CN201956961U - Energy feedback device based on power unit cascade type high voltage frequency converter - Google Patents
Energy feedback device based on power unit cascade type high voltage frequency converter Download PDFInfo
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- CN201956961U CN201956961U CN2011200430800U CN201120043080U CN201956961U CN 201956961 U CN201956961 U CN 201956961U CN 2011200430800 U CN2011200430800 U CN 2011200430800U CN 201120043080 U CN201120043080 U CN 201120043080U CN 201956961 U CN201956961 U CN 201956961U
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- 239000003990 capacitor Substances 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005086 pumping Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- 230000009183 running Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
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- 238000005065 mining Methods 0.000 description 1
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- 230000010363 phase shift Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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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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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
本实用新型涉及电力电子技术领域，尤其涉及一种基于功率单元级联型高压变频器的能量回馈装置。本实用新型包括控制电路、整流电路、中间直压电路、逆变电路；其中，所述整流电路采用IGBT功率器件，构成三相PWM整流器，所述整流电路的其余单元采用六个二极管，构成三相桥式不控整流电路，所述逆变电路采用IGBT构成单相H型桥式电路。本实用新型以最简洁、经济的主回路解决了功率单元级联型高压变频器发电运行时在直流母线电压上产生的电压泵升问题，满足了各种电机负荷四象限运行的要求，具有很好的节能效果，降低了功率单元造价成本，具有很高的经济性。
The utility model relates to the technical field of power electronics, in particular to an energy feedback device based on power unit cascaded high-voltage frequency converters. The utility model comprises a control circuit, a rectification circuit, an intermediate direct voltage circuit, and an inverter circuit; wherein, the rectification circuit adopts an IGBT power device to form a three-phase PWM rectifier, and the remaining units of the rectification circuit adopt six diodes to form a three-phase PWM rectifier. Phase bridge type uncontrolled rectification circuit, the inverter circuit uses IGBT to form a single-phase H-type bridge circuit. The utility model solves the problem of voltage pumping generated on the DC bus voltage when the power unit cascaded high-voltage frequency converter is generating power with the most concise and economical main circuit, meets the requirements of four-quadrant operation of various motor loads, and has great advantages The good energy-saving effect reduces the cost of the power unit and has high economy.
Description
Technical field
The utility model relates to electric and electronic technical field, relates in particular to a kind of energy back feed device based on cascade of power units type high voltage converter.
Background technology
Development along with power electronic technology, frequency converter is as one of main achievement of Development of Power Electronic Technology, because its power factor height, efficient height, precision height, speed-regulating range width, so the every field in national economy is widely used as industries such as metallurgy, mine, petrochemical industry, electric power, and is bringing into play more and more important effect.
At present, on the market general high voltage converter many can not be directly used in need to rise fast, the governing system of braking and frequent forward and backward, as express elevator, mining elevator, rolling mill, large-sized gantry planer, winding mechanism tension system and machine tool chief axis drive system etc.Because this system requirements motor four quadrant running, when motor slowed down, brakes or is with potential energy load weight to transfer, motor was in regenerative power generation state.Because the uncontrollable rectifier power transfer of diode is irreversible, the regenerative electric energy of generation is transferred on the DC side filter capacitor, produces very high pump up voltage.If untimely release will certainly cause the action of frequency converter overvoltage protection or cause the overvoltage of major loop high power device to damage.On the engineering this pump risen that energy is many to consume with heat energy or other form, greatly must waste the energy, do not meet current energy-conservation demand.
The utility model content
At the technical problem of above-mentioned existence, the purpose of this utility model provides a kind of energy back feed device based on cascade of power units type high voltage converter, reaching simple in structure, economical, and can satisfy the requirement of load four quadrant running.
For achieving the above object, the utility model adopts following technical scheme:
A kind of energy back feed device based on cascade of power units type high voltage converter comprises:
Control circuit, rectification circuit, middle straight volt circuit, inverter circuit; Wherein, described rectification circuit adopts the IGBT power device, constitutes Three-Phase PWM Rectifier, and the remaining element of described rectification circuit adopts six diodes, constitutes not control rectifying circuit of three-phase bridge;
Described inverter circuit adopts IGBT to constitute single-phase H type bridge circuit.
The secondary side of phase shifting transformer passes through filter reactor respectively, be connected to each power cell, input side constitutes not control rectifying circuit of three-phase bridge by six diodes, and intermediate circuit constitutes the DC charging part by capacitor, and outlet side constitutes single-phase H type bridge inverter main circuit by four IGBT devices.
