EP4573646A1 - Filter mit y-kondensatoren und veränderbarer dämpfung für 3-leitungs-dc-bordnetz - Google Patents
Filter mit y-kondensatoren und veränderbarer dämpfung für 3-leitungs-dc-bordnetzInfo
- Publication number
- EP4573646A1 EP4573646A1 EP23744061.5A EP23744061A EP4573646A1 EP 4573646 A1 EP4573646 A1 EP 4573646A1 EP 23744061 A EP23744061 A EP 23744061A EP 4573646 A1 EP4573646 A1 EP 4573646A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- connection
- capacitor
- circuit
- resistance
- filter
- 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- Withdrawn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
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from DC input or output
-
- 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
- H02J1/00—Circuit arrangements for DC mains or DC distribution networks
- H02J1/08—Three-wire DC power distribution systems; Systems having more than three wires
Definitions
- Power converter for an on-board electrical system of an electrically driven vehicle and on-board electrical system for an electrically driven vehicle
- the present invention relates to a power converter for an on-board electrical system of an electrically driven vehicle, having a first line for a first potential, a second line for a second potential, a third line for a reference potential and a filter device which has a first connection which is connected to the first line is connected, a second connection which is connected to the second line, a third connection which is connected to the third line, a first capacitor which is connected in a first current path from the first connection to the third connection and a first impedance along the first current path for deriving a common mode current related to the first and second lines to the third terminal, a second capacitor which is connected in a second current path from the second terminal to the third terminal and a second impedance along the second current path for dissipating the common mode current influenced towards the third connection, and a switching device which is set up to switch between a first filter mode and a second filter mode depending on control information.
- the invention relates to an on-board electrical system for an electrically driven vehicle.
- the DE 10 2017 220 982 A1 discloses a traction network in an electric or hybrid vehicle.
- the traction network includes a high-voltage battery that is connected to a pulse inverter via a positive high-voltage line and a negative high-voltage line.
- a Y capacitor is connected to the positive and negative high-voltage lines.
- the Y capacitors are assigned a switching element that can be controlled by a control unit depending on at least one operating state.
- the DE 102021 003 180 A1 discloses an electrical on-board electrical system for an electrically operable vehicle with a first electrical potential line and a second electrical potential line, between which the on-board electrical system is supplied with a direct electrical voltage.
- the vehicle electrical system has two first interference suppression capacitors, which are electrically connected in series and are each electrically coupled to the potential lines with a connection.
- the on-board electrical system also has a switch.
- on-board electrical systems in particular high-voltage on-board electrical systems, are typically designed as IT systems in which a first and second potential of a traction battery are isolated from a reference potential, in particular a vehicle housing potential.
- Power converters that are used in such on-board electrical systems and whose first and second lines can be connected to the first and second potential of the traction battery can generate high-frequency interference signals during their operation, which must be filtered using a filter device for reasons of electromagnetic compatibility.
- a filter device has two capacitors, which serve in particular to derive a common mode current on the first and second lines to a third line that is at the reference potential.
- the amount of energy stored in the first and second capacitors of the filter device also increases with the square of the vehicle electrical system voltage.
- Relevant standards such as ISO 6469-3, limit this amount of energy to a specified value.
- electrical charges stored in the capacitors and flowing out via the third line can be kept below a limit that is dangerous for the human body.
- an energy budget specified by the design of the on-board electrical system must therefore be adhered to.
- the invention is based on the object of providing an improved possibility for operating a power converter in an on-board electrical system of an electrically driven vehicle.
- the filter device has at least one resistance circuit with a first resistance component and with a second resistance component and the switching device is further set up to change the connection of the resistance components within the filter device in the first Filter mode to provide the first impedance and the second impedance each with a predetermined amount and in the second filter mode to provide the first impedance and the second impedance each with a predetermined amount that is increased compared to the first filter mode.
- the power converter according to the invention for an on-board electrical system of an electrically driven vehicle has a first line for a first potential, a second line for a second potential and a third line for a reference potential.
- the power converter according to the invention also has a filter device.
- the filter device has a first connection, a second connection and a third connection.
- the first port is connected to the first line.
- the second connection is connected to the second line.
