EP2893625A1 - Flusskompensation für fluss-nachbildungen für mehrphasige gleichspannungswandler - Google Patents
Flusskompensation für fluss-nachbildungen für mehrphasige gleichspannungswandlerInfo
- Publication number
- EP2893625A1 EP2893625A1 EP13766236.7A EP13766236A EP2893625A1 EP 2893625 A1 EP2893625 A1 EP 2893625A1 EP 13766236 A EP13766236 A EP 13766236A EP 2893625 A1 EP2893625 A1 EP 2893625A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- converter
- signal
- voltage
- inductance
- circuit arrangement
- 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.)
- Withdrawn
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
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
-
- 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
- H02M1/0064—Magnetic structures combining different functions, e.g. storage, filtering or transformation
-
- 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
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
- H02M3/1586—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved
Definitions
- the invention relates to a circuit arrangement for at least partially replicating a magnetic flux through at least two inductors of a polyphase DC-DC converter, wherein the at least two inductors are magnetically coupled, with a first input and / or output for connection to a first network and with a second input. and / or output for connection to a second network. Furthermore, the invention relates to a multiphase DC-DC converter for transporting electrical energy from a first network to a second network with such a circuit arrangement.
- DC-DC converters in particular in bidirectional DC-DC converters, z. B. learn in bidirectional up-down wall, it is basically known to build the DC-DC converter multiphase.
- a multi-phase design of a DC-DC converter can be reduced by superposition of the ripple currents of the individual phases of the sum ripple current.
- Multiphase DC-DC converters with coupled inductance thus, it is not possible to operate them stably in the current mode.
- Even the known so-called voltage mode, in which the output voltage at the inductance serves as the basis for the control of a DC-DC converter can not be used for a general control of a multi-phase DC-DC converter with coupled inductances.
- the voltage mode, in which the output voltage of the DC-DC converter is used for control slower than the current mode. Therefore, the voltage mode is not suitable for all applications, in particular, it is only very limited use, for example, for the automotive sector.
- the object of the invention is thus to at least partially overcome the above-described disadvantages of known multiphase DC-DC converters with coupled inductors.
- a circuit arrangement for at least partially simulating a magnetic flux through at least two inductors of a polyphase DC-DC converter according to the independent claim 1 and by a polyphase DC-DC converter for transporting electrical energy from a first network to a second network according to claim 8.
- the object is achieved by a circuit arrangement for at least partially simulating a magnetic flux through at least two inductors of a polyphase DC-DC converter, wherein the at least two inductors are magnetically coupled, with a first input and / or output for connection to a first Network and with a second input and / or output for connection to a second network, wherein the first network has a first voltage and the second network has a second voltage, the circuit arrangement having at least two circuits solved.
- the circuits in each case include
- first means for generating a first signal simulating a DC component of the magnetic flux through an inductance the first means each comprising first elements for generating the first signal
- Second means for generating a second signal at least partially replicate the alternating component of the magnetic flux through an inductance
- each circuit each have at least one compensation element for compensating a magnetic saturation of the respective inductance.
- the flux through each one can be detected from other electrical quantities which can be detected with simple means by means of the circuits of the circuit arrangement according to the invention Inductance modeled. In this case, this simulation of the flux through each inductance is significantly less expensive and thus less expensive than the direct measurement of the magnetic flux in each inductance. This replica is also of such good quality in many cases that accurate measurement of the flow can be avoided.
- Each of the circuits enables at least partial emulation of the magnetic flux through a single one of the inductors.
- the compensation element in the second means of each of the circuits makes it possible, in particular, to operate the polyphase DC-DC converter at high pulse-pause ratios and / or close to the magnetic saturation of the inductances of the individual phases.
- the compensation elements can, for example, change the second signal such that detection of the ideal control times for the alternating triggering of the individual phases of the polyphase DC-DC converter is made easier and thus more accurate.
- This can be achieved, for example, by increasing the slope of the second signal, ie the change in the second signal over time, at high pulse-pause ratios and / or near the magnetic saturation of the inductors.
- the timing of the individual phases can be determined much more accurately.
- An operation of a multi-phase DC-DC converter, which is equipped with a circuit device according to the invention is characterized significantly safer and more stable.
- each of the at least two inductors is assigned one of the at least two circuits of the circuit arrangement. This makes it possible to control each of the inductors individually, wherein for each of the inductors, separately through one of the circuits of the circuit arrangement, the magnetic field flowing through the inductance is separated. table flow is replicated at least in sections.
- the respective second means comprise elements, wherein the elements are designed for integrating a voltage applied to the respective inductance.
- the second signal which indicates the alternating component of the magnetic flux through the respective inductance, can be obtained by integrating a signal which simulates the voltage across the inductance. This is due in particular to the fact that the voltage across an inductance corresponds to the derivative of the current through this inductance.
