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
  • H02M1/00—Details of apparatus for conversion
  • H02M1/12—Arrangements for reducing harmonics from ac input or output
• • 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
• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
  • H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
  • H03H1/0007—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network of radio frequency interference filters

Definitions

• the invention relates to a device for suppressing high-frequency currents in supply lines of an inverter with egg ner common mode choke having a magnetic core, which is adapted for inductive coupling of the leads
• Such a device is already known for example from DE 197 14 977 B4.
• There is a common mode choke ⁇ written can be suppressed with the high-frequency current components in leads of an inverter.
• the common mode ⁇ throttle has a magnetic core, which is coupled to winding sections of the common mode choke.
• the Wick ⁇ ment sections are connected in series in the leads of the Umrich ⁇ age .
• an in-ductility for example in the form of a throttle in series in the connecting lines can be switched.
• the throttle has a frequency-dependent impedance so that high losses occur at high-frequency currents.
• the chokes or coils must not come to their saturation. However, this increases the requirement and the construction cost, which is placed on such chokes. This applies in particular to phase chokes, which must be designed for the entire phase current, ie for both the fundamental and harmonic components. Phase chokes are therefore usually costly.
• common mode choke are known, which are less bulky Ver ⁇ equal to phase chokes, since the fundamental component of the phase currents of the inverter cancels against ⁇ side.
• the common mode choke still has to be designed for the remaining common mode currents, ie the total non-fundamental frequency current component.
• common mode choke with carried Erd ⁇ conductors are known. In this way it is possible, even the earth conductor of the consumer through the core of Gleichtaktdros- should be waged so that the low-frequency component of equal ⁇ tact streams can be redirected to this short current path to the inverter.
• the common mode choke is then only claimed by the high frequency component of the common mode currents and can be designed accordingly.
• the object of the invention is to provide a device of the type mentioned, in which the current load of the common mode choke is further minimized, the Vor ⁇ direction can be inexpensively and easily integrated into existing systems.
• the invention solves this problem by a Bescliensimpe- danceinheit, which is inductively coupled to the common mode choke and has a frequency-dependent impedance.
• the device is minimized in terms of their construction ⁇ union effort by the common mode choke will be freed by the ⁇ Bescliensimpedanziens of all current components that do not terrial for achieving the required FIL are required.
• This is done by the inductive coupling of the common mode choke with the Bescliensimpe ⁇ danz exotic exotic.
• the magnetic core also serves for the inductive coupling of the leads and the snubber impedance unit.
• This inductive coupling takes place, for example, by means of a snubber winding to which the snubber impedance unit is connected as a load and through which the magnetic core extends. If the snubber impedance unit has a low impedance for certain frequencies, eg for a frequency range, the snubber winding is quasi short-circuited for currents with such a frequency. Currents in the supply lines of the converter with frequencies which lie in the said frequency range therefore unimpededly induce a countercurrent in the circuit winding, which prevents magnetization of the magnetic core.
• the common mode choke can not be driven by currents at such frequencies into saturation because ⁇ ago and can therefore be interpreted expensive and more compact. In other words, only those currents are suppressed by the common mode choke, in which the snubber impedance unit has a high impedance.
• the impedance can be set arbitrarily.
• the size of the common mode choke can be reduced for na ⁇ hezu any applications therefore, without sacrificing the desired filtering effect.
• the wiring impedance unit has at least one coil
• each coil and each capacitor By purposeful Connection of each coil and each capacitor, the desired frequency-dependent current paths can be easily constructed. Coils and capacitors are commercially available, so that the snubber impedance unit remains inexpensive.
• the wiring impedance unit expediently has a parallel resonant circuit.
• a parallel resonant circuit is vor ⁇ geous, if only a certain frequency band of the
• Common mode choke should be filtered out of the supply lines.
• the parallel resonant circuit has only in the Reso ⁇ nanzfrequenz in an appropriately high impedance. Only in this area, therefore, it comes to the magnetization of the magnetic core of the common mode choke. Outside the range of Reso ⁇ nanzfrequenz the impedance of the Bescliensimpedanzawa is comparatively small, so that the magnetic core of the common mode choke of currents which have such a frequency on ⁇ will not be magnetized and therefore not driven into saturation.
• the snubber impedance unit is a series resonant circuit.
• the Impe danz a series resonant circuit has at its Resonanzfre frequency to a minimum. Accordingly, the common mode choke is magnetized only by those currents whose frequency is outside the range of natural resonance of the series resonant circuit.
• Such Bescliensimpedanzawa then be ⁇ Sonder useful when the common mode choke to be protected from certain frequency bands, and when the throttle not to be effective in these frequency bands
• the common mode choke forming for each line to ⁇ from a winding section, wherein the Wicklungsab ⁇ sections are coupled via the magnetic core inductively with each other. This corresponds to the usual structure of a
• Winding sections are serially connected to the leads ⁇ ver.
• the snubber impedance unit is inductively coupled to the common mode choke via at least one snubber impedance connection line.
• the Bescliensimpedanzver- connecting line expediently forms at least one conductor ⁇ loop, through which extends the magnetic core of the common mode choke.
• the BescliensimpedanzENSs grisps, a circuit winding with multiple winding loops.
• the figure shows schematically an embodiment of he ⁇ inventive device 1.
• the device 1 has a common mode choke 2, of which only the magnetic core 3 is shown.
• the common-mode choke 2 has three phase windings which can each be connected in series in an AC-side supply phase of an inverter.
• the three winding sections are inductively coupled to each other via the magnetic core 3.
• common-mode chokes and the inductive coupling of the phase windings ensures that the fundamental wave components are ⁇ extinguished due to the autogenous counter clock and not magnetize the magnetic core.
• the windings of the smoothing choke can accordingly be made less bulky.
• the total current flowing through the three winding sections in the supply lines is schematically indicated by a simple arrow, which is referenced by I z .
• a Bescliensimpe- danziens 4 is inductively coupled to the magnetic core 3 of the counter mode choke. 2
• the snubber impedance unit 4 has a snubber impedance connection line 5, which is formed as a winding with a loop through which the magnetic core 3 of the common mode choke 2 extends.
• the Bescensimpedanzaria 4 is formed as a parallel resonant ⁇ circular and comprises a coil, in other words an inductance which is parallel with a capacitor maral- tet. Furthermore, the wiring impedance unit 4 has ohmic resistances for attenuating the currents in the limiting impedance unit 4.
• the parallel resonant circuit of the limiting impedance unit 4 has a Gauss or Lorenz shaped impedance spectrum.
• the impedance of the limiting impedance unit has a maximum at the Reso ⁇ nanzfrequenz the parallel resonant circuit. Beyond the resonance frequency, the impedance drops symmetrically and steeply, so that a frequency range with a high impedance is provided.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Filters And Equalizers (AREA)

Applications Claiming Priority (2)

Publications (1)

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Country Status (5)

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• 2010
  • 2010-09-02 DE DE102010044621A patent/DE102010044621A1/de not_active Ceased
• 2011
  • 2011-08-19 RU RU2013114449/07A patent/RU2013114449A/ru not_active Application Discontinuation
  • 2011-08-19 EP EP11749795.8A patent/EP2612426A1/de not_active Withdrawn
  • 2011-08-19 WO PCT/EP2011/064269 patent/WO2012028475A1/de active Application Filing
  • 2011-08-19 US US13/820,556 patent/US20130201734A1/en not_active Abandoned

Non-Patent Citations (1)

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