- the third port is connected to the third line.
- the filter device further has a first capacitor and a second capacitor. The first capacitor is connected to a first current path from the first connection to the third connection.
- the first capacitor influences a first impedance along the first current path to divert a common mode current toward the third terminal.
- the common mode current is related to the first line and the second line.
- the second capacitor is connected to a second current path from the second connection to the third connection.
- the second capacitor influences a second impedance corresponding to long of the second current path for dissipating the common mode current towards the third connection.
- the filter device also has at least one resistance circuit.
- the at least one resistance circuit has a first resistance component and a second resistance component.
- the filter device also has a switching device. The switching device is set up to switch between a first filter mode and a second filter mode depending on control information.
- the switching device is further set up to provide the first impedance and the second impedance each with a predetermined amount by changing a connection of the resistance components within the filter device in the first filter mode.
- the switching device is also set up to provide the first impedance and the second impedance each with a predetermined amount that is increased compared to the first filter mode by changing the connection in the second filter mode.
- the time course of a body current in the event of an insulation fault can advantageously be limited more precisely, since the different impedances allow a modification of a discharge time of the energy stored in the first and second capacitor to the third connection. In this way, in particular, a discharge time constant resulting from the body resistance and the respective impedances can be placed in a range with no or little risk of fibrillation.
- the capacitances of the first capacitor and the second capacitor can also act as Y capacitances in the second filter mode and thus enable at least partial suppression of common mode interference in the second filter mode.
- the power converter according to the invention can be designed as an inverter, as a DC-DC converter or as an active rectifier.
- the power converter according to the invention can further have a housing in which at least the first line, the second line, the third line and the filter device are included.
- the third line can be connected to the housing in an electrically conductive manner.
- the reference potential can also be understood as housing potential.
- the first potential is different from the second potential.
- the first potential is preferably greater than the second potential.
- the reference potential is preferably between the first potential and the second potential.
- the reference potential can also be understood as ground potential.
- the first line and the second line are each designed completely or at least in sections as solid busbars.
- the first and second lines can be connected to a DC voltage connection, on which in particular a connection device for electrically contacting the power converter with a DC voltage source is formed.
- the filter device is preferably arranged on the DC voltage connection side.
- the third line is not necessarily designed as a busbar.
- the third line can be formed by a cable, a ground surface or by a fastening means through which the filter device is fastened in the power converter, in particular to the housing.
- a portion of the common mode current flowing along the first line can be derived via the first impedance via the first current path.
- a portion of the common mode current flowing along the second line can be derived via the second impedance via the second current path.
- the first capacitor and the second capacitor can each have a first connection and a second connection, between which the capacitance of the capacitor is provided.
- the first connection of the first capacitor can be connected to the first connection of the filter device.
- the first connection of the second capacitor can be connected to the second connection of the filter device.
- the first capacitor and the second capacitor can each be formed by a capacitor component or a plurality of capacitor components connected to one another.
- a resistance circuit that has a first resistance component and a second resistance component can be provided.
- a plurality of resistance circuits, each of which has a first resistance component and a second resistance component, can also be provided.
- the or a respective resistance circuit can have a first connection and a second connection.
- the first resistance component and the second resistance component can each have a first connection and a second connection, between which the ohmic resistance of the resistance component is provided.
- the switching device is preferably a semiconductor switching device, which in particular has one or more transistor structures.
- the switching device it is also possible for the switching device to be an electromechanical switching device, which has, for example, one or more relays.
- the filter device of the power converter according to the invention is set up to set a higher time constant of a low pass formed from the capacitors and the at least one resistor circuit for filtering the common mode current along the first current path and the second current path in the second filter mode than in the first filter mode. In this way, the risk of fibrillation in the second filter mode can be specifically placed in a range that corresponds to the relevant standards.
- the filter device of the power converter according to the invention has a center node which lies between the first capacitor and the second capacitor.
- at least one resistance circuit is connected to the terminal of the first capacitor or the second capacitor facing the center node.
- the at least one resistance circuit is connected to the second connection of the first capacitor or to the second connection of the second capacitor.
- the connection of the first capacitor facing the center node can be its second connection.
- the connection of the second capacitor facing the middle node can be its second connection.
