EP4327441A1 - Stromrichterschaltung - Google Patents
StromrichterschaltungInfo
- Publication number
- EP4327441A1 EP4327441A1 EP22717410.9A EP22717410A EP4327441A1 EP 4327441 A1 EP4327441 A1 EP 4327441A1 EP 22717410 A EP22717410 A EP 22717410A EP 4327441 A1 EP4327441 A1 EP 4327441A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit
- resonance
- switchable
- bridge
- compensation
- 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- Withdrawn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
- H02M1/12—Arrangements for reducing harmonics from AC input or output
- H02M1/123—Suppression of common mode voltage or current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33573—Full-bridge at primary side of an isolation transformer
-
- 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
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
- H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
- H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
- H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
- H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Definitions
- Embodiments of the present invention relate to a converter circuit, in particular one with a compensation circuit.
- the power converter circuit can be used, for example, in combination with a motor as the electrical component or a transformer as the electrical component.
- Embodiments of the present invention advantageously enable regenerative common-mode charge reversals.
- common-mode voltages When power electronic circuits are operated, what are known as common-mode voltages occur, which charge parasitic capacitances and thus generate both losses and electromagnetic interference, so-called common-mode currents.
- the object of the present invention is to create a concept that minimizes interference, in particular interference as a result of charge reversal, and at the same time optimizes the overall efficiency of the circuit.
- Embodiments of the present invention provide a power converter circuit with a bridge circuit and a compensation circuit.
- the bridge circuit includes at least one half-bridge, the bridge circuit being connected to another electrical component, such as an electric motor or a transformer.
- the further electrical component has one or more parasitic capacitances.
- the compensation circuit is connected in parallel to an arrangement made up of a bridge circuit and the further electrical component and has one or more resonance paths connected in parallel. Each resonance path has a switchable element.
- each of the one or more parallel-connected resonance paths is coupled via a resonant inductance to an associated compensation capacitance of the one or more compensation capacitances.
- Exemplary embodiments of the present invention are based on the finding that the energy stored in the parasitic capacitances can be recovered by a compensation circuit with a resonance path that includes one or more switchable elements, an inductance and a capacitance. If you consider a power converter circuit with a bridge circuit and another component as the main application, the parasitic capacitances are typically found in the connected component.
- the connected component can be, for example, a transformer with the capacitances between the primary and secondary sides, or an electric motor, which also has significant parasitic capacitances.
- the functionality of the actual circuit is not adversely affected by the proposed circuit topology including the compensation circuit.
- the compensation circuit present here has a decisive advantage, namely that the energy flows back and forth between the parasitic capacitances and the compensation capacitors of the compensation circuit.
- the resonant inductances allow resonant charge reversal, in which only the line losses are lost, but the energy stored in the capacitances is recovered.
- the electrical component can be an electric motor.
- the compensation circuit can be coupled to a protective conductor (PE) or protective earth or the motor housing or the body on one side of the compensation circuit. The coupling can take place, for example, via the compensation capacitor/capacitance already defined above.
- the compensation circuit can have a common contact point of the arrangement, the bridge circuit itself, a center tap of an intermediate circuit of the bridge circuit or a first or second pole of a DC voltage source or a DC voltage connection which is coupled to the bridge circuit. This then implements the parallel connection of the compensation circuit to the arrangement.
- the electrical component can be a transformer.
- the compensation circuit can then be connected in parallel here in that the compensation circuit is connected on one side to the primary side and on the other side to the secondary side of the transformer.
- this can be designed here with a half-bridge, that is, for example, single-phase, but according to further exemplary embodiments, several half-bridges, such as three half-bridges, e.g. B. for a three-phase control of an electric motor or a three-phase grid connection would be conceivable.
- the compensation circuit has three resonance paths.
- each resonance path is coupled to the arrangement via its own compensation capacitance.
- the compensation circuit has at least three compensation capacitances, which are each coupled to one of the three resonance paths on one side.