- the second means thus advantageously have elements for integrating a voltage applied to the respective inductance.
- These elements for integrating can have, for example, a current source which can be controlled by the voltage applied to the respective inductance and, in series with the controllable current source, a parallel circuit comprising a controllable switching element and a capacitor.
- This controllable switching element can be controlled by a control means so that it is open with increasing flux through the respective inductance, so that the capacitor is charged, and that it is closed with falling flux through the respective inductance to discharge the capacitor. In this way, it is possible to replicate the increasing part of the flux in the respective inductance, which is important for the control of the DC-DC converter, by the second signal, which is the result of the integration.
- the compensation element can be a feedback of the element designed for integration.
- the output signal of the integrating element in particular the second signal
- progressive, circuit leads to an at least approximately square increase of the second signal.
- at high pulse-pause ratios and / or close to the magnetic saturation of the respective inductances of the individual phases of the polyphase DC-DC converter which without compensation a slow, approximately linear increase of the second signal is present, thereby a significant increase in the slope of the second signal be achieved.
- the recognition of the ideal switching times for the alternating driving of the individual phases of the multiphase Gleichspanungs- converter is even easier and thus more accurate.
- each inductance is conductively connected to one of the two networks in such a way that maximum switching elements are present in the line.
- the respective inductances can be connected to the first network without limiting the generality. In this way, the voltage applied to the respective inductances voltage can be generated very easily, since the voltage does not have to be measured, but from the mains voltages that represent easily detectable electrical variables, can be detected.
- the respective first elements of the first means each comprise a measuring resistor, the respective measuring resistor being connected on the one hand to the respective inductor and each to a first capacitor and on the other hand to the first input and / or output.
- the measuring resistor is used to simulate only the DC component of the magnetic flux through an inductance and the measured current into the first, to form the DC component of the flow corresponding signal.
- a detection of the alternating component of the flux through the inductance by means of the measuring resistor is not necessary or not possible. The problems usually resulting in such a measurement of the alternating component can thus be avoided.
- the measuring resistor is preferably arranged at a location at which preferably only a direct current flows. This can be, for example, the current through the first input and / or output.
- the first elements for generating the first signal are proposed, which detect an average value of the flux through the inductance, ie the DC component. From the detected current, the first signal is generated, which corresponds to the DC component of the flow through the respective inductance.
- These first elements are part of the first means for generating the first signal.
- such first means may be two antiparallel switched transconductance amplifiers.
- the first signal can be further improved, in particular smoothed.
- the third means are designed to generate a third signal corresponding to the sum of the respective first and the respective second signal.
- the respective first and second signals of the first and second means of the respective inductance associated circuit form at least partially the DC component and the AC component of the magnetic flux in the respective inductance after.
- An addition of the two signals by the third means thus results in an at least partial emulation of the entire flow through the respective inductance.
- This total signal can then be used to drive the DC-DC converter, in particular each individual inductance of the multiphase DC-DC converter
- the object is achieved by a multiphase DC-DC converter for transporting electrical energy from a first network to a second network, wherein the first network has a first voltage and the second network has a second voltage, comprising at least two inductors, wherein the inductors are magnetically coupled and can be driven alternately resolved.
- the multiphase DC-DC converter according to the invention is characterized in that the DC-DC converter comprises a circuit arrangement for at least partially replicating a magnetic flux through the at least two inductors of a polyphase DC-DC converter according to the first aspect of the invention.
- Fig. 2 shows a circuit arrangement for generating a voltage signal
- Flux simulating voltage signal and a current of a three-phase DC-DC converter with coupled inductances Flux simulating voltage signal and a current of a three-phase DC-DC converter with coupled inductances.
- FIG. 1 shows a possible embodiment of a phase 100 of a multiphase DC-DC converter.
- the remaining phases of the multiphase DC voltage converter are constructed analogously, in particular the inductors L1, L2 ..., Ln of the individual phases of the polyphase DC-DC converter are magnetically coupled.
- a circuit 120 of a circuit arrangement 110 associated with this phase 100 of the polyphase DC-DC converter is shown.
- the power section of a phase 100 of a polyphase DC-DC converter in particular a bidirectional up-down DC-DC converter, is shown.
- a voltage of a first network is converted into the voltage of a second network or conversely, the voltage of the second network is converted into the voltage of the first network.
- the energy flow can be controlled by a corresponding control of controllable switching elements W1, W2 of this phase 100 of the DC-DC converter.
- controllable switching elements W1, W2 includes this phase 100 of the DC-DC converter in a known arrangement parallel to the switching elements W1, W2 arranged diodes D1, D2, a first capacitor C1, an inductor L1 and a second capacitor C2.
