EP4038735A1 - Convertisseur de puissance bidirectionnel ayant un circuit intermédiaire - Google Patents

Convertisseur de puissance bidirectionnel ayant un circuit intermédiaire

Info

Publication number
EP4038735A1
EP4038735A1 EP20760436.4A EP20760436A EP4038735A1 EP 4038735 A1 EP4038735 A1 EP 4038735A1 EP 20760436 A EP20760436 A EP 20760436A EP 4038735 A1 EP4038735 A1 EP 4038735A1
Authority
EP
European Patent Office
Prior art keywords
converter
output
input
connection
bridge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20760436.4A
Other languages
German (de)
English (en)
Inventor
André Körner
Martin Dierkes
Christian Buhlheller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hella GmbH and Co KGaA
Original Assignee
Hella GmbH and Co KGaA
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 Hella GmbH and Co KGaA filed Critical Hella GmbH and Co KGaA
Publication of EP4038735A1 publication Critical patent/EP4038735A1/fr
Pending legal-status Critical Current

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
    • H02M1/10—Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from ac or dc
    • 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
    • H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
    • H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
    • H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/79—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with 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
    • H02M7/797—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • H02J3/322—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
    • 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
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
    • 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
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • 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
    • H02M7/2173—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 biphase or polyphase circuit arrangement
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/14—Arrangements for reducing ripples from dc input or output
    • H02M1/15—Arrangements for reducing ripples from dc input or output using active elements
    • 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
    • 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
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

