31 results about "Dc ac converter" patented technology

An onboard charging system for an electric vehicle includes a charging port configured to receive a single-phase AC power, a power outlet configured to provide the single-phase AC power to one or more external devices, a single-phase inverter connected to the power outlet and configured to provide power splitting functionality, a DC battery selectively coupled to the charging port, a bidirectional inverter configured to convert AC power to DC power and to convert DC power to AC power, the bidirectional inverter is selectively coupled to the battery, an electric motor coupled to the bidirectional inverter and selectively coupled to the charging port, a DC-AC converter selectively coupled to the electric motor and selectively coupled to the power outlet, and a DC-DC converter coupled to the DC-AC converter and selectively coupled to the battery.

A battery charging system for an electric vehicle including a dual use direct current to direct current converter including a direct current to alternating current converter and a transformer for generating a rotor winding current in response to a first direct current in a propulsion mode and for generating a charging current in response to a charging mode.

An electric propulsion system for an aircraft, comprising: - an electrical power source (1) including a synchronous generator (11) driven by a heat engine (12), - a first synchronous electric motor (3) connected to an output of the synchronous generator by an alternating current electrical circuit (2), - a rotating propulsion unit (7), characterized in that it comprises: - a direct current electrical circuit (4) comprising, from an input connected to the alternating current electrical circuit: a first alternating / direct current converter (41), a direct current electrical link (42) and a second direct / alternating converter (43), - a second electric motor (5) connected to an output of the direct / alternating converter, - a differential gear train (6) including a first input shaft (61) connected to the first synchronous electric motor,a second input shaft (62) connected to the second electric motor and an output shaft (63) connected to the rotating propulsion unit. Figure for the abbreviation: Figure 1,

A DC:DC converter includes: a DC:AC converter circuit having DC and AC sides; an AC:DC converter circuit having DC and sides; an AC link connecting the AC side of the DC:AC circuit and the AC side of the AC:DC converter circuit, the AC link including a transformer having a first winding connected to the AC side of the DC:AC converter circuit and a second winding connected to the AC side of the AC:DC converter; a capacitor; and a switch arrangement having a first state and a second state, wherein: in the first state, the capacitor is connected in series between the AC side of the DC:AC converter circuit and the first winding of the transformer; and in the second state, there is a current path between the AC side of the DC:AC converter circuit and the first winding of the transformer that does not include the capacitor.

A vehicle's power output architecture includes a power source and a DC-AC converter coupled to the power source. The DC-AC converter contains several switches and a first capacitor and a second capacitor, which are operationally coupled to the switches.

A an estimation arithmetic processing unit estimates an open circuit voltage and an internal resistance with respect to a charging rate of the secondary battery based on a charge-discharge voltage and a charge-discharge current of the secondary battery, and input-output power of the DC-AC converter, estimates efficiency of the DC-AC converter and power consumption of an auxiliary device of the DC-AC converter, and estimates charge-discharge energy efficiency with respect to the charging rate of the secondary battery and a rated input-output ratio on an AC side of the DC-AC converter based on the estimated open circuit voltage, the internal resistance, the efficiency of the DC-AC converter, and the power consumption of the auxiliary device of the DC-AC converter.

The invention discloses a thermal mass energy storage system power grading adjustment method based on virtual asynchronous machine control, and belongs to the technical field of thermal mass energy storage systems, and the method comprises the steps: converting the alternating current output by a power grid side into direct current in the process of injecting power into a thermal mass energy storage system by the power grid side based on a virtual asynchronous machine control method; according to the direct current-alternating current converter control method based on the V / f control strategy, power frequency alternating current of a power grid is improved to high-frequency alternating current so as to be matched with power pulsation of a heat storage device side; electric energy of high-frequency alternating current is converted into heat energy to be stored by a heat and mass energy storage system based on Rankine cycle; different heat capacity intervals are divided for the current heat mass energy storage working medium temperature according to the heat mass energy storage device, the virtual inertia coefficient of the virtual asynchronous machine is adjusted, an adjustment instruction is output based on the electric power level, and the power injected or released into the heat mass energy storage system is dynamically adjusted. According to the method, power dynamic balance and frequency support between the power grid and the Rankine cycle heat and mass energy storage system are realized.

