CN201398174Y - Power saving device special for asynchronous motor - Google Patents
Power saving device special for asynchronous motor Download PDFInfo
- Publication number
- CN201398174Y CN201398174Y CN2009201169219U CN200920116921U CN201398174Y CN 201398174 Y CN201398174 Y CN 201398174Y CN 2009201169219 U CN2009201169219 U CN 2009201169219U CN 200920116921 U CN200920116921 U CN 200920116921U CN 201398174 Y CN201398174 Y CN 201398174Y
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- 230000005611 electricity Effects 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 5
- 230000005855 radiation Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000002314 autoradiolysis reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000010010 raising Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000009466 transformation Effects 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
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model relates to a power saving device for an asynchronous motor, which mainly consists of a circuit breaker, a master control portion and a motor. Three-phase electric power is connectedwith an input end of the circuit breaker, one circuit of an output end of the circuit breaker passes through an input filter, a rectifying circuit, a filtering circuit, a brake unit and an inverter circuit of the master control portion are connected with an input end of the output filter, an output end of the input filter is connected with the motor through a contactor I, and another circuit of the output end of the circuit breaker is connected with the motor through a contactor II. The power saving device special for an asynchronous motor has the advantages of utilizing variable frequency added with a filter special for input and output and enabling higher harmonic generated by the variable frequency to be filtered by the filter, can collect flow signals through a transmitter to achieve intelligent closed loop control, does not need to be watched by persons, can convert frequency, filter and increase power factors, more effectively saves electricity, protects the motor and prolongs the service life of the motor. Further, the power saving device further has an internal mains supply switching function to be capable of automatically switching to a mains supply state when an internalunit module is broken down, and does not affect normal operation of the motor.
Description
Technical field
The utility model relates generally to the battery saving arrangement field, mainly is a kind of asynchronous machine private section electric installation.
Background technology
More existing enterprises all can be greater than the demand in producing when motor disposes, if blower fan, pump-type load, its operational mode all is whole city's electricity condition operation, regulates flow by valve, satisfies production technology.The control device of this backwardness has not only been wasted manpower greatly, has also consumed many unnecessary electric energy.Though converter plant has been installed additional to motor in some enterprises, just be fixed on a certain frequency operation also, do not reach desirable energy-conservation human-saving effect.And the high order harmonic component that frequency converter produced more can be polluted whole power grid quality.
Existing factory to the Energy Saving Control of asynchronous machine except changing new-type, comparatively energy-conservation motor, utilize following two kinds of power save modes nothing more than: one for improving power factor, in alternating current circuit, supply with the electrical power of motor by power supply, reactive power mainly shows the harmful effect that supplies, the electricity consumption generation is certain: reduce the output of generator active power; Reduce power supply capacity defeated, converting equipment; Cause the increase of line voltage distribution loss increase and electric energy loss; Cause low power factor operation and voltage to descend, capacity motor is not in full use.Two for being to install frequency-changing control system on motor additional.By the running speed of real time altering motor, when satisfying technological requirement, reach the purpose of energy savings.Yet frequency converter in use can produce a lot of interference electromagnetic waves, these frequency electromagnetic waves have certain interference near instrument, instrument, and can produce high order harmonic component, this high order harmonic component can enter whole supply network by current supply circuit, thereby influences other instrument.
Summary of the invention
The utility model will solve the shortcoming of above-mentioned prior art, provides a kind of simple in structure, but the asynchronous machine private section electric installation of efficient energy-saving.
The utility model solves the technical scheme that its technical problem adopts: this asynchronous machine private section electric installation, mainly comprise circuit breaker, main control part and motor, three-phase electricity is connected with the input of circuit breaker, the output of circuit breaker is leaded up to input filter, the rectification circuit of main control part, filter circuit, brake unit, inverter circuit are connected with the input of output filter, and the output of output filter is connected with motor by contactor I; Another road of the output of circuit breaker is connected with motor by contactor II.
Described main control part mainly comprises man-machine interface and control system, and man-machine interface links to each other with control system, and control system connects control rectification circuit and inverter circuit, is provided with filter circuit and brake unit between rectification circuit and the inverter circuit.
Be provided with mechanical interlock between described contactor I and the contactor II, and be used to save/change over switch that civil power switches.
Be connected with the time relay between described contactor I and the motor.
The effect that the utility model is useful is: adopt frequency conversion to add input, output special filter, the filtered device of the high order harmonic component that frequency conversion is produced filters.And, reach intelligent closed-loop control by transmitter collection flow signal.Need not manually to guard, can carry out frequency conversion, filtering, raising power factor power supply, more effective saves energy, the protection motor prolongs motor useful life.Also possess inner civil power handoff functionality,, do not influence the motor operate as normal in case the internal element module can automatically switch to city's electricity condition when breaking down.
