WO2020049161A2 - Procédé et circuit amplificateur pour augmenter une inductance - Google Patents

Procédé et circuit amplificateur pour augmenter une inductance Download PDF

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Publication number
WO2020049161A2
WO2020049161A2 PCT/EP2019/073853 EP2019073853W WO2020049161A2 WO 2020049161 A2 WO2020049161 A2 WO 2020049161A2 EP 2019073853 W EP2019073853 W EP 2019073853W WO 2020049161 A2 WO2020049161 A2 WO 2020049161A2
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WO
WIPO (PCT)
Prior art keywords
supply line
interference signals
signals according
amplifier circuit
transformer
Prior art date
Application number
PCT/EP2019/073853
Other languages
German (de)
English (en)
Other versions
WO2020049161A3 (fr
Inventor
Hartwig Reindl
Bastian Arndt
Peter Olbrich
Original Assignee
Avl Software And Functions Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Avl Software And Functions Gmbh filed Critical Avl Software And Functions Gmbh
Priority to DE112019004466.4T priority Critical patent/DE112019004466A5/de
Publication of WO2020049161A2 publication Critical patent/WO2020049161A2/fr
Publication of WO2020049161A3 publication Critical patent/WO2020049161A3/fr

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor
    • H03F3/3066—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the collectors of complementary power transistors being connected to the 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor
    • H03F3/3083—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the power transistors being of the same type
    • H03F3/3086—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the power transistors being of the same type two power transistors being controlled by the input signal
    • H03F3/3089—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the power transistors being of the same type two power transistors being controlled by the input signal comprising field-effect transistors in the control circuit
    • 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
    • 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
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/30—Indexing scheme relating to single-ended push-pull [SEPP]; Phase-splitters therefor
    • H03F2203/30033—A series coupled resistor and capacitor are coupled in a feedback circuit of a SEPP amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/30—Indexing scheme relating to single-ended push-pull [SEPP]; Phase-splitters therefor
    • H03F2203/30078—A resistor being added in the pull stage of the SEPP amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/30—Indexing scheme relating to single-ended push-pull [SEPP]; Phase-splitters therefor
    • H03F2203/30111—A resistor being added in the push stage of the SEPP amplifier
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • the invention relates to a method for suppressing interference signals in voltage sources, in particular in high-voltage sources for vehicles, with the features of the preamble of claim 1.
  • Active filter concepts are also known, e.g. from WO 2003/005578 A1, which, however, mainly for applications in signal processing or for applications in which lower voltages and / or lower
  • Services predominate can be used.
  • the object of the invention is to provide an improved, inexpensive and
  • the solution according to the invention is a method for suppressing interference signals in at least one supply line, in particular in at least one supply line for
  • the at least one supply line has at least two inductive ones
  • the at least two inductive transmitters each have a primary circuit and a secondary circuit, the at least one primary circuit being assigned to the supply line, and the at least one secondary circuit being assigned to the amplifier circuit, with an inductance of the at least one primary circuit of a first transformer in the at least one a supply line for suppressing interference signals is formed, and wherein a signal is tapped from the supply line by means of a second transformer and an input of the
  • Amplifier circuit is fed. It is essential that the inductance of the at least one primary circuit of the first transformer is increased by the amplifier circuit feeding a correction signal into the first transformer and the amplifier circuit forming the correction signal by amplification from the signal of the second inductive transmission, in particular by
  • the primary coil of the first inductive transmitter electronically. It can be provided that an interference voltage current is converted into a voltage by the second inductive transformer. This voltage is amplified via a pre-stage of the amplifier circuit or influenced in the frequency response. The voltage signal amplified by the preamplifier undergoes current amplification in a power amplifier and is fed into the supply line as a correction voltage via the first inductive transformer. In particular, the correction signal is not used to cancel an interference signal by superimposition, but rather to increase the inductance of the primary coil virtually.
  • the inductance of the at least one primary circuit of the first transformer is preferably increased by the amplifier circuit feeding a correction signal into the first transformer and the amplifier circuit doing this
  • Correction signal depends on the interference signal by amplification from the signal of the second inductive transmission.
  • the amplifier circuit is designed in particular in such a way that at the input of the amplifier voltage the one tapped off from the supply line
  • inductance In contrast to a real increase in inductance, which for example can only be achieved by more coil windings or another core material, the inductance is increased purely electronically. This has the advantage that there are no additional ohmic losses in the supply line.
  • the problem of saturation of the core material of an inductive transmitter is also reduced in the method according to the invention. This advantage is essential to high performance, such as in traction drives in vehicles are necessary to be able to transmit without loss and without interference. Furthermore, costs and space can also be saved by the method according to the invention.
