CN101964528A - Intelligent power-saving device - Google Patents
Intelligent power-saving device Download PDFInfo
- Publication number
- CN101964528A CN101964528A CN2010102603842A CN201010260384A CN101964528A CN 101964528 A CN101964528 A CN 101964528A CN 2010102603842 A CN2010102603842 A CN 2010102603842A CN 201010260384 A CN201010260384 A CN 201010260384A CN 101964528 A CN101964528 A CN 101964528A
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- China
- Prior art keywords
- circuit
- motor
- control unit
- power
- saving device
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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
- Y02E40/40—Arrangements for reducing harmonics
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Abstract
The invention discloses an intelligent power-saving device, and belongs to the technical field of energy conservation of motors. The device comprises a rectification circuit (1), an inverter module and drive circuit (2), a main CPU control unit (3), a filter circuit (4), a power frequency bypass circuit (5), a motor U-shaped curve detection unit (6), a self-learning correction unit (7) and a harmonic administration unit (8), wherein the rectification circuit (1) is connected with a motor through the filter circuit (4) and the inverter module and drive circuit (2) in turn; both the main CPU control unit (3) and the power frequency bypass circuit (5) are connected with the inverter module and drive circuit (2); and the harmonic administration unit (8) is connected with the input end of the rectification circuit (1). The intelligent power-saving device is simple and convenient to assemble, has remarkable power-saving effect, and can realize power grid harmonic administration on line.
Description
Technical field
The invention discloses a kind of intelligent electric-saving device, belong to the energy saving motor technical field, specifically be meant a kind of alternating current motor intelligent electric-saving device.
Background technology
The common battery saving arrangement major part of industrial motor is to adopt controllable silicon that motor is carried out voltage-regulation.Traditional electric moter voltage power-saving technique is the supply voltage of motor to be carried out copped wave with controllable silicon regulate, and artificial causes periodic instantaneous power failure, reduces power of motor.Reach purpose to motor power saving.This mode will cause the motor carrying load ability to descend.Traditional electric moter voltage power-saving technique is static Power Regulation technology, can only dateout be set according to the specified parameter of electric machine.Do not consider by motor actual energy U-shaped curve output motor power, can't make the motor all-the-time stable operate in most effective point. every motor all has a cover nominal parameter and an actual parameter, actual parameter can change along with motor running time and operating mode, and gap is increasing.Therefore, only rely on nominal parameter to come motor is carried out the Power Regulation economize on electricity, effect can be worse and worse.
In addition, traditional electric moter voltage power-saving technique will bring current harmonics to electrical network in Power Regulation, cause electric energy loss, produce harm.
Along with the difference that load-rate of motor changes, motor is when different voltage inputs, and spent power is different.And along with difference service time of motor, motor can wear out, and relevant parameter also can be along with variation.If press the optimum coupling parameters of electric power of energy U-shaped curve output dynamically can for motor, motor will operate under the state of power hungry minimum.When motor is in the often conversion of load size, when certain light running time state is arranged, power savings will be very remarkable.
Summary of the invention
The objective of the invention is to have overcome above-mentioned shortcoming of the prior art, provide a kind of simple and practical, cost is lower, can the fully automatic operation scope of application intelligent electric-saving device comparatively widely.
In order to realize above-mentioned purpose, intelligent electric-saving device of the present invention has following formation:
This intelligent electric-saving device, comprise rectification circuit (1), inversion module and drive circuit (2), host CPU control unit (3), filter circuit (4), power frequency bypass circuit (5), motor U-shaped curve detection unit (6), self study amending unit (7), described rectification circuit (1) is successively by filter circuit (4), inversion module and drive circuit (2) are connected with motor, described host CPU control unit (3) all is connected with described inversion module and drive circuit (2) with power frequency bypass circuit (5), described motor U-shaped curve detection unit (6) all is connected with the input of described host CPU control unit (3) with self study amending unit (7), it is characterized in that, described intelligent electric-saving device also comprises harmonic wave control unit (8), and described harmonic wave control unit (8) is connected with the input of rectification circuit (1).
Adopted the intelligent electric-saving device of this invention, pressed the optimum coupling parameters of electric power of energy U-shaped curve output dynamically not only can for motor, and can be implemented in line harmonics improvement, the electric energy loss that harmonic carcellation produces.Thereby this battery saving arrangement is with respect to existing power-saving technique, with the power savings that additionally increases by 3%～6%, battery saving arrangement of the present invention does not influence the use of motor operate as normal simultaneously, simple installation, metering is directly perceived, possesses good economic benefit and social benefit, and it is simple and practical, cost is lower, can fully automatic operation, and the scope of application is comparatively extensive.
Description of drawings
Accompanying drawing is the operation principle block diagram of intelligent electric-saving device of the present invention.
Embodiment
In order more to be expressly understood technology contents of the present invention, describe in detail especially exemplified by following examples.
See also shown in the accompanying drawing, in specific embodiments of the invention, to exchange 380V 50Hz 55kw asynchronous motor is reference, the present invention includes: rectification circuit (1), inversion module and drive circuit (2), host CPU control unit (3), filter circuit (4), power frequency bypass circuit (5), motor U-shaped curve detection unit (6), self study amending unit (7), harmonic wave control unit (8), described rectification circuit (1) is successively by filter circuit (4), inversion module and drive circuit (2) are connected with motor, described host CPU control unit (3) all is connected with described inversion module and drive circuit (2) with power frequency bypass circuit (5), described motor U-shaped curve detection unit (6) all is connected with the input of described host CPU control unit (3) with self study amending unit (7), and described harmonic wave control unit (8) is connected with the input of rectification circuit (1).