- these can have a common contact point with the arrangement, e.g. B. with the protective conductor mentioned above or one side of the transformer tor be coupled.
- the number of resonance paths can depend on the topology of the bridge circuit and/or can depend on the control of the half-bridges of the bridge circuit.
- the power converter circuit has a controller which is designed to control the switchable element in the one or more resonance paths in each case in such a way that the switchable element before switching over the respective associated half-bridge is activated.
- the switchable element is activated over a period of time in such a way that resonant charge reversal takes place in equal parts before and after the switching process of the respective associated half-bridge.
- the switchable element of the resonance paths is formed, for example, by two switchable elements connected in series for each resonance path.
- the two switchable elements connected in series can have opposite flow directions.
- a switchable element with two selective blocking directions it would be conceivable for a switchable element with two selective blocking directions to be used.
- the resonance recharging to be started by switching on the respective switchable element of the two series-connected switchable elements of a respective resonance path, which in the present operating state picks up a voltage, is switched on, and after Completion of the resonance charge is switched off again.
- this has one or more half-bridges, with each half-bridge having at least two further switchable elements, for example. These further half-bridges are driven in accordance with preferred exemplary embodiments, as indicated above.
- the components of the resonant path are also adapted to the other switchable elements.
- the switchable elements and the resonance paths and the further switchable elements of the bridge circuit have a comparable size in relation to their switching times.
- comparable means that the switching time is the same, for example, or deviates by a maximum of a specific range.
- the ratio should be 1:1 or a maximum of 1:2 or 2:1 or a maximum of 3:1 or 1:3.
- the switching time of the switchable elements can be twice or half that of the other switchable elements or can generally be in the range between 0.5 and 2.0 or 0.3 and 3.
- the size of the compensation capacitances is adapted to the parasitic capacitances.
- the compensation capacitances essentially correspond to the parasitic capacitances.
- essentially means in a range from 0.5 to 2.0 or in a range from 0.3 to 3
- Example between 0.7 and 1.3 times or 0.9 and 1.1 times times, are set, it being clear to the person skilled in the art that the narrower the limit, the better the compensation behavior will be developed. The corresponding dependencies between the values are explained below using a calculation example.
- a further exemplary embodiment provides a method for driving the power converter circuit, as explained above.
- the switchable elements in the resonant path are activated shortly before switching over a half-bridge of the bridge circuit.
- the activation takes place over a period of time, so that a resonant charge reversal can take place in equal parts before and after the switching process of the respective half-bridge.
- the control is carried out in such a way that a resonance charge reversal is designed in that the respective switchable element of the two series-connected switchable elements of a resonance path is switched, which absorbs a voltage in the present operating state, the same being switched off after the resonance charge reversal .
- the controller can be computer-implemented.
- control algorithms can be stored on a memory chip, for example, so that they can be executed using a processor.
- FIG. 1 shows a schematic representation of a power converter circuit with a compensation circuit according to a basic exemplary embodiment
- FIG. 2a shows a schematic representation of a converter circuit with a connected component, in which losses occur as a result of parasitic capacitances, to explain exemplary embodiments
- 2b shows a schematic representation of a topology according to the prior art for explaining disadvantages in the prior art
- 3 shows a schematic representation of a power converter circuit with a compensation circuit according to extended exemplary embodiments for the application area of an electric motor
- Fig. 4 is a schematic representation of a power converter circuit according to other extended exemplary embodiments for the field of application Transforma tor.
- Fig. 1 shows a converter circuit 10 with a bridge circuit 20, which together with an electrical component 28, z. B. an electric motor coupled. Furthermore, the power converter circuit 10 includes a compensation circuit 30. The compensation circuit 30 is coupled to the arrangement comprising the bridge circuit 20 and the electrical component 28 .
- connection between the compensation circuit 30 and the arrangement made up of the elements 20 and 30 can be made, for example, in such a way that a common protective conductor 24 is connected to the compensation circuit.