- a resistance circuit is connected in a circuit branch between the middle node and the third connection. Then the first connection of the resistance circuit is preferably connected to the third connection and the second connection of the resistance circuit is connected to the middle node.
- a resistance circuit is connected in series with the first capacitor in a circuit branch between the first connection and the center node.
- the first connection of the resistance circuit is in particular connected to the second connection of the first capacitor.
- the second connection of the resistance circuit is connected in particular to the middle node.
- a resistance circuit can be connected in series with the second capacitor in a circuit branch between the second connection and the center node.
- the first connection of the resistance circuit is in particular connected to the second connection of the second capacitor.
- the second connection of the resistance circuit is connected in particular to the middle node.
- the at least one resistance circuit can therefore have one resistance circuit, two resistance circuits or three resistance circuits that are connected as described above.
- the resistance circuit can also be designed differently.
- the power converter according to the invention provides that the switching device has a switch for the or a respective resistance circuit.
- the switch can have a first connection and a second connection as well as a switching path that can be controlled depending on the control information between the first connection of the switch and the second connection of the switch.
- the switch forms a series connection with the first resistance component, with the second resistance component being connected in parallel to the series connection.
- the total resistance of the resistance circuit can correspond either to the resistance value of the second resistance component or to the reciprocal of the sum of the reciprocals of the resistance values of the first and second resistance components.
- first connection of the resistance circuit, the first connection of the switch and the first connection of the second resistance component form a common circuit node.
- the second connection of the switch can be connected to the first connection of the first resistance component.
- the second connection of the first resistance component, the second connection of the second resistance component and the second connection of the resistance circuit can form a common circuit node.
- the switch forms a parallel connection with the second resistance component, the first resistance component being connected in series to the parallel connection. That's how he can Total resistance of the resistance circuit, depending on the switching state of the switch, corresponds either to the resistance value of the first resistance component or to the sum of the resistance values of the first and second resistance components.
- the first connection of the first resistance component, the first connection of the switch and the first connection of the resistance circuit can form a common circuit node.
- the second connection of the first resistance component, the second connection of the switch and the first connection of the second resistance component can form a common circuit node.
- the second connection of the second resistance component can be connected to the second connection of the resistance circuit.
- the resistance value of the first resistance component is smaller than the resistance value of the second resistance component.
- a lower total resistance of the resistance circuit can be specified in the first filter mode than in the second filter mode.
- the switching device can be designed as a bidirectionally conducting and/or blocking switch.
- the capacitances of the first capacitor and the second capacitor can be the same. This enables a particularly symmetrical voltage distribution across the first and second capacitors.
- the filter device can further have a third capacitor which is connected in parallel to the first capacitor and to the second capacitor to the first connection of the filter device and to the second connection of the filter device.
- the third capacitor can provide a fixed X capacitance.
- the filter device has a circuit board.
- the first capacitor, the second capacitor and the at least one resistance circuit can be arranged on the circuit board.
- the third capacitor can also be arranged on the circuit board.
- the first to third connections of the filter device can be arranged on the circuit board.
- the switching device can be arranged on the circuit board.
- the power converter according to the invention can also have an intermediate circuit capacitor which is connected between the first line and the second line.
- the power converter according to the invention can further have a converter circuit which is connected between the first line and the second line.
- the converter circuit can have power semiconductor switches, which are connected in particular as a switching cell, power bridge or as a B6 bridge circuit, in order to convert the voltage present between the first line and the second line in a switching operation.
- the filter device is preferably arranged on the side of the intermediate circuit capacitor facing away from the converter circuit.
- the power converter according to the invention can further have inductive filter elements which act as series inductances in the first line and the second line and on the intermediate circuit capacitor side and/or on the DC voltage input side. are arranged in particular spatially close to the filter device.
- the filter elements can be formed around the lines by ferrite cores, such as nanocrystalline cores, iron powder cores or other cores made of magnetic material.
- parasitic inductances along the first line and the second lines between the DC voltage connection on the one hand and the first connection and the second connection of the filter device or the DC voltage connection side filter elements on the other hand are lower than between the first connection and the second connection of the filter device or the intermediate circuit capacitor side filter elements on the one hand and the DC link capacitor on the other hand.
