阅读说明：本技术 一种基于交错并联的改进型三相混合整流器 (A kind of improved three-phase mixed-rectification device based on crisscross parallel ) 是由 颜景斌 赵耀 李森铎 于 2019-10-09 设计创作，主要内容包括：本发明提供了一种基于交错并联的改进型三相混合整流器,包括整流桥Q、输入滤波电路E、谐波注入电路B、DC-DC Buck斩波器、交错并联电路P、负载R<Sub>0</Sub>,与传统的三相整流器相比,提高了输入电流谐波率,具有很高的电压增益和良好的电压调整率,并通过增加交错并联组成双通道,使得整流器具有更低的开关应力、更大的输出功率和更小的电流纹波,进一步提升整流器的效率和功率密度,应用前景非常广泛。(The present invention provides a kind of improved three-phase mixed-rectification device based on crisscross parallel, including rectifier bridge Q, input filter circuit E, harmonic injection circuit B, DC-DC Buck chopper, crisscross parallel circuit P, load R 0 Compared with traditional three-phase rectifier, improve Harmonics of Input rate, with very high voltage gain and good voltage regulation factor, and binary channels is formed by increasing crisscross parallel, so that rectifier has lower switch stress, bigger output power and smaller current ripples, the efficiency and power density of rectifier are further promoted, application prospect is very extensive.)

1. a kind of improved three-phase mixed-rectification device based on crisscross parallel according to claim 1, it is characterised in that: packet Rectifier bridge Q, input filter circuit E are included, the harmonic injection circuit B being made of 6 diodes and 6 IGBT, by first switch tube (T₁), second switch (T₂), the first inductance (L₁), the second inductance (L₂), first diode (D₁), the second diode (D₂) and electricity The DC-DC Buck chopper concatenated up and down for holding (C) composition, by first switch tube (Q₁), second switch (Q₂), third switch Manage (Q₃), the 4th switching tube (Q₄), the 5th switching tube (Q₅), the 6th switching tube (Q₆), the 7th switching tube (Q₇), the 8th switching tube (Q₈), the first inductance (L_m1), the second inductance (L_m2) and capacitor (C_o) composition crisscross parallel circuit P, load R₀。

2. a kind of improved three-phase mixed-rectification device based on crisscross parallel according to claim 1, it is characterised in that packet Include: rectifier bridge Q, the harmonic injection circuit B being made of 6 diodes and 6 IGBT, wherein connection type is the first IGBT(S_x1) Emitter and the 2nd IGBT(S_x2) collector connection, first diode (D_x1) anode and the second diode (D_x2) sun Pole connection, the first IGBT(S_x1) collector and first diode (D_x1) cathode connection, the 2nd IGBT(S_x2) collector with Second diode (D_x2) cathode connection；3rd IGBT(S_y1) emitter and the 4th IGBT(S_y2) collector connection, third Diode (D_y1) anode and the 4th diode (D_y2) anode connection, the 3rd IGBT(S_y1) collector and third diode (D_y1) cathode connection, the 4th IGBT(S_y2) collector and the 4th diode (D_y2) cathode connection；5th IGBT(S_z1) Emitter and the 6th IGBT(S_z2) collector connection, the 5th diode (D_z1) anode and the 6th diode (D_z2) anode Connection, the 5th IGBT(S_z1) collector and the 5th diode (D_z1) cathode connection, the 6th IGBT(S_z2) collector and Six diode (D_z2) cathode connection；7th diode (D₁) anode and the 8th diode (D₂) cathode connection；Seven or two Pole pipe (D₁) anode and the second diode (D_x2) cathode, the 4th diode (D_y2) cathode, the 6th diode (D_z2) yin Pole connection.