- connection is made, for example, via an intermediate tap of a half-bridge 22a of bridge circuit 20 Electric motor are made available.
- the AC voltage is provided by the half-bridge 22a, starting from a DC voltage present at the two voltage taps 21+ and 21- on the bridge circuit 20.
- the compensation circuit 30 includes a resonance path 31.
- the resonance path 31 is connected via a coupling capacitance 38 to the arrangement comprising the elements 20 and 28.
- the resonance path comprises at least one switchable element 32 and a resonant inductance 36.
- the switchable element 32 can be two series-connected switchable elements which, for example, can be switched. B. have an opposite blocking direction. Alternatively, a switchable element with two reverse directions and two forward directions can also be used.
- a resonant charge reversal e.g. B. the charges on the capacitor 38a.
- the bridge circuit 20 can also have additional half-bridges, as is illustrated here with reference to the half-bridge 22b.
- Both half bridges 22a and 22b are arranged between the voltage taps 21+ and 21 ⁇ and can be connected to the electrical component 28 via their center tap, for example.
- This is a typical topology for coupling or decoupling an AC voltage, with other topologies of course other couplings of the electrical component 28's, z. B. via the DC terminals 21 + and 21 - would be possible.
- the compensation circuit 30 is coupled via a common contact point 39 which is connected to the protective conductor 24 here.
- the protective conductor 24 carries, for example, the housing potential and, assuming an electric vehicle, the body potential.
- a coupling of the common contact point 39 to the arrangement or the electrical component 28 is also conceivable.
- the compensation circuit 30 is connected in parallel with the arrangement comprising the elements 20 and 28 .
- the bridge circuit 20 has an intermediate circuit 24 with intermediate circuit capacitors 24k1 and 24k2, the second side of the compensation circuit or here the second side of the resonance path 31a being coupled to an intermediate tap of the intermediate circuit 24.
- the compensation circuit 30 is connected on one side to the intermediate circuit 24 or the converter circuit 20 and on the other side with the protective conductor 24 or the component 28, the compensation circuit 30 is connected with respect to the arrangement comprising the components 20 and 28 in parallel.
- the first side of the compensation circuit 30 cannot be coupled via the intermediate circuit 24, but rather directly via the voltage tap 21+ or 21 ⁇ . All couplings have in common that the compensation circuit 30 is connected to a first side with the bridge circuit 20, while a second side is connected to component 28. Connected here means electrically coupled, directly electrically contacted or galvanically coupled.
- the compensation circuit 30 can also have further resonance paths, here using the example of the resonance path 31b.
- the resonance path 31b is connected to the common contact point 39 via the further compensation capacitance 38b.
- This contact point 39 is arranged on the second side.
- a common contact point 37 can also be present on the first side of the compensation circuit 30, which is connected to the optional intermediate circuit 24 in this exemplary embodiment.
- Fig. 2a shows an inverter 20 with three half-bridges 20a-20c, each having two switchable elements 22a and 22b.
- Each switchable element is connected in parallel with a diode, the reverse direction of the diode being arranged in the opposite direction to the reverse direction of the switchable element.
- the two switchable elements 22a and 22b have, for example, the same blocking direction.
- the common potential taps are here 21 + and 21 - designed so that the three Half-bridges 20a-20c are arranged in between.
- the inverter has an intermediate circuit capacitor 24 which is arranged between the two potential taps 21+ and 21 ⁇ .
- each of the two potential taps 21 + and 21 - can be coupled to a protective conductor 24 via a further capacitor 25 , for example.
- the capacitors are called Y-capacitors 25, for example.
- the inverter 20 is connected between a battery 15 on the DC side and a motor 28 on the AC side.
- the motor 28 is coupled to the intermediate taps of the half-bridges 20a-20c, for example.
- the intermediate taps are associated with reference numerals 26a-26c.