- an on-board electrical system for an electrically driven vehicle having at least one previously described power converter, a traction battery, a charging device which can be connected to an electrical network external to the vehicle for charging or discharging the traction battery, and a control device which is set up to provide the control information for entering the second filter mode if and / or as long as the charging device is connected to the vehicle-external electrical network.
- the first filter mode can advantageously be specified in a ferry operation of the vehicle or the on-board electrical system and the second filter mode can be specified in a charging operation.
- the traction battery preferably has a nominal voltage of at least 400 volts, preferably at least 600 volts, particularly preferably at least 800 volts.
- a power converter of the vehicle electrical system can be designed as an inverter that is designed to drive an electrical machine, in particular a permanent one or electrically excited, synchronous machine, an axial flux motor or an asynchronous machine, to supply electricity with a multi-phase alternating voltage to drive the vehicle.
- a power converter of the on-board electrical system can form part of the charging device and can be set up to convert a direct or alternating voltage provided by the vehicle-external electrical network into a direct voltage for charging the traction battery.
- a power converter of the on-board electrical system can be designed as a DC-DC converter, which is set up to couple the on-board electrical system with another on-board electrical system, in particular a low-voltage on-board electrical system, of the vehicle.
- a potential of the low-voltage electrical system can correspond to the reference potential.
- the on-board electrical system can also have an electrical line, for example an electrically conductive fastening or a ground strap, by means of which the third line of the at least one power converter is electrically conductively connected to a body of the vehicle.
- an electrical line for example an electrically conductive fastening or a ground strap
- FIG. 1 is a circuit diagram of a first exemplary embodiment of the power converter according to the invention.
- FIG. 2 shows a schematic diagram of the power converter according to the exemplary embodiment
- FIG. 3 shows a circuit diagram of the filter device according to a second exemplary embodiment of the power converter according to the invention
- 4 shows a circuit diagram of the filter device according to a third exemplary embodiment of the power converter according to the invention.
- Fig. 5 is a block diagram of an exemplary embodiment of the on-board electrical system according to the invention in a vehicle.
- FIG. 1 is a circuit diagram of an exemplary embodiment of a power converter 1.
- the power converter 1 has a first line 2 for a first potential 3, a second line 4 for a second potential 5, and a third line 6 for a reference potential 7, which can also be considered a ground potential.
- the first potential 3 is higher than the second potential 5 and the power converter 1 is set up to be operated with a potential difference between the first potential 3 and the second potential 5 of 800 volts.
- the reference potential 7 is, for example, between the first potential 3 and the second potential 5.
- the power converter 1 also has a filter device 8.
- the filter device 8 serves as an interference filter, i.e. to improve the electromagnetic compatibility of the power converter 1, and is preferably arranged close to a DC voltage connection 9.
- the filter device 8 has a first connection 10, which is connected to the first line 2, a second connection 11, which is connected to the second line 4, and a third connection 12, which is connected to the third line 6.
- the filter device 8 has a first capacitor 13, which is connected in a first current path 14 from the first connection 10 to the third connection 12 and influences a first impedance along the first current path 14 to derive a common mode current to the third connection 12.
- the common mode current is related to the first and second lines 2, 4.
- the filter device 8 also has a second capacitor 15, which is connected to a second current path 16 from the second connection 11 to the third connection 12. is switched on and influences a second impedance along the second current path 16 for deriving the common mode current related to the first and second lines 2, 4 to the third connection 12.
- a portion of the common mode current flowing on the first line 2 can be derived from the first connection 10 to the third connection 12 via the first current path 14.
- a portion of the common mode current flowing on the second line 4 can be derived from the second connection 11 to the third connection 12 via the second current path 16.
- the current paths 14, 16 are illustrated purely schematically in FIG. 1 by dashed lines.
- the capacitors 13, 15 each have a first connection 13a, 15a and a second connection 13b, 15b.
- the filter device 8 has a first resistance circuit 17 and a second resistance circuit 18.
- the resistance circuits 17, 18 each have a first resistance component 19 and a second resistance component 20.
- the resistance circuits 17, 18 each have a first connection 17a, 18a and a second connection 17b, 18b.