Definitions

  • the invention relates to a transformerless converter with a three-phase AC input and output, a first converter stage with a first input and output and a second input and output, an intermediate circuit, a second converter stage with a first input and output and a second Input and output and a direct current input and output, the first input and output of the first converter stage being electrically connected to the three-phase alternating current input and output and the second input and output of the first converter stage being electrically connected to the intermediate circuit, the The first input and output of the second converter stage is electrically connected to the intermediate circuit and the second input and output of the second converter stage is electrically connected to the DC input and output, the first converter stage being a controlled six-pulse bridge circuit made up of controllable converter valves arranged in half-bridges, with the intermediate circuit a capacitor H alb vite, ie having a first capacitor and a second capacitor, the first capacitor connected on the one hand to a first connection of the second input and output of the first converter stage and a first connection of the first input and output of the
  • the invention also relates to - A method for rectifying two-phase current from a two-phase alternating current source with the transformerless converter, the converter being connected to the two-phase alternating current source via a second outer conductor and a third outer conductor connection of the three-phase alternating current input and output, and
  • a direct voltage is generated from a one-, two- or three-phase current, which is fed to the second converter stage via the intermediate circuit.
  • the DC voltage of the intermediate circuit can be set to the voltage that is to be applied to the DC input and output of the converter.
  • Power converters are used in chargers for electric vehicles.
  • known transformerless converters for charging electric vehicles on single-phase AC networks, two-phase AC networks or three-phase AC networks require many power electronic stages, so that chargers for universal use on one, two or three-phase AC networks are expensive.
  • Equalizing currents that could flow into the vehicle due to parasitic discharge capacities of the battery or other components should be suppressed in order not to adversely affect the function of protective devices against electrical hazard.
  • Circuit parts should be used in different functions depending on the operating mode in order to minimize the effort for the charger.
  • the converter has a first half-bridge made of controlled converter valves, which is connected to the first connection and the second connection of the output of the first converter stage and the connection point between the converter valves of the first converter valve half-bridge via a first throttle with the Connection point of the capacitor half-bridge is connected.
  • this first converter valve half bridge the voltage across the first and / or second capacitor of the capacitor half bridge of the intermediate circuit can be regulated. In this way, leakage currents in the vehicle can be avoided when charging with the three-phase rectifier on a single-phase or two-phase AC network.
  • the regulation ensures that the voltage across the first capacitor and the voltage across the second capacitor are the same.
  • the circuit complexity can be reduced if the first converter valve half-bridge is formed by a first of the half-bridges of the controlled six-pulse bridge circuit. It is then not necessary to provide special converter valves only for the purpose of the invention.
  • the existing infrastructure of the controlled six-pulse bridge circuit can be used.
  • the first converter valve half-bridge is formed by a first of the half-bridges of the controlled six-pulse bridge circuit, it is advantageous if the converter has a first switch with which to switch between operation on a three-phase AC source and a source with fewer phases can be switched on.
  • the first switch in a first variant can be a changeover switch, the common center connection of which with the connection point of the first Converter valve half-bridge is connected and which, depending on the switch position, is connected either to the first choke or possibly via a further choke with a first outer conductor connection of the three-phase alternating current input and output.
  • the first switch can also be a changeover switch whose common center connection is connected to the connection point of the first converter valve half-bridge via the first throttle and which, depending on the switch position, either to the connection point of the capacitor half-bridge or to a first external conductor connection of the three-phase -AC input and output is connected.
  • the first switch can be an on / off switch that connects a first outer conductor connection of the three-phase AC input and output to the connection point of the capacitor half-bridge, the first outer conductor connection to the first one via the first choke - and output of the controlled six-pulse bridge circuit is connected.
  • the first switch should be able to establish a conductive connection from the connection point of the first converter valve half-bridge to the first outer conductor connection of the three-phase AC input and output in the event of a supply from a three-phase AC power source, in order to also connect the converter from the to supply the first external conductor connection with current, while the first switch in the case of a supply to a single-phase or two-phase AC source, there is a conductive connection from the connection point of the first converter valve half-bridge via the first choke to the connection point of the capacitor half-bridge, thus with a control of the first Converter stage the converter valves of the first converter valve half-bridge for regulating, in particular keeping a voltage across the second capacitor the capacitor half-bridge can be used.