- the connection is made, for example, via a shielded cable 27 comprising the components 27a-27d, with 27a, 27b and 27c being assigned to the intermediate taps 26a, 26b and 26c, while 27d is used for the PE conductor 24. 24 or 27d is connected to the engine mass of the engine 28.
- the motor has motor inductances, for example, as shown here.
- the battery is connected to the cable 16, here a three-wire cable for the voltage taps 21+ and 21- and the protective conductor 24. All elements such as B. the shielded cable 27, the motor 28 form parasitic capacitances, the parasitic capacitances are particularly problematic where due to potential changes (AC voltage or common mode), it can lead to a current flow.
- the parasitic capacitances 28p1 in the area of the cable and between the wires 27a or 27b or 27c and the wire 27d and 28p2 between the individual motor phases and the housing are shown here as an example on the motor 28 side.
- the three half-bridges 20a-20c switch the voltage and thus charge the parasitic capacities 28p1 and 28p2 of cable 27 and motor 28 against the stator with losses.
- the resulting current should be closed within the converter to avoid common mode interference in the battery.
- Fig. 2b shows the arrangement of battery 15, battery cable 16, inverter 20, Motorka bel 27 and motor 28.
- a second converter 40 can be coupled to the converter 20 who the.
- the second converter 40 is constructed, for example, similarly or identically to the converter 20, with its voltage taps 40+ and 40- for the DC voltage (between which the half-bridges 20a-20c are arranged) connected to the corresponding voltage taps 21+ and 21-.
- the half-bridges 20a-20c are each connected via their intermediate circuit using a capacitor arrangement 42 to the protective conductor 24.
- a common potential point 44 is used here.
- the capacity arrangement 42 includes, for example, a dedicated capacitor 42a-42c for each intermediate circuit tap. This means that the three capacitors 42a, 42b and 42c are connected in parallel and are each connected to an intermediate tap of the half-bridges 20a-20c on one side, while they are connected to the common potential point on the second side.
- the inverter 40 By using the inverter 40, anti-phase biasing can be induced at the potential point 44 to minimize the interference.
- the second converter 40 is controlled in an inverted manner with the same control signals and thus recharges the compensation capacitors 42a-42c. An optimization of this arrangement 40 is explained below with reference to FIG. Here there is one of the compensation circuit 50 formed by resonance paths 31a, 31b and 31c.
- FIG. 3 shows the converter circuit 10' with the bridge circuit 20, which is arranged between the motor 28 and the battery 15. Cables 16 and 27 are again used.
- the bridge circuit 20 here in turn has three half-bridges 20a-20c, which are coupled between the potential taps 21+ and 21-.
- an intermediate circuit 24 comprising the series-connected intermediate circuit capacitors 24k1 and 24k2 is also provided.
- the arrangement of the bridge circuit 20 and the motor 28 is connected in parallel.
- the compensation circuit 50 on the one hand, z. B. via a common potential point 39, connected to the protective conductor 24 and on the other side, z. B. via an intermediate tap of the intermediate circuit 24 (i.e. between the capacitors 24k1 and 24k2), with the bridge circuit 20.
- Connected in parallel therefore means that the compensation circuit 50 is coupled on one side to a common potential point of the electrical component 28 and on the other side with a common potential point 37 (intermediate tap of the intermediate circuit 24) with the bridge circuit 20.
- the compensation circuit 50 has three resonance paths 31a, 31b and 31c. These three are all connected in parallel, that is, on their first Side connected to the common contact point 37 and connected on the other side via a capacitor array 42 to the common contact point 39.
- the capacity arrangement 42 includes a separate capacity 42a, 42b and 42c for each resonance path 31a, 31b and 31c. These capacitors 42a, 42b and 42c are approximately as large as the parasitic capacitances 28p1 and 28p2, for example. As shown above, there are three parasitic 28p1 capacitances and three parasitic 28p2 capacitances, namely between a phase connection of the motor or a motor inductance assigned to a phase and the protective conductor 24.