A converter arrangement (1) for transmitting electrical power between a phase of a three-phase or multi-phase electrical network (4) and a DC bus (5) is described. The invention relates to a DC / AC converter (2), which can be connected to an electrical network (4) via a sine filter (7) and to a DC bus (5) via a DC-side separate intermediate circuit, a converter bridge (8) of the DC / AC converter (2) being connected to a midpoint (M) of the intermediate circuit; and a rectifier (3) connected in parallel with the DC / AC converter (2). The DC / AC converter (2) has a control device (10) which is designed to operate the DC / AC converter (2) in an overmodulation if the voltage value of the DC bus (5) is lower than twice the amplitude of one of the phase voltages of the network (4).

The invention relates to a hybrid electric propulsion system (200) for a turbojet engine, comprising:-a first permanent magnet synchronous motor (230) connected to a DC-AC converter (231) and intended to be connected to a high-pressure shaft (222) of the turbojet engine; -a hybrid excitation generator (240) comprising a brushless synchronous motor (242), a second permanent magnet synchronous motor (241) connected in series with said brushless synchronous motor, and a bridge rectifier (243) connected to said brushless synchronous motor, said hybrid excitation generator being intended to be connected to a low-pressure shaft (212) of a turbojet engine, and the brushless synchronous motor comprises a generator (3421), an exciter (3422), a rotating diode placed between the generator and the exciter, and a DC-DC converter (244) connected to the exciter; -an energy storage system (250); and-a DC power supply network connected to the DC-AC converter and to the bridge rectifier.

An uninterruptible power supply apparatus includes an AC / DC converter that converts AC power supplied from a commercial AC power supply into DC power and supplies the DC power to a DC line, a DC / AC converter that converts the DC power received from the DC line into AC power and supplies the AC power to a load, a DC / DC converter that provides and receives DC power between the DC line and a battery, and a bidirectional converter that, in high-speed charging of the battery, operates in cooperation with the AC / DC converter, converts the AC power supplied from the commercial AC power supply into DC power, and supplies the DC power to the DC line. This can prevent a shortage of DC power during a high-speed charging operation and enables high-speed charging of the battery while supplying rated power to the load.

An outlet power architecture for a vehicle includes a power source and a direct current to alternating current (DC-AC) converter coupled to the power source. The DC-AC converter includes a plurality of switches and a first capacitor and a second capacitor operably coupled to the plurality of switches.

The invention discloses an equalization system and equalization equipment thereof. A battery equalization master control module in the equipment obtains battery voltage in an energy storage system and determines target equalization voltage according to the battery voltage. The battery equalization control units are in one-to-one correspondence and connection with the battery plug-in boxes of the energy storage system, are also connected with the battery equalization master control module, and collect real-time voltages of the corresponding battery plug-in boxes; the DC-AC converters are connected with the battery equalization control units in a one-to-one correspondence manner and are also connected with the corresponding battery subracks, and the AC ends of the DC-AC converters are connected with an AC power supply; the battery equalization master control module obtains an equalization strategy of each battery plug-in box according to the target equalization voltage and each real-time voltage, equalizes each battery plug-in box, realizes the equalization operation of each battery plug-in box in the energy storage system, cooperates with each battery equalization control unit, automatically and accurately equalizes the batteries in the battery plug-in boxes, and improves the battery equalization efficiency. The equalization reliability is improved and the maintenance difficulty is reduced; synchronous equalization is carried out on a plurality of battery subracks, and equalization efficiency is improved.

A substrate processing system includes a substrate support and a power supply circuit. The substrate support is configured to support a substrate, wherein the substrate support comprises one or more heating elements. The power supply circuit includes: a direct current-to-alternating current converter configured to convert a first direct current voltage to a first alternating current voltage, where the direct current-to-alternating current converter comprises at least one switch; and an isolation circuit comprising one of a coupled inductor or a transformer. The one of the coupled inductor or the transformer is configured to convert the first alternating current voltage to and second alternating current voltage and isolate the one or more heating elements from an earth ground. The power supply circuit is configured to provide an output voltage to the one or more heating elements based on the second alternating current voltage.

