EP3753094A1 - Kompensationsfilter und verfahren zur inbetriebnahme eines kompensationsfilters - Google Patents
Kompensationsfilter und verfahren zur inbetriebnahme eines kompensationsfiltersInfo
- Publication number
- EP3753094A1 EP3753094A1 EP19701165.3A EP19701165A EP3753094A1 EP 3753094 A1 EP3753094 A1 EP 3753094A1 EP 19701165 A EP19701165 A EP 19701165A EP 3753094 A1 EP3753094 A1 EP 3753094A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- compensation filter
- power line
- operational amplifier
- coupled
- filter according
- 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
Links
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
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/04—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of DC component by short circuits in AC networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/005—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
-
- 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
- H02M1/14—Arrangements for reducing ripples from DC input or output
- H02M1/15—Arrangements for reducing ripples from DC input or output using active elements
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/04—Frequency selective two-port networks
- H03H11/12—Frequency selective two-port networks using amplifiers with feedback
- H03H11/126—Frequency selective two-port networks using amplifiers with feedback using a single operational amplifier
-
- 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
- H02M1/123—Suppression of common mode voltage or current
-
- 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
- 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
- H02M1/14—Arrangements for reducing ripples from DC input or output
- H02M1/143—Arrangements for reducing ripples from DC input or output using compensating arrangements
-
- 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
Definitions
- the invention relates to compensation filters, z. For example, to suppress interference signals such as leakage currents, and methods for commissioning a corresponding compensation filter.
- Electric currents that flow in power lines to supply electrical consumers can be divided into three categories in principle.
- currents can flow, the usual use, eg. B. for driving a motor or the like, serve.
- currents can flow that are attributable to a malfunction.
- a housing of a consumer is connected to a live line.
- a corresponding current would flow through the user.
- RCD fault current circuit breaker
- the fault current circuit breaker would detect a current flow through a corresponding unwanted path and the electrical load from the
- a third category of currents relates to leakage currents of electrical consumers.
- Leakage current is an electrical current that flows under normal operating conditions into an undesirable current path and differs from unwanted currents of the second category in that the leakage current may be necessary for a correct functioning of the electrical consumer, such as Eg an EMC filter or a frequency converter,
- leakage currents are essentially harmless to users, but can be used in systems with fault current circuit breakers, eg. B. residual current circuit breakers, too
- isolation transformers Furthermore, it is possible to prevent inadvertent release of residual current operated circuit breakers by leakage currents through the use of isolation transformers.
- a galvanic isolation means that the leakage current flows almost completely on the secondary side of the isolating transformer and thus is not detected by the residual current circuit breaker, which is located on the primary side.
- the use of isolation transformers is undesirable due to some disadvantages. The size increases significantly at higher rated currents, making the isolation transformer large and difficult to build. This can be an exclusion criterion, especially for mobile electrical consumers. High power losses and associated high temperatures are another unwanted consequence of isolating transformers.
- a condensation filter for this purpose comprises a first port, a second port and a power line between the first port and the second port.
- the compensation filter has an operational amplifier with an input and an output.
- the compensation filter has a capacitive element which is coupled between the first port and the output of the operational amplifier and has the capacitance Co.
- the compensation filter further includes a first resistive element coupled between the capacitive element and the output of the operational amplifier and having the electrical resistance Ro.
- the filter further has a current transformer which is coupled in parallel to the capacitive element and which couples the power line to the input of the operational amplifier.
- a second resistive element of the compensation filter is coupled between the capacitive element and the input of the operational amplifier and has the resistance R B.
- Common-mode interference in the power line transmits a compensation signal of the same frequency, amplitude and inverse parity to the power line.
- the compensation filter is electrically interconnected between a power source and at least one electrically active element of an electrical load.
- a residual current circuit breaker between the power source and the
- Compensation filter is interconnected. Disturbances z. B. unavoidable for the operation of the electrical load, but if necessary can trigger a residual current circuit breaker are provided by providing a current path with a corresponding compensation signal of the
- the electrical load can via an electrical cal coupling, z. B. an electrical plug in an electrical outlet, connected to the power source and separated from the power source.
- the critical frequency range in which the compensation filter sufficiently attenuates the common mode noise includes frequencies between one kilohertz and 300 kilohertz. Furthermore, it is possible that the critical frequency range also covers frequencies below one kilohertz. It is accordingly possible that the critical frequency range begins at about 150 hertz.