  • a further improvement in the quality of the current at the DC input and output of the converter when charging on a single-phase AC network can be achieved if the converter has a second half-bridge made up of two controlled converter valves, which are connected to the first connection and the second connection of the second input and output Output of the first converter stage is connected and whose connection point between the two controlled converter valves is connected to the second connection of the second input and output of the first converter stage via a series connection of a second choke and a third capacitor.
  • the second converter valve half-bridge with the third capacitor as a storage capacitor is possible for the second converter valve half-bridge with the third capacitor as a storage capacitor to be operated as an active ripple filter.
  • the converter can be operated not only as a rectifier, but also as an inverter. Operation as a single-phase inverter or as a three-phase inverter is possible in particular.
  • the second converter stage can then be operated as a DC voltage converter, in particular as a step-up converter, which supplies the intermediate circuit with an electrical voltage. This electrical voltage is converted into an alternating voltage by the first converter stage, which is operated as an inverter.
  • the first converter stage that is to say the controlled six-pulse bridge circuit, can be network-controlled or, in particular in isolated operation, self-controlled and thus network-forming. Even in the case of inverter operation, it is necessary both to keep the power factor constant and to prevent leakage currents due to voltage ripples through parasitic capacitances. In single-phase operation, the voltage ripples across the capacitor half-bridge of the intermediate circuit must therefore also be avoided in inverter operation. The voltage ripples can be avoided with the same means as in rectifier operation.
  • the circuit complexity can be reduced if the second converter valve half bridge is formed by a second one of the half bridges of the controlled six-pulse bridge circuit. It is then not necessary to provide special converter valves only for the purpose of the invention.
  • the existing infrastructure of the controlled six-pulse bridge circuit can be used.
  • the second converter valve half-bridge is formed by the second of the half-bridges of the controlled six-pulse bridge circuit, it is advantageous if the converter has a second switch with which between operation on a three- or two-phase alternating current source and a source with one phase can be switched back and forth.
  • the second switch can be a changeover switch, the common center connection of which is connected to the connection point of the second converter valve half-bridge and which, depending on the switch position, either connects to the second choke or, if necessary, via a further choke to a second external conductor connection of the three-phase alternating current and output is connected.
  • the second switch can be a changeover switch, the common center connection of which is connected to the connection point of the second converter valve half-bridge via the second choke and which, depending on the switch position, is either connected to the third capacitor or to a second external conductor connection of the three-phase AC input and output output is connected.
  • the second switch is an on and off switch that connects a second outer conductor connection of the three-phase AC input and output to the third capacitor, the second outer conductor connection to the first one via the second choke - and output of the controlled six-pulse bridge circuit is connected.
  • the second switch should be able to establish a conductive connection from the connection point of the second converter valve half-bridge to the second outer conductor connection of the three-phase AC input and output in the case of a supply to a three- or two-phase AC power source, to the converter also to be supplied with power via the second external conductor connection, while the second switch, in the case of a supply from a single-phase alternating current source, creates a conductive connection from the connection point of the second converter valve half-bridge via the series connection of the second choke and the third capacitor to the second connection of the second one - And output of the first converter stage exists so that the converter valves of the second converter valve half-bridge can be used to regulate a voltage in the intermediate circuit with a control of the first converter stage.
  • the second converter stage can be a direct current converter, in particular a synchronous converter.
  • the second converter stage can comprise at least one converter valve half-bridge made of two converter valves, a first of the two converters on the one hand with the first connection and the second of the two converters on the one hand with the second connection of the first input and output of the second converter stage and both converters on the other hand a connection point between the two converters are connected.
  • the connection point and the second connection of the first input and output can be connected to the second input and output of the second converter stage via a low-pass filter. If the second converter stage has two such converter valve half bridges, the capacitors of the low-pass filters can be combined to form one component.
  • the converter valves used in the invention can be transistors, power transistors, thyristors, IGBTs, FETs, MOS-FETs or the like.
  • FIG. 1 each show a converter with an intermediate circuit with a capacitor half bridge and with a first converter valve half bridge for regulating the voltage at a connection point of the capacitor half bridge and with a second converter valve half bridge for regulating a voltage in the intermediate circuit. It shows:
  • 1a shows a converter in which the first converter valve half bridge and the second converter valve half bridge are formed by converter valves outside a first converter stage and in which the second converter stage is formed by a synchronous converter with a converter valve half bridge,
  • 1 b shows a variant of the converter from FIG. 1 a, in which, in contrast to the converter from FIG. 1 a, the second converter stage is formed by a synchronous converter with two converter valve half bridges
  • 2a shows a converter in which the first converter valve half bridge is formed by a converter valve half bridge of the first converter stage and the second converter valve half bridge is formed by converter valves outside a first converter stage and in which the second converter stage is formed by a synchronous converter with a converter valve half bridge is
  • FIG. 2b shows a variant of the converter from FIG. 2a, in which, in contrast to the converter from FIG. 2a, the second converter stage is formed by a synchronous converter with two converter valve half bridges
  • FIG. 3a shows a converter in which the first converter valve half bridge from Converter valves outside a first converter stage and the second converter valve half bridge are formed by a converter valve half bridge of the first converter stage and in which the second converter stage is formed by a synchronous converter with a converter valve half bridge
  • FIG. 3b shows a variant of the converter from FIG. 3a, in which, in contrast to the converter from FIG. 3a, the second converter stage is formed by a synchronous converter with two converter valve half-bridges the second converter valve half bridge are formed by a converter valve half bridge of the first converter stage and in which the second converter stage is formed by a synchronous converter with a converter valve half bridge,
  • FIG. 4b shows a variant of the converter from FIG. 4a, in which, in contrast to the converter from FIG. 4a, the second converter stage is formed by a synchronous converter with two converter valve half-bridges
  • FIG. 5a shows a variant of the converter from FIG. 4a
  • FIG. 5b shows a variant of the converter from FIG. 4b.
  • the fundamentals for a converter according to the invention will now be explained with reference to the converter from FIG. 1a.
  • the converter according to the invention according to FIG. 1a is a bidirectional three-phase AC rectifier with a three-phase AC input and output L1, L2, L3, N with external conductor connections L1, L2, L3 and a neutral conductor connection N. , a first converter stage 1, an intermediate circuit 3 comprising a capacitor bridge C1, C2, a second converter stage 2 and a direct current output 24, 25.
  • a first input and output of the first converter stage 1 of the converter from FIG. 1a is (like the inputs of the first converter stages 1 of the converter from FIG.
  • a second input and output 13, 14 of the first converter stage 1 is connected to the intermediate circuit 3 (like the outputs 13, 14 of the first converter stages 1 of the converter from FIGS. 1b to 5b).
  • the intermediate circuit of the converter is also connected to the first input and output 21, 22 of the second converter stage 2, the second input and output 23, 24 of which forms the second input and output of the converter.
  • the first converter stage 1 is controlled by a six-pulse bridge circuit in Flalb Hampshiren Q1, Q2; Q3, Q4; Q5, Q6 arranged controllable converter valves Q1, Q2, Q3, Q4, Q5, Q6 formed.
  • a controller for driving the converter valves Q1, Q2, Q3, Q4, Q5, Q6 is preferably provided, but is not shown.
  • Connection points between the converter valves Q1, Q2, Q3, Q4, Q5, Q6 of a half bridge Q1, Q2; Q3, Q4; Q5, Q6 are connected to the outer conductor connections L1, L2, L3 via the first input and output of the first converter stage 1 and choke 11, I2, I3. External connections of the half bridges Q1, Q2; Q3, Q4; Q5, Q6 are connected to the connections 13, 14 of the first converter stage 1.
  • the capacitor half-bridge C1, C2 is on the one hand with the first connection 13 of the second input and output 13, 14 of the first converter stage 1 and the first connection 21 of the first input and output 21, 22 of the second converter stage 2 and on the other hand with the second Connection 14 of the output 13, 14 of the first converter stage 1 and the second connection 22 of the first input and output 21, 22 of the second converter stage 2 are connected.
  • a connection point 31 between the two capacitors C1, C2 is connected to the neutral conductor connection N.
  • a voltage between the connection point 31 of the capacitor half-bridge and the neutral conductor N on the one hand and the second connection 14 of the output of the first converter stage 1 and the second connection 22 of the output of the second converter stage 2 on the other hand is stabilized by the first converter valve half-bridge.
  • the first converter valve half-bridge is formed by converters Q7, Q8.
  • the connection point between the two converters Q7, Q8 is connected to the connection point 31 of the capacitor half-bridge C1, C2 and the neutral conductor connection N via a choke I4.
  • the voltage between the connection point 31 and the first connection 13 of the output 13, 14, which drops across the capacitor C2 can be adjusted.
  • the converter valves Q7, Q8 of the first converter valve half-bridge Q7, Q8 are opened and closed so that the voltage across the first capacitor C1 and the second capacitor C2 is the same, or at least the voltage across C2 is largely constant. This allows leakage currents to be avoided.
  • a voltage drop across the capacitor half-bridge C1, C2, ie at the second input and output 13, 14 of the first converter stage 1 and at the first input and output 21, 22 of the second converter stage 2, can be stabilized by means of an active filter in order to increase voltage ripples avoid.
  • the active filter is formed by the second converter valve half-bridge comprising the converter valves Q9, Q10 and the series connection of the third capacitor C3 and the choke I5.