- Each compensation capacitance 42a, 42b and 42c can therefore be adapted to the individual parasitic capacitances 28p1 and 28p2 per phase, in which case the entirety of the capacitances 42a, 42b and 42c corresponds to the total of the entirety of the capacitances 28p1 and 28p2.
- the same order of magnitude means that the criterion still applies if there is a maximum deviation from one capacity to the other capacity, e.g. B. a maximum of 3 times or a third or z. B. a maximum of 0.5 times or 2 times.
- this criterion means that the compensation capacitances 42a, 42b and 42c, individually or in total, correspond to 0.3 to 3.0 times or 0.5 to 2.0 times or the 0.9 to 1.1 times the parasitic capacitances 28p1 and 28p2.
- the resonance path 21a comprises a switchable element 32, which in this exemplary embodiment is formed by two switchable elements 32a and 32b. These two switchable elements can be semiconductor transistors, for example, which have an opposite forward direction or an opposite blocking direction. Each of these semiconductor transistors of the switchable elements 32a and 32b is bridged by a correspondingly oppositely arranged diode.
- An inductance 36 is arranged in series with the switchable element 32 in the resonance path 31a. In this exemplary embodiment, this is provided between the switchable element 32 and the compensation capacitance 42a. If the capacitors 42a-42c are recharged in phase opposition to the motor capacitances 28p2 or general parasitic capacitances 28p1 and 28p2, the currents in the converter close and do not become effective as disturbances.
- compensation capacitors 42a, 42b and 42c can be selected in a wide range of capacitances, which can vary from slightly smaller than the parasitic capacitances to larger. With larger capacitances, the dielectric strength of the semiconductors for the switchable elements is somewhat lower. With smaller capacitances, the values of the resonant inductances are larger. In this respect, the capacity 42a (or 42b or 42c) is dimensioned together with the inductance 36 and the switchable elements 32 in the compensation circuit 50 . A sizing example is given below.
- the switchable elements 32 are preferably selected taking into account the switchable elements of the half-bridges 21a, 21b and 21c.
- the switching speed of the half-bridges 21a, 21b and 21c should roughly correspond to the resonant frequency of the compensation network. Roughly the same again means the same order of magnitude, which means that switching speeds of the element 32 should be between 0.3 and 3 times or 0.5 and 2 times or 0.9 and 1.1 times the resonant frequency of the resonance path or the inductance 36 or the inductance 32 in combination with the parasitic capacitances and capacitances would be conceivable. In other words, this means that the resonant frequency is essentially dependent on the inductance 36 and the parasitic capacitance. In accordance with exemplary embodiments, the resonant element 36 can therefore be dimensioned in relation to the parasitic capacitance.
- the inductance 36 would then be designed with 1 pH.
- switchable elements 32 it should be noted that, as shown here, these can consist of two individual switchable elements 32a and 32b, which are connected in series. This arrangement allows locking in both directions. Alternatively, a switchable element with two blocking directions or two passage directions would also be conceivable, with blocking in both directions again being possible.
- the switchable elements 32 are activated in such a way that this (ideally) takes place shortly before the switching of the half-bridges 21a-21c (depending on the assignment), with the time (activation time) being selected in accordance with further exemplary embodiments in such a way that the Resonance recharging takes place in equal parts before and after the switching process.
- the resonant charge reversal is started in that the switchable element 32a or 32b of the two series-connected elements 32, which absorbs voltage in the present operating state, is switched on. This is then switched on and switched off after completion of the resonant charge. A current reversal is prevented by the freewheeling diode of the other switchable element 32b or 32a.
- damping resistors can be provided for vibrations that occur, in order to shield the system from reality. A possible arrangement of these damping resistors would be in the Y-capacitors, which are provided with the reference numeral 25 (see also the explanation in FIG. 2a).
- the resonant circuit 50 is used at the center point tap 37 of the intermediate circuit 24 .