- Conventional electrical consumers can be connected to a power source that provides a mains current with 50 or 60 Hertz frequency. In order to ensure the protection of users of the electrical load, a Gleich aktstrom the mains voltage, z. 50 hertz or 60 hertz, can not be damped. Fault currents with the mains frequency, z. B. 50 hertz or 60 hertz, the corresponding residual current circuit breaker must be able to reliably detect. This
- the critical frequency range begins above 50 hertz or above 60 hertz.
- Frequency range is determined by the values of the capacitance Co, the first resistive element Ro and the second resistive element R B. Accordingly, Co, Ro and R B SO are selected so that the lower limit is obtained at a frequency of 50 Hertz or higher, preferably 100 Hertz or 150 Hertz.
- the compensation filter reacts to common-mode noise.
- the number of electrical conductors in the power line can be greater than 1 and z. B. 3 include. It is thus possible to use electrical consumers having one phase working with two phases or those with three phases.
- the compensation filter may be coupled to the power source.
- the first port looks like the network impedance.
- the second port may be coupled to the electrical load and sees its impedance or the impedance of an intermediate drive system.
- the inverter system may be one of several sources of common mode noise. decision If the interference signal is a leakage current I N , SO is preferential, a compensation current Io generated in phase opposition and delivered to the power line that the resulting current I the expected current, z. B. the residual current circuit breaker corresponds.
- the capacitive element with the capacity Co represents the network connection that connects the network with the electronics of the Kom pensationsfilters.
- the core of the electronics is formed by the operational amplifier.
- the operation amplifier is part of a voltage follower. If the leakage current I N flows through a primary side of the current transformer, the water stream is transferred to the secondary side of the current transformer with a phase shift of 180 °. In this case, the current flows through the second resistive element, which can represent a Burden resistor, for example, and thus generates the input voltage of the operational amplifier.
- the amplification factor of the operational amplifier may, for example, be one. Then, the input voltage is transmitted 1: 1 to the first resistive element having the resistance Ro.
- the values of the electrical components are correspondingly chosen so that a frequency response is obtained, so that the damping is sufficiently high even at frequencies below one kilohertz to prevent tripping of a residual current circuit breaker.
- the frequency response is maintained at frequencies in the range of 50 hertz and 60 hertz so that attenuation does not occur. It is possible that at frequencies in the vicinity of the Netzfre frequency even overshoot is obtained by the compensation filter. Ie. a corresponding signal is not only not attenuated, but even amplified. However, such an over swing is not a problem and in particular does not constitute a safety-related problem. The personal safety of the user is given.
- the mains frequency can be 50 hertz or 60 hertz. It is accordingly possible that the common mode noise includes a leakage current or consists of a leakage current.
- the operational amplifier also takes into account this voltage drop in the regulation of the output voltage.
- the higher the amount of this voltage drop across the coupling capacitor the higher the amount of the coupling current Vo belonging to the coupling current. This means that the operational amplifier can be overdriven if the voltage drop across the head capacitor becomes too high. This suggests choosing the impedance of the coupling capacitor as small as possible.
- the compensation filter preferably has a large coupling capacity Co. This allows the lower frequency limit of the critical range to be shifted towards lower frequencies.
- the compensation filter includes a supply terminal that is disconnected from the power line.
- the compensation filter uses electronic components to generate the compensation current.
- the electronic components eg. As the operational amplifier, are electrical components, which are even electrical consumers cher.
- the compensation filter has the power line, which can be connected to a power source. It would therefore be reasonable to make the energy supply to the electronics of the compensation filter by an interconnection with the power line.
- the compensation filter Ver supply connection in particular for the supply of electronic's components, which is separated from the power line ge.
- circuit components of the compensation filter are from an external
- the compensation filter is preferably supplied with electrical shear energy before the compensation filter between a power source and the electrical load is switched GE.
- the electronics of the compensation filter is put into operation earlier and transient phenomena of the electronic components can be terminated before the compensation filter has to start its work.
- the aspect of the prematurity of the power supply of the electronic components is particularly important for the compensation of leakage currents with low frequency, eg. Eg less than one kilohertz. This ensures that the electronics attenuate the leakage currents fast enough before the residual current device can detect these currents.