Description of drawings
Fig. 1 is the utility model circuit theory diagrams;
Description of reference numerals: circuit breaker 1, input filter 2, rectification circuit 3, filter circuit 4, brake unit 5, inverter circuit 6, control system 7, man-machine interface 8, output filter 9, contactor I 10, contactor II 11, main control part 12, motor 13, change over switch 14, the time relay 15.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
As shown in the figure, this asynchronous machine private section electric installation, mainly comprise circuit breaker 1, main control part 12 and motor 13, described main control part 12 mainly comprises man-machine interface 8 and control system 7, man-machine interface 8 links to each other with control system 7, control system 7 connects control rectification circuit 3 and inverter circuit 6, is provided with filter circuit 4 and brake unit 5 between rectification circuit 3 and the inverter circuit 6.Main control part 12 two ends are connected with input filter 2 and output filter 9, make the power supply wave shape through rectification and inversion approach Zheng Xian ripple.Three-phase electricity is connected with the input of circuit breaker 1, the output of circuit breaker 1 is leaded up to input filter 2, the rectification circuit 3 of main control part 12, filter circuit 4, brake unit 5, inverter circuit 6 are connected with the input of output filter 9, and the output of output filter 9 is connected with motor 13 by contactor I 10; Another road of the output of circuit breaker 1 is connected with motor 13 by contactor II 11.Be provided with mechanical interlock between described contactor I 10 and the contactor II 11, and be used to save/change over switch 14 that civil power switches, be connected with the time relay 15 between described contactor I 10 and the motor 13, in order to time-delay power supply, to prevent motor 13 from not stopping fully to the impact of battery saving arrangement.
The filter effect reduces power supply exactly to be disturbed, and the power supply interference can be divided into two classes: general mode and common pattern.General mode is two groups of noises between the input power cord, and this noise normally produces when shutdown and start.And common pattern is meant because equipment imperfect earth, again or initiations such as broadcast radio and motor electromagnetism.
It is exactly to have comprised many variable factors that power supply disturbs one of reason of complexity.At first, power supply disturbs and can exist in " common mode " and " differential mode " mode." common mode " disturbed and is meant power line to the earth, or center line is to the potential difference between the earth.For three-phase circuit, common mode disturbances is present between any phase and the earth.Common mode disturbances is also referred to as longitudinal mode interference, asymmetric interference or ground connection sometimes and disturbs, and this is that potential difference causes between current and the earth." differential mode " disturbs and is present between power supply phase line and the center line.Concerning three-phase circuit, also be present between phase line and the phase line.Differential mode interference is also referred to as norm interference, series mode interference, transverse mode sometimes and disturbs or symmetric disturbance, and this is that potential difference between the current causes.
The pattern of disturbing has provided the relation between interference source and the coupling path: differential mode interference has been pointed out to disturb and has been come from same power circuit; Common mode disturbances has then been pointed out and has been disturbed autoradiolysis or crosstalk couplings.
It mainly is the noise of the following frequency range of 30MHz that power-supply filter generally is used for suppressing.But to the interference more than the 30MHz is that the radiated emission interference also has certain inhibitory action, rule of thumb, roughly can be divided into 3 frequency ranges again in this frequency range: below 5KHz, mainly be to suppress the measure of differential mode interference; In the 5kHZ-1MHZ scope, mainly be to suppress the measure of common mode disturbances; In the 1MHZ-30MHZ scope, except that main inhibition common mode disturbances, note also with on every side electromagnetic wave coupled problem and according to circumstances consider to add auxiliary inhibition means such as ground wire grounded, inductance.For the high frequency characteristics that then will consider filter of frequency more than 30MHZ.
A lot of people think that the effect of filter is to make equipment can satisfy in the electromagnetic compatibility standard requirement to conduction emission and conducted susceptibility, but this is incomplete.The EMI power-supply filter is also very important than intense radiation interference aspect to the suppression equipment generation, and proper explanations is: filter can prevent that the interference that equipment itself produces from entering power line, prevents the interference access arrangement on the power line simultaneously.
In the high speed circuit,, when the high frequency conduction current is arranged on the cable, can produce strong radiation, make equipment can not satisfy the requirement of radiated emission because the cable on the equipment is a radiating antenna efficiently; In like manner, this situation often takes place when on the power line hf interference current being arranged, and all is pulse signal as the Switching Power Supply signal, and the frequency of its harmonic component is very high, often also can produce radiation greater than 30MHZ, and radiated emission exceeds standard.To notice that especially the conduction emission is qualified in the test, and radiated emission is when defective, do not forget the common mode current of checking on the power line, many times exceeding standard of radiated emission is because the common mode current on the power line causes, thus the high frequency of EMI power-supply filter to insert people's loss be very important.
The JLD filter is a kind of passive low ventilating filter, and filter is based on frequency converter in when work, and electrical network and other digital electronic device are produced the spectrum component Electro Magnetic Compatibility characteristics disturbed and custom-designed.Can not only effectively suppress the conducted interference propagated along power line, also can reduce the radiated interference that electronic equipment produces simultaneously greatly, material therefor and parts were all tested through adverse circumstances, and it is little to have size, need not fan, installs on the spot, easy to operate.