3. a kind of improved three-phase mixed-rectification device based on crisscross parallel according to claim 2, it is characterised in that institute The DC-DC Buck circuit stated is by first switch tube (T₁), second switch (T₂), the first inductance (L₁), the second inductance (L₂), Seven diode (D₁), the 8th diode (D₂) and capacitor (C) composition；First switch tube (T₁) collector and rectifier bridge (Q) be total to Cathode connection；Second switch (T₂) emitter connect with the common-anode of rectifier bridge (Q)；First inductance (L₁) one end and the One switching tube (T₁) emitter, the 7th diode (D₁) cathode connection；First inductance (L₁) the other end and first capacitor (C) it connects；The other end of first capacitor (C) and the second inductance (L₂) one end connection；Second inductance (L₂) the other end and the 8th Diode (D₂) anode, second switch (T₂) collector connection.

4. a kind of improved three-phase mixed-rectification device based on crisscross parallel according to claim 3, it is characterised in that institute The crisscross parallel circuit stated is by first switch tube (Q₁), second switch (Q₂), third switching tube (Q₃), the 4th switching tube (Q₄), 5th switching tube (Q₅), the 6th switching tube (Q₆), the 7th switching tube (Q₇), the 8th switching tube (Q₈), the first inductance (L_m1), second Inductance (L_m2) and capacitor (C_o) constitute；First inductance (L₁) one end respectively with one end of first capacitor (C), capacitor (C_o) one End, first switch tube (Q₁), third switching tube (Q₃), the 5th switching tube (Q₅), the 7th switching tube (Q₇) drain connection；Second Inductance (L₂) one end respectively with the other end of first capacitor (C), capacitor (C_o) the other end and second switch (Q₂), the 4th Switching tube (Q₄), the 6th switching tube (Q₆), the 8th switching tube (Q₈) source level connection；First inductance (L_m1) one end opened with first Close pipe (Q₁) source level, second switch (Q₂) drain connection, the first inductance (L_m1) the other end and third switching tube (Q₃) Source level, the 4th switching tube (Q₄) drain connection；Second inductance (L_m2) one end and the 5th switching tube (Q₅) source level, the 6th open Close pipe (Q₆) drain connection, the second inductance (L_m2) the other end and the 7th switching tube (Q₇) source level, the 8th switching tube (Q₈) Drain connection.

Technical field

The present invention relates to field of power electronics, and in particular to a kind of improved three-phase mixed-rectification based on crisscross parallel Device.

Background technique

In recent years, power semiconductor and control technology are rapidly progressed, and obtained in field of power electronics General application, with the continuous innovation of technology, various power electronic equipments come into being.Rectifier is a kind of to be opened using power electronics The device that AC energy is converted into direct current is closed, the direct current energy that people need to utilize AC energy can be converted to, with The development of commutation technique, made great progress in some key technology areas, but traditional rectification circuit has very More disadvantages.

With the continuous development of power electronic equipment, to the harmonic wave control in power grid, higher requirements are also raised.For The diode of traditional single phase can not be for control rectifying circuit, and ac-side current contains a large amount of harmonic waves, leads to the power factor of circuit Not high, efficiency is also relatively low, due to these there are the shortcomings that, have been unable to meet the demand of high power quality.

PFC (PFC) technology is a kind of effective harmonics restraint means.Traditional three-phase PFC rectifier is general Using booster type circuit, but its output voltage is high, requires height to the voltage stress of device for power switching, is unfavorable for late-class circuit. Voltage-dropping type PFC rectifier unit is small in size, and power density is increasing, there is faster dynamic response, and reliability also obtains very big Promotion, while current distortion rate is small, and power factor is high, has surge current protection, improves now with to power consumption requirements, should Class circuit more and more attention has been paid to.

As the development of commutation technique is swift and violent, traditional rectifier topology has been unable to meet requirement.Therefore, power factor school Positive grade is even not perfect, and total harmonic distortion factor is high, and output effect is undesirable, and the research for novel rectifying device is increasingly becoming Trend has very high voltage gain and good voltage tune while novel rectifying device must assure that unity power factor operation Whole rate has lower switch stress, bigger output power and smaller current ripples.