- the resistance components 19, 20 each have a first connection 19a, 20a and a second connection 19b, 20b.
- the filter device 8 has a switching device 21.
- the switching device 21 is set up to switch between a first filter mode and a second filter mode depending on control information 22.
- the switching device 21 changes a connection of the resistance components 19, 20 within the filter device in such a way that in the first filter mode the first impedance and the second impedance are each provided with a predetermined amount and in the second filter mode the first impedance and the second impedance are each provided with a relative value first filter mode to provide an increased predetermined amount.
- the filter device 8 is accordingly set up to set a higher time constant of a low pass formed from the capacitors 13, 15 and the resistance circuits 17, 18 for filtering the common mode current in the second filter mode along the first current path 14 and the second current path 16 than in the first filter mode .
- the filter device 8 has a center node 23 between the first capacitor 13 and the second capacitor.
- the first resistance circuit 17 is connected in series with the first capacitor 13 between the first terminal 10 and the center node 23.
- the second resistance circuit 18 is connected in series with the second capacitor 15 between the second terminal 11 and the center node 23.
- the first resistance circuit 17 is connected to the second connection 13b of the first capacitor 13 facing the center node 23.
- the second resistance circuit 18 is connected to the second terminal 15b of the second capacitor 15 facing the center node.
- the middle node 23 is connected directly to the third connection 12 of the filter device 8.
- the first current path 14 is led from the first connection 10 via the first capacitor 13, the first resistance circuit 17 and the middle node 23 to the third connection 12.
- the second current path is led from the second connection 11 via the second capacitor 15, the second resistance circuit 18 and the middle node to the third connection 12.
- the first connection 13a of the first capacitor 13 is connected to the first connection 10 of the filter device 8.
- the first connection 15a of the second capacitor 15 is connected to the second connection 11 of the filter device 8.
- the first connection 17a of the first resistance circuit 17 is connected to the second connection 13b of the first capacitor 13.
- the second connection 17b of the first resistance circuit 17 is connected to the center node 23.
- the first connection 18a of the second resistance circuit 18 is connected to the second connection 15b of the second capacitor 15.
- the second connection 18b of the second resistance circuit 18 is connected to the center node 23.
- the switching device 21 has a first switch 24 for the first resistance circuit 17 and a second switch 25 for the second resistance circuit 18.
- the switches 24, 25 each have a first connection 24a, 25a and a second connection 24b, 25b, between which a switching path that can be controlled depending on the control information 22 is formed.
- the switching device 21 is set up to switch the respective switch 24, 25 on to assume the first filter mode and off to assume the second filter mode.
- a respective switch 24, 25 forms a series connection with the first resistance component 19.
- the second resistance component 20 is connected in parallel to the series connection of the switch 24, 25 and the first resistance component 19.
- the first connection 24a of the first switch 24 the first connection 20a of the second resistance component 20 and the first connection 17a of the first resistance circuit 17 form a common circuit node.
- the second connection 24b of the first switch 24 is connected to the first connection 19a of the first resistance component 19.
- the second connection 19b of the first resistance component 19, the second connection 20b of the second resistance component 20 and the second connection 17b of the first resistance circuit 17 form a common circuit node.
- the first connection 25a of the second switch 25 the first connection 20a of the second resistance component 20 and the first connection 18a of the second resistance circuit 18 form a common circuit node.
- the second connection 25b of the second switch 25 is connected to the first connection 19a of the first resistance component 19.
- the second connection 19b of the first Wi- resistance component 19 the second connection 20b of the second resistance component 20 and the second connection 18b of the second resistance circuit 18 form a common circuit node.
- a third capacitor 26 with a first connection 26a and a second connection 26b of the filter device 8 is provided.
- the third capacitor 26 is connected in parallel to the first capacitor 13 and to the second capacitor 15 and in the present exemplary embodiment also to the resistance circuits 17, 18 to the first connection 10 of the filter device 8 and to the second connection 11 of the filter device 8.
- the first connection 10 of the filter device 8, the first connection 13a of the first capacitor 13 and the first connection 26a of the third capacitor 26 form a common circuit node.
