CN203368354U - Straight-through three-phase voltage source PWM rectifying circuit - Google Patents
Straight-through three-phase voltage source PWM rectifying circuit Download PDFInfo
- Publication number
- CN203368354U CN203368354U CN 201320460959 CN201320460959U CN203368354U CN 203368354 U CN203368354 U CN 203368354U CN 201320460959 CN201320460959 CN 201320460959 CN 201320460959 U CN201320460959 U CN 201320460959U CN 203368354 U CN203368354 U CN 203368354U
- Authority
- CN
- China
- Prior art keywords
- phase
- switching tube
- straight
- circuit
- diode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses a straight-through three-phase voltage source PWM rectifying circuit which comprises a three-phase AC voltage source (E), a three-phase reactor (Ls), a first switch tube (IGBT1), a second switch tube (IGBT2), a third switch tube (IGBT3), a fourth switch tube (IGBT4), a fifth switch tube (IGBT5), a sixth switch tube (IGBT6), a diode (D7), a buffer circuit (1), a capacitor (C0) and a load (RL). The straight-through three-phase voltage source PWM rectifying circuit is simple and practical. According to the rectifying circuit, there is no need to set dead-time so as to avoid output waveform distortion and reduced output efficiency which are caused by too large dead-time. Straight-through occurred in a three-phase bridge arm is allowed. The problem that electromagnetic interference leads to IGBT straight-through so as to damage the circuit is avoided. The circuit is safer and more reliable.
Description
Technical field
The utility model relates to the three phase rectifier technology, relates in particular to a kind of three-phase electricity type that can be straight-through and presses the PWM rectification circuit, belongs to power electronics and exchanges technical field.
Background technology
Three-phase PWM Voltage Rectifier has the plurality of advantages such as High Power Factor, low current harmonic wave, direct voltage output be stable, becomes one of hot subject of current power electronic applications research.2000 of TI company is that the class dsp processor has PWM output easily, is usually used in producing the break-make that 6 road pwm signals are controlled 6 switching tubes of rectification circuit.Yet traditional three-phase voltage type PWM rectification circuit does not allow two IGBT conducting simultaneously of same brachium pontis, must produce the pwm signal of 6 tunnels with the dead band complementation by dsp processor, and this must have a negative impact to system; Simultaneously when electromagnetic interference appears in circuit, may mislead two IGBT conductings simultaneously that cause same brachium pontis and burn IGBT.
The utility model content
The deficiency existed for prior art, the utility model discloses a kind of three-phase voltage type PWM rectification circuit that can be straight-through, two IGBT that realize same brachium pontis reduce to 0 both end voltage when straight-through occurs, thereby avoid IGBT to burn because of the over-current signal that bridge arm direct pass produces.
The utility model is for achieving the above object, and the technical scheme adopted is as follows:
A kind of three-phase voltage type PWM rectification circuit that can be straight-through, it comprises: three-phase alternating current potential source, three-phase reactor, the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, diode, buffer circuit, electric capacity, load; Described three-phase alternating current potential source is connected with three-phase reactor one end; Described the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube form three-phase commutation bridge; The other end of described three-phase reactor is connected with 3 brachium pontis mid points of three-phase commutation bridge respectively; The output anode of described three-phase commutation bridge and the anodic bonding of diode; The negative electrode of described diode is connected with an end of buffer circuit; The other end of described buffer circuit and the anodic bonding of electric capacity; The negative electrode of described electric capacity is connected with the output cathode of three-phase commutation bridge; Described load and Capacitance parallel connection.
Described diode is fast recovery diode.
Described buffer circuit is composed in parallel by current-limiting resistance and relay or is composed in parallel by current-limiting resistance and field effect transistor.
Compare with the prior art scheme, the utlity model has following advantage and technique effect:
1, circuit is simple and practical, without Dead Time is set, avoids dead band time setting excessive and bring output waveform distortion and delivery efficiency to reduce;
2, allow bridge arm direct pass, avoid the straight-through problem of damaging circuit of IGBT caused due to electromagnetic interference, circuit is more safe and reliable.
The accompanying drawing explanation
Fig. 1 is a kind of three-phase PWM rectification circuit schematic diagram that can be straight-through of the present utility model.
Fig. 2 is a kind of matlab simulated effect figure of three-phase PWM rectification circuit when leading directly to appears in brachium pontis that can be straight-through of the present utility model.
Fig. 3 is the matlab simulated effect figure of traditional three-phase PWM rectification circuit when leading directly to appears in brachium pontis.