A kind of energy back feed device based on cascade of power units type high voltage converter comprises:
Control circuit, rectification circuit, middle straight volt circuit, inverter circuit; Wherein, described rectification circuit adopts six IGBT devices to constitute three-phase PWM rectification and feedback circuit;
Described inverter circuit adopts IGBT to constitute single-phase H type bridge circuit.
The secondary side of phase shifting transformer passes through filter reactor respectively, be connected to each power cell, input side connects and composes three-phase PWM rectification and feedback circuit by six IGBT devices according to three-phase bridge circuit, intermediate circuit constitutes the DC charging part by capacitor, and outlet side constitutes single-phase H type bridge inverter main circuit by four IGBT devices.
High voltage converter comprises rectification side controller and inversion side controller, after middle vertical compression letter and power current signal are delivered to the rectification side controller, handles IGBT break-make in the output control signal power controlling unit Three-Phase PWM Rectifier through the rectification side controller;
After the rotating speed of motor and voltage signal are delivered to the inversion side controller, handle the break-make of IGBT in the output control signal control inversion side H bridge through the inversion side controller.
The utlity model has following advantage and good effect:
The voltage pump that has produced on DC bus-bar voltage when 1) frequency converter that provides of the utility model has solved cascade of power units type high voltage converter generator operation with succinct, the most economic major loop rises problem, satisfy the requirement of various motor load four quadrant runnings, had good energy-saving effect;
2) frequency converter that provides of the utility model has reduced power cell cost cost, has very high economy.
Description of drawings
Fig. 1 is the major loop topology diagram of the cascade of power units type high voltage converter that provides of the present utility model.
Fig. 2 is the non-four-quadrant power cell schematic diagram of the cascade of power units type high voltage converter that provides of the utility model.
Fig. 3 is the part four-quadrant power cell schematic diagram of the cascade of power units type high voltage converter that provides of the utility model.
Embodiment
The utility model is described in further detail in conjunction with the accompanying drawings with specific embodiment below:
Fig. 1 is the major loop topology diagram for cascade of power units type high voltage converter.The major loop of cascade of power units type high voltage converter mainly comprises input power supply, phase shifting transformer, power cell, controller etc.High Level AC Voltage is given each power cell A1, A2, A3, A4, A5 respectively after phase shifting transformer step-down, phase shift, B1, B2, B3, B4, B5, C1, C2, C3, C4, C5 provides three phase mains, each power cell A1, A2, A3, A4, A5, B1, B2, B3, B4, B5, C1, C2, C3, C4, the output voltage of C5 forms three-phase sine-wave after overlapped in series, power to motor.After the rotating speed of motor and current signal were delivered to controller, via controller was handled, and exported the break-make of the PWM rectifier in the control signal power controlling unit then.
Fig. 2 is the non-four-quadrant power cell schematic diagram of cascade of power units type high voltage converter.It comprises control circuit, rectification circuit, intermediate DC circuit and inverter circuit, in described rectification circuit, adopts six diodes, constitutes not control rectifying circuit of three-phase bridge, in described inverter circuit, adopts IGBT to constitute single-phase H type bridge circuit.
Specifically, the secondary side of phase shifting transformer by filter reactor, is received each power cell A1, A2, A3, A4, A5, B1 respectively, B2, B3, B4, B5, C1, C2, C3, C4, C5, input side be by six diode D1, D2, and D3, D4, D5, D6 constitute not control rectifying circuit of three-phase bridge.The centre is the DC charging part that is made of capacitor, and outlet side is by four IGBT device Q1, Q2, Q3, the single-phase H type bridge inverter main circuit that Q4 constitutes.A controller is arranged in the high voltage converter: after the rotating speed of motor and voltage signal were delivered to controller, via controller was handled cut-offfing of IGBT in the output control signal control inverter H bridge, makes inverter circuit output correspondent voltage and frequency.
Machine operation is at motoring condition, and the alternating current of input does not become direct current behind the control rectifying circuit through three-phase, is added to then on the DC charging electric capacity, pass through four IGBT Q1 of control inverter, Q2, Q3 again, Q4 makes direct current become the AC power of required voltage, frequency again.Form three-phase sine-wave behind the folded ripple of output voltage series connection of each power cell, be used for driving high-tension motor.This moment, electric energy was added on the motor through high voltage converter by electrical network, and motor operates in first, third quadrant, and high voltage converter is operated in rectification state.
When motor was operated in on-position, because diode can not anti-phase conducting, the energy that the motor generator operation produces produced the pump up voltage through single-phase bridge H type inverter circuit, feed back on the intermediate dc electric capacity fast.This energy needs to feed back to electrical network by the Three-Phase PWM Rectifier of other four-quadrant power cell.