- the second connection 11 of the filter device 8, the first connection 15b of the second capacitor 15 and the second connection 26b of the third capacitor 26 form a common circuit node.
- the third capacitor 26 provides a fixed X capacitance.
- the capacitance Ci of the first capacitor 13 is equal to the capacitance C2 of the second capacitor 15.
- the capacitance C3 of the third capacitor 26 is typically larger than the capacitances Ci, C2.
- the resistance value Ri of a respective first resistance component 19 is smaller than the resistance value R2 of a respective second resistance component 20.
- the power converter 1 further shows an intermediate circuit capacitor 40, which is connected between the first line 2 and the second line 4, and a converter circuit 41, which is connected between the first line 2 and the second line 4.
- the filter device 8 is arranged on the side of the intermediate circuit capacitor 40 facing away from the converter circuit 41.
- the power converter 1 also has four inductive filter elements 42, 43, 44, 45, which act as longitudinal inductances in the lines 2, 4 and, for example, through ferrite cores, such as nanocrystalline cores, iron powder cores or other cores made of magnetic material, around the lines 2, 4 are trained.
- the filter elements 42 to 45 are arranged close to the filter device 8.
- the filter elements 42, 44 are arranged on the DC input side with respect to the filter device 8.
- the filter elements 43, 45 are arranged on the intermediate circuit capacitor side with respect to the filter device 8.
- FIG. 1 also shows schematically parasitic inductances Li P , Lin along the first line 2 and the second line 4 between the DC voltage connection 9 and the filter device 8 or the filter elements 42, 44 as well as parasitic inductances L2 P , L2n along the first line 2 or the second line 4 between the filter device 8 or the filter elements 43, 45 and the intermediate circuit capacitor 40.
- the arrangement of the filter device 8 can be chosen so that Li P and Lin are less than L2 P and L2n in order to enable the most efficient filtering possible.
- Fig. 2 is a schematic diagram of the power converter 1 according to the exemplary embodiment.
- the filter device 8 has a circuit board 50 on which the connections 10, 11, 12, the capacitors 13, 15, 26, the resistance circuits 18, 19 and the switching device 21 are arranged.
- the first line 2 and the second line 4 are each formed by solid busbars 51, 52, which are contacted with the connections 10, 11 on the circuit board 50.
- the DC voltage connection 9 designed as a connection device 53 is connected to a first end of the busbars 51, 52.
- the converter circuit 41 is connected to a second end of the busbars 51, 52.
- the intermediate circuit capacitor 40 is also contacted with the busbars 51, 52 and is, based on the length of the busbars 51, closer to the converter circuit 41 than to the filter device 8.
- the third connection 12 of the filter device 8 is not contacted with the busbars 51, 52, but is connected to a housing 55 of the power converter 1 by means of a fastening means 54, which forms the third line 6.
- the reference potential 7 can therefore also be understood as a housing potential.
- the lines 2, 4 or the busbars 51, 52, the filter device 8, the intermediate circuit capacitor 40 and the converter circuit 41 are housed in the housing 55.
- the power converter 1 can be designed as an inverter, DC-DC converter or as an active rectifier.
- the converter circuit 41 has suitable semiconductor switching elements for this purpose.
- FIG. 3 is a circuit diagram of the filter device 8 according to a second exemplary embodiment of a power converter 1.
- the switches 24, 25 form a parallel connection with the respective second resistance component 20.
- the respective first resistance component 19 is connected in series to this parallel connection.
- the first connection 24a of the first switch 24, the first connection 20a of the second resistance component 20 and the first connection 17a of the first resistance circuit 17 form a common circuit node.
- the second connection 24b of the first switch 24, the second connection 20b of the second resistance component 20 and the first connection 19a of the first resistance component 19 form a common same circuit node.
- the second connection 19b of the first resistance component 19 is connected to the second connection 17b of the first resistance circuit 17.
- the first connection 25a of the second switch 25, the first connection 20a of the second resistance component 20 and the first connection 18a of the second resistance circuit 18 form a common circuit node.
- the second connection 25b of the second switch 25, the second connection 20b of the second resistance component 20 and the first connection 19a of the first resistance component 19 form a common circuit node.
- the second connection 19b of the first resistance component 19 is connected to the second connection 18b of the second resistance circuit 18.