The JLD input filter is to be connected between the inlet wire side and power supply of energy-saving device main frame, the noise jamming that suppresses the high order harmonic component in the input of energy-saving device main frame, suppress extraneous radio interference and temporary impact, surge is to the interference of energy-saving device main frame, possess the effect of line filter and radiation filtering, have good common mode and differential mode interference and suppress ability.
The JLD output filter is installed between the outlet side and motor of energy-saving device main frame, be used for reducing the high order harmonic component composition of output current, suppress the surge voltage of the outlet side of energy-saving device main frame, reduce motor, reduce motor noise by the additional torque that high-frequency harmonic causes.
Operation principle: after three-phase electricity was advanced circuit breaker 1, the one road to input filter 2, through main control part rectification circuit 3, filter circuit 4, brake unit 5, inverter circuit 6, crossed output filter 9 then, after contactor II 10 is transported to motor 13.Contactor I 11 is directly crossed on another road, is transported to motor 13.Wherein have mechanical interlocked between contactor I 10 and the contactor II 11, prevent that its adhesive simultaneously from causing fault, and adopt change over switch 14 that it is saved/the civil power switching, when switching to electricity-saving state by civil power, also by the time relay 15 time-delay adhesives, in case motor 13 when not stopping fully with regard to starting battery saving arrangement initiating failure.
In addition to the implementation, all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection range of the utility model requirement.
Claims (4)
1, a kind of asynchronous machine private section electric installation, mainly comprise circuit breaker (1), main control part (12) and motor (13), it is characterized in that: three-phase electricity is connected with the input of circuit breaker (1), the output of circuit breaker (1) is leaded up to input filter (2), the rectification circuit (3) of main control part (12), filter circuit (4), brake unit (5), inverter circuit (6) are connected with the input of output filter (9), and the output of output filter (9) is connected with motor (13) by contactor I (10); Another road of output of circuit breaker (1) is connected with motor (13) by contactor II (11).
2, asynchronous machine private section electric installation according to claim 1, it is characterized in that: described main control part (12) mainly comprises man-machine interface (8) and control system (7), man-machine interface (8) links to each other with control system (7), control system (7) connects control rectification circuit (3) and inverter circuit (6), is provided with filter circuit (4) and brake unit (5) between rectification circuit (3) and the inverter circuit (6).
3, asynchronous machine private section electric installation according to claim 1 is characterized in that: be provided with mechanical interlock between described contactor I (10) and the contactor II (11), and be used to save/change over switch (14) that civil power switches.
4, according to claim 1 or 3 described asynchronous machine private section electric installations, it is characterized in that: be connected with the time relay (15) between described contactor I (10) and the motor (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201169219U CN201398174Y (en) | 2009-03-31 | 2009-03-31 | Power saving device special for asynchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201169219U CN201398174Y (en) | 2009-03-31 | 2009-03-31 | Power saving device special for asynchronous motor |
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| Publication Number | Publication Date |
|---|---|
| CN201398174Y true CN201398174Y (en) | 2010-02-03 |
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| CN2009201169219U Expired - Fee Related CN201398174Y (en) | 2009-03-31 | 2009-03-31 | Power saving device special for asynchronous motor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032161A (en) * | 2010-10-08 | 2011-04-27 | 上海山社电子科技有限公司 | Energy-saving control system of air compressor |
| CN102299517A (en) * | 2011-09-13 | 2011-12-28 | 河海大学常州校区 | Industrial harmonic-eliminating filtering energy-saving device and method |
| CN102857153A (en) * | 2012-08-31 | 2013-01-02 | 北京山崎电气设备有限公司 | Energy-saving stability controller |
| WO2014019509A1 (en) * | 2012-07-31 | 2014-02-06 | 施耐德东芝换流器欧洲公司 | Motion and control system |
-
2009
- 2009-03-31 CN CN2009201169219U patent/CN201398174Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032161A (en) * | 2010-10-08 | 2011-04-27 | 上海山社电子科技有限公司 | Energy-saving control system of air compressor |
| CN102299517A (en) * | 2011-09-13 | 2011-12-28 | 河海大学常州校区 | Industrial harmonic-eliminating filtering energy-saving device and method |
| CN102299517B (en) * | 2011-09-13 | 2013-04-24 | 河海大学常州校区 | Industrial harmonic-eliminating filtering energy-saving device and method |
| WO2014019509A1 (en) * | 2012-07-31 | 2014-02-06 | 施耐德东芝换流器欧洲公司 | Motion and control system |
| CN103580553A (en) * | 2012-07-31 | 2014-02-12 | 施耐德东芝换流器欧洲公司 | Movement and control system |
| CN102857153A (en) * | 2012-08-31 | 2013-01-02 | 北京山崎电气设备有限公司 | Energy-saving stability controller |
| CN102857153B (en) * | 2012-08-31 | 2015-12-09 | 北京山崎电气设备有限公司 | A kind of energy-conservation steady control device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100203 Termination date: 20130331 |