  • External connections of the converter half-bridge are on the one hand with the first connection 13 of the second input and output 13, 14 of the first converter stage 1 and the first connection 21 of the first input and output 21, 22 of the second converter stage 2 and on the other hand with the second connection 14 of the second input and output 13,
  • a connection point between the two converter valves Q9, Q10 is via the series circuit C3,
  • the second converter stage 2 is formed by a DC voltage converter, namely by a first synchronous converter. Its converter valve half-bridge consisting of two converter valves Q11 and Q12 is connected with its external connections to the first input and output 21, 22 of the second converter stage 2. A connection point between the converter valves Q11 and Q12 and the second connection 22 of the first input and output are connected to the second input and output 23, 24 via a low-pass filter made up of a choke I6 and a capacitor C4.
  • the converter shown in FIG. 2a differs from the converter shown in FIG. 1a in that the first converter valve half-bridge is not formed by components outside the first converter stage 1, but by a first of the converter valve half-bridges Q1, Q2 controlled six-pulse bridge circuit Q1, Q2, Q3, Q4, Q5, Q6, which is connected to the first outer conductor connection L1 of the three-phase AC input and output L1, L2, L3, N in the case of a three-phase supply.
  • the connection point of the converter valve half-bridge Q1, Q2 is not directly connected to the external conductor connection L1 via a choke.
  • the connection point is with a common center connection of a changeover switch S1 connected.
  • a connection to the external conductor connection L1 or, via the choke I4, a connection to the connection point 31 in the capacitor bridge circuit can be established.
  • the converter valves Q1, Q2 can be used for connection to a three-phase power source.
  • the converter valves (with a single-phase or two-phase connection to a power source) can be used to stabilize the voltage between the connection point 31 or the neutral conductor connection N and the second connection 14 of the second input and output 13, 14 of the first converter stage 1 and the second connection 22 of the first input and output 21, 22 of the second converter stage 2 can be used.
  • the converter shown in Fig. 3a differs from the converter shown in Fig. 1a in that the second converter valve bridge is not formed by components outside the first converter stage 1, but a second of the converter valve bridge Q3, Q4 of the controlled Six-pulse bridge circuit Q1, Q2, Q3, Q4, Q5, Q6, which with three-phase supply with the second outer conductor connection L2 of the three-phase AC input and output L1, L2, L3, N.
  • the connection point of the converter valve bridge Q1, Q2 is unlike the converter from FIG. 1a, it is not directly connected to the external conductor connection L2 via a choke.
  • the connection point is connected to a common center connection of a changeover switch S2.
  • the converter valves Q1, Q2 can be used for connection to a three-phase or two-phase power source.
  • C3 When connecting to the series connection 15, C3 the converter valves (with a single-phase connection to a power source) to stabilize the voltage between the first connection 13 of the second input and output 13, 14 of the first converter stage 1 and the first connection 21 of the first input and output Output 21, 22 of the second converter stage 2 and on the other hand the second connection 14 of the second input and output 13, 14 of the first converter stage 1 and the second connection 21 of the first input and output 21, 22 of the second converter stage 2 can be used.
  • both the first converter valve half-bridge Q1, Q2 and the second converter valve half-bridge Q3, Q4 are used to increase the voltage across the capacitor C2 or the Stabilize voltage in intermediate circuit 3.
  • the first converter valve half-bridge Q1, Q2 and the second converter valve half-bridge Q3, Q4 can be connected to the external conductor connections L1, L2 on the one hand or to the choke I4 or the series connection of the choke I5 and the capacitor C3 on the other hand can be connected, as is possible with the converter from FIG. 2a or from FIG. 3a.
  • the converter shown in FIG. 5a differs from the converter shown in FIG. 4a in that the number of components used is further reduced. This is possible because the changeover switches S1, S2 have been replaced by on and off switches S1, S2 and the connection of the switches S1, S2 to the connection points between the converter valves Q1, Q2 or Q3, Q4 has been changed. In the converter from FIG. 5a, these connection points are connected to the switches S1, S2 via the chokes 11, I2.
  • connection point between the converter valves Q1, Q2 via the throttle 11 Neutral conductor connection N or to connection point 31 established.
  • the choke 11 assumes the function of the choke I4 of the converters from FIGS. 1a, 2a, 3a and 4a.
  • the converter valves Q1, Q2 are switched in one- or two-phase alternating current operation in such a way that the voltages on the capacitor C2 of the capacitor bridge C1, C2 are largely constant. This is the case when the current through the inductor 11 is the inverse of the current through the inductor I3.
  • the converter from FIG. 1b differs from the converter from FIG. 1a in that the second converter stage 2 is connected in parallel to the first synchronous converter, which is already provided in the second converter stage of the converter according to FIG. 1a Has synchronous converter.
  • This second synchronous converter has two converter valves Q13, Q14 in a flat bridge arrangement and a choke I6 which is connected to the connection point between the converter valves Q13, Q14 and the capacitor C4, which is used by both synchronous rectifiers.
  • the converters according to FIGS. 2b, 3b, 4b and 5b differ in the same way from the converters shown in FIGS. 2a, 3a, 4a and 5a. List of reference symbols