- a switching power supply that supplies the Opera tion amplifier with electrical energy, a kriti shear point, since the settling of the output voltage z. B. can take longer than 100 milliseconds.
- the external power supply can ensure who the that the output voltage of the switching power supply for the electronics is reached before the leakage currents flow.
- the switching power supply for the electronics for example, the energy can reduce the external voltage of 400 volts to an operating voltage of the electronics of about 60 volts.
- the DC Operating point of an operational amplifier can, for. B. 30 volts.
- the electronics of the compensation filter is in steady state flow before leakage currents flow.
- the current transformer comprises magnetically coupled inductive elements.
- a first inductive element can be connected in a conductor of the power line or be coupled to a part of a conductor of the power line.
- a second part of the current transformer can be connected to the first part of the current transformer and turn turn ver with the electronics of the compensation filter or coupled.
- the current transformer comprises at least one indukti ves element per conductor of the power line on the primary side.
- the power line comprises conductors for one, two or three phases in the power line.
- the power line comprises conductors for three phases, the conductors are coupled to the operational amplifier via a neutral point and the neutral point is coupled to the respective conductor for each phase via a parallel connection of a capacitive element and a resistive element.
- a method for starting up a compensation filter with its own supply connection can be configured in such a way that the supply connection to a power source is interconnected before the compensation filter is interconnected between a consumer and a power source.
- the energy source which connects the compensation filter with the consumer, can be identical to the energy source for the supply connection. However, it is also possible that the supply connection of the compensation filter and the consumers use different sources of energy.
- Fig. 1 an equivalent circuit diagram, which explains the operation of Kom pensationsfilters.
- Fig. 2 a preferred frequency response of Kompensationsfil age.
- Fig. 3 the coupling to a three-phase line.
- FIG 5 shows an embodiment of the compensation filter with an external supply connection.
- FIG. 1 shows an equivalent circuit diagram of a possible circuit topology of the compensation filter KF.
- the compensation filter KF has a first port PI and a second port P2.
- a power line SL is connected between the first port PI and the second port P2.
- the compensation filter has an operational amplifier OPV.
- the Operationsver stronger has an input E and an output A.
- the coupling capacitance that is, the capacitive element connected to the capacitance Co.
- the first resistive element Ro is interconnected.
- a current transformer SW Parallel to the coupling capacitance Co, a current transformer SW is connected.
- the current transformer SW has a first inductive element SW1 and a second induct tive element SW2.
- the first inductive element SW1 is arranged on the primary side of the current transformer SW and connected in the power line SL or at least coupled to the power line SL.
- the second inductive element SW2 of the current transformer SW is arranged on the secondary side of the current transformer SW and coupled to the input E of the operational amplifier.
- the second inductive element SW2 of the current transformer SW is pa rallel connected to the second resistive element RB.
- the second resistive element RE is connected in series between the coupling capacitance Co and the input E of the operational amplifier OPV.
- I N represents the complete fault, z.
- Io is the compensation current which is determined by the operational amplifier OPV and the additional circuit elements Co, RE and Ro.
- the compensation current Io is preferably before the sign, the frequency and the
- the compensation filter can be interconnected with an electrical consumer via the second port P2.
- FIG. 2 shows a preferred frequency response FG of the compensation filter.
- the critical frequency range is, for example, defined so that attenuation values of 10 dB define the lower and upper limits of the frequency range.
- FIG. 2 shows a critical frequency range from 150 hertz to 30 kilohertz.
- the overshoot at frequencies just below 100 hertz effectively represents signal amplification.
- this is not a problem and does not represent a functional safety problem.
- FIG. 3 illustrates how a connection to a three-phase power line is possible.
- the symmetry point of the three phases is obtained at the star point SP.
- the neutral point SP is connected by a respective parallel connection of a capacitive element CE and a resistive element RB to the respective conductor LI, L2, L3 of the power line SL.
- the star point SP is the output side via a parallel connection, comprising the coupling inductance C0 and the second resistive element RB to the rest of the compensation circuit (not shown here) interconnected.
- the fault to be compensated is a common-mode fault. Ie. a disturbance that is additive to all conductors LI, L2, L3 of the power line SL with respect to amplitude, frequency and phase acts. It is therefore sufficient to let the electronics of Kompensa tion filter act on the neutral point SP of the power line SL.
