CN107517009A - A kind of frequency converter - Google Patents
A kind of frequency converter Download PDFInfo
- Publication number
- CN107517009A CN107517009A CN201710919723.5A CN201710919723A CN107517009A CN 107517009 A CN107517009 A CN 107517009A CN 201710919723 A CN201710919723 A CN 201710919723A CN 107517009 A CN107517009 A CN 107517009A
- Authority
- CN
- China
- Prior art keywords
- reactor
- frequency converter
- loop
- housing
- cooling fan
- 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
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention provides a kind of frequency converter, including housing, frequency transformation device, reactor and cooling fan are installed in housing, cooling fan is arranged at one end in housing, DC loop is provided with frequency converter, the positive pole series winding reactor of DC loop, reactor is composed in parallel by some standard direct current reactance, after employing frequency converter provided by the present invention, the overall physical size of reactor is smaller, and installation is lighter, beneficial to product high-volume and standardized production, it is also beneficial to production with material supply to prepare, is easy to implement lean production.
Description
Technical field
The present invention relates to electric control appliance field, more specifically to a kind of frequency converter with reactor.
Background technology
Frequency converter (Variable-frequency Drive, VFD) is to apply converter technique and microelectric technique, by changing
Become motor working power Frequency Patterns to control the electric control appliance of ac motor, its main circuit is typically including direct current
Road and alternating current circuit, outside input 380V/50Hz power frequency supply is rectified into DC voltage through three-phase bridge, and then inversion is frequency
The variable alternating voltage of rate.In commutating circuit, the waveform of input current is irregular square wave, and waveform presses fourier series
Fundamental wave and each harmonic are decomposed into, overtone order is usually 6n ± 1 time higher hamonic wave, and higher hamonic wave therein supplies exogenous disturbances
Electric system.
Generally, the harmonics of inverter effect on power system relatively large to capacity be not apparent；It is and small to capacity
Power system, interference caused by harmonics of inverter is just very important, and it is also a kind of pollution to utility network, and harmonics of inverter is dirty
The harm contaminated to power system is serious, is mainly manifested in the following aspects：
(1) harmonics of inverter reduces power equipment service life；
(2) harmonics of inverter influences each electric elements normal work；
(3) other harm of harmonics of inverter.
At present in the frequency conversion series of products of power electronics switch technology suppress the design of harmonic wave, reactor is connected on whole
By as the means most generally used in individual frequency conversion electric loop, frequency converter can be reduced due to reducing reactor individual amount
Cost, therefore the method that each manufacturer is usually chosen in current-limiting reactor in DC loop in recent years, and wherein in DC loop
Positive pole on the anti-use of single direct current of connecting it is particularly extensive.
Because DC loop current is larger, traditional single direct current reactor is because for the need for meeting electric current-carrying and safety
Often there is certain physical section product and larger volume, such reactance is increased heat-resisting usually using fine copper platinum, silicon steel sheet
Insulating paper isolates coiling, and this just makes it have larger volume and also brings higher cost of manufacture, meanwhile, larger volume can make
The copper platinum radiating of reactance winding innermost layer is difficult.
The content of the invention
The main object of the present invention solves the direct current reactor physics being connected in the prior art on the positive pole of DC loop
Volume is larger, the technical problem for the difficulty that radiates.
In order to solve the above technical problems, the invention provides a kind of frequency converter, including housing, it is provided with the housing
Frequency transformation device, reactor and cooling fan, the cooling fan are arranged at one end in the housing, set in the frequency converter
DC loop is equipped with, the positive pole series winding reactor of the DC loop, the reactor is by more than two standard direct currents
Reactance composes in parallel.
Optionally, the reactor is series on the positive pole and/or negative pole of the DC loop.
Optionally, the reactor is located at one end corresponding to the cooling fan, the frequency transformation in the housing
Device is installed between the reactor and the cooling fan.
After employing frequency converter provided by the present invention, the present invention is mainly by by after several standard direct current reactance parallel connections
It is overall again to connect on DC loop positive pole, make the overall physical size of reactor smaller, installation is lighter, saves frequency converter
Manufacturing cost.
Brief description of the drawings
Accompanying drawing is for providing a further understanding of the present invention, and a part for constitution instruction, with following tool
Body embodiment is used to explain the present invention together, but should not form the limitation of the present invention, in the accompanying drawings：
Fig. 1 is the structural representation of frequency converter of the embodiment of the present invention；
Fig. 2 is the structural representation of reactor of the embodiment of the present invention；
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
As shown in Figure 1 and Figure 2, the invention provides a kind of frequency converter 100, including housing 110, frequency is installed in housing 110
Rate transformation device 120, reactor 130 and cooling fan 140, cooling fan 140 are arranged at one end in housing 110, frequency converter 110
DC loop is inside provided with, reactor 130 of being contacted on DC loop, reactor 130 is by more than two standard direct current reactance 131
Compose in parallel, wherein, reactor is series on the positive pole and/or negative pole of the DC loop.