An apparatus including a first AC-to-DC converter, a first DC-to-AC converter and a second AC-to-DC converter, the first AC-to-DC converter connected with a low voltage arm of a high voltage divider to obtain a voltage measurement signal, the first DC-to-AC converter configured to output a modulated signal of the voltage measurement signal, the second AC-to-DC converter configured to output a demodulated signal of the voltage measurement signal; a high-frequency transformer including a primary coil connected with an output terminal end of the first DC-to-AC converter and a secondary coil connected with an input terminal of the second AC-to-DC converter; and a controller configured to control switching devices of the first DC-to-AC converter to control a turn-on sequence of each switching device, to calculate signal parameters, and to output the calculated signal parameters.

Disclosed are a quick charging device for charging a plurality of battery packs and a quick charging method using the same, and more particularly a quick charging device for charging a plurality of battery packs, the quick charging device including a positive electrode high-voltage terminal configured to supply voltage, a negative electrode high-voltage terminal configured to supply voltage, a plurality of DC / AC converters connected to each of the positive electrode high-voltage terminal and the negative electrode high-voltage terminal, a plurality of variable AC autotransformers connected respectively to the plurality of DC / AC converters, each of the variable AC autotransformers being configured to adjust a voltage value, a plurality of AC / DC converters connected respectively to the plurality of variable AC autotransformers, a plurality of resistor modules connected respectively to the plurality of AC / DC converters, and a controller connected to each of the variable AC autotransformers, the controller being configured to control the voltage value of each of the variable AC autotransformers.

A power conversion device is disclosed that can be shared by batteries with different output voltages. This power conversion device converts a battery's output voltage into an alternating voltage or a direct voltage lower than the battery's output voltage and comprises a multi-winding transformer (1), a first DC-AC converter (11), and a second DC-AC converter (12), the DC sides of which are connected to the battery. In a case where the battery's output voltage exceeds the voltage rating of semiconductor switching elements, the respective DC inputs of the first DC-AC converter (11) and the second DC-AC converter (12) are connected in series.In a case where the output voltage of the battery is less than the voltage rating, the respective DC inputs of the first DC-AC converter (11) and the second DC-AC converter (12) are connected in parallel or only one of the DC inputs of the first DC-AC converter (11) and the DC inputs of the second DC-AC converter (12) is connected to the battery.

A plasma power control device enabling independent control of high frequency pulse amplitude, and a plasma generation facility including same are provided, the plasma power control device providing high frequency. The power control device comprises: an AC / DC converter electrically connected to a power source; a DC / DC converter electrically connected to an output of the AC / DC converter; a DC / AC converter electrically connected to an output of the DC / DC converter; and a controller for controlling at least one of switches of the DC / DC converter on the basis of an output of the DC / AC converter.

An onboard charging system for an electric vehicle includes a charging port configured to receive single-phase AC power, a power output port configured to provide single-phase AC power to one or more external devices, a single-phase inverter connected to the power output port and configured to provide power sharing functionality, a DC battery selectively coupled to the charging port, a bidirectional inverter configured to convert AC power to DC power and to AC power, with the bidirectional inverter selectively coupled to the battery, an electric motor coupled to the bidirectional inverter and selectively coupled to the charging port, and a DC-to-AC converter.which is selectively coupled to the electric motor and selectively coupled to the power output terminal, and a DC-DC converter which is coupled to the DC-AC converter and selectively coupled to the battery.

A degradation state estimation apparatus estimates a degradation state of a battery energy storage system including a secondary battery and a DC-AC converter. The apparatus includes an estimation arithmetic processing unit (27) that estimates an open circuit voltage (Voc)and an internal resistance (R) with respect to a charging rate of the secondary battery based on a charge-discharge voltage (Vc,d)and a charge-discharge current (I) of the secondary battery, and input-output power of the DC-AC converter, estimates efficiency (ηpcs) of the DC-AC converter and power consumption (Eau,l) of an auxiliary device of the DC-AC converter, and estimates charge-discharge energy efficiency (RTE) with respect to the charging rate of the secondary battery and a rated input-output ratio on an AC side of the DC-AC converter based on the estimated open circuit voltage, the internal resistance, the efficiency of the DC-AC converter, and the power consumption of the auxiliary device of the DC-AC converter.