- FIG. 4 shows an equivalent circuit diagram which helps to advantageously determine the value of the coupling capacitance Co.
- the Netzanbin tion is realized by the one or more coupling capacitors. If a leakage current is compensated and thus flows through the coupling capacitor or several coupling capacitors, a voltage drop occurs at the capacitors. So that the compensation current Io always remains correct, the operational amplifier must also take into account the associated voltage drop at the coupling capacitor in the regulation of the output voltage. In order to be able to compensate for leakage currents of a frequency below one kilohertz, coupler capacitors with a larger capacitance than conventionally be known are necessary in order to obtain a lower impedance and thus a smaller voltage drop.
- Circuit components ELC, z. B. the operational amplifier OPV to supply via an external supply connection VA with electrical shear energy. It is just not taken elec- tric energy of the power line. This makes it possible to supply the electronic circuit components ELC with electrical energy and to wait for transient processes before the compensation filter KF starts its work, ie. H. before the compensation filter a
- the associated time sequence is shown in FIG.
- the upper curve VSUP represents the time profile of the versor supply voltage of the electrical circuit components ELC of the compensation filter KF.
- the curve VOPV shows the output signal of the operational amplifier.
- the electronic circuit components are powered. It takes a certain time DT until the supply voltage has reached the correct value.
- the operation amplifier takes on its character as soon as a supply voltage is made available to it. However, it reaches its maximum effectiveness only at the time To plus DT, at which the supply voltage VSUP has reached its intended value.
- Residual current circuit breaker can be the result.
- the compensation filter receives its own voltage supply at the supply connection VA, preferably before a functioning of the filter is required, transient processes can take place.
- the compensation filter can be interconnected with the first and second ports between a power source and a consumer.
- the time delay DT can be on the order of 100 milliseconds.
- the compensation filter and the method for commissioning a compensation filter are not shown in the figure and described technical details.
- the compen sationsfilter can further circuit components such. B. include further coupling capacitors and other electronic scarf processing components.
- the method may include additional steps, e.g. B. with respect to the interconnection to the external
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Breakers (AREA)
- Power Conversion In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018103438.5A DE102018103438A1 (de) | 2018-02-15 | 2018-02-15 | Kompensationsfilter und Verfahren zur Inbetriebnahme eines Kompensationsfilters |
| PCT/EP2019/050796 WO2019158289A1 (de) | 2018-02-15 | 2019-01-14 | Kompensationsfilter und verfahren zur inbetriebnahme eines kompensationsfilters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3753094A1 true EP3753094A1 (de) | 2020-12-23 |
Family
ID=65138965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19701165.3A Pending EP3753094A1 (de) | 2018-02-15 | 2019-01-14 | Kompensationsfilter und verfahren zur inbetriebnahme eines kompensationsfilters |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11245325B2 (de) |
| EP (1) | EP3753094A1 (de) |
| CN (1) | CN111937284B (de) |
| DE (1) | DE102018103438A1 (de) |
| WO (1) | WO2019158289A1 (de) |
Family Cites Families (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2854196A1 (de) | 1978-12-15 | 1980-06-26 | Bosch Gmbh Robert | Schaltungsanordnung zur einschaltverzoegerung bei einer verstaerkerschaltung |