  • a component or a component is preferably used under an inductive transmitter
  • Component arrangement understood, which is used for signal transmission and in which the primary side is galvanically isolated from the secondary side.
  • an inductive transformer has at least two inductively coupled coils, usually as a primary coil and
  • secondary coil With an inductive transformer, several primary coils and / or several secondary coils can also be present. In particular, in the case of an inductive transmitter, all of its coils are inductively coupled to one another. The inductive coupling of the coils of an inductive transmitter can be done, for example, by a common one
  • Coil core done.
  • all coils of an inductive transformer with the common coil core are magnetic
  • the coupling can also, for example in the case of
  • Air coils due to the spatial arrangement of the coils to each other or the design or alignment of the coil windings.
  • the first inductive transmitter is formed separately from the second inductive transmitter, ie the two inductive transmitters are not magnetically coupled to one another.
  • the first inductive transmitter can be magnetically shielded from the second inductive transmitter and / or magnetically separated by a corresponding spatial arrangement.
  • it is provided to suppress common-mode disturbances and / or push-pull disturbances.
  • Supply line for forming the correction signal can be a
  • Push-pull interference signal or a common-mode interference signal can be used to obtain a push-pull interference signal or a common-mode interference signal.
  • the signal can be read from the supply line using an inductive transmitter and then corresponds to the interference signal.
  • push-pull disorders it is also possible to use a
  • the signal can be read from a transmitter with one primary circuit per supply line and then corresponds to the interference signal.
  • common mode interference it is also possible to obtain a common mode interference signal by adding amplification of the signals from several transmitters from several supply lines.
  • an interference source transmitter
  • This interference reaches the interference sink (receiver) via a coupling path and thus influences the receiver.
  • common mode interference sources drive common mode interference currents, which flow in the same direction in all conductors to the receiver.
  • Push-pull interference sources drive push-pull interference currents that propagate in the same way as the useful signal currents.
  • the interference current can be composed of a symmetrical and / or an asymmetrical part. If there is a symmetrical interference current the currents in the lines in push-pull and are also called push-pull interference or DMN. In the case of an asymmetrical interference current, the currents in the lines are in common mode.
  • the ground line forms the
  • CMN common mode disturbances
  • Push-pull disturbances or also called differential mode (DM) noise (hereinafter DMN) (hereinafter DMN) (hereinafter DMN), are generated in the circuit by push-pull interference sources.
  • DMN differential mode noise
  • These push-pull interference sources can have their origin e.g. in
  • Push-pull interference sources are usually arranged in series with the useful signal source.
  • Push-pull interference or DMN can be push-pull interference currents, e.g. in the forward and return line one
  • Common mode interference or also called Common Mode (CM) Noise (hereinafter CMN) (hereinafter CMN) (hereinafter CMN)
  • CMN Common Mode Noise
  • Common mode interference sources can have their origin, for example, in capacitive coupling, raising the potential of ground / ground or grounding points or in potential differences between ground and ground terminals that are spatially separated.
  • Common mode interference sources are usually arranged between a circuit and a reference potential.
  • Common mode interference or CMN can cause common mode interference currents that, for example, flow in the same direction in all conductors of a signal core to the receiver.
  • the amplifier circuit with the inductive transmitters can be looped into or used between the battery or a rechargeable battery and a source of interference.
  • the degree of increase in inductance is determined by defining the
  • Voltage gain of the amplifier circuit is set. By determining a corresponding frequency response of the amplifier, a frequency-dependent increase in the inductance can also be achieved, for example in order to better suppress interference signals with specific frequencies.
  • the self-resonance frequency of the electrical system is reduced by feeding in the correction signal.
  • the radiation behavior of the electrical system is reduced by feeding in the correction signal.
  • An electrical system is preferably understood to mean a circuit comprising a voltage source, consumers and supply lines.
  • the electrical system preferably comprises a rechargeable battery, an electric motor operated via an inverter and intermediate supply lines, the supply lines connecting the rechargeable battery to the inverter and / or the electric motor.
  • the electrical system is a
  • the resulting coil is of high quality and can form an oscillatory resonant circuit with the capacities in the system. To the danger of
  • Interference signals are to be expected, enlarged, and reduced in a range in which the natural resonance frequency of the electrical system lies.
  • the interference signals are preferably to be expected in a higher frequency range than the resonance frequency of the electrical system, so that the increase in inductance is lower at low frequencies or can be eliminated entirely and only becomes effective at higher frequencies.
  • the increase in inductance can preferably be reduced or switched off below a frequency of 50 kFIz, preferably 20 kFIz, and can be correspondingly effective at a higher frequency.