Summary of the invention

In view of the deficiency of the prior art, it is whole to provide a kind of improved three-phase mixing based on crisscross parallel by the present invention Flowing device has lower switch stress, bigger output power and more while this circuit can be with the operation of guarantor unit's power factor Small current ripples.The embodiment of the present invention adopts the following technical scheme that, specific as follows:

The present invention provides a kind of improved three-phase mixed-rectification device based on crisscross parallel, including rectifier bridge Q, input filter Wave circuit E, the harmonic injection circuit B being made of 6 diodes and 6 IGBT, by first switch tube (T₁), second switch (T₂), the first inductance (L₁), the second inductance (L₂), first diode (D₁), the second diode (D₂) and capacitor (C) composition up and down The DC-DC Buck chopper of concatenation, by first switch tube (Q₁), second switch (Q₂), third switching tube (Q₃), the 4th switch Manage (Q₄), the 5th switching tube (Q₅), the 6th switching tube (Q₆), the 7th switching tube (Q₇), the 8th switching tube (Q₈), the first inductance (L_m1), the second inductance (L_m2) and capacitor (C_o) composition crisscross parallel circuit P, load R₀。

According to a kind of improved three-phase mixed-rectification device based on crisscross parallel, characterized by comprising: rectification Bridge Q, the harmonic injection circuit B being made of 6 diodes and 6 IGBT, wherein connection type is the first IGBT (S_x1) transmitting Pole and the 2nd IGBT (S_x2) collector connection, first diode (D_x1) anode and the second diode (D_x2) anode connection, First IGBT (S_x1) collector and first diode (D_x1) cathode connection, the 2nd IGBT (S_x2) collector and the two or two Pole pipe (D_x2) cathode connection；3rd IGBT (S_y1) emitter and the 4th IGBT (S_y2) collector connection, third diode (D_y1) anode and the 4th diode (D_y2) anode connection, the 3rd IGBT (S_y1) collector and third diode (D_y1) Cathode connection, the 4th IGBT (S_y2) collector and the 4th diode (D_y2) cathode connection；5th IGBT (S_z1) emitter With the 6th IGBT (S_z2) collector connection, the 5th diode (D_z1) anode and the 6th diode (D_z2) anode connection, the Five IGBT (S_z1) collector and the 5th diode (D_z1) cathode connection, the 6th IGBT (S_z2) collector and the six or two pole Manage (D_z2) cathode connection；7th diode (D₁) anode and the 8th diode (D₂) cathode connection；7th diode (D₁) Anode and the second diode (D_x2) cathode, the 4th diode (D_y2) cathode, the 6th diode (D_z2) cathode connection.

According to a kind of improved three-phase mixed-rectification device based on crisscross parallel, it is characterised in that the DC- DC Buck circuit is by first switch tube (T₁), second switch (T₂), the first inductance (L₁), the second inductance (L₂), the seven or two pole Manage (D₁), the 8th diode (D₂) and capacitor (C) composition；First switch tube (T₁) collector and rectifier bridge (Q) common cathode connect It connects；Second switch (T₂) emitter connect with the common-anode of rectifier bridge (Q)；First inductance (L₁) one end and first switch Manage (T₁) emitter, the 7th diode (D₁) cathode connection；First inductance (L₁) the other end connect with first capacitor (C)； The other end of first capacitor (C) and the second inductance (L₂) one end connection；Second inductance (L₂) the other end and the 8th diode (D₂) anode, second switch (T₂) collector connection.

