CN104158390A - Vector frequency converter - Google Patents
Vector frequency converter Download PDFInfo
- Publication number
- CN104158390A CN104158390A CN201310186561.0A CN201310186561A CN104158390A CN 104158390 A CN104158390 A CN 104158390A CN 201310186561 A CN201310186561 A CN 201310186561A CN 104158390 A CN104158390 A CN 104158390A
- Authority
- CN
- China
- Prior art keywords
- capacitor
- circuit
- frequency converter
- inductance
- electrical network
- 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.)
- Pending
Links
Landscapes
- Inverter Devices (AREA)
Abstract
The invention discloses a vector frequency converter, and belongs to the technical field of electronic power and electronics. The vector frequency converter comprises a rectification circuit, an upper buffer circuit, a flat wave circuit, an energy discharge circuit and an inversion circuit, and is characterized in that an input end filter circuit is arranged between the rectification circuit and a power network, and an output end filter circuit is arranged between the inversion circuit and the power network. Compared to the prior art, the influences of harmonic waves and conducted interference in voltages of the power network on the frequency converter in the prior art are overcome, and at the same time, complex harmonic waves generated by the frequency converter and feedback pollution of the conducted interference on the power network are also overcome. Besides, at the same time, the influences of the harmonic waves and high-frequency interference which are generated during the working process of the frequency converter on a motor are overcome, the problem of a temperature rise during the working process of the motor is avoided, and the life of the motor is prolonged.
Description
Technical field
The invention belongs to electric and electronic technical field, in particular, belong to a kind of device that the harmonic wave producing in the vector frequency converter course of work and conducted interference are carried out to effective filtering.
Background technology
In prior art, vector frequency converter comprises rectification circuit, upper buffer circuit, flat wave circuit, energy leadage circuit and inverter circuit, the frequency changer schematic diagram of Fig. 1 prior art.Rectification circuit 3 is made up of six diodes, is composed in series between two a brachium pontis, and three brachium pontis are in parallel again, and the centre of three brachium pontis is connected with L1, L2, the L3 of electrical network respectively, for being direct current three-phase alternating current electric rectification.Upper buffer circuit is composed in parallel by relay normally open contact K1 and resistance R, the charging current of flat wave circuit electrochemical capacitor while powering on for reducing.Flat wave circuit is connected by electrochemical capacitor C15, C16, and R1 and R2 are composed in series, then by its intermediate point short circuit, for reducing the pulsation of direct voltage.Energy leadage circuit is composed in series with IGBT Q7 by resistance R 3 is in parallel with diode D7 again, the feedback energy of motor while braking for the frequency converter of releasing.Inverter circuit is made up of six IGBT Q1, Q2, Q3, Q4, Q5, Q6, each IGBT is connected with diode D8, D9, D10, D11, D12, D13 inverse parallel respectively, for by DC inverter being all adjustable three-phase alternating current U, V, W of amplitude and frequency, three-phase alternating current U, V, W power to motor, antiparallel six diode D8, D9, D10, D11, D12, D13 in the time that frequency converter is braked for electromotor feedback energy provides freewheeling circuit.
Harmonic wave in prior art in line voltage and conducted interference have a significant impact frequency converter service behaviour, and while frequency converter produces complicated harmonic wave and conducted interference is fed back pollution to electrical network.Simultaneously because the harmonic wave producing in the frequency converter course of work and High-frequency Interference can produce suitable impact to motor, can cause motor temperature and then affect life-span of motor.
Summary of the invention
The present invention, in order to solve above technical problem, has provided a kind of vector frequency converter.
Vector frequency converter of the present invention, comprises rectification circuit, upper buffer circuit, flat wave circuit, energy leadage circuit and inverter circuit; Its spy is just: between described rectification circuit and electrical network, have input filtering circuit, have output filter circuit between described inverter circuit and motor.