| DD154465A3 (de) | 1980-10-09 | 1982-03-24 | Gerhard Fiedler | Elektronischer schwellwertschalter mit einschaltverzoegerung |
| US4591963A (en) * | 1984-04-23 | 1986-05-27 | At&T Bell Laboratories | Technique for reducing line current harmonics at input to power supply acting as nonlinear load |
| JP2863833B2 (ja) | 1996-09-18 | 1999-03-03 | 岡山大学長 | アクティブコモンモードキャンセラ |
| US7154254B2 (en) * | 2004-06-18 | 2006-12-26 | Agilent Technologies, Inc. | Apparatus and method for improving electromagnetic compatibility |
| DE102007021978B4 (de) * | 2007-05-10 | 2009-04-16 | Compact Dynamics Gmbh | Aktives Kompensationsfilter |
| WO2009046762A1 (en) * | 2007-10-10 | 2009-04-16 | Schaffner Emv Ag | Emc filter |
| DE102008024348B4 (de) * | 2008-05-20 | 2010-10-07 | Karlsruher Institut für Technologie | Verfahren zur Reduktion pulsförmiger Erdströme an einem elektrischen Großgerät und Kompensationsschaltung zur Erdstromverlagerung |
| JP5263663B2 (ja) | 2008-08-28 | 2013-08-14 | 富士電機株式会社 | 伝導性ノイズフィルタ |
| CN101527505B (zh) * | 2009-03-31 | 2012-05-23 | 西安交通大学 | 一种干扰电压衰减装置 |
| WO2011125944A1 (ja) * | 2010-04-05 | 2011-10-13 | 三菱電機株式会社 | 漏れ電流低減装置 |
| DE102011078304A1 (de) | 2011-06-29 | 2013-01-03 | Siemens Aktiengesellschaft | Reduktion von Ableitströmen in einem Frequenzumrichter |
| WO2014048471A1 (en) * | 2012-09-26 | 2014-04-03 | Schaffner Emv Ag | Power line filter device |
| US9407133B1 (en) * | 2013-02-15 | 2016-08-02 | Ideal Power, Inc. | Active power conditioner |
| US9564820B2 (en) * | 2013-03-15 | 2017-02-07 | Linear Technology Corporation | Methods and systems for control of DC-DC converters |
| US9048817B2 (en) * | 2013-03-29 | 2015-06-02 | Hamilton Sundstrand Corporation | Voltage fed feed forward active EMI filter |
| CN103354419B (zh) * | 2013-05-30 | 2016-03-30 | 西安交通大学 | 基于恒定跨导放大器和电容乘法器的片上全集成补偿网络 |
| EP2945268B1 (de) * | 2014-05-12 | 2019-12-18 | TDK Electronics AG | Aktivfiltervorrichtung und Schaltungsanordnung mit einer Aktivfiltervorrichtung |
| DE102014221042A1 (de) | 2014-07-04 | 2016-01-07 | Siemens Aktiengesellschaft | Fehlerstromschutzvorrichtung zur Ableitstromerfassung |
| CN104202013B (zh) * | 2014-08-21 | 2017-03-08 | 华为技术有限公司 | 一种有源emi滤波器和电源管理装置 |
| CN104868466B (zh) * | 2015-04-27 | 2017-11-28 | 华为技术有限公司 | 一种滤波装置和电源供电系统 |
| CN204498074U (zh) * | 2015-05-18 | 2015-07-22 | 江西仪能新能源微电网协同创新有限公司 | 一种直流耦合差分放大装置 |
| EP3113361B1 (de) | 2015-07-03 | 2019-08-28 | TDK Electronics AG | Elektronische vorrichtungen und verfahren zur filterung von gleichtaktstörungen in leistungselektronikvorrichtungen |
| US9455668B1 (en) * | 2015-11-20 | 2016-09-27 | Stmicroelectronics S.R.L. | Capacitance to voltage converter with a leakage compensation loop |
| ITUB20160957A1 (it) | 2016-02-22 | 2017-08-22 | Teypra S R L | Dispositivo di compensazione per un circuito di un impianto elettrico monofase |
| CN105703366A (zh) * | 2016-04-25 | 2016-06-22 | 中国舰船研究设计中心 | 同时抑制差共模谐波干扰的有源滤波方法及装置 |
| KR102485699B1 (ko) * | 2016-04-28 | 2023-01-05 | 엘에스일렉트릭(주) | 컨버터 시스템의 댐핑 장치 및 방법 |
| CN106385038A (zh) * | 2016-11-20 | 2017-02-08 | 广西大学 | 一种电子信息设备补偿系统 |
-
2018
- 2018-02-15 DE DE102018103438.5A patent/DE102018103438A1/de active Pending
-
2019
- 2019-01-14 CN CN201980026090.2A patent/CN111937284B/zh active Active
- 2019-01-14 US US16/970,285 patent/US11245325B2/en active Active
- 2019-01-14 EP EP19701165.3A patent/EP3753094A1/de active Pending
- 2019-01-14 WO PCT/EP2019/050796 patent/WO2019158289A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018103438A1 (de) | 2019-08-22 |
| US20210075310A1 (en) | 2021-03-11 |
| WO2019158289A1 (de) | 2019-08-22 |
| US11245325B2 (en) | 2022-02-08 |
| CN111937284B (zh) | 2024-07-02 |
| CN111937284A (zh) | 2020-11-13 |
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