CN105024396A - Energy feedback frequency converter - Google Patents
Energy feedback frequency converter Download PDFInfo
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- CN105024396A CN105024396A CN201410178083.3A CN201410178083A CN105024396A CN 105024396 A CN105024396 A CN 105024396A CN 201410178083 A CN201410178083 A CN 201410178083A CN 105024396 A CN105024396 A CN 105024396A
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- 238000001514 detection method Methods 0.000 claims abstract description 13
- 230000009471 action Effects 0.000 claims abstract description 5
- 230000002457 bidirectional effect Effects 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 5
- 230000010354 integration Effects 0.000 abstract description 4
- 238000010248 power generation Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 2
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- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005381 potential energy 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The invention relates to an energy feedback frequency converter, which comprises a pre-stage circuit, a post-stage circuit, a power grid voltage detection circuit, a bus voltage detection circuit and a control circuit, wherein the post-stage circuit comprises a three-phase inverter and a motor. The energy feedback frequency converter is characterized in that a current sensor and a position sensor are electrically connected between the three-phase inverter and the motor, the three-phase inverter is further electrically connected to a current regulator and a speed regulator, the current sensor is used for transmitting electric signals to the current regulator, and the position sensor is used for transmitting electric signals to the speed regulator. The control circuit is arranged to be used for receiving signals from the power grid voltage detection circuit, the bus voltage detection circuit and a filter so as to control actions of a three-phase controllable rectifier and a two-way switch, and a power factor correction circuit and a feedback inversion power generation function are integrated in one circuit, thereby realizing integration of rectification and inversion, and improving the power factor.
Description
Technical field
The present invention relates to a kind of electric control appliance, be specifically related to a kind of energy feedback frequency converter.
Background technology
Frequency converter is application converter technique and microelectric technique, controls the electric control appliance of alternating current motor by changing machine operation supply frequency mode.Frequency converter is primarily of the composition such as rectification (AC-DC), filtering, inversion (direct current becomes interchange), brake unit, driver element, detecting unit, microprocessing unit.Frequency converter close to the inner portion IGBT cut-off the voltage and the frequency that adjust out-put supply; there is provided the supply voltage needed for it according to the actual demand of motor, so reach energy-conservation, the object of speed governing, in addition; frequency converter also has a lot of defencive functions, as overcurrent, overvoltage, overload protection etc.Variable-frequency control technique is the important channel of saving energy and reduce the cost, improving apparatus control performance, improving output and product quality, has achieved proud effect and significant economic benefit in the application.
But universal frequency converter can not be directly used in the governing system needing Fast starting, fast braking and frequent rotating, which has limited the range of application of universal frequency converter.In the circuit of frequency converter, arrange energy feedback circuit makes energy feed back in AC network, is a kind of the most frequently used solution.This method can improve the utilance of the energy, especially plays braking or the long-term system being with potential energy loading high to transfer to frequent, can produce significant power savings.At present, realize the energy feedback circuit of the integration that energy feedback technology generally adopts three-phase controlled rectifier to form in the world, but there is the shortcomings such as rectification efficiency is not high, device is complicated, cost is high, range of application is limited in this technology.
Summary of the invention
The present invention seeks to provide to overcome the deficiencies in the prior art the energy feedback frequency converter that a kind of rectification efficiency is high, apparatus structure is simple, cost is low.