  • the pre-stage can preferably be designed as a low pass or band pass or floch pass or band stop to determine the frequency response.
  • a frequency-dependent increase in the inductance can preferably be formed.
  • the amplifier circuit is designed as a low pass or floch pass or band pass or band stop.
  • Bandstop means the system's natural resonance frequency
  • Flochpass means the suppression of interference signals with higher frequencies than that
  • Low pass means the suppression of interference signals lower frequencies than the natural frequency.
  • Bandpass means the suppression of interference signals lower frequencies than the natural frequency.
  • the inductance of the primary circuit of the first transformer is increased by tapping an interference signal via the second inductive transformer in a first stage of the amplifier circuit and performing voltage amplification, and performing power amplification in a second stage of the amplifier circuit.
  • Supply line is coupled by the supply line is enclosed by a hinged transformer. It can be provided that the coil of a primary circuit of the first and / or further transformer each by a line section of the
  • the primary circuit is formed exclusively by a line section of the supply line. Coupling is thus possible in a simple manner even in the case of rigid bars, the inductance of the primary circuit then being determined by the extent of the ferrite core or the second coil. It can be provided that the amplifier circuit
  • Correction signal is formed by voltage amplification and inversion of the signal tapped by means of the second transformer. It can be provided that the amplifier circuit
  • Natural resonance frequency of the electrical system is reduced, in particular that the natural resonance frequency of the electrical system is determined by setting the gain factor of the amplifier circuit.
  • the second transformer taps the signal from the supply line and the first transformer, in series with the second transformer, feeds a correction signal into the supply line.
  • the object of the invention is further achieved by a device for suppressing interference signals in at least one supply line, preferably for using the method according to one of the
  • the at least one supply line has at least two inductive transmitters which couple an amplifier circuit in an electrically isolated manner to the supply line, the at least two inductive transmitters each having a primary circuit and a secondary circuit, and the at least one primary circuit each
  • the secondary circuit is assigned to the amplifier circuit, and an inductance of the at least one primary circuit of a first transformer is formed in the at least one supply line for suppressing interference signals. It is essential that the amplifier circuit as a discrete semiconductor amplifier, preferably as a two-stage discrete
  • Transistor amplifier is formed and increases the inductance of the at least one primary circuit of the first transformer, in that the amplifier circuit feeds a correction signal into the first transformer, which it by a Voltage amplification of a signal tapped by means of the second transformer forms, in particular around the inductance of the coil in the
  • the device according to the invention increases the inductance purely electronically, in contrast to the real increase in inductance, for example by means of more coil windings.
  • the purely electronic increase means that there are no additional ohmic losses in the supply line. This advantage is essential to be able to transmit high performance without loss.
  • the correction signal is not used to cancel an interference signal by superimposition, but rather to virtually increase the inductance of the primary coil.
  • Another advantage is that, unlike conventional active filters, their filter effect is based on the cancellation of signals based on a
  • Negative voltage feedback means that both at the input and at the output of the amplifier circuit Voltage signal is used.
  • an interference signal of the supply line is fed as voltage to the amplifier via the second inductive transmitter, and a correction signal in the form of a voltage is fed back inductively into the supply line at the output of the amplifier via the first inductive transmitter.
  • Interference signal suppression mainly takes place through a virtual increase in the longitudinal inductance of the first primary circuit in the supply line.
  • a virtual inductance with a higher inductance value is formed depending on the interference signal.
  • the filter effect of the solution according to the invention is preferably based less on extinguishing interference signals by adding an extinguishing signal, but in particular on filtering interference signals analogously to a passive first-order coil filter.
  • it is advantageous that in particular the effective inductance is increased electronically compared to the existing real coil of the first primary circuit. In particular, that their
  • Inductance value and preferably also its quality, is increased electronically. This virtual increase in the inductance of the first primary circuit, so to speak, brings about a passive coil filter of the first order. Depending on
  • Circuit design or wiring of the first primary circuit can also achieve a filter effect of a higher-order coil filter or a higher-order L / C filter.
  • a discrete amplifier is preferably understood to mean an amplifier which is constructed from discrete transistors. These discrete transistors usually have a delay or frequency response or
  • Discrete transistors can be transistors each with their own housing or transistors in which a plurality of transistors are accommodated in one housing, for example in the case of Darlington transistors or transistor arrays.