According to above-described vector frequency converter, preferably: described input filtering circuit comprises: capacitor C 1, C2, C3 are connected respectively at electrical network L1, L2, L3, and the other end is connected with one end of capacitor C 4 jointly, the other end ground connection of capacitor C 4; One end of capacitor C 5, C6, C7 is connected on respectively between three terminal a, b, the c of electrical network L1, L2, L3 and inductance L, the other end ground connection of capacitor C 5, C6, C7; Piezo-resistance RV1, RV2, RV3 are connected on respectively between electrical network L1-L2, L2-L3, L1-L3, and inductance L is three-phase common mode inductance, and L1, L2, L3 structure are identical, and on same iron core; It is upper that one end of capacitor C 8, C9, C10 is connected to three terminal f, e, the d of inductance L, the other end ground connection of capacitor C 8, C9, C10; It is upper that one end of capacitor C 11, C12, C13 is connected to three terminal f, e, the d of inductance L, and the other end of capacitor C 11, C12, C13 is connected with one end of capacitor C 14 jointly, the other end ground connection of capacitor C 14.
According to above-described vector frequency converter, preferably: described output filter circuit comprises: capacitor C 1 ', C2 ', C3 ' are connected respectively at inverter circuit U, V, W, and the other end is connected with one end of capacitor C 4 ' jointly, the other end ground connection of capacitor C 4 '; One end of capacitor C 5 ', C6 ', C7 ' is connected on respectively between three terminal a ', b ', the c ' of electrical network L1 ', L2 ', L3 ' and inductance L, the other end ground connection of capacitor C 5 ', C6 ', C7 '; Piezo-resistance RV1 ', RV2 ', RV3 ' are connected on respectively between electrical network U-V, V-W, U-W, and inductance L is three-phase common mode inductance, and U, V, W structure are identical, and on same iron core; Three terminal f ', e ', d ' that one end of capacitor C 8 ', C9 ', C10 ' is connected to inductance L go up, the other end ground connection of capacitor C 8 ', C9 ', C10 '.
According to above-described vector frequency converter, preferably: C1 ', C2 ', C3 ' in C1, C2, C3, C11, C12, C13 and described output filter circuit in described input filtering circuit are common mode capacitance.
According to above-described vector frequency converter, preferably: C4 ', C5 ', C6 ', C7 ', C8 ', C9 ', C10 ' in C4, C5, C6, C7, C8, C9, C10, C14 and described output filter circuit in described input filtering circuit are differential mode capacitor.
The present invention is compared with prior art: overcome the harmonic wave in line voltage and the impact of conducted interference on frequency converter in prior art, also overcome that frequency converter produces complicated harmonic wave and conducted interference is polluted the feedback of electrical network simultaneously, greatly reduced interference and the pollution problem of frequency converter to electrical network, greatly improved the stability of electrical network simultaneously.Also the harmonic wave and the impact of High-frequency Interference on motor that in the frequency converter course of work, produce, the life-span of having avoided the problem of temperature rise in the motor course of work and then having improved motor have been overcome simultaneously.
Brief description of the drawings
The frequency changer schematic diagram of accompanying drawing 1 prior art;
Accompanying drawing 2 frequency changer schematic diagram of the present invention.
Embodiment
Fig. 2 frequency changer schematic diagram of the present invention.A kind of vector frequency converter of the present invention, comprises rectification circuit 1, upper buffer circuit 2, flat wave circuit 3, energy leadage circuit 4 and inverter circuit 5; Between described rectification circuit and electrical network, have input filtering circuit 6, described inverter circuit and and motor between have output filter circuit 7.
The input filtering circuit 6 of vector frequency converter of the present invention comprises: capacitor C 1, C2, C3 are connected respectively at electrical network L1, L2, L3, and the other end is connected with one end of capacitor C 4 jointly, the other end ground connection of capacitor C 4; One end of capacitor C 5, C6, C7 is connected on respectively between three terminal a, b, the c of electrical network L1, L2, L3 and inductance L, the other end ground connection of capacitor C 5, C6, C7; Piezo-resistance RV1, RV2, RV3 are connected on respectively between electrical network L1-L2, L2-L3, L1-L3, and inductance L is three-phase common mode inductance, and L1, L2, L3 structure are identical, and on same iron core; It is upper that one end of capacitor C 8, C9, C10 is connected to three terminal f, e, the d of inductance L, the other end ground connection of capacitor C 8, C9, C10; It is upper that one end of capacitor C 11, C12, C13 is connected to three terminal f, e, the d of inductance L, and the other end of capacitor C 11, C12, C13 is connected with one end of capacitor C 14 jointly, the other end ground connection of capacitor C 14.The harmonic wave in line voltage and the impact of conducted interference on frequency converter in prior art are overcome, also overcome that frequency converter produces complicated harmonic wave and conducted interference is polluted the feedback of electrical network simultaneously, greatly reduced interference and the pollution problem of frequency converter to electrical network, greatly improved the stability of electrical network simultaneously.