The invention relates to a converter, which can operate as an AC / DC converter or as a DC / AC converter, for converting an electrical voltage, the converter having: a transformer (T); semiconductor switches (S) which are interconnected in a full-bridge circuit (VBS) comprising two half-bridges (HB1, HB2) which each have semiconductorsemiconductor switches (S) connected in series at a central node (MK1; MK2), wherein the transformer windings of the transformer (T) are connected in series with a capacitor (Ca) between the two central nodes (MK1; MK2) of the full-bridge circuit (VBS); and a controller for controlling the semiconductorsemiconductor switches (S) of the full-bridge circuit (VBS).

Systems, apparatuses, and methods are described for direct current (DC) bus management. In some examples, an energy storage device may be controlled to balance the voltage of the DC bus to maintain a substantially constant voltage on the DC bus. In some examples, control circuitry may determine the total power produced and the total power consumed of the power system and control the energy storage device to balance the power. The energy storage device may balance the power while maintaining a substantially constant voltage on the DC bus. In some examples, a DC to alternating current (AC) converter may be connected between the DC bus and an AC bus, and / or an AC to DC converter may be connected between the AC bus and the DC bus. The DC to AC converter and the AC to DC converter may have different power ratings.

A converter, which can operate as an AC / DC converter or as a DC / AC converter, for converting an electrical voltage with a transformer (T) and with semiconductor switches (S) connected together in a full bridge circuit (VBS), which comprises two half-bridges (HB1, HB2), each having semiconductor switches (S) connected in series at a central node (MK1; MK2), wherein the transformer windings of the transformer (T) are connected in series with a capacitor (Ca) between the two central nodes (MK1; Mk2) of the full bridge circuit (VBS); and with a controller for controlling the semiconductor switches (S) of the full bridge circuit (VBS).

The present invention relates to a rapid charging device for charging a plurality of battery packs and a rapid charging method using same and, more particularly, to a rapid charging device for charging a plurality of battery packs and a rapid charging method using same, the rapid charging device including: a positive electrode high voltage terminal for supplying a voltage; a negative electrode high voltage terminal for supplying a voltage; a plurality of DC / AC converters connected to the positive electrode high voltage terminal and the negative electrode high voltage terminal, respectively; a plurality of slidacs connected to the plurality of DC / AC converters, respectively, to adjust a value of a voltage; a plurality of AC / DC converters connected to the plurality of slidacs, respectively; a plurality of resistor modules connected to the plurality of AC / DC converters; and a controller connected to the plurality of slidacs, respectively, to control a value of a voltage passing through the slidacs.

Vehicle (1) with an electrical system (2) which provides a voltage between 30 V and 60 V, wherein the electrical system (2) comprises a generator (4), an energy storage device (7) and a belt drive (5), wherein the generator (4) is coupled to the belt drive (5) with a drive unit (3) of the vehicle (1) with which the vehicle (1) is driven, wherein the electrical system (2) has an output (8) at which the voltage (6) of the electrical system (2) is provided for external components (9) of the vehicle (1) and / or external components (10), wherein the output (8) has terminals and / or a plug connector, and the vehicle's external component (9) (1) directly taps the voltage of the vehicle's electrical system (2) at the output (8), wherein the vehicle's external component (9) (1) is a DC-AC converter (11) to which the vehicle's external component (10) can be connected, characterized by the fact that three-phase current is provided by the DC-AC converter (11) for the connectable vehicle-external component (10), wherein the vehicle-external component (10) is a drill, a welding machine (6a), a winch (15), a loading crane (14) or a lifting spindle (13), an electric motor (12) is directly connected to the output (8) as a further external component (9) of the vehicle (1), wherein a separate further external component (9) of the vehicle (1) is connected to the electric motor (12) and can be driven / supplied with energy by the electric motor (12), wherein the further external component (9) is a refrigeration machine (17) or a hydraulic pump (18) or a liftgate (19).

A battery charging system for an electric vehicle, comprising a dual-use DC-DC converter, which includes a DC-AC converter and a transformer for generating a rotor winding current in response to an initial DC current in a drive mode and for generating a charging current in response to a charging mode.