Fig. 3 is the part four-quadrant power cell schematic diagram of cascade of power units type high voltage converter, it comprises control circuit, rectification circuit, intermediate DC circuit and inverter circuit, in described rectification circuit, adopt six IGBT devices, constitute Three-Phase PWM Rectifier, in described inverter circuit, adopt IGBT to constitute single-phase H type bridge circuit.
Specifically, the secondary side of phase shifting transformer by filter reactor, is received each power cell A1, A2 respectively, A3, A4, A5, B1, B2, B3, B4, B5, C1, C2, C3, C4, C5, input side is by six IGBT device T1, T2, T3, T4, T5, T6 connects and composes three-phase PWM rectification and feedback circuit according to three-phase bridge circuit.The centre is the DC charging part that is made of capacitor, and outlet side is by four IGBT device Q1, Q2, Q3, the single-phase H type bridge inverter main circuit that Q4 constitutes.Two controllers are arranged: rectification side controller one and inversion side controller two in the high voltage converter.After middle vertical compression and power current signal are delivered to controller one, via controller one is handled, export the break-make of IGBT in the control signal power controlling unit Three-Phase PWM Rectifier then, make rectification circuit can be operated in rectification state and also can be operated in inverter mode, guarantee the two-way flow of energy.For controller two, after the rotating speed of motor and voltage signal were delivered to controller two, the cut-offfing of IGBT in the wherethrough reason output control signal control inversion side H bridge made inverter circuit output correspondent voltage and frequency.
When machine operation during at motoring condition, by six IGBT T1 of control Three-Phase PWM Rectifier, T2, T3, T4, T5, the break-make of T6 makes power cell be in the rectification operating state, and the alternating current of input becomes direct current behind the PWM rectifier, be added to then on the DC charging electric capacity, pass through four IGBT Q1 of control inverter, Q2, Q3 again, Q4 makes direct current become the AC power of required voltage, frequency again.Form three-phase sine-wave behind the folded ripple of output voltage series connection of each power cell, be used for driving high-tension motor.This moment, electric energy was added on the motor through high voltage converter by electrical network, and motor operates in first, third quadrant, and high voltage converter is operated in rectification state.
When motor was operated in on-position, the energy that the motor generator operation produces fed back to dc bus by single-phase bridge H type inverter.When DC bus-bar voltage surpasses set point, by six IGBT T1 of control Three-Phase PWM Rectifier, T2, T3, T4, T5, the break-make of T6, make power cell be in the inversion operating state, the simultaneously phase place and the amplitude of control inverter output voltage, guarantee with the synchronous condition of line voltage under energy is fed back in the electrical network.The energy that the motor generator operation produces flows to electrical network through single-phase bridge H type inverter circuit, middle vertical compression bus and the PWM rectifier and the filter reactor that are operated under the regenerating condition, this moment, electric energy flowed to electrical network by motor through high voltage converter, motor is operated in second, four-quadrant, and frequency converter is operated in inverter mode.And when motor braking moved, the energy of all cascade unit feedbacks all will feed back in the electrical network by the rectification circuit of four-quadrant power cell.So the number of four-quadrant power cell in this novel cascade of power units type high voltage frequency converter energy back feed device should be established according to the maximum feedback energy that part throttle characteristics is established.
Above embodiment is only for the usefulness that the utility model is described; but not to restriction of the present utility model; person skilled in the relevant technique; under the situation that does not break away from spirit and scope of the present utility model; can also make various conversion or modification; therefore all technical schemes that are equal to all fall into protection range of the present utility model.
Claims (5)
1. the energy back feed device based on cascade of power units type high voltage converter is characterized in that, comprising:
Control circuit, rectification circuit, middle straight volt circuit, inverter circuit; Wherein, described rectification circuit adopts the IGBT power device, constitutes Three-Phase PWM Rectifier, and the remaining element of described rectification circuit adopts six diodes, constitutes not control rectifying circuit of three-phase bridge;
Described inverter circuit adopts IGBT to constitute single-phase H type bridge circuit.
2. the energy back feed device based on cascade of power units type high voltage converter according to claim 1 is characterized in that:
The secondary side of phase shifting transformer passes through filter reactor respectively, be connected to each power cell, input side constitutes not control rectifying circuit of three-phase bridge by six diodes, and intermediate circuit constitutes the DC charging part by capacitor, and outlet side constitutes single-phase H type bridge inverter main circuit by four IGBT devices.