  • transistor is a collective term for bipolar transistors
  • galvanic isolation means that two circuits are designed separately from one another, i.e. there is no direct galvanic connection via a cable. The circuits are separated by electrically non-conductive coupling elements. With electrical isolation, the electrical potentials of the two circuits are separated from one another, and the circuits are then among themselves
  • the transmitter can preferably be constructed, for example, from two inductances coupled to one another similar to a transformer, the components of the transmitter being specified to ensure good information transmission over a relatively wide frequency range.
  • the preservation of the waveform is of great importance in a transmitter, i.e. a high linearity and as little distortion as possible is desirable for the transformer.
  • the transmitter has a core of punched individual sheets which are insulated from one another by insulating, chemically applied phosphating layers. The insulation drastically reduces eddy currents that would heat the core.
  • the core consists of a ferrite or a ferromagnetic material or an iron.
  • the core can be designed as a ring core or as a split ring core. The advantage of a toroid is that it forms an air-gap-free, closed magnetic circuit. U-cores or E-cores or similar embodiments are also possible.
  • the transmitter can also be designed as an air transmitter. This means that the transformer has two inductors which are inductively coupled to one another by their spatial proximity. A solid core for coupling the inductors is not necessary in this case.
  • Supply line of the voltage source with the amplifier circuit also via a coil, which in the region of the line section Supply line is wound, can be realized.
  • the coil and the line section of the supply line form the transformer.
  • high-voltage sources are voltage sources with voltages> 60 V, preferably> 120 V, most preferably> 240 V.
  • the voltage sources can deliver electrical powers of greater than 500 W, preferably greater than 1 kW, most preferably greater than 10 kW.
  • the device preferably works as follows:
  • the second inductive transformer converts an interference voltage current into a voltage. This voltage is amplified via a pre-stage of the amplifier circuit or influenced in the frequency response. The voltage signal amplified by the preamplifier experiences one in a power amplifier
  • the inductance is increased in the device in a frequency range in which interference signals are to be expected, and in a range in which the natural resonance frequency of the electrical system lies.
  • the interference signals are preferably to be expected in a higher frequency range than the resonance frequency of the electrical system, so that the increase in inductance is lower at low frequencies or can be eliminated entirely and only becomes effective at higher frequencies.
  • the increase in inductance can preferably be reduced or switched off below a frequency of 50 kHz, preferably 20 kHz, and can be correspondingly effective at a higher frequency.
  • the precursor can preferably be used as Low pass or band pass or high pass or bandstop can be designed to set the frequency response.
  • a frequency-dependent increase in the inductance can preferably be formed.
  • the amplifier circuit is designed as a low-pass or high-pass or bandpass or bandstop.
  • Bandstop means the system's natural resonance frequency
  • High pass means the suppression of interference signals with higher frequencies than that
  • Low pass means the suppression of interference signals with frequencies lower than the natural frequency.
  • Bandpass means the suppression of interference signals with frequencies lower than the natural frequency.
  • the resulting coil is of high quality and would form an oscillatory resonant circuit with the capacities in the system. To the danger of
  • the two-stage amplifier circuit has a preliminary stage for voltage amplification and an output stage for current amplification. It can be provided that the input of the amplifier is the input of the preamplifier and the output of the amplifier is the output of the output stage. It can be provided that the amplifier is designed as a discrete amplifier, in particular that the pre-stage and the final stage are formed from discrete semiconductors, preferably from transistors and / or field-effect transistors. This enables a short signal runtime with a simple structure. As a result, good frequency behavior and good phase fidelity are achieved.
  • the preliminary stage and the final stage can preferably have the same type of semiconductor.
  • the preliminary stage can be designed as a push-pull amplifier. This enables a very good signal fidelity and a wide one
  • the pre-stage can be constructed as a symmetrical push-pull amplifier.
  • the base current of the semiconductor amplifier preferably the transistors of the preamplifier of the amplifier circuit
  • a constant current source preferably that the constant current source has a field effect transistor or MOSFET (metal oxide semiconductor field effect transistor).
  • MOSFET metal oxide semiconductor field effect transistor
  • Signal runtime between input and output which is less than or equal to 500 ns, preferably less than or equal to 20 ns, most preferably less than or equal to 6 ns. This means that both at low frequencies and at high ones
  • Frequencies allows good interference suppression.
  • Voltage gain can be, for example, 2 or 4 or 8 or 16 or 32 or an intermediate value.
  • a sufficient effect in terms of a virtual increase in the inductance of the coil of the primary circuit of the first transformer can already be achieved in the voltage amplification.
  • the frequency response or the phase fidelity or signal delay time of the amplifier can be positively influenced by a low amplification factor.
  • the output stage can be cascaded and the preliminary stage controls a number of cascadable output stages, in particular two cascaded output stages or four cascaded output stages or six cascaded output stages or eight cascaded output stages.