- the resistance value Ri of a respective first resistance component 19 is smaller than the resistance value R2 of a respective second resistance component 20 and the switching device 21 is set up to switch the respective switch 24, 25 to assume the first filter mode to switch conductive and blocking to enter the second filter mode.
- FIG. 4 is a circuit diagram of the filter device 8 according to a third exemplary embodiment of a power converter 1.
- the resistance circuit 27 is connected in a circuit branch between the middle node 23 and the third connection 12 of the filter device 8.
- the first connection 27a of the resistance circuit 27 is connected to the third connection 12 and the second connection 27b of the resistance circuit 27 is connected to the middle node 23.
- the first current path 14 is from the first connection 10 via the first capacitor 13, the middle node 23 and the resistance circuit 27 to the third connection 12 and the second current path 16 from the second connection 11 via the middle node 23 and the resistance circuit 27 to the third connection 12.
- the resistance circuit 27 is designed analogously to one of the resistance circuits 17, 18 according to the first exemplary embodiment. This means that in the present third exemplary embodiment, the switch 28 forms a series connection with the first resistance component 19 and the second resistance component 20 is connected in parallel to the series connection of the switch 28 and the first resistance component 19.
- the first connection 28a of the switch 28 the first connection 20a of the second resistance component 20 and the first connection 27a of the resistance circuit 27 form a common circuit node.
- the second connection 28b of the switch 28 is connected to the first connection 19a of the first resistance component 19.
- the second connection 19b of the first resistance component 19 the second connection 20b of the second resistance component 20 and the second connection 27b of the resistance circuit 27 form a common circuit node.
- the second connections 13b, 15b of the capacitors 13, 15 are connected to the middle node 23 or form the middle node 23 with the second connection 27b of the resistance circuit 27.
- the first connection 13a of the first capacitor 13 is connected to the first connection 10 of the filter device 8.
- the first connection 15a of the second capacitor 15 is connected to the second connection 11 of the filter device 8.
- the resistance value Ri of the first resistance component 19 is smaller than the resistance value R2 of the second resistance component 20 and the switching device 21 is set up to do so. to switch the switch 27 on to assume the first filter mode and off to assume the second filter mode.
- the third capacitor 26 is connected in parallel to the first and second capacitors 13, 15.
- the resistance circuit 27 is arranged on the circuit board 50 in the third exemplary embodiment.
- the resistance circuit 27 is designed corresponding to the resistance circuit 17 according to the second exemplary embodiment. This means that the switch 28 forms a parallel connection with the second resistance component 20 and the first resistance component 19 is connected in series to this parallel connection.
- a third resistance circuit 27 according to the third or fourth exemplary embodiment is additionally provided.
- a resistance circuit 17, 18 according to the first exemplary embodiment can also be connected between one of the capacitors 13, 15 and the middle node 23 with a resistance circuit 17, 18 according to the second exemplary embodiment between the other of the capacitors 13, 15 and the middle node can be combined.
- the on-board electrical system 101 has a traction battery 102 with a nominal voltage of, for example, 800 volts, a charging device 103, which can be connected to an electrical network 104 external to the vehicle for charging or discharging the traction battery 102, and a control device 105, which is set up to provide the control information 22 , on.
- the on-board electrical system 101 can be considered a high-voltage on-board electrical system since its operating voltage is regularly above 60 V.
- the vehicle electrical system 101 has a power converter 1 according to one of the previously described exemplary embodiments, which is designed as an inverter.
- the power converter 1 is set up to electrically supply an electrical machine 106 of the vehicle electrical system 101 for driving the vehicle 100 with a multi-phase alternating voltage.
- the electrical machine 106 is, for example, a permanently or electrically excited synchronous machine, an axial flux machine or an asynchronous machine.
- the on-board electrical system 101 has a further power converter 1a according to one of the previously described exemplary embodiments, which is designed as an active rectifier or as a DC-DC converter and forms part of the charging device 103.
- the power converter 1a is set up to convert a direct or alternating voltage provided by the vehicle-external electrical network 104 into a direct voltage for charging the traction battery 102.