For achieving the above object, the technical solution adopted in the present invention is: a kind of energy feedback frequency converter, and it comprises:
Front stage circuits, the mid point other end that the three-phase controlled rectifier comprise the first filter of access three phase mains, being electrically connected with filter, the rectilinear generatrix electric capacity be electrically connected with three-phase controlled rectifier, one end are connected respectively to three-phase controlled rectifier brachium pontis is connected to the bidirectional switch of rectilinear generatrix capacitances in series point;
Late-class circuit, comprises the three-phase inverter be electrically connected with rectilinear generatrix electric capacity, the motor be electrically connected with three-phase inverter brachium pontis respectively;
Power grid voltage detection circuit, for measuring line voltage;
Busbar voltage testing circuit, for measuring busbar voltage;
Control circuit, for receiving signal from power grid voltage detection circuit, busbar voltage testing circuit and filter to control the action of three-phase controlled rectifier and bidirectional switch, when busbar voltage is lower than set point, the switch of described three-phase controlled rectifier all disconnects, and powers to after it carries out power factor correction described late-class circuit; When busbar voltage is higher than set point, described three-phase controlled rectifier generates electricity to electrical network feedback with three-phase inverter pattern after carrying out power factor correction;
Also current sensor and position transducer is electrically connected with respectively between described three-phase inverter and motor, described three-phase inverter is also electrically connected with current regulator and speed regulator respectively, described current sensor and current regulator are electrically connected, for transmitting the signal of telecommunication to current regulator; Described position transducer and speed regulator are electrically connected, for transmitting the signal of telecommunication to speed regulator.
Optimally, be also electrically connected with the second filter between described first filter and three-phase controlled rectifier, described first filter and the second filter are electrically connected with straight line current.
Optimally, described three-phase controlled rectifier is anti-and have diode.
Optimally, described motor is vector control electric motor.
Because technique scheme is used, the present invention compared with prior art has following advantages: energy feedback frequency converter of the present invention, by arranging control circuit for receiving from power grid voltage detection circuit, the signal of busbar voltage testing circuit and filter is to control the action of three-phase controlled rectifier and bidirectional switch, circuit of power factor correction, feedback inversion transformation electricity generate function is integrated in a circuit, achieve commutation inversion integration, improve power factor, reduce hardware complexity, reduce system cost, the efficiency of circuit when rectification mode is enhanced.
Accompanying drawing explanation
Accompanying drawing 1 is the circuit structure diagram of energy feedback frequency converter of the present invention;
Accompanying drawing 2 is the permagnetic synchronous motor vector control figure of energy feedback frequency converter of the present invention based on field orientation;
Wherein, 1, front stage circuits; 2, late-class circuit; 3, power grid voltage detection circuit; 4, busbar voltage testing circuit; 5, control circuit.
Embodiment
Energy feedback frequency converter as shown in Figure 1, it comprises: front stage circuits 1, late-class circuit 2, power grid voltage detection circuit 3, busbar voltage testing circuit 4 and control circuit 5.
Front stage circuits 1 comprises the first filter, three-phase controlled rectifier, rectilinear generatrix electric capacity and bidirectional switch.Wherein the first filter is three, is respectively L1, L2 and L3, and one termination enters three phase mains, and the other end is connected respectively to the mid point of three-phase controlled rectifier brachium pontis Q1-Q2, Q3-Q4, Q5-Q6; Rectilinear generatrix electric capacity C4, C5, C6 ... Cn-1 is connected with three-phase controlled rectifier Q1, Q2, Q3, Q4, Q5, Q6 by bus; One end of bidirectional switch K1, K2 and K3 is connected respectively to the mid point of three-phase controlled rectifier brachium pontis Q1-Q2, Q3-Q4, Q5-Q6, and the other end is connected to rectilinear generatrix electric capacity C4, C5, C6 ... Cn-1 series connection point.Late-class circuit 2 comprises three-phase inverter and motor, and three-phase inverter is also connected with three-phase controlled rectifier Q1, Q2, Q3, Q4, Q5, Q6 by bus; Motor M is electrically connected with three-phase inverter brachium pontis respectively.Power grid voltage detection circuit 3, for measuring line voltage; Busbar voltage testing circuit 4, for measuring busbar voltage.Control circuit 5, for receiving signal from power grid voltage detection circuit 3, busbar voltage testing circuit 4 and filter to control the action of three-phase controlled rectifier Q1, Q2, Q3, Q4, Q5, Q6 and bidirectional switch K1, K2 and K3, when busbar voltage is lower than set