  • the preliminary stage controls a number of cascadable output stages, in particular two cascaded output stages or four cascaded output stages or six cascaded output stages or eight cascaded output stages.
  • the amplifier circuit increases the inductance of the first transformer by voltage amplification of the tapped signal in the amplifier.
  • the increase in inductance can be determined by the measure of the voltage amplification of the amplifier circuit.
  • Natural resonance frequency of the electrical system reduced. This will in particular the radiation behavior of the supply line is reduced in the case of interference signals.
  • Supply line are looped in, preferably form a line section of the supply line, and that the inductance of the primary circuits is designed for a power greater than or equal to 100 W, preferably 500 W, most preferably 1 kW.
  • the supply line has a voltage of greater than or equal to 60 V, preferably greater than or equal to 120 V, most preferably greater than or equal to 240 V.
  • the supply line is designed as a single-pole supply line.
  • Supply line have multiple lines, for example, be designed as a multi-pole or as a multi-phase power supply line with several individual lines. It can be provided that the two transmitters are serial in the
  • the coils of the primary circuits of the transformers are each formed by a line section of the supply line. This enables a particularly simple assembly, since a line section of the supply line does not have to be interrupted, but rather directly forms the inductance of the primary circuit.
  • a coil of the transformer can be inductively coupled to this line section, and / or a core of the inductive transformer can be connected to the line section of the
  • Supply line are coupled, for example by placing the core on the line section of the supply line. It can be provided that the core of the inductive transmitter is a
  • Has core material made of a ferrite or a ferromagnetic material or an iron.
  • the supply line is designed for the voltage or power supply of an electric motor, in particular a traction drive or an air conditioning compressor.
  • Supply line can be connected to a supply battery and have a y-capacitor for current buffering.
  • the inductive transformer is designed as a toroidal core transformer with one turn per line. It can also be provided that the inductive transformer has a ring core and the
  • Supply line is passed through the toroid, or that one turn is formed per supply line.
  • the inductance of the primary circuit has a single primary circuit coil.
  • the inductance of the primary circuit has a plurality of separate primary circuit coils or a primary circuit coil with a plurality of windings or taps.
  • the transmitter has a core material made of a ferrite or a ferromagnetic material or an iron.
  • the transformer is designed to be foldable in order to enclose the supply line and to connect it inductively to a line section of the supply line.
  • the transmitter from the primary circuit to the secondary circuit has a transmission ratio of greater than or equal to 1 to 1 or greater than or equal to 1 to 4, preferably greater than or equal to 1 to 10, most preferably greater than or equal to 1 to 100.
  • Suppression of interference signals for a plurality of supply lines or multiphase supply lines is formed by the device having an inductive transformer, the primary circuit of the inductive transformer having a plurality of coils, each of which is connected to one of the plurality of supply lines and the secondary circuit of the transformer being connected to the amplifier circuit.
  • the device for suppressing interference signals for several supply lines or for multi-phase can further be provided that the device for suppressing interference signals for several supply lines or for multi-phase
  • Supply lines is formed by the device having a plurality of transmitters corresponding to the number of supply lines, the primary circuit of an inductive transmitter having one of each
  • the device for suppressing interference signals in bipolar voltage sources is designed with a positive and a negative supply line, in that the device has two transmitters, a first transmitter with its primary circuit of the positive supply line and the second transmitter with its Primary circuit of the negative supply line are assigned and the secondary circuit of both transmitters are connected to the same amplifier circuit.
  • the voltage source has a battery or a rechargeable battery, in particular a traction battery, and supplies an electric motor with electrical energy
  • the interference to be filtered can, for example, from one to the
  • Supply line connected interference source which is a converter or a voltage converter or an inverter or a speed controller
  • the amplifier circuit has a
  • Has voltage supply which is derived from the supply line, preferably that the amplifier circuit has a symmetrical
  • Has voltage supply which is derived from a positive and a negative supply line, or that the amplifier circuit has a voltage supply, which consists of a separate
  • Low voltage source is derived. It can be provided that the preliminary stage and the final stage are one
  • an interference suppression module for retrofitting voltage sources, in particular high-voltage voltage sources, in one
  • Drive train of an electric vehicle comprising a housing in which a device for suppressing interference signals according to one of the
  • the interference source has a housing with an installation space for receiving the amplifier circuit or the interference suppression module, the amplifier circuit or the interference suppression module being accommodated in the installation space and being mechanically connected to the housing of the interference source.