- coupling to DC+ and DC- that is, to the voltage taps 21+ and 21-, would also be conceivable.
- the control explained above can take place by means of suitable pulse patterns.
- a suitable pulse pattern it is possible to reduce the number of resonant circuits (here three, e.g. to two).
- the number of resonant circuits 31a-31c can correspond, for example, to the number of half-bridges 20a-20c, with more or fewer resonant circuits obviously also being possible, which are then optimized by appropriate controls.
- the compensation circuit 50 is illustrated only schematically here, it being possible to assume that the structure is comparable to the structure from FIG. 3 .
- FIG. 4 shows a further converter circuit with a first area 17, a second area 20' and a coupled component 28'.
- the circuit area 17 represents, for example, an ACDC or DCAC converter which, starting from a three-phase AC voltage (cf. phases P1, P2 and P2), provides a direct voltage V+ and V ⁇ or vice versa, starting from the direct voltage V+ and V ⁇ provides an AC voltage on the three phases P1-P3.
- the second circuit area 20' is a bridge circuit which is coupled to a transformer 28' or two transformers T1 and T2.
- the transformers are provided with the reference symbols T1 and T2 and have, for example, a primary side P1 and a secondary side P2.
- the exact explanation of the circuit is shown in DE 10 2018 210579, for example.
- the resonant circuit 50 is connected in parallel with the arrangement consisting of the elements 28' and 20'.
- the compensation circuit 50 can be connected to the primary side on one side and to the secondary side of the transformers T1 and T2 on the other side.
- a connection on the primary side can take place, for example, at the two poles of C1 and C2, as illustrated here using the two connecting lines.
- the secondary side P2 is then connected to the other side of the compensation circuit 50.
- the compensation circuit 50 it should be noted once again that it can be constructed similarly to the compensation circuit 50 from FIG. This is preferably connected in series, as has already been explained above.
- the size of the device 50 can be significantly reduced in advance with the compensation scarf by the electrical energy in the parasitic capacitances, especially in the parasitic capacitances of the transformers T1 and T2, can be recovered.
- the principle is as explained above.
- the compensation path is now connected in parallel.
- the electric motor is connected to the body, e.g. B. on its housing.
- the compensation circuit is also connected via the common contact point 39 to the car body or car body mass or ground or the protective conductor.
- the electric motor is driven via the bridge circuit.
- the compensation circuit is in turn connected to the bridge circuit, e.g. B. via an intermediate circuit, so that the parallel connection of the compensation circuit results in the arrangement of the motor and bridge circuit.
- the compensation device can have a controller which carries out a corresponding actuation.
- the main features of the control were outlined above.
- the control can be implemented partially in hardware and partially in software.
- exemplary embodiments of the present invention can be implemented as a computer program product with a program code, with the program code being effective to carry out one of the methods when the computer program product runs on a computer.
- the program code can also be stored on a machine-readable carrier, for example.
- exemplary embodiments include the computer program for performing one of the methods described herein, the computer program being stored on a machine-readable medium.
- an exemplary embodiment of the method according to the invention is therefore a computer program that has a program code for performing one of the methods described herein when the computer program runs on a computer.
- a further exemplary embodiment of the method according to the invention is therefore a data carrier (or a digital storage medium or a computer-readable medium) on which the computer program for carrying out one of the methods described herein is recorded.
- the data carrier, digital storage medium, or computer-readable medium is typically tangible and/or non-transitory.
- a further exemplary embodiment of the method according to the invention is therefore a data stream or a sequence of signals which represents the computer program for carrying out one of the methods described herein.
- the data stream or sequence of signals may be configured to be transmitted over a data communications link, such as the Internet.
- a processing device such as a computer or programmable logic device, configured or adapted to perform any of the methods described herein.
- Another embodiment includes a computer on which the computer program for performing one of the methods described herein is installed.