According to a kind of improved three-phase mixed-rectification device based on crisscross parallel, it is characterised in that described interlocks Parallel circuit is by first switch tube (Q₁), second switch (Q₂), third switching tube (Q₃), the 4th switching tube (Q₄), the 5th switch Manage (Q₅), the 6th switching tube (Q₆), the 7th switching tube (Q₇), the 8th switching tube (Q₈), the first inductance (L_m1), the second inductance (L_m2) With capacitor (C_o) constitute；First inductance (L₁) one end respectively with one end of first capacitor (C), capacitor (C_o) one end, first open Close pipe (Q₁), third switching tube (Q₃), the 5th switching tube (Q₅), the 7th switching tube (Q₇) drain connection；Second inductance (L₂) One end respectively with the other end of first capacitor (C), capacitor (C_o) the other end and second switch (Q₂), the 4th switching tube (Q₄)、 6th switching tube (Q₆), the 8th switching tube (Q₈) source level connection；First inductance (L_m1) one end and first switch tube (Q₁) source Grade, second switch (Q₂) drain connection, the first inductance (L_m1) the other end and third switching tube (Q₃) source level, the 4th open Close pipe (Q₄) drain connection；Second inductance (L_m2) one end and the 5th switching tube (Q₅) source level, the 6th switching tube (Q₆) leakage Grade connection, the second inductance (L_m2) the other end and the 7th switching tube (Q₇) source level, the 8th switching tube (Q₈) drain connection.

Preferably, a kind of improved three-phase mixed-rectification device based on crisscross parallel, it is characterised in that the rectification Bridge Q and the DC-DC Buck chopper can be by controlling first switch tube (T₁), second switch (T₂), realize rectification function, Using high-frequency PWM modulation technique, since the state that turns on and off of device can control, the advantages of this circuit is available With the input current of input voltage same-phase, that is, input power factor be 1, the harmonic content of input current can be close to for Zero.

Preferably, a kind of improved three-phase mixed-rectification device based on crisscross parallel, it is characterised in that described to interlock Parallel circuit can be by controlling first switch tube (Q₁), second switch (Q₂), third switching tube (Q₃), the 4th switching tube (Q₄)、 5th switching tube (Q₅), the 6th switching tube (Q₆), the 7th switching tube (Q₇), the 8th switching tube (Q₈) realize output voltage lifting, Output voltage range is wide, has very high voltage regulation factor and load regulation, and by by current phase staggered superposition, can Output current ripple is effectively reduced.

The invention has the following beneficial effects: being run using unity power factor after the technical solution, is able to achieve, full voltage model Enclose it is adjustable, and by increase crisscross parallel form binary channels so that rectifier have lower switch stress, bigger output work Rate and smaller current ripples further promote the efficiency and power density of rectifier, and reliability greatly improves, and have great Theoretical and realistic meaning.

Detailed description of the invention

Illustrate the embodiment of the present invention or technical solution in the prior art in order to clearer, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it is clear that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with It obtains other drawings based on these drawings:

Fig. 1 is a kind of structure chart of improved three-phase mixed-rectification device based on crisscross parallel.

Fig. 2 is the equivalent electricity that improved three-phase mixed-rectification the first, second switching tube of device corresponds to that switch state is (ON, ON) Lu Tu.

Fig. 3 is that improved three-phase mixed-rectification the first, second switching tube of device corresponds to switch state as the equivalent of (ON, OFF) Circuit diagram.

Fig. 4 is that improved three-phase mixed-rectification the first, second switching tube of device corresponds to switch state as the equivalent of (OFF, ON) Circuit diagram.

Fig. 5 is that improved three-phase mixed-rectification the first, second switching tube of device corresponds to switch state as the equivalent of (OFF, OFF) Circuit diagram.

The crisscross parallel circuit boost process first stage of Fig. 6 improved three-phase mixed-rectification device.

The crisscross parallel circuit boost process second stage of Fig. 7 improved three-phase mixed-rectification device.

The crisscross parallel circuit boost process phase III of Fig. 8 improved three-phase mixed-rectification device.

The crisscross parallel circuit boost process fourth stage of Fig. 9 improved three-phase mixed-rectification device.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it should be noted that embodiment described herein is only section Example of the invention, and the whole of non-present invention realize Mode, the embodiment only have exemplary.