  • the task is further solved by a traction drive for a
  • Electric vehicle comprising a traction battery, an electric motor which is supplied with energy from the traction battery via a speed controller, and a supply line which connects the speed controller to the traction battery. It is essential that the supply line is a device for suppressing interference signals according to one of the preceding
  • the object is further achieved by a method for producing a traction drive with a device for suppressing interference signals according to one of the preceding explanations, in that the supply line / s is / are interrupted in a first step and a device in accordance with
  • the object is further achieved by a method for suppressing DMN according to one of the preceding methods, in that the DMN interference signal is read out by placing the transmitter in only one supply line for reading out a signal, or by using a
  • a DMN interference signal is received. Then a correction signal is generated from the interference signal in the amplifier circuit, which feeds into the first transformer in a supply line in order to electronically increase the inductance of the coil in the supply line, preferably the primary coil of the first transformer, and thus to suppress the interference signal.
  • the object is further achieved by a method for suppressing CMN, in accordance with one of the preceding methods, in that the CMN interference signal is read out in a plurality of supply lines for reading out a signal by means of a plurality of primary circuit coils of the transformer, or by an addition amplification of the signals from a plurality Transmitters in several supply lines a CMN interference signal is obtained. Then it turns out the interference signal in the amplifier circuit generates a correction signal which feeds into a supply line in the first transformer, in particular in order to electronically increase the inductance of the coil in the supply line, preferably the primary coil of the first transformer, and thereby suppress the interference signal.
  • FIG. 1 shows the first exemplary embodiment according to the invention of a
  • FIG. 2 shows the first exemplary embodiment according to the invention of a device for suppressing interference signals in a supply line
  • 3a shows the voltage curve between the measuring points 6 from FIG. 1 with a passive filter in the supply line 8 without
  • FIG. 3d Fourier transformation of the voltage curve from FIG. 3c; Fig. 4 second embodiment of the invention
  • Fig. 5 First inventive embodiment of a device for suppressing interference signals in two
  • FIG. 1 shows an exemplary embodiment of a circuit arrangement such as can be used, for example, in an electric vehicle for a traction drive.
  • the circuit arrangement has a bipolar
  • Interference signals can preferably occur in the form of DMN (differential mode noise, also called push-pull interference) and can be suppressed by the device 1.
  • DMN differential mode noise, also called push-pull interference
  • the device 1 is arranged in the upper supply line 8 between a choke 3 and the frequency converter 5 and has one
  • Amplifier circuit 2 on. Between amplifier circuit 2 and High voltage source 4, two chokes 3 and an X capacitor 7 are arranged. In order to illustrate the effect of the interference voltage suppression, two measuring points 6 are shown in the circuit arrangement. At the measuring points 6, the voltage change between the
  • Supply lines 8 are measured, which provides information about interference signals between high-voltage source 4 and frequency converter 5.
  • the amplifier circuit 2 is over a first
  • Transmitter 9 through lines B1 and B2 and a second transmitter 10 through lines A1 and A2 are inductively coupled to supply line 8 and electrically isolated from it.
  • the transmitters 9 and 10 are
  • the transformers 9 and 10 are composed of a primary circuit with a primary circuit coil 11, which are arranged in the supply line 8, and a secondary circuit with a secondary circuit coil 12
  • the primary circuit and the secondary circuit can be coupled to one another via a core.
  • Supply line 8 two inductors are formed.
  • Primary circuit coils 11 must have the maximum power
  • Supply line 8 can be designed.
  • the white dots shown in FIG. 2 in the transformer 2, which represent the start of the winding, mean the same winding sense if the dots in the primary circuit and in the secondary circuit are arranged on the same side. Moving a point from left to right then corresponds to an opposite winding sense. This applies to all of the following
  • the primary circuit coils 11 in the supply line 8 already act by their inductance to suppress interference signals.
  • the inductance of the primary circuit coil 11 of the first transformer 9 is increased in that an interference signal is read out via the second transformer 10 and into the circuit via the lines A1 and A2
  • Amplifier circuit 2 is fed.
  • the amplifier circuit 2 forms a correction signal from this interference signal and feeds the correction signal via the lines B1 and B2 into the primary circuit coil 11 of the first transformer 9.
  • the correction signal fed in superimposes the interference signal and reduces it.
  • the fed correction signal is with a low
  • FIGS. 3a to 3c The change in voltage, measured between measuring points 6 in FIG. 1, is shown in FIGS. 3a to 3c.
  • Figure 3a shows the
  • FIG. 3b shows the Fourier transformation of the voltage curve from FIG. 3a.
  • no device 1 according to the invention for suppressing interference signals is interposed; only the primary circuit coil 11 is present in the supply line 8 as a purely passive choke.