Embodiment
Below in conjunction with accompanying drawing and example, enforcement of the present utility model and protection are described further, but enforcement of the present utility model and protection are not limited to this.
As shown in Figure 1, a kind of three-phase PWM rectification circuit schematic diagram that can be straight-through of the present utility model, figure comprises: three-phase alternating current potential source E, three-phase reactor Ls, the first switching tube IGBT1, second switch pipe IGBT2, the 3rd switching tube IGBT3, the 4th switching tube IGBT4, the 5th switching tube IGBT5, the 6th switching tube IGBT6, diode D7, buffer circuit 1, capacitor C
0, load R
l; Described three-phase alternating current potential source E is connected with three-phase reactor Ls mono-end; Described the first switching tube IGBT1, second switch pipe IGBT2, the 3rd switching tube IGBT3, the 4th switching tube IGBT4, the 5th switching tube IGBT5, the 6th switching tube IGBT6 form three-phase commutation bridge; The other end of described three-phase reactor Ls is connected with 3 brachium pontis mid point A, B, C of three-phase commutation bridge respectively; The anodic bonding of the output anode of described three-phase commutation bridge and diode D7; The negative electrode of described diode D7 is connected with buffer circuit 1 one ends; The other end of described buffer circuit 1 and capacitor C
0anodic bonding; Described capacitor C
0negative electrode with the output cathode of three-phase commutation bridge, be connected; Described load R
lwith capacitor C
0in parallel.
As preferably, the driving signal of described the first switching tube IGBT1, second switch pipe IGBT2, the 3rd switching tube IGBT3, the 4th switching tube IGBT4, the 5th switching tube IGBT5, the 6th switching tube IGBT6 can select the dsp processor of Texas Instruments's 2000 series to produce.
Described diode D7 is fast recovery diode, when straight-through phenomenon appears in IGBT, due to capacitor C
0the voltage at two ends can't be added on the output of three-phase commutation bridge because of diode D7 unilateral conduction, make the IGBT both end voltage reduce to rapidly 0V, thereby avoid the overcurrent produced due to bridge arm direct pass, Fig. 2 is a kind of matlab simulated effect figure of three-phase PWM rectification circuit when leading directly to appears in brachium pontis that can be straight-through of the present utility model, abscissa means time, the s of unit, ordinate means to flow through electric current, the A of unit of IGBT, as can be seen from Figure, when 0.7s ~ 0.7001s, brachium pontis occurs straight-throughly, and the electric current that flows through IGBT on straight-through brachium pontis is the 40A left and right; And traditional three-phase PWM rectification circuit is when leading directly to appears in brachium pontis, can produce overcurrent and burn IGBT, as Fig. 3 is the matlab simulated effect figure of traditional three-phase PWM rectification circuit when leading directly to appears in brachium pontis, abscissa means time, the s of unit, ordinate means to flow through electric current, the A of unit of IGBT, as can be seen from Figure, when 0.7s ~ 0.7001s, brachium pontis occurs straight-throughly, and the electric current that flows through IGBT on straight-through brachium pontis reaches 10
5a.
Described buffer circuit 1 is by current-limiting resistance Rx and relay K composes in parallel or composed in parallel by current-limiting resistance Rx and field effect transistor K, in circuit start moment, dsp processor is exported a road low level signal control relay K shutoff and is made current-limiting resistance Rx place in circuit, reduces to start the surge current of moment; DSP sets the certain hour time delay simultaneously, and when reaching setting-up time, a road low level signal of dsp processor output becomes high level makes the relay K closure, makes current-limiting resistance Rx short circuit, and excess loss while reducing to work, improve circuit efficiency.
Those skilled in the art can make various modifications to this specific embodiment or supplement or adopt similar mode to substitute under the prerequisite without prejudice to principle of the present utility model and essence, but these changes all fall into protection range of the present utility model.Therefore the utility model technical scope is not limited to above-described embodiment.