- a further exemplary embodiment according to the invention comprises an apparatus or a system which is designed to transmit a computer program for carrying out at least one of the methods described herein to a recipient.
- the transmission can take place electronically or optically, for example.
- the recipient may be a computer, mobile device, storage device, or similar device.
- the device or the system can, for example, comprise a file server for transmission of the computer program to the recipient.
- a programmable logic device e.g., a field programmable gate array, an FPGA
- a field programmable gate array may cooperate with a microprocessor to perform any of the methods described herein.
- the methods are performed on the part of any hardware device. This can be universal hardware such as a computer processor (CPU) or hardware specific to the process, such as an ASIC.
- the devices described herein may be implemented, for example, using hardware apparatus, or using a computer, or using a combination of hardware apparatus and a computer.
- the devices described herein, or any components of the devices described herein may be implemented at least partially in hardware and/or in software (computer program).
- the methods described herein may be implemented, for example, using hardware apparatus, or using a computer, or using a combination of hardware apparatus and a computer.
- the methods described herein, or any components of the methods described herein, may be performed at least in part by hardware and/or by software.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021203875.1A DE102021203875A1 (de) | 2021-04-19 | 2021-04-19 | Stromrichterschaltung |
| PCT/EP2022/059849 WO2022223386A1 (de) | 2021-04-19 | 2022-04-13 | Stromrichterschaltung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4327441A1 true EP4327441A1 (de) | 2024-02-28 |
Family
ID=81327077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22717410.9A Withdrawn EP4327441A1 (de) | 2021-04-19 | 2022-04-13 | Stromrichterschaltung |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4327441A1 (de) |
| DE (1) | DE102021203875A1 (de) |
| WO (1) | WO2022223386A1 (de) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3254971B2 (ja) | 1995-07-20 | 2002-02-12 | 三菱電機株式会社 | インバータを用いたモータ駆動装置 |
| DE10327598A1 (de) * | 2003-06-18 | 2005-01-20 | Siemens Ag | Umrichter mit integrierten Filter |
| JP5203737B2 (ja) | 2008-02-07 | 2013-06-05 | 株式会社日本自動車部品総合研究所 | 車両駆動装置 |
| CH704553B1 (de) * | 2011-02-21 | 2016-06-15 | Eth Zürich Eth Transfer | Hybrider dreiphasiger AC/DC-Konverter und Verfahren zu dessen Steuerung. |
| CN203103959U (zh) * | 2013-03-27 | 2013-07-31 | 深圳市合兴加能科技有限公司 | 适用于滞环控制的三相电能回馈装置以及交流传动系统 |
| CN204244065U (zh) * | 2014-12-04 | 2015-04-01 | 阳光电源股份有限公司 | 滤波电路及三相逆变器 |
| US10581337B2 (en) * | 2015-07-21 | 2020-03-03 | Mitsubishi Electric Corporation | Power converter |
| DE102015225095A1 (de) * | 2015-12-14 | 2017-06-14 | Robert Bosch Gmbh | Spannungsumrichter, elektrisches Antriebssystem und Verfahren zum Reduzieren von Störspannungen |
| DE102017220109A1 (de) | 2017-11-10 | 2019-05-16 | Lenze Automation Gmbh | Stromrichter |
| DE102018210579A1 (de) | 2018-06-28 | 2020-01-02 | Continental Automotive Gmbh | Fahrzeugseitige Ladeschaltung |
| DE102019204695A1 (de) | 2019-04-02 | 2020-10-08 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Kompensationsschaltung für störströme |
-
2021
- 2021-04-19 DE DE102021203875.1A patent/DE102021203875A1/de not_active Ceased
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2022
- 2022-04-13 EP EP22717410.9A patent/EP4327441A1/de not_active Withdrawn
- 2022-04-13 WO PCT/EP2022/059849 patent/WO2022223386A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022223386A1 (de) | 2022-10-27 |
| DE102021203875A1 (de) | 2022-10-20 |
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