55results about "Dc circuit with intermediate ac" patented technology

The invention relates to the technical field of voltage control, in particular to a time-delay-containing uncertain AC / DC micro-grid DC bus voltage control method, which comprises the following steps: acquiring load change and DC bus voltage fluctuation data, calculating a load current change rate, analyzing the correlation between voltage fluctuation and load change, and performing voltage adjustment. And time delay characteristics in a load state are identified, voltage fluctuation uncertainty factors are identified, and the time delay compensation amount is adjusted to restore the voltage stability. According to the invention, by adopting linear and nonlinear time-delay compensation strategies, the problem of accuracy of time-delay compensation under different load conditions is effectively solved, various load fluctuations and voltage changes can be dynamically adapted, the problem of uncertainty of voltage fluctuations is solved, and the prediction of voltage fluctuations is optimized by dynamically adjusting the weight of uncertainty factors. The over-reaction to sudden voltage change is reduced, the voltage stability is improved, and the operation stability and the voltage regulation precision of the micro-grid are remarkably improved.

Provided is a moving body used in a power transmission system that charges a storage battery mounted on the moving body with power generated by a power generation facility and feeds the power to a power receiving facility from the storage battery transported by the moving body. This moving body is provided with a battery control device that causes the storage battery to be charged with the supply of power based on a voltage value that does not reach a maximum voltage value of direct-current power between the power generation facility and the power receiving facility.

There is disclosed a self-contained welfare cabin having an electrical system with a bespoke user interface. The electrical system has an energy store, an electrical energy generator and a plurality of appliances connected to the electrical system to be powered in use by the energy store and / or electrical energy generator. A control system is arranged to selectively deny power to one or more appliance based on a predetermined control scheme, e.g. when the electrical demand of the appliances is greater than the supply by the energy store and / or generator. A user interface onboard the welfare cabin has a display and an input device for specifying a desired power delivery status for one or more of the appliances, wherein the control system outputs to the user interface details of the one or more appliance being denied power by the control system and the display displays said details to a user. The user interface may take the form of a touchscreen device through which a user can specify an appliance to be used and the control system can return a power denied or power supplied status for one or more appliance on the display.

A mobile body in a power transmission system in which a storage battery mounted on the mobile body is charged with power generated by a power generating facility, and power is supplied from the storage battery transferred by the mobile body to a power receiving facility. The mobile body is provided with a battery control device that charges the storage battery by power supply based on a voltage value that does not become the maximum voltage value of the DC power between the power generating facility and the power receiving facility.

The invention discloses a high-power efficient direct current converter, and relates to the technical field of power electronics. The high-power and high-efficiency direct-current converter comprises an inverter circuit of which the input side is electrically connected with a direct-current input side and which is used for converting direct-current voltage input by the direct-current input side into alternating-current voltage to be output; the input side of any isolation transformation rectification circuit is electrically connected with the output side of the inversion circuit, and the isolation transformation rectification circuit comprises an isolation transformation module and a rectification circuit; the input side of the non-isolation adjusting circuit is used for being electrically connected with the second rectification output side of the corresponding isolation conversion rectification circuit, the output side of the non-isolation adjusting circuit is used for being electrically connected with a corresponding load, and the non-isolation adjusting circuit is used for adjusting the direct-current voltage provided by the second rectification output side and then outputting the direct-current voltage. According to the embodiment of the invention, DC voltage conversion can be effectively realized.

A transport climate control system is disclosed. The transport climate control system includes a self-configuring matrix power converter having a charging mode, an inverter circuit, a controller, a first DC energy storage and a second DC energy storage, and a compressor. The first DC energy storage and the second DC energy storage have different voltage levels. During the charging mode, the inverter circuit is configured to convert a first AC voltage from an energy source to a first DC voltage, the controller is configured to control the self-configuring matrix power converter to convert the first DC voltage to a first output DC voltage to charge the first DC energy storage, and / or to a second output DC voltage to charge the second DC energy storage.

A vehicle system includes DC / DC converters configured to receive electrical currents from high voltage battery modules and output regulating electrical currents to a low voltage battery. The vehicle system includes a control system coupled to the DC / DC converters, the high voltage battery modules, and the low voltage battery, where the control system is configured to control the DC / DC converters to recirculate one or more of the electrical currents back to one or more of the high voltage battery modules in order to balance states of charge in the high voltage battery modules.