Claims (3)
- One kind can be straight-through three-phase voltage type PWM rectification circuit, it is characterized in that comprising: three-phase alternating current potential source (E), three-phase reactor (Ls), the first switching tube (IGBT1), second switch pipe (IGBT2), the 3rd switching tube (IGBT3), the 4th switching tube (IGBT4), the 5th switching tube (IGBT5), the 6th switching tube (IGBT6), diode (D7), buffer circuit (1), electric capacity (C 0), load (R l); Described three-phase alternating current potential source (E) is connected with three-phase reactor (Ls) end; Described the first switching tube (IGBT1), second switch pipe (IGBT2), the 3rd switching tube (IGBT3), the 4th switching tube (IGBT4), the 5th switching tube (IGBT5), the 6th switching tube (IGBT6) form three-phase commutation bridge; The other end of described three-phase reactor (Ls) is connected with 3 brachium pontis mid points (A, B, C) of three-phase commutation bridge respectively; The anodic bonding of the output anode of described three-phase commutation bridge and diode (D7); The negative electrode of described diode (D7) is connected with buffer circuit (1) one end; The other end of described buffer circuit (1) and electric capacity (C 0) anodic bonding; Described electric capacity (C 0) negative electrode with the output cathode of three-phase commutation bridge, be connected; Described load (R l) and electric capacity (C 0) parallel connection.
- 2. three-phase voltage type PWM rectification circuit that can be straight-through according to claim 1, is characterized in that described diode (D7) is fast recovery diode.
- 3. three-phase voltage type PWM rectification circuit that can be straight-through according to claim 1, is characterized in that described buffer circuit (1) is composed in parallel by current-limiting resistance (Rx) and relay (K) or composed in parallel by current-limiting resistance (Rx) and field effect transistor (K).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320460959 CN203368354U (en) | 2013-07-31 | 2013-07-31 | Straight-through three-phase voltage source PWM rectifying circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320460959 CN203368354U (en) | 2013-07-31 | 2013-07-31 | Straight-through three-phase voltage source PWM rectifying circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203368354U true CN203368354U (en) | 2013-12-25 |
Family
ID=49816070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320460959 Expired - Fee Related CN203368354U (en) | 2013-07-31 | 2013-07-31 | Straight-through three-phase voltage source PWM rectifying circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203368354U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401446A (en) * | 2013-07-31 | 2013-11-20 | 华南理工大学 | Direct-accessible three-phase voltage PWM (pulse width modulation) rectifying circuit |
-
2013
- 2013-07-31 CN CN 201320460959 patent/CN203368354U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401446A (en) * | 2013-07-31 | 2013-11-20 | 华南理工大学 | Direct-accessible three-phase voltage PWM (pulse width modulation) rectifying circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101902143B (en) | Capacitor-clamped three-level dual-buck half-bridge inverter | |
| CN211656005U (en) | Three-level power conversion circuit | |
| CN204362337U (en) | Electromagnetic Heating control circuit and electromagnetic heating apparatus | |
| CN105099249A (en) | High-reliability double-input inverter | |
| CN203747686U (en) | Single-phase mixed three-level grid-connected inverter | |
| CN203747688U (en) | Three-level grid-connected inverter | |
| CN204517648U (en) | A kind of discharge circuit, charge-discharge circuit and inverter | |
| CN101483397A (en) | Diode clamping tri-level dual decompression type semi-bridge inverter | |
| CN103312211A (en) | Control method of single phase grid-connected inverter | |
| CN102403920B (en) | Three-level half-bridge photovoltaic grid connected inverter | |
| CN203827203U (en) | High-power optical storage integrated converter | |
| CN203368354U (en) | Straight-through three-phase voltage source PWM rectifying circuit | |
| CN103516242A (en) | Three-level three-phase half-bridge inverter circuit | |
| CN204304771U (en) | A kind of parallel IGBT drive circuit | |
| CN203301393U (en) | Non transformer single-phase grid connected inverter | |
| CN103973090B (en) | Three-phase PWM Voltage Rectifier voltage classification soft starting circuit and control method thereof | |
| CN104967350A (en) | High-efficiency H7-type single-phase non-isolated grid-connected inverter | |
| CN104167946A (en) | Midpoint clamping type single-phase non-isolated photovoltaic inverter main circuit topology with follow current switch | |
| CN103401446A (en) | Direct-accessible three-phase voltage PWM (pulse width modulation) rectifying circuit | |
| CN103595286A (en) | Dead-time compensation method and circuit used for bipolar modulation inverter bridge | |
| CN203896194U (en) | Switch power supply | |
| CN203813420U (en) | Low-cost inverter output short-circuit protecting circuit | |
| CN103001524A (en) | Single-phase inverter | |
| CN202364147U (en) | Inverter with high-efficient and low output leakage current | |
| CN202026242U (en) | High-frequency and high-voltage direct-current switching power supply based on current source mode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 Termination date: 20200731 |