Disclosed are a cell electricity quantity balancing module, a balancing method, a heating method and an apparatus, solving problems of complex circuits, poor flexibility, and inability to balance thermal management in the prior art. The module includes two cell side coils, a balancing coil, and three DC / AC converters corresponding to coils, where an AC terminal of a first DC / AC converter is connected in parallel with one cell side coil, a DC terminal is connected in parallel with positive and negative poles of a first adjacent cell; an AC terminal of a second DC / AC converter is connected in parallel with the other cell side coil, a DC terminal is connected in parallel with positive and negative poles of a second adjacent cell; and an AC terminal of a third DC / AC converter is connected in parallel with the balancing coil, a DC terminalis connected in parallel with a direct currentbus.

Hybrid electrical system for powering aircraft electrical equipment from a turbomachine. Hybrid electrical system (8) for powering aircraft electrical equipment from a turbomachine (1) comprising a high-pressure shaft (7) and a low-pressure shaft (3), the system (8) comprising a control unit (20), two electric machines (9, 10) each with two windings, and two electrical distribution control units (12) connected at their output to a high-voltage DC power network (16) and to electrical loads (14), one of the machines (9) being connected to the high-pressure shaft (7) and the other machine (10) being connected to the low-pressure shaft (3). And, for each control unit (12), a first bidirectional DC-AC converter (13) connected between a winding of the first machine (9) and the control unit (12), and a second bidirectional DC-AC converter (15) connected between a winding of the second machine (10) and the control unit (12).Each control unit (12) comprises a directly connected continuous high-voltage battery (17), with the control unit (20) controlling the two converters (13, 15) to maintain network voltage quality (16) within a voltage range and control power sharing between all sources to perform hybridization functions. Figure for the abstract: Fig. 1.

Provided is a power conversion device including: a plurality of clusters that are wired to each other; and a control section that controls the plurality of clusters, wherein the plurality of clusters each have a pair of direct current terminals, a pair of alternating current terminals, and one or more unit converters, the unit converters each have a capacitor, a pair of direct current unit terminals, a pair of alternating current unit terminals, a direct current-direct current converter connected between the pair of direct current unit terminals and the capacitor, and a direct current-alternating current converter connected between the pair of alternating current unit terminals and the capacitor, the pair of direct current unit terminals of each of the unit converters are connected in parallel to the pair of direct current terminals, the pair of alternating current unit terminals of each of the unit converters are connected in series between the pair of alternating current terminals, and the control section causes the direct current power on the pair of direct current terminal side to pulsate at the same frequency as the pulsation of the alternating current power on the pair of alternating current terminal side in each of the plurality of clusters, to reduce the voltage ripple of the capacitor.

A bidirectional n-phase electrical converter device (1) has the following features: an input terminal (18) for connecting a DC voltage source; a DC / DC converter (10, 110, 210) having a first switching element (31, 134) connected to the input terminal (18); p intermediate circuits (90, 190, 290) connected on the output side to the DC / DC converter (10, 110, 210); a DC / AC converter (40, 140, 240) having a second switching element (32, 135), the DC / AC converter (40, 140, 240) being connected downstream of the p intermediate circuits (90, 190, 290); the DC / AC converter (40, 140, 240) has output terminals for connecting the electric machine (60, 160, 260) or an AC network (270); a control device (80, 280) for controlling the second switching element (32, 135) of the DC / AC converter (40, 140, 240) in such a way that a stepped n-phase output voltage (410) can be provided; and the DC / AC converter (40, 140, 240) is designed as a fundamental frequency clocked rotor controlled n-phase voltage system.

The disclosure relates to a converter assembly for transmitting electric power between phases of a three-phase or multi-phase network and a DC bus. The converter assembly includes a DC / AC converter which can be connected to the network via a sine filter and to the DC bus via a split DC-side intermediate circuit, wherein a converter bridge of the DC / AC converter is connected to a central point (M) of the intermediate circuit, and a rectifier is connected in parallel with the DC / AC converter. The DC / AC converter has a controller which is configured to operate the DC / AC converter in an over-modulation mode if the voltage values of the DC bus are less than double the amplitude of one of the phase voltages of the network.