the first diodes, and each first diode is electrically connected to the input of corresponding described pfc circuit at described first node place;
(b) three switching circuits, each switching circuit has first end, the second end and a plurality of switch electrically be connected between described first end and described the second end, and each switching circuit is coupled to corresponding the first diode pair, make described first end be electrically connected to first diode in corresponding the first diode pair and the Section Point between described first node, and make described the second end be electrically connected to another first diode in corresponding the first diode pair and the 3rd node between described first node.
13. rectified three-phase circuit according to claim 11, wherein said voltage source comprises one or more polarized capacitors.
14. rectified three-phase circuit according to claim 11, wherein each module has the first input, the second input, the first output and the second output, wherein the second input of first of first module the input and last module is electrically connected to the output of described pfc circuit, the second input of the arbitrary module except last module is electrically connected to the first input of next module of closelying follow thereafter, and the first output of described a plurality of modules and all electrically parallel connections of the second output.
15. rectified three-phase circuit according to claim 14, each in wherein said a plurality of modules comprises resonance converter.
16. rectified three-phase circuit according to claim 15, wherein said resonance converter comprises LLC series resonance DC/DC transducer or LLC parallel resonance DC/DC transducer.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101491088A CN103427684A (en) | 2012-05-14 | 2012-05-14 | Three-phase rectifier circuit |
| US13/544,695 US20120268976A1 (en) | 2009-02-27 | 2012-07-09 | Three-phase rectifier circuit |
| TW101133395A TW201347375A (en) | 2012-05-14 | 2012-09-12 | Three-phase rectifier circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101491088A CN103427684A (en) | 2012-05-14 | 2012-05-14 | Three-phase rectifier circuit |
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| CN103427684A true CN103427684A (en) | 2013-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012101491088A Pending CN103427684A (en) | 2009-02-27 | 2012-05-14 | Three-phase rectifier circuit |
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| CN (1) | CN103427684A (en) |
| TW (1) | TW201347375A (en) |
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| CN103986354B (en) | 2014-05-23 | 2016-10-12 | 台达电子企业管理（上海）有限公司 | Three-level rectifier |
| CN107612304B (en) * | 2017-09-06 | 2019-07-16 | 湖北工业大学 | Single-phase five-level boost power factor correction converter |
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| TW201347375A (en) | 2013-11-16 |
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