Disclosed is an electrical generation system (1) for powering at least one aircraft electrical network, comprising a control device (2) configured to determine a first parameterization setting (PCONs1) for a first converter (C1) and a second parameterization setting (PCONS2) for a second converter (C2), the control device (2) being configured to determine a first power target (PBp1*) according to a distribution voltage setting (VDc*) and a measurement of the distribution voltage (VDc), and a second power target (PBP2*) from a measurement of the first power (PBP), a measurement of the second power (PHP) and a generation setting (PEcu), the second power target (PBP2*) being selected by default as the first power setting (PBP*), the first power target (PBP1*) being selected in case of a malfunction of the power supply by the second converter (C2).

An apparatus and system for power conversion and a method for operating the apparatus are provided. The apparatus comprises: at least one first partial power converter (PPC) string connected in parallel with a DC bus, the at least one first partial power converter (PPC) string comprising at least one series connected PPC and at least one PPC group, where each PPC group comprises more than one parallel connected PPC, where in each PPC group, the at least one first partial power converter (PPC) string is connected in parallel with the DC bus, and the at least one first partial power converter (PPC) string is connected in parallel with the DC bus. The respective outputs of each of the more than one PPC connected in parallel are connected in parallel to form an output of the PPC group, and wherein, in the first PPC string, the at least one series-connected PPC and the respective outputs of each of the at least one PPC group are connected in series, and wherein, in the second PPC string, the at least one series-connected PPC and the respective outputs of each of the at least one PPC group are connected in series. For each PPC of the at least one series-connected PPC and more than one parallel-connected PPC of the at least one PPC group, an input of the PPC is connected to a corresponding power source, and the input of the PPC and an output of the PPC have one common terminal.

The invention belongs to the technical field of power supply architectures, and particularly relates to a computing power center power supply architecture and method based on a multi-level direct-current transformer, and the architecture comprises a medium-voltage multi-level direct-current converter which is connected with a high-voltage direct-current bus of a flexible direct-current power distribution station; the medium-voltage multi-level direct-current converter is formed by sequentially connecting a multi-level NPC converter, a high-frequency transformer and a rectifying circuit; wherein the input end of the multi-level NPC converter is connected with a high-voltage direct-current bus, the output end of the multi-level NPC converter is coupled to the rectifying circuit through the high-frequency transformer, and the output end of the rectifying circuit provides a medium-voltage direct-current bus. According to the power supply framework, the medium-voltage multi-level direct-current converter is adopted to convert high-voltage direct current into medium-voltage direct current, the medium-voltage multi-level direct-current converter is formed by sequentially connecting the multi-level NPC converter, the high-frequency transformer and the rectifying circuit in series, the rectifying link in a traditional alternating-current power supply framework is eliminated, and energy loss is reduced.

The embodiments of this application relate to a multi-motor integrated power circuit, a motor power control method and an electronic device; a power input conversion circuit converts a power input signal from a standby power source to a busbar power signal; a power factor correction circuit converts and superposes an AC input signal of the AC power source to / with the busbar power signal; a first isolation circuit converts the busbar power signal to an isolation output signal; a first switch sub-circuit converts the busbar power signal to a first AC signal; an isolation transformer converts the first AC signal to two or more second AC signals; a first power conversion circuit or an isolation transformer converts the isolation output signal or the second AC signal to a DC drive signal; a second power conversion circuit converts the isolation output signal or the second AC signal to an AC drive signal.

A method to control an automatic machine (1) for the production or the packaging of smoking, hygiene, food or pharmaceutical products; the automatic machine (1) comprising the steps of: controlling electric motors (5, 6) in an intermittent manner, cyclically alternating a motion state, in which each motor has an acceleration phase (AP) followed by a deceleration phase (DP), and a stop state, in which each electric motor (5, 6) is still; and at least partially supplying power, preferably for more than 50%, during the acceleration phase (AP) of each electric motor (5, 6), to the corresponding first static power converter (7, 8) by means of an electric current provided by the capacitor (17).

An embodiment of the disclosure provides a flexible multiport energy routing system comprising a first port configured to connect to an AC grid, a plurality of second ports configured to connect to a plurality of devices, a step-down transformer, a power converter stack, and a third port. The step-down transformer can a high voltage side electrically coupled to the first port and a low voltage side. The power converter stack can comprise a plurality of power converter modules each having a first converter bridge connected to the low voltage side of the step-down transformer and a second converter bridge connected to one or more of the plurality of second ports. Each of the power converter modules can have a converter transformer connected between the first and second converter bridges. The first and second converter bridges can bidirectionally manage AC and DC power flows between the first, second, and third ports.