The present invention provides a kind of improved three-phase mixed-rectification device based on crisscross parallel, as shown in Figure 1, including rectification Bridge Q, input filter circuit E, the harmonic injection circuit B being made of 6 diodes and 6 IGBT, by first switch tube (T₁), Two switching tube (T₂), the first inductance (L₁), the second inductance (L₂), first diode (D₁), the second diode (D₂) and capacitor (C) group At the DC-DC Buck chopper concatenated up and down, by first switch tube (Q₁), second switch (Q₂), third switching tube (Q₃)、 4th switching tube (Q₄), the 5th switching tube (Q₅), the 6th switching tube (Q₆), the 7th switching tube (Q₇), the 8th switching tube (Q₈), first Inductance (L_m1), the second inductance (L_m2) and capacitor (C_o) composition crisscross parallel circuit P, load R₀。

According to a kind of improved three-phase mixed-rectification device based on crisscross parallel, characterized by comprising: rectification Bridge Q, the harmonic injection circuit B being made of 6 diodes and 6 IGBT, wherein connection type is the first IGBT (S_x1) transmitting Pole and the 2nd IGBT (S_x2) collector connection, first diode (D_x1) anode and the second diode (D_x2) anode connection, First IGBT (S_x1) collector and first diode (D_x1) cathode connection, the 2nd IGBT (S_x2) collector and the two or two Pole pipe (D_x2) cathode connection；3rd IGBT (S_y1) emitter and the 4th IGBT (S_y2) collector connection, third diode (D_y1) anode and the 4th diode (D_y2) anode connection, the 3rd IGBT (S_y1) collector and third diode (D_y1) Cathode connection, the 4th IGBT (S_y2) collector and the 4th diode (D_y2) cathode connection；5th IGBT (S_z1) emitter With the 6th IGBT (S_z2) collector connection, the 5th diode (D_z1) anode and the 6th diode (D_z2) anode connection, the Five IGBT (S_z1) collector and the 5th diode (D_z1) cathode connection, the 6th IGBT (S_z2) collector and the six or two pole Manage (D_z2) cathode connection；7th diode (D₁) anode and the 8th diode (D₂) cathode connection；7th diode (D₁) Anode and the second diode (D_x2) cathode, the 4th diode (D_y2) cathode, the 6th diode (D_z2) cathode connection.

According to a kind of improved three-phase mixed-rectification device based on crisscross parallel, it is characterised in that the DC- DC Buck circuit is by first switch tube (T₁), second switch (T₂), the first inductance (L₁), the second inductance (L₂), the seven or two pole Manage (D₁), the 8th diode (D₂) and capacitor (C) composition；First switch tube (T₁) collector and rectifier bridge (Q) common cathode connect It connects；Second switch (T₂) emitter connect with the common-anode of rectifier bridge (Q)；First inductance (L₁) one end and first switch Manage (T₁) emitter, the 7th diode (D₁) cathode connection；First inductance (L₁) the other end connect with first capacitor (C)； The other end of first capacitor (C) and the second inductance (L₂) one end connection；Second inductance (L₂) the other end and the 8th diode (D₂) anode, second switch (T₂) collector connection.

According to a kind of improved three-phase mixed-rectification device based on crisscross parallel, it is characterised in that described interlocks Parallel circuit is by first switch tube (Q₁), second switch (Q₂), third switching tube (Q₃), the 4th switching tube (Q₄), the 5th switch Manage (Q₅), the 6th switching tube (Q₆), the 7th switching tube (Q₇), the 8th switching tube (Q₈), the first inductance (L_m1), the second inductance (L_m2) With capacitor (C_o) constitute；First inductance (L₁) one end respectively with one end of first capacitor (C), capacitor (C_o) one end, first open Close pipe (Q₁), third switching tube (Q₃), the 5th switching tube (Q₅), the 7th switching tube (Q₇) drain connection；Second inductance (L₂) One end respectively with the other end of first capacitor (C), capacitor (C_o) the other end and second switch (Q₂), the 4th switching tube (Q₄)、 6th switching tube (Q₆), the 8th switching tube (Q₈) source level connection；First inductance (L_m1) one end and first switch tube (Q₁) source Grade, second switch (Q₂) drain connection, the first inductance (L_m1) the other end and third switching tube (Q₃) source level, the 4th open Close pipe (Q₄) drain connection；Second inductance (L_m2) one end and the 5th switching tube (Q₅) source level, the 6th switching tube (Q₆) leakage Grade connection, the second inductance (L_m2) the other end and the 7th switching tube (Q₇) source level, the 8th switching tube (Q₈) drain connection.