point, the switch of three-phase controlled rectifier all disconnects, and powers to after it carries out power factor correction late-class circuit 2; When busbar voltage is higher than set point, three-phase controlled rectifier generates electricity to electrical network feedback with three-phase inverter pattern after carrying out power factor correction.This ensure that circuit has high power factor and low harmonic wave at rectification state, reach the object of environmental protection.And circuit is when rectification state, bidirectional switch K1, K2 and K3 only bear the bus voltage value of half, and bidirectional switch K1, K2 and K3 conduction loss of low load voltage value reduces greatly.Energy feedback frequency converter of the present invention is integrated in circuit of power factor correction, feedback inversion transformation electricity generate function in a circuit, achieve commutation inversion integration, the reliability that improve power factor, reduce hardware complexity, reduce system cost, improve circuit, and the efficiency of circuit when rectification mode is enhanced.And as shown in Figure 2, between three-phase inverter and motor M, being also electrically connected with current sensor and position transducer respectively, three-phase inverter is also electrically connected with current regulator and speed regulator respectively; Current sensor and current regulator are electrically connected, for transmitting the signal of telecommunication to current regulator; Position transducer and speed regulator are electrically connected, and for transmitting the signal of telecommunication to speed regulator, thus improve the frequency conversion accuracy of motor, being conducive to conserve energy.
In the present embodiment, second filter L5, L, L6 is also electrically connected with between first filter L1, L2, L3 and three-phase controlled rectifier, first filter L1, L2, L3 and second filter L5, L, L6 is electrically connected with straight line current C1, C2, C3, circuit can be made like this to run more steady.Three-phase controlled rectifier is anti-and have diode, has more diode participation work in circuit, the switching loss of diode, drives loss to obtain larger reduction with conduction loss compared with the switching tube of equal-wattage grade, and circuit rectifies efficiency is improved.And as shown in Figure 2, motor M is vector control electric motor, the governing system of this vector control electric motor is that a kind of based on rotor field-oriented double-closed-loop control scheme, speed ring is master controller, controls motor M rotating speed consistent with given rotating speed; Electric current loop is submaster controller, controls motor M stator current.The governing system of this vector control electric motor has the advantages such as Driving Torque is steady, startability good, speed-regulating range width, is applicable to the system that control performance requirement is higher.
Above-described embodiment is only for illustrating technical conceive of the present invention and feature; its object is to person skilled in the art can be understood content of the present invention and implement according to this; can not limit the scope of the invention with this; all equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (4)
1. an energy feedback frequency converter, it comprises:
Front stage circuits, the mid point other end that the three-phase controlled rectifier comprise the first filter of access three phase mains, being electrically connected with filter, the rectilinear generatrix electric capacity be electrically connected with three-phase controlled rectifier, one end are connected respectively to three-phase controlled rectifier brachium pontis is connected to the bidirectional switch of rectilinear generatrix capacitances in series point;
Late-class circuit, comprises the three-phase inverter be electrically connected with rectilinear generatrix electric capacity, the motor be electrically connected with three-phase inverter brachium pontis respectively;
Power grid voltage detection circuit, for measuring line voltage;
Busbar voltage testing circuit, for measuring busbar voltage;
Control circuit, for receiving signal from power grid voltage detection circuit, busbar voltage testing circuit and filter to control the action of three-phase controlled rectifier and bidirectional switch, when busbar voltage is lower than set point, the switch of described three-phase controlled rectifier all disconnects, and powers to after it carries out power factor correction described late-class circuit; When busbar voltage is higher than set point, described three-phase controlled rectifier generates electricity to electrical network feedback with three-phase inverter pattern after carrying out power factor correction;
It is characterized in that: between described three-phase inverter and motor, be also electrically connected with current sensor and position transducer respectively, described three-phase inverter is also electrically connected with current regulator and speed regulator respectively, described current sensor and current regulator are electrically connected, for transmitting the signal of telecommunication to current regulator; Described position transducer and speed regulator are electrically connected, for transmitting the signal of telecommunication to speed regulator.