3. the energy back feed device based on cascade of power units type high voltage converter is characterized in that, comprising:
Control circuit, rectification circuit, middle straight volt circuit, inverter circuit; Wherein, described rectification circuit adopts six IGBT devices to constitute three-phase PWM rectification and feedback circuit;
Described inverter circuit adopts IGBT to constitute single-phase H type bridge circuit.
4. the energy back feed device based on cascade of power units type high voltage converter according to claim 3 is characterized in that:
The secondary side of phase shifting transformer passes through filter reactor respectively, be connected to each power cell, input side connects and composes three-phase PWM rectification and feedback circuit by six IGBT devices according to three-phase bridge circuit, intermediate circuit constitutes the DC charging part by capacitor, and outlet side constitutes single-phase H type bridge inverter main circuit by four IGBT devices.
5. according to claim 3 or 4 described energy back feed devices, it is characterized in that based on cascade of power units type high voltage converter:
High voltage converter comprises rectification side controller and inversion side controller, after middle vertical compression letter and power current signal are delivered to the rectification side controller, handles IGBT break-make in the output control signal power controlling unit Three-Phase PWM Rectifier through the rectification side controller;
After the rotating speed of motor and voltage signal are delivered to the inversion side controller, handle the break-make of IGBT in the output control signal control inversion side H bridge through the inversion side controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200430800U CN201956961U (en) | 2011-02-22 | 2011-02-22 | Energy feedback device based on power unit cascade type high voltage frequency converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200430800U CN201956961U (en) | 2011-02-22 | 2011-02-22 | Energy feedback device based on power unit cascade type high voltage frequency converter |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102355140A (en) * | 2011-09-08 | 2012-02-15 | 武汉大学 | Concatenated multilevel inverter circuit capable of realizing energy feedback and control method |
| CN102624025A (en) * | 2012-03-20 | 2012-08-01 | 武汉大学 | A composite unit cascaded multi-level inverter circuit energy feedback device and its control method |
| CN102882416A (en) * | 2012-10-19 | 2013-01-16 | 株洲变流技术国家工程研究中心有限公司 | High-voltage frequency converter topology circuit and basic converter chain circuit |
| CN102998549A (en) * | 2012-07-10 | 2013-03-27 | 辽宁荣信电气传动技术有限责任公司 | H-bridge based single-phase low voltage ride-through test bed |
| CN105305486A (en) * | 2015-10-19 | 2016-02-03 | 株洲变流技术国家工程研究中心有限公司 | Power unit based cascaded high-voltage frequency converter energy feedback device |
| CN105356787A (en) * | 2015-06-30 | 2016-02-24 | 焦作市明株自动化工程有限责任公司 | Low frequency feedback control unit applied to frequency converter rectifying side |
| CN104506112B (en) * | 2015-01-16 | 2017-12-29 | 中南林业科技大学 | A kind of unit cascaded type frequency converter based on DSP and FPGA |
-
2011
- 2011-02-22 CN CN2011200430800U patent/CN201956961U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102355140A (en) * | 2011-09-08 | 2012-02-15 | 武汉大学 | Concatenated multilevel inverter circuit capable of realizing energy feedback and control method |
| CN102624025A (en) * | 2012-03-20 | 2012-08-01 | 武汉大学 | A composite unit cascaded multi-level inverter circuit energy feedback device and its control method |
| CN102998549A (en) * | 2012-07-10 | 2013-03-27 | 辽宁荣信电气传动技术有限责任公司 | H-bridge based single-phase low voltage ride-through test bed |
| CN102882416A (en) * | 2012-10-19 | 2013-01-16 | 株洲变流技术国家工程研究中心有限公司 | High-voltage frequency converter topology circuit and basic converter chain circuit |
| CN102882416B (en) * | 2012-10-19 | 2016-02-10 | 株洲变流技术国家工程研究中心有限公司 | A kind of high voltage converter topological circuit and basic unsteady flow chain circuit |
| CN104506112B (en) * | 2015-01-16 | 2017-12-29 | 中南林业科技大学 | A kind of unit cascaded type frequency converter based on DSP and FPGA |
| CN105356787A (en) * | 2015-06-30 | 2016-02-24 | 焦作市明株自动化工程有限责任公司 | Low frequency feedback control unit applied to frequency converter rectifying side |
| CN105305486A (en) * | 2015-10-19 | 2016-02-03 | 株洲变流技术国家工程研究中心有限公司 | Power unit based cascaded high-voltage frequency converter energy feedback device |
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| 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: 20110831 Termination date: 20160222 |