- the on-board electrical system 101 has a further power converter 1 b according to one of the previously described exemplary embodiments, which is designed as a DC-DC converter.
- the power converter 1 b is set up to couple the on-board electrical system 101 with another on-board electrical system 107 of the vehicle 100.
- the further on-board electrical system 107 is, for example, a low-voltage on-board electrical system with an operating voltage of less than 60 volts, for example 12 volts, 24 volts or 48 volts.
- the control device 105 communicates with the charging device 103 via a signal line symbolized by a double arrow.
- the control device 105 is set up to provide the power converters 1, 1 a, 1 b with the control information 22 for entering the second filter mode if and as long as the charging device 103 is connected to the vehicle-external electrical network 104.
- the second filter mode can therefore be viewed in particular as a charging mode.
- the control information 22, on the other hand, is provided in particular for entering the first filter mode when the charging device 103 is separated from the vehicle-external electrical network 104 and when the vehicle 100 is driving.
- the first filter mode can therefore also be viewed as a driving mode.
- the on-board electrical system 101 can also have electrical conductors, by means of which the third line 6 (see FIG.
- the vehicle 100 can accordingly be designed as a battery-electric vehicle (BEV) or as a hybrid vehicle.
- BEV battery-electric vehicle
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Power Conversion In General (AREA)
- Inverter Devices (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022120543.6A DE102022120543A1 (de) | 2022-08-15 | 2022-08-15 | Stromrichter für ein Bordnetz eines elektrisch antreibbaren Fahrzeugs und Bordnetz für ein elektrisch antreibbares Fahrzeug |
| PCT/EP2023/068795 WO2024037782A1 (de) | 2022-08-15 | 2023-07-06 | Filter mit y-kondensatoren und veränderbarer dämpfung für 3-leitungs-dc-bordnetz |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4573646A1 true EP4573646A1 (de) | 2025-06-25 |
Family
ID=87418637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23744061.5A Withdrawn EP4573646A1 (de) | 2022-08-15 | 2023-07-06 | Filter mit y-kondensatoren und veränderbarer dämpfung für 3-leitungs-dc-bordnetz |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4573646A1 (de) |
| JP (1) | JP2025526154A (de) |
| DE (1) | DE102022120543A1 (de) |
| WO (1) | WO2024037782A1 (de) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK175067B1 (da) | 2000-12-07 | 2004-05-17 | Danfoss Drives As | RFI-filter til en frekvensomformer samt fremgangsmåde til indkobling af filteret |
| DK174717B1 (da) * | 2002-05-22 | 2003-10-06 | Danfoss Drives As | Motorstyring indeholdende et elektronisk kredsløb til beskyttelse mod inrushstrømme |
| GB2460254B (en) * | 2008-05-22 | 2010-04-07 | Siemens Ag | A poly-phase apparatus |
| DE102017220982A1 (de) | 2017-10-09 | 2019-04-11 | Volkswagen Aktiengesellschaft | Traktionsnetz |
| DE102018208309A1 (de) | 2018-05-25 | 2019-11-28 | Robert Bosch Gmbh | Gleichspannungsfiltervorrichtung und elektrischer Stromrichter |
| US11342861B2 (en) * | 2020-09-30 | 2022-05-24 | Rockwell Automation Technologies, Inc. | Method and apparatus to mitigate DC bus over-voltages on common AC bus systems utilizing DC and AC drives |
| DE102021003180A1 (de) | 2021-06-21 | 2021-08-19 | Daimler Ag | Elektrisches Bordnetz für ein elektrisch betreibbares Fahrzeug und Verfahren zum Betreiben eines elektrischen Bordnetzes |
-
2022
- 2022-08-15 DE DE102022120543.6A patent/DE102022120543A1/de active Pending
-
2023
- 2023-07-06 EP EP23744061.5A patent/EP4573646A1/de not_active Withdrawn
- 2023-07-06 WO PCT/EP2023/068795 patent/WO2024037782A1/de not_active Ceased
- 2023-07-06 JP JP2025508774A patent/JP2025526154A/ja not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE102022120543A1 (de) | 2024-02-15 |
| JP2025526154A (ja) | 2025-08-07 |
| WO2024037782A1 (de) | 2024-02-22 |
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