After employing frequency converter provided by the present invention, the present invention is mainly by by after several standard direct current reactance parallel connections
It is overall again to connect on DC loop positive pole, make the overall physical size of reactor smaller, installation is lighter, saves and is manufactured into
This, in addition, frequency converter is in the intersegmental direct current reactor that need to design different capacity size of different capacity in the prior art, according to difference
Type needs manufacture or purchased the different direct current reactor of watt level, in the present invention it is possible to by manufacturing using parallel connection more
The way of multiple standard direct current reactance obtains different inductance values and corresponding different current capacity.
As shown in figure 1, reactor 130 is located at one end corresponding to cooling fan 140, frequency transformation device in housing 110
120 are installed between reactor 130 and cooling fan 140, because the overall physical size of reactor is smaller, the sky of heat dissipation wind channel
Between it is bigger, frequency transformation device is installed between reactor and cooling fan, the radiating effect of whole frequency converter can be made more
Good, so as to accomplish the more compact structure of separate unit frequency converter, the radiating of inductance is more excellent, organization of production is easier.
Embodiments of the present invention are explained in detail above in association with accompanying drawing, but the invention is not restricted to described implementation
Mode.For a person skilled in the art, in the case where not departing from the principle of the invention and spirit, to these embodiments
A variety of modifications, replacement and modification are carried out, is still fallen within protection scope of the present invention.
Claims (3)
1. a kind of frequency converter, including housing, frequency transformation device, reactor and cooling fan are installed in the housing, it is described
Cooling fan is arranged at one end in the housing, and DC loop is provided with the frequency converter, is connected with the DC loop
The reactor, it is characterised in that the reactor is composed in parallel by more than two standard direct current reactance.
2. frequency converter according to claim 1, it is characterised in that the reactor is series at the positive pole of the DC loop
And/or on negative pole.
3. frequency converter according to claim 1, it is characterised in that the reactor is located at the radiation air in the housing
One end corresponding to machine, the frequency transformation device are installed between the reactor and the cooling fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710919723.5A CN107517009A (en) | 2017-09-30 | 2017-09-30 | A kind of frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710919723.5A CN107517009A (en) | 2017-09-30 | 2017-09-30 | A kind of frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107517009A true CN107517009A (en) | 2017-12-26 |
Family
ID=60727007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710919723.5A Pending CN107517009A (en) | 2017-09-30 | 2017-09-30 | A kind of frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107517009A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1023768A (en) * | 1996-06-28 | 1998-01-23 | Toyo Electric Mfg Co Ltd | Heat sink assembly for cooling power inverter |
| US20150123479A1 (en) * | 2012-08-28 | 2015-05-07 | Hitachi, Ltd. | Power conversion apparatus |
| CN205051560U (en) * | 2015-09-07 | 2016-02-24 | 深圳市英威腾电气股份有限公司 | Frequency converter |
| CN205160377U (en) * | 2015-10-29 | 2016-04-13 | 浙江正泰电器股份有限公司 | Mounting structure of converter |
| CN105591546A (en) * | 2014-10-23 | 2016-05-18 | 黄磊 | Power-frequency boost power supply for field calibration of GIS voltage transformer |
| CN207490767U (en) * | 2017-09-30 | 2018-06-12 | 深圳弘远电气有限公司 | A kind of frequency converter |
-
2017
- 2017-09-30 CN CN201710919723.5A patent/CN107517009A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1023768A (en) * | 1996-06-28 | 1998-01-23 | Toyo Electric Mfg Co Ltd | Heat sink assembly for cooling power inverter |
| US20150123479A1 (en) * | 2012-08-28 | 2015-05-07 | Hitachi, Ltd. | Power conversion apparatus |
| CN105591546A (en) * | 2014-10-23 | 2016-05-18 | 黄磊 | Power-frequency boost power supply for field calibration of GIS voltage transformer |
| CN205051560U (en) * | 2015-09-07 | 2016-02-24 | 深圳市英威腾电气股份有限公司 | Frequency converter |
| CN205160377U (en) * | 2015-10-29 | 2016-04-13 | 浙江正泰电器股份有限公司 | Mounting structure of converter |
| CN207490767U (en) * | 2017-09-30 | 2018-06-12 | 深圳弘远电气有限公司 | A kind of frequency converter |
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