Power supply enters harmonic wave control unit (8) through rectification circuit (1) input, harmonic wave control unit (8) is the detection of grid harmonic component in real time, after carrying out computing, export reverse harmonic current or formation specific times harmonic electric current notch situation to power supply, thereby reduce the mains by harmonics loss, produce extra power savings.
Power supply is after rectification circuit (1) carries out the AC/DC conversion, by filter circuit (4) direct current after the conversion is carried out real-time dynamic process, six times of pulsating voltages to supply frequency are changed to high pressure 500V direct current, this direct voltage is added on inversion module and the drive circuit (2), through host CPU control unit (3) output 3 heavy pwm pulses, the PWM form is output high-frequency signal (10～35KHZ), form the dynamic PWM pulse voltage, the DC/AC inverter output in inverter circuit and the drive circuit (2) meets voltage, frequency and the waveform of motor U-shaped curve.Motor U-shaped curve detection unit (6) sent instruction every 100 hours, gathered instantaneous values such as current current of electric voltage power factor and calculated active power, and nominal parameter is compared.Self study amending unit (7) was regularly revised by the motor operation in 100 hours, provide host CPU control unit (3) signal, voltage, frequency and the waveform of motor output carried out the examination output of 5 groups of signals of the positive and negative one thousandth of deviation, and record compares 3 groups of variable power that signal is different, get the minimum power corresponding parameters as the new U-shaped energy curve corresponding points of motor,, export in the cycle of operation at 100 hours next time motors by this new U-shaped energy curve.When economize on electricity output is broken down, can be manually or start power frequency bypass circuit (5) automatically, can make motor operate as normal again.
This battery saving arrangement is with respect to existing power-saving technique, with the power savings that additionally increases by 3%～6%, battery saving arrangement of the present invention does not influence the use of motor operate as normal simultaneously, simple installation, metering is directly perceived, possesses good economic benefit and social benefit, and it is simple and practical, cost is lower, can fully automatic operation, and the scope of application is comparatively extensive.
In this specification, the present invention is described with reference to its certain embodiments.But, still can make various modifications and conversion obviously and not deviate from the spirit and scope of the present invention.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (2)
1. intelligent electric-saving device, comprise rectification circuit (1), inversion module and drive circuit (2), host CPU control unit (3), filter circuit (4), power frequency bypass circuit (5), motor U-shaped curve detection unit (6), self study amending unit (7), described rectification circuit (1) is successively by filter circuit (4), inversion module and drive circuit (2) are connected with motor, described host CPU control unit (3) all is connected with described inversion module and drive circuit (2) with power frequency bypass circuit (5), described motor U-shaped curve detection unit (6) all is connected with the input of described host CPU control unit (3) with self study amending unit (7), it is characterized in that, described intelligent electric-saving device also comprises harmonic wave control unit (8), and described harmonic wave control unit (8) is connected with the input of rectification circuit (1).
2. intelligent electric-saving device according to claim 1 is characterized in that, the current harmonics abatement device in the described harmonic wave control unit (8) adopts shunt active power filter or parallel connection type passive filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102603842A CN101964528A (en) | 2010-08-23 | 2010-08-23 | Intelligent power-saving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102603842A CN101964528A (en) | 2010-08-23 | 2010-08-23 | Intelligent power-saving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101964528A true CN101964528A (en) | 2011-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102603842A Pending CN101964528A (en) | 2010-08-23 | 2010-08-23 | Intelligent power-saving device |
Country Status (1)
| Country | Link |
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| CN (1) | CN101964528A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420563A (en) * | 2011-12-19 | 2012-04-18 | 广州智光电机有限公司 | Intelligent bypass system for high-voltage frequency converter |
| CN104124693A (en) * | 2013-04-28 | 2014-10-29 | 长春理工大学 | Three-phase motor power supply energy-saving device |
| CN104213597A (en) * | 2014-08-26 | 2014-12-17 | 徐州徐工挖掘机械有限公司 | Alternating-current variable-frequency speed-regulating control system for electro-hydraulic excavator |
-
2010
- 2010-08-23 CN CN2010102603842A patent/CN101964528A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420563A (en) * | 2011-12-19 | 2012-04-18 | 广州智光电机有限公司 | Intelligent bypass system for high-voltage frequency converter |
| CN102420563B (en) * | 2011-12-19 | 2015-03-04 | 广州智光电机有限公司 | Intelligent bypass system for high-voltage frequency converter |
| CN104124693A (en) * | 2013-04-28 | 2014-10-29 | 长春理工大学 | Three-phase motor power supply energy-saving device |
| CN104124693B (en) * | 2013-04-28 | 2016-05-11 | 长春理工大学 | A kind of three phase electric machine power supply energy-saving device |
| CN104213597A (en) * | 2014-08-26 | 2014-12-17 | 徐州徐工挖掘机械有限公司 | Alternating-current variable-frequency speed-regulating control system for electro-hydraulic excavator |
| CN104213597B (en) * | 2014-08-26 | 2017-04-26 | 徐州徐工挖掘机械有限公司 | Alternating-current variable-frequency speed-regulating control system for electro-hydraulic excavator |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110202 |