  • FIGS. 3c and 3d show the voltage curve with the device 1 according to the invention, ie with an amplifier circuit 2 interposed.
  • FIG. 3c shows the voltage curve when a periodic trapezoidal interference signal occurs between the floch voltage source 4 and the frequency converter 5, the device 1 with the amplifier circuit 2 in FIG
  • FIGS. 7 and 7a each show an example of an amplifier circuit for implementing the method according to the invention for suppressing
  • Interference signals or for implementing the device according to the invention for suppressing interference signals are shown.
  • a simulation of the circuit arrangement from FIG. 1 with that of the device 1 from FIG. 2 results in a computational increase in the inductance of the inductor in the case of an intermediate amplifier circuit 2 from FIG. 7 or FIG
  • Primary circuit coil 11 in the first transformer 9 with a factor of approximately fifty. This means that with a passive primary circuit coil 11 in the first
  • a primary circuit coil 11 is achieved in the first transformer 9 with a virtual inductance of approximately 24 pH.
  • the amplifier circuit 2 acts like additional windings in the primary circuit coil 11. This can be expressed arithmetically by
  • N 2 (N + Videal) 2 with N equal to the number of windings in the primary circuit coil 1 1 and Videai equal to the gain factor.
  • the gain factor Vdeai also has a complex correction factor Vkorr and a normalization factor Vnorm, since the correction factor changes with the inductance behavior.
  • the increased inductance of the primary circuit coil 11 Lprim of the first transformer with an intermediate amplifier circuit 2 can thus be calculated as follows:
  • Figure 4 shows a circuit arrangement with a bipolar
  • High-voltage source 4 a frequency converter 5 and a device 1 for suppressing interference signals, preferably CMN (Common Mode Noise, also called common mode interference).
  • CMN Common Mode Noise, also called common mode interference.
  • the device 1 is in both
  • Supply line 8 is arranged and has an amplifier circuit 2.
  • An X capacitor 7 and a choke 3 are arranged between the amplifier circuit 2 and the high voltage source 4.
  • the change in voltage between the supply lines 8 can be measured at the measuring points 6, which provides information about interference signals between high-voltage source 4 and frequency converter 5. Between the high voltage source 4, the
  • Frequency converter 5 and the supply lines 8, Y capacitors 17 are arranged in the direction of the ground.
  • Figure 5 shows a further embodiment of the device 1 for
  • the exemplary embodiment in FIG. 5 differs from the exemplary embodiment in FIG. 2 only in that in FIG. 5 the transmitters 9 and 10 are inductively coupled to both supply lines 8. Both point to this
  • Supply lines 8 each have a primary circuit coil 11. As in FIG. 2, the inductivities of the primary circuit coils 11 already act in FIG. 5 as passive filters for suppressing interference signals against CMN.
  • FIG. 6 shows the voltage curve and the Fourier transformation of the voltage curve for a filter circuit from FIG. 5 with a
  • FIGS. 6a to 6c The change in the voltage, measured between the measuring points 6 in FIG. 4, is shown in FIGS. 6a to 6c.
  • Figure 6a shows the
  • Frequency converter 5 is fed a periodic trapezoidal interference signal.
  • FIG. 6b shows the Fourier transformation of the voltage curve from FIG. 6a.
  • FIGS. 6a and 6b show no device 1 according to the invention interposed to suppress interference signals, there are only the primary circuit coils 11 in the supply lines 8 as purely passive
  • FIG. 6a shows the voltage curve when a periodic trapezoidal interference signal is fed in between the floch voltage source 4 and the frequency converter 5, the device 1 with the amplifier circuit 2 being arranged in the supply lines 8.
  • FIG. 6d shows the Fourier transformation of the voltage curve from FIG. 6c.
  • a simulation of the circuit arrangement from FIG. 4 with that of the device 1 from FIG. 5 results in a computational increase in the inductance of the two primary circuit coils 11 in the first transformer 9 by a factor of approximately fifty in the case of an intermediate amplifier circuit 2 from FIG. 7 or FIG. 7a .
  • the amplifier circuit 2 acts like additional windings in the primary circuit coils 11. This can be expressed arithmetically by
  • N 2 (N + Videal) 2 with N equal to the number of windings in the primary circuit coils 11 and Videai equal to the gain factor.
  • the gain factor Videai also has a complex correction factor Vkorr and a normalization factor Vnorm, since the correction factor changes with the inductance behavior.
  • the increased inductance of the primary circuit coils 11 Lprim of the first transformer with an amplifier circuit 2 interposed can thus be calculated as follows:
  • FIG. 7 and FIG. 7a each show an embodiment of the
  • Amplifier circuit 2 with a preamplifier 14 and an output stage 15.