The output filter circuit 7 of vector frequency converter of the present invention comprises: capacitor C 1 ', C2 ', C3 ' are connected respectively at inverter circuit U, V, W, and the other end is connected with one end of capacitor C 4 ' jointly, the other end ground connection of capacitor C 4 '; One end of capacitor C 5 ', C6 ', C7 ' is connected on respectively between three terminal a ', b ', the c ' of electrical network L1 ', L2 ', L3 ' and inductance L, the other end ground connection of capacitor C 5 ', C6 ', C7 '; Piezo-resistance RV1 ', RV2 ', RV3 ' are connected on respectively between electrical network U-V, V-W, U-W, inductance L ' be three-phase common mode inductance, U, V, W structure are identical, and on same iron core; Three terminal f ', e ', d ' that one end of capacitor C 8 ', C9 ', C10 ' is connected to inductance L go up, the other end ground connection of capacitor C 8 ', C9 ', C10 '.Also the harmonic wave and the impact of High-frequency Interference on motor that in the frequency converter course of work, produce, the life-span of having avoided the problem of temperature rise in the motor course of work and then having improved motor have been overcome simultaneously.
C1 ', C2 ', C3 ' in C1, C2, C3, C11, C12, C13 and described output filter circuit 7 in described input filtering circuit 6 are common mode capacitance.
C4 ', C5 ', C6 ', C7 ', C8 ', C9 ', C10 ' in C4, C5, C6, C7, C8, C9, C10, C14 and described output filter circuit 7 in described input filtering circuit 6 are differential mode capacitor.
Claims (5)
1. a vector frequency converter, comprises rectification circuit, upper buffer circuit, flat wave circuit, energy leadage circuit and inverter circuit; Its spy is just: between described rectification circuit and electrical network, have input filtering circuit, have output filter circuit between described inverter circuit and motor.
2. vector frequency converter according to claim 1, its spy is just: described input filtering circuit comprises: capacitor C 1, C2, C3 are connected respectively at electrical network L1, L2, L3, and the other end is connected with one end of capacitor C 4 jointly, the other end ground connection of capacitor C 4; One end of capacitor C 5, C6, C7 is connected on respectively between three terminal a, b, the c of electrical network L1, L2, L3 and inductance L, the other end ground connection of capacitor C 5, C6, C7; Piezo-resistance RV1, RV2, RV3 are connected on respectively between electrical network L1-L2, L2-L3, L1-L3, and inductance L is three-phase common mode inductance, and L1, L2, L3 structure are identical, and on same iron core; It is upper that one end of capacitor C 8, C9, C10 is connected to three terminal f, e, the d of inductance L, the other end ground connection of capacitor C 8, C9, C10; It is upper that one end of capacitor C 11, C12, C13 is connected to three terminal f, e, the d of inductance L, and the other end of capacitor C 11, C12, C13 is connected with one end of capacitor C 14 jointly, the other end ground connection of capacitor C 14.
3. vector frequency converter according to claim 1, its spy is just: described output filter circuit comprises: capacitor C 1 ', C2 ', C3 ' are connected respectively at inverter circuit U, V, W, the other end is connected with one end of capacitor C 4 ' jointly, the other end ground connection of capacitor C 4 '; One end of capacitor C 5 ', C6 ', C7 ' is connected on respectively between three terminal a ', b ', the c ' of electrical network L1 ', L2 ', L3 ' and inductance L, the other end ground connection of capacitor C 5 ', C6 ', C7 '; Piezo-resistance RV1 ', RV2 ', RV3 ' are connected on respectively between electrical network U-V, V-W, U-W, and inductance L is three-phase common mode inductance, and U, V, W structure are identical, and on same iron core; One end of capacitor C 8 ', C9 ', C10 ' is connected on three terminal f ', e ', the d ' of inductance L.