- At a first input and output N1 can be applied to ground voltage, as well as at a second input and output N2.
- the first input and output N1 is connected via a measuring resistor R to both the inductance L1 and the first capacitor C1.
- the control of the controllable switching elements W1, W2 is carried out by a control means S.
- the phase 100 of a polyphase DC-DC converter comprises in addition to the power part, a circuit 20 of a circuit arrangement 1 0, with which the flux can be simulated at least in sections by the inductance L1 of this phase 100 of the DC-DC converter ,
- This circuit 120 comprises first means 1 for partially reproducing a direct component of the magnetic flux through the inductance L1.
- the circuit 120 comprises second means 2 for at least partially replicating an alternating component of the magnetic flux through the inductance L1 and third means 3 for combining the two replicas and for generating a signal U3 that at least partially the entire magnetic flux in the Inductance L1 simulates.
- the first means 1 comprise first elements 11 for generating the first signal U1, which corresponds to the DC component of the magnetic flux through the inductance L1.
- the first elements 11 comprise two antiparallel-connected transconductance amplifiers OTA1a, OTA1b, whose inputs are supplied with the voltage dropped across the measuring resistor R.
- a current is generated by one or the other transconductance amplifier OTA1a, OTA1b, which is smoothed by a parallel connection of a capacitor C3 and a resistor R3 and converted into a voltage.
- the voltage drop across this parallel circuit voltage is provided as the first signal U1 and corresponds to the DC component of the magnetic flux of the inductor L1.
- the voltage U (L1) applied to the inductor L1 is integrated with elements 21 for integration to produce a second signal U2.
- the voltage U (L1) applied to the inductance L1 controls a controllable current source G1 whose current is conducted via a parallel circuit of a capacitor C and a further controllable switching element SW_C.
- the capacitor C is charged either with open controllable switching element SW_C, or discharged via the closed controllable switching element SW_C.
- the opening and closing of the switching element SW_C occurs synchronously with the switching of the switching elements W1 and W2 of the phase 100 of the multiphase DC-DC converter.
- the voltage across the capacitor C forms the second signal U2, which simulates the rising part of the alternating component of the magnetic flux through the inductance L1.
- the second means 2 has a compensation element 22 for compensating a magnetic saturation of the respective inductance L1.
- the compensation element 22 in particular comprises a second controllable current source G2, to which the second signal U2 is supplied as a control signal. This results in a feedback for the second signal U2.
- so-called progressive, circuit results in an approximately square course of the second signal U2.
- the second signal U2 increases significantly enough to more easily and thus more accurately recognize the ideal control times for the alternating driving of the individual phases 100 of the multiphase Gleichspanungswandlers. This ensures an even more stable and safer operation of a polyphase DC-DC converter with a circuit device 110 according to the invention.
- the first signal U1 and the second signal U2 are combined by means of a means 3 for joining to the signal U3 simulating the flux through the inductance L1.
- the two signals IM and U2 are combined by an adder 31 of the third means 3 to this third signal U3.
- the control means S preferably has an input which indicates the direction of energy transfer through the DC-DC converter, that is, whether it is an up-down or down-converter.
- the control means S have an input, via which the control means S a pulse width modulated signal is supplied. This signal can be generated by a PWM modulator M from the signal U3 simulating the magnetic flux through the inductance L1 and a regulator signal.
- the switching signals TG or BG for the controllable switching elements W1, W2 in the power part of the phase 100 and the control signal for the controllable switching element SW_C in the second means 2 are thus generated based on the magnetic flux through the inductance L1 reproducing signal U3 , This enables a safe and stable control of the phase 100 of the multiphase DC-DC converter. Since each of the phases 100 of the multi-phase DC-DC converter is provided with such a circuit 120 of the circuit arrangement 110, stable and safe operation of such a DC-DC converter can be ensured.
- a circuit is shown, with which a voltage U (L1 ... Ln) can be generated, which corresponds to the voltage across the inductors L1, .... Ln of the polyphase DC-DC converter. It is used that in an upward operation of the polyphase DC-DC converter, the voltage applied to the inductors L1 Ln voltage of the mains voltage of the first network and in the downward operation of multiphase DC-DC converter corresponds to the difference of the mains voltages of the first and the second network.
- the circuit for generating the voltage U (L1 ... l_n) to the inductors L1 Ln therefore contain a controllable switching element Boost, which is closed when the polyphase DC-DC converter is operated in the up mode.
- the first input and output N1 of the polyphase DC-DC converter is connected directly to the output of the circuit, whereby the voltage U (L1 ... Ln) corresponds to the mains voltage of the first network.
- the controllable switching element Buck may be closed, thereby connecting the output of the circuit to the output of a subtracter SUB.