  • the input of the preamplifier 14 is connected to lines A1 and A2 from FIGS. 2 or 5 and reads an interference signal through the second transformer 10.
  • the output of the output stage 15 is connected to the first transformer 9 via the two lines B1 and B2 and feeds a correction signal into the
  • the amplifier circuit 2 is a two-stage discrete
  • Transistor gain formed This has the advantage that a very short signal runtime can be realized.
  • the separation into a first amplifier stage for voltage amplification and a second amplifier stage for power amplification also makes it easy to adapt the
  • the preliminary stage 14 the voltage is amplified and the signal is inverted.
  • the first stage is designed as a push-pull amplifier and has two transistors T1 and T2, one of which Carry out voltage amplification of the interference signal.
  • the base current of the transistors T1 and T2 is stabilized via a constant current source, each with a MOSFET (metal oxide semiconductor field effect transistor) T5 and T6.
  • MOSFET metal oxide semiconductor field effect transistor
  • the output stage 15 In a second stage of the amplifier circuit 2, the output stage 15, two transistors T3 and T4 are arranged which provide current amplification or
  • the base current of the output stage transistors T3 and T4 is also stabilized by means of a MOSFET (metal-oxide-flat conductor field-effect transistor) T 7 and T8. This allows particularly good stabilization even with large temperature fluctuations.
  • MOSFET metal-oxide-flat conductor field-effect transistor
  • a voltage of ⁇ 12V is applied to the transistors T1 and T2 and to the transistors T3 and T4 by means of a symmetrical low-voltage source U1 and U2 as well as U3 and U4.
  • the preliminary stage 13 and the final stage 13 can be fed from the same symmetrical low-voltage source.
  • U1 is U3 and U2 is U4.
  • separate symmetrical low-voltage sources U1, U2 or U3, U4 can be used for the preliminary stage 12 and the final stage 13.
  • the symmetrical low-voltage source U1, U2, or U3, U4 can be fed from the Flochvolts voltage source via a voltage converter.
  • the low-voltage source U1, U2, or U3, U4 can be fed from a separate network, for example a 12V or 24V electrical system of an electric vehicle.
  • the output stage has a cascaded push-pull output stage 16, only one in each of the exemplary embodiments shown in FIG. 7 or FIG. 7a Push-pull output stage 16 is shown.
  • a cascaded push-pull output stage 16 is shown.
  • up to eight push-pull output stages 16 can be cascaded. If the preliminary stage is designed accordingly, more push-pull stages 16 can also be cascaded.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

La présente invention concerne un procédé permettant de supprimer les signaux brouilleurs dans au moins une ligne d'alimentation, en particulier dans au moins une ligne d'alimentation pour sources de tension à haut voltage dans une chaîne cinématique d'un véhicule électrique. La ou les lignes d'alimentation présentent au moins deux transmetteurs inductifs qui couplent un circuit amplificateur, séparé galvaniquement, à la ligne d'alimentation. Les deux transmetteurs inductifs ou plus présentent respectivement un circuit primaire et un circuit secondaire, chaque circuit primaire étant associé à la ligne d'alimentation et chaque circuit secondaire étant associé au circuit amplificateur (2), une inductance du ou des circuits primaires d'un premier transmetteur dans la ou les lignes d'alimentation étant conçue pour supprimer les signaux brouilleurs, et un signal provenant de la ligne d'alimentation étant pris au moyen d'un deuxième transmetteur et amené à une entrée du circuit amplificateur (2). Il est essentiel pour l'invention que l'inductance du ou des circuits primaires du premier transmetteur soit augmentée du fait que le circuit amplificateur (2) fournit un signal de correction dans le premier transmetteur et le circuit amplificateur (2) forme le signal de correction en fonction du signal brouilleur par amplification à partir du signal du deuxième transmetteur inductif.
PCT/EP2019/073853 2018-09-07 2019-09-06 Procédé et circuit amplificateur pour augmenter une inductance WO2020049161A2 (fr)

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DE112019004466.4T DE112019004466A5 (de) 2018-09-07 2019-09-06 Verfahren und verstärkerschaltung zum erhöhen einer induktivität

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DE102018121936.9 2018-09-07
DE102018121936.9A DE102018121936A1 (de) 2018-09-07 2018-09-07 Verfahren und Verstärkerschaltung zum Erhöhen einer Induktivität

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Citations (1)

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DE102004015082A1 (de) * 2004-03-25 2005-10-27 Stz Mechatronik Verfahren und eine Anordnung zum induktiven Entkoppeln hochfrequenter Wechselstromsignale
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