4. according to the vector frequency converter described in claim 1-3, its spy is just: C1 ', C2 ', C3 ' in C1, C2, C3, C11, C12, C13 and described output filter circuit in described input filtering circuit are common mode capacitance.
5. according to the vector frequency converter described in claim 1-3, its spy is just: C4 ', C5 ', C6 ', C7 ', C8 ', C9 ', C10 ' in C4, C5, C6, C7, C8, C9, C10, C14 and described output filter circuit in described input filtering circuit are differential mode capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310186561.0A CN104158390A (en) | 2013-05-13 | 2013-05-13 | Vector frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310186561.0A CN104158390A (en) | 2013-05-13 | 2013-05-13 | Vector frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104158390A true CN104158390A (en) | 2014-11-19 |
Family
ID=51883827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310186561.0A Pending CN104158390A (en) | 2013-05-13 | 2013-05-13 | Vector frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104158390A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108988733A (en) * | 2017-05-31 | 2018-12-11 | 徐州安邦信汽车电机科技有限公司 | Vector-control frequency converter for motor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11225477A (en) * | 1998-02-05 | 1999-08-17 | Shinko Electric Co Ltd | Sine wave converter with filtering function |
| CN101764525A (en) * | 2010-02-11 | 2010-06-30 | 哈尔滨工业大学（威海） | Vector transducer with low electromagnetic interference |
-
2013
- 2013-05-13 CN CN201310186561.0A patent/CN104158390A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11225477A (en) * | 1998-02-05 | 1999-08-17 | Shinko Electric Co Ltd | Sine wave converter with filtering function |
| CN101764525A (en) * | 2010-02-11 | 2010-06-30 | 哈尔滨工业大学（威海） | Vector transducer with low electromagnetic interference |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108988733A (en) * | 2017-05-31 | 2018-12-11 | 徐州安邦信汽车电机科技有限公司 | Vector-control frequency converter for motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104333231A (en) | LCC serial-parallel resonant power supply and method for increasing switching frequency by power supply | |
| CN104170235B (en) | Power conversion device | |
| CN105245123B (en) | Three-phase neutral-point-clamped three-level inverter one-dimensional modulation common mode current suppressing method | |
| CN103730940A (en) | Vehicle-mounted charger of electric automobile | |
| CN102806407A (en) | Inverter welding machine | |
| CN103475242A (en) | Plasma high frequency high voltage power supply | |
| CN203398998U (en) | Vector frequency converter | |
| CN101764525B (en) | Vector transducer with low electromagnetic interference | |
| CN102195507A (en) | Transformer-less grid-connected inverting circuit | |
| CN105610342A (en) | Topological structure of photovoltaic grid-connected single-phase inverter employing fly-wheel neutral point potential | |
| CN104158390A (en) | Vector frequency converter | |
| CN105186914A (en) | Novel H6 single-phase non-isolation grid-connected inverter | |
| CN102231606A (en) | Transformerless gird-connected inverter circuit | |
| CN101976966B (en) | Novel auxiliary inverter power supply by using zero-current soft switch technology | |
| CN102684519B (en) | Circuit and control method thereof | |
| CN102064722B (en) | Single-stage alternating current/direct current converter | |
| CN104579076A (en) | Vector control frequency converter | |
| CN102347697B (en) | Direct DC-AC (direct current-alternating current) converting circuit for low-voltage input full bridge inverter | |
| CN107689734A (en) | High-power transformation system | |
| CN203301393U (en) | Non transformer single-phase grid connected inverter | |
| CN102437761A (en) | Single-phase full bridge three-level inverter and three-phase three-level inverter | |
| CN104578728A (en) | Vector frequency converter | |
| CN102097930A (en) | Anti-DC electromagnetic interference highly-efficiency inverter | |
| CN204442188U (en) | A kind of electrostatic precipitation high-frequency device | |
| CN102255540A (en) | Method, circuit and converter for converting DC voltage into AC voltage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141119 |
|
| WD01 | Invention patent application deemed withdrawn after publication |