According to a kind of improved three-phase mixed-rectification device based on crisscross parallel, it is characterised in that harmonic injection electricity The each way switch pipe in road, which is opened, will all correspond to four kinds of operating modes, be inputted by the tracking that input current may be implemented in PWM modulation Voltage realizes the correction of power factor, wherein with the 3rd IGBT (S_y1) and the 4th IGBT (S_y2) open for:

First working condition

DC bus inductive current I_DCThe two-phase in AC three-phase will be flowed through or keep freewheeling state through freewheeling diode, As first switch tube (T₁) and second switch (T₂) switch state be (ON, ON), as shown in Fig. 2, then having:

I_A=I_DC, I_B=0, I_C=-I_DC

The space vector of corresponding rectifier current on line side are as follows:

Second working condition

As first switch tube (T₁) and second switch (T₂) switch state be (ON, OFF), as shown in figure 3, then having:

I_A=I_DC, I_B=-I_DC, I_C=0

The space vector of corresponding rectifier current on line side are as follows:

Third working condition

As first switch tube (T₁) and second switch (T₂) switch state be (OFF, ON), as shown in figure 4, then having:

I_A=0, I_B=I_DC, I_C=-I_DC

The space vector of corresponding rectifier current on line side are as follows:

4th working condition

As first switch tube (T₁) and second switch (T₂) switch state be (OFF, OFF), as shown in figure 5, then having:

I_A=0, I_B=0, I_C=0

The space vector of corresponding rectifier current on line side are as follows:

According to a kind of improved three-phase mixed-rectification device based on crisscross parallel, it is characterised in that described to interlock simultaneously Connection circuit can realize buck, and output voltage range is wide, wherein being divided into four-stage by taking boost process as an example:

First stage

t₀~t₁Input current flows through two circuits, as shown in Figure 6: being by first switch tube (Q all the way₁), the first inductance (L_m1), the 4th switching tube (Q₄)；Another way is by the 5th switching tube (Q₅), the second inductance (L₂), the 8th switching tube (Q₈)；Electricity Hold (C_o) to loading load R₀Power supply.

Second stage

t₁~t₂Input current flows through two circuits, as shown in Figure 7: being by first switch tube (Q all the way₁), the first inductance (L_m1), the 4th switching tube (Q₄)；Another way is by the 5th switching tube (Q₅), the second inductance (L₂), the 7th switching tube (Q₇), it should Electric current is to capacitor (C_o) charging, to loading load R₀Power supply.

Phase III

t₂~t₃Input current flows through two circuits, as shown in Figure 8: being by first switch tube (Q all the way₁), the first inductance (L_m1), the 4th switching tube (Q₄)；Another way is by the 5th switching tube (Q₅), the second inductance (L₂), the 8th switching tube (Q₈)；Electricity Hold (C_o) to loading load R₀Power supply.

Fourth stage

t₃~t₄Input current flows through two circuits, as shown in Figure 9: being by first switch tube (Q all the way₁), the first inductance (L_m1), third switching tube (Q₃), the electric current is to capacitor (C_o) charging, to loading load R₀Power supply；Another way is by the 5th switch Manage (Q₅), the second inductance (L₂), the 8th switching tube (Q₈)。

The embodiment of the present invention is described above, the above mentioned embodiment is only schematical, without It is the limitation of the technical solution, so the invention is not limited to above-mentioned specific embodiment, all common skills in this field Art personnel are not under the premise of departing from present inventive concept and design and the simple replacement of other pairs of technical solution of the present invention and various Variation, belongs to protection scope of the present invention.