- the inputs of this subtractor SUB are connected to the two inputs and outputs N1, N2 of the polyphase DC-DC converter such that a difference of the second and the first voltage is applied to the output of the subtractor SUB.
- the presented circuit represents a particularly simple way of forming the voltage U (L1... Ln) applied to the inductors L1, Ln, since no direct measurements of the voltage at the respective inductances L1 Ln are necessary.
- Fig. 3 shows measurements made on a three-phase DC-DC converter.
- the measurements of the individual phases 100 of the multiphase DC-DC converter with different line types (solid, dashed, dot-dashed) are indicated.
- the magneti ⁇ specific flux density of each inductance L1, L2, L3, the magnetic flux density at least partially simulating signal U3 and the current intensity flowing in each inductance L1, L2, L3 are shown from top to bottom.
- the magnetic flux density and the current intensity it is clearly visible that there is no proportionality between the magnetic flux density and the current intensity in the individual phases 100. This is in contrast to a single-phase DC-DC converter in which this is the case.
- the middle panel shows the signal U3 generated by a circuit 120 of a circuit arrangement 110 according to the invention shown in FIGS. 1 and 2. It forms for each of the individual phases 100 the rising part of the magnetic flux density, and thus of the magnetic flux, in the respective inductance L1, L2, L3 at least partially. It can clearly be seen that at the beginning of each increase, the third signal U3 has a very small slope, ie only rises very slowly.
- this may be caused, for example, by a high pulse-pause ratio and / or an operation close to the magnetic saturation of the inductors L1, L2, L3.
- a significantly greater increase of the respective second signal U2 and thus as a result of the third signal U3 shown here is generated.
- the respective ideal control time for each phase 100 of a multiphase DC-DC converter can thus be determined with certainty.
- This signal U3 can thus be used to safely and stably control the polyphase DC-DC converter.
- Diodes of a phase of a polyphase DC-DC converter Controllable switching elements of a phase of a multiphase DC-DC converter
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012108149.2A DE102012108149A1 (de) | 2012-09-03 | 2012-09-03 | Flusskompensation für Fluss-Nachbildungen für mehrphasige Gleichspannungswandler |
| PCT/EP2013/068069 WO2014033293A1 (de) | 2012-09-03 | 2013-09-02 | Flusskompensation für fluss-nachbildungen für mehrphasige gleichspannungswandler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2893625A1 true EP2893625A1 (de) | 2015-07-15 |
Family
ID=50098241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13766236.7A Withdrawn EP2893625A1 (de) | 2012-09-03 | 2013-09-02 | Flusskompensation für fluss-nachbildungen für mehrphasige gleichspannungswandler |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2893625A1 (de) |
| DE (1) | DE102012108149A1 (de) |
| WO (1) | WO2014033293A1 (de) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1762177C3 (de) * | 1968-04-25 | 1975-09-04 | Telefunken Patentverwertungsgesellschaft Mbh, 7900 Ulm | Schaltungsanordnung zur Erzeugung einer Kondensatorladespannung mit positiv exponentiellem Anstieg |
| DE2053975C3 (de) * | 1970-10-28 | 1980-09-25 | Loewe Opta Gmbh, 1000 Berlin | Funktionsgenerator mit in Abwärts- und Aufwärtsrichtung zeitlichspiegelbildlichem, exponentiellem Spannungsverlauf in Hochfrequenzempfängern mit elektronischem Suchlauf |
| US7126318B2 (en) * | 2004-08-25 | 2006-10-24 | Matsushita Electric Industrial Co., Ltd. | Higher order slope compensation for fixed frequency current mode switching regulators |
| US7449867B2 (en) * | 2005-07-26 | 2008-11-11 | International Rectifier Corporation | Multi-phase buck converter with a plurality of coupled inductors |
| DE102007041176A1 (de) * | 2007-08-27 | 2009-03-05 | Siemens Ag | Mess- und/oder Schaltgerät |
| WO2011074154A1 (ja) * | 2009-12-14 | 2011-06-23 | 三菱電機株式会社 | Dc/dcコンバータ |
| DE102010061042A1 (de) * | 2010-12-06 | 2012-06-06 | Hella Kgaa Hueck & Co. | Gleichspannungswandler mit Schaltung zum Nachbilden eines Stroms durch eine Speicherdrossel |
-
2012
- 2012-09-03 DE DE102012108149.2A patent/DE102012108149A1/de not_active Withdrawn
-
2013
- 2013-09-02 WO PCT/EP2013/068069 patent/WO2014033293A1/de not_active Ceased
- 2013-09-02 EP EP13766236.7A patent/EP2893625A1/de not_active Withdrawn
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2014033293A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102012108149A1 (de) | 2014-03-06 |
| WO2014033293A1 (de) | 2014-03-06 |
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