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)
  • Inverter Devices (AREA)

Abstract

L'invention concerne un convertisseur de puissance comprenant une entrée et une sortie de courant alternatif triphasé (L1, L2, L3, N), un premier étage de convertisseur de puissance (1) ayant une première entrée et une seconde entrée et une seconde entrée et une seconde sortie (13, 14), un circuit intermédiaire (3), un second étage de convertisseur de puissance (2) ayant une première entrée et une première sortie (21, 22) et une seconde entrée et une seconde sortie (23, 24) et une sortie de courant continu (A), la première entrée et la sortie du premier étage de convertisseur de puissance (1) étant électriquement connectée à l'entrée et à la sortie de courant alternatif triphasé (L1, L2, L3, N) et la seconde entrée et la seconde sortie (13, 14) du premier étage de convertisseur de puissance (1) étant électriquement connectées au circuit intermédiaire (3). Des convertisseurs de puissance sont utilisés dans des dispositifs de charge pour véhicules électriques. Les convertisseurs de puissance sans transformateur connus nécessitent actuellement de nombreux étages électroniques de puissance pour charger des véhicules électriques sur des réseaux de courant alternatif monophasé, des grilles à courant alternatif à deux phases et des grilles à courant alternatif triphasé, et, par conséquent, des dispositifs de charge pour une utilisation universelle sur des grilles à courant alternatif à deux ou trois phases sont coûteux. Par conséquent, il existe une demande pour un dispositif de charge économique et compact pour véhicules électriques. Des courants de compensation qui peuvent circuler dans le véhicule en raison des capacités de fuite parasite de la batterie ou d'autres composants doivent être supprimés afin de ne pas influencer négativement la fonctionnalité des dispositifs de protection pour les personnes contre le danger électrique. Des parties de circuit requises pour un fonctionnement en une seule phase et en plusieurs phases doivent être utilisées dans différentes fonctions, en fonction du mode de fonctionnement, afin de réduire au minimum les dépenses pour le dispositif de charge.
EP20760436.4A 2019-10-02 2020-08-19 Convertisseur de puissance bidirectionnel ayant un circuit intermédiaire Pending EP4038735A1 (fr)

Applications Claiming Priority (2)

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DE102019126571 2019-10-02
PCT/EP2020/073216 WO2021063593A1 (fr) 2019-10-02 2020-08-19 Convertisseur de puissance bidirectionnel ayant un circuit intermédiaire

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EP (1) EP4038735A1 (fr)
CN (1) CN114450882A (fr)
WO (1) WO2021063593A1 (fr)

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CN114337334B (zh) * 2021-03-31 2023-10-10 华为数字能源技术有限公司 一种转换器和车载充电器
CN114710015B (zh) * 2022-06-06 2022-10-14 深圳鹏城新能科技有限公司 一种多输出模式逆变器及其控制方法
CN116031988A (zh) * 2022-10-20 2023-04-28 华为数字能源技术有限公司 充电模块、充电设备和充电系统

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EP2160828B1 (fr) * 2007-06-01 2016-05-04 DRS Power & Control Technologies, Inc. Conducteur triphasé effectif sous contrainte à quatre pôles à point neutre avec sortie de tension en mode commun nulle
EP2391521B1 (fr) * 2009-01-29 2020-03-25 Brusa Elektronik AG Convertisseur destiné à une utilisation monophasée et triphasée, alimentation en tension continue et chargeur de pile
EP2479868A1 (fr) * 2011-01-25 2012-07-25 ABB Oy Procédé et appareil pour contrôler les tensions dans des alimentations électriques cc connectées en série
CN112805174A (zh) * 2018-07-25 2021-05-14 沃尔沃卡车集团 电力转换器单元、电力转换装置和包括该电力转换器单元的工业车辆
CN109861357A (zh) * 2018-09-07 2019-06-07 台达电子工业股份有限公司 充放电方法与装置
EP3648322A1 (fr) * 2018-10-30 2020-05-06 Mahle International GmbH Chargeurs embarqués (obc)
CN109889077B (zh) * 2019-04-08 2021-01-26 台达电子企业管理（上海）有限公司 单相和三相兼容的ac/dc电路及充放电装置
CN110460260B (zh) * 2019-08-07 2020-12-15 华为技术有限公司 一种变换器及供电系统

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WO2021063593A1 (fr) 2021-04-08

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