2. energy feedback frequency converter according to claim 1, is characterized in that: be also electrically connected with the second filter between described first filter and three-phase controlled rectifier, and described first filter and the second filter are electrically connected with straight line current.
3. energy feedback frequency converter according to claim 1, is characterized in that: described three-phase controlled rectifier is anti-and have diode.
4. energy feedback frequency converter according to claim 1, is characterized in that: described motor is vector control electric motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410178083.3A CN105024396A (en) | 2014-04-29 | 2014-04-29 | Energy feedback frequency converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410178083.3A CN105024396A (en) | 2014-04-29 | 2014-04-29 | Energy feedback frequency converter |
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| CN105024396A true CN105024396A (en) | 2015-11-04 |
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| CN201410178083.3A Pending CN105024396A (en) | 2014-04-29 | 2014-04-29 | Energy feedback frequency converter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105226792A (en) * | 2015-11-10 | 2016-01-06 | 徐勇 | A kind of integrated energy feedback, the converter device of stored energy and emergency power supply function |
| CN107154639A (en) * | 2016-03-02 | 2017-09-12 | 西工大常熟研究院有限公司 | High efficiency commutation inversion integration energy feedback frequency converter |
| CN116545291A (en) * | 2023-04-24 | 2023-08-04 | 无锡凌博电子技术股份有限公司 | Boosting controller of electric vehicle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1949645A (en) * | 2006-10-13 | 2007-04-18 | 杜心林 | Energy feedback power unit |
| CN101119090A (en) * | 2007-06-28 | 2008-02-06 | 北京合康亿盛科技有限公司 | A full digital vector control device for high voltage synchronous motor |
| CN201985778U (en) * | 2011-03-22 | 2011-09-21 | 深圳市英威腾电气股份有限公司 | Main topology circuit of energy feedback all-in-one machine transducer and control system |
| CN203289117U (en) * | 2013-03-21 | 2013-11-13 | 王林兵 | High-efficient rectification and inversion integrated energy feedback system |
| CN103515979A (en) * | 2013-03-21 | 2014-01-15 | 王林兵 | Low-cost single-phase integrated energy feedback system |
| CN103515978A (en) * | 2013-03-21 | 2014-01-15 | 王林兵 | Efficient rectification-inversion-integrated energy feedback system |
-
2014
- 2014-04-29 CN CN201410178083.3A patent/CN105024396A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1949645A (en) * | 2006-10-13 | 2007-04-18 | 杜心林 | Energy feedback power unit |
| CN101119090A (en) * | 2007-06-28 | 2008-02-06 | 北京合康亿盛科技有限公司 | A full digital vector control device for high voltage synchronous motor |
| CN201985778U (en) * | 2011-03-22 | 2011-09-21 | 深圳市英威腾电气股份有限公司 | Main topology circuit of energy feedback all-in-one machine transducer and control system |
| CN203289117U (en) * | 2013-03-21 | 2013-11-13 | 王林兵 | High-efficient rectification and inversion integrated energy feedback system |
| CN103515979A (en) * | 2013-03-21 | 2014-01-15 | 王林兵 | Low-cost single-phase integrated energy feedback system |
| CN103515978A (en) * | 2013-03-21 | 2014-01-15 | 王林兵 | Efficient rectification-inversion-integrated energy feedback system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105226792A (en) * | 2015-11-10 | 2016-01-06 | 徐勇 | A kind of integrated energy feedback, the converter device of stored energy and emergency power supply function |
| CN107154639A (en) * | 2016-03-02 | 2017-09-12 | 西工大常熟研究院有限公司 | High efficiency commutation inversion integration energy feedback frequency converter |
| CN116545291A (en) * | 2023-04-24 | 2023-08-04 | 无锡凌博电子技术股份有限公司 | Boosting controller of electric vehicle |
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Application publication date: 20151104 |