A power generation system (1) for powering at least one aircraft power network is disclosed, the system comprising a control device (2) configured to determine a first parameterized setpoint (PCONS1) of a first converter (C1) and a second parameterized setpoint (PCONS2) of a second converter (C2). The control device (2) is configured to determine a first power target (PBP1 *) as a function of the distribution voltage setpoint (VDC *) and the measured value of the distribution voltage (VDC), and to determine a second power target (PBP2 *) as a function of the measured value of the first power (PBP), the measured value of the second power (PHP), and the power generation setpoint (PECU). Default selection of the second power target (PBP2 *) as a first power setpoint (PBP *); in the event of a failure in the power supply of the second converter (C2), the first power target value (PBP1 *) is selected as a first power setpoint value (PBP *).

The present invention relates to a power module device and a transport refrigeration system. The power module device is used for equipment powered by batteries or / and fuels, has a working mode and includes: a DC buck module or / and a DC boost module, the DC buck module is configured to buck-convert the DC provided by at least the battery into a low-voltage output DC for output, and the DC boost module is configured to boost the low-voltage input DC provided by the equipment powered by fuel into a high-voltage DC for output; and a control module, which is connected to the transport refrigeration unit and controls the operation of the DC buck module or / and the DC boost module in the working mode. The application of the present invention can effectively save layout space, simplify the original complex wiring harness connection layout, reduce costs, and bring great convenience to the operation and maintenance of equipment such as transport refrigeration units, and can be compatible with and applied to many types of equipment powered by batteries and / or fuel cells.

A method to control an automatic machine (1) for the production or the packaging of smoking, hygiene, food or pharmaceutical products; the automatic machine (1) comprising the steps of: controlling electric motors (5, 6) in an intermittent manner, cyclically alternating a motion state, in which each motor has an acceleration phase (AP) followed by a deceleration phase (DP), and a stop state, in which each electric motor (5, 6) is still; and at least partially supplying power, preferably for more than 50%, during the acceleration phase (AP) of each electric motor (5, 6), to the corresponding first static power converter (7, 8) by means of an electric current provided by the capacitor (17).

There is disclosed a self-contained welfare cabin having an electrical system with a bespoke user interface. The electrical system has an energy store 64, an electrical energy generator 48 and a plurality of appliances connected to the electrical system to be powered in use by the energy store and / or electrical energy generator. A control system is arranged to selectively deny power to one or more appliance based on a predetermined control scheme, e.g. when the electrical demand of the appliances is greater than the supply by the energy store and / or generator. A user interface onboard the welfare cabin has a display and an input device for specifying a desired power delivery status for one or more of the appliances, wherein the control system outputs to the user interface details of the one or more appliance being denied power by the control system and the display displays said details to a user. The user interface may take the form of a touchscreen device through which a user can specify an appliance to be used and the control system can return a power denied or power supplied status for one or more appliance on the display.

The invention relates to an aircraft power supply system (PSS) configured to power onboard electrical devices (D1, D2, D3, D4, D5, D6) comprising at least: - a high-voltage DC electrical subcircuit (HVDCN), - a low-voltage AC electrical subcircuit (LPACN), - a low-voltage DC electrical subcircuit (LPDCN), the system (PSS) further comprising a high-voltage battery switching circuit (HVBATSW), the system (PSS) being such that any power supply line to said low-voltage DC subcircuit, independent of said switching circuit (HVBATSW), is free of low-voltage batteries. Advantageously, this avoids battery redundancy, which is detrimental to the aircraft's weight (AC) and leads to increased complexity in its electrical system.

A field device having first and second input terminals connected to first and second wires of a network; first and second output terminals connected to first and second wires of a sensor unit; a rectifier unit having a first part arranged between the first input terminal and a first node and a second part arranged between the second input terminal and a second node, wherein the first node is connected to the first output terminal. A current measurement device measures a current between the second node and a third node. A voltage measurement device measures a voltage between the first node and the second node. A first semiconductor is arranged between the first node and the third node and configured to pass a bypass current so that the measured current comprises a two-part curve; and a second semiconductor arranged between the third node and the second output terminal.

The present disclosure relates to the field of field devices. The field device includes: a first input terminal configured to be connected to a first wire of a network; a second input terminal configured to be connected to a second wire of the network; a first output terminal configured to be connected to a first wire of the sensor unit; a second output terminal configured to be connected to a second wire of the sensor unit; a rectifier unit, a first portion of which is arranged between the first input terminal and the first node, and a second portion of which is arranged between the second input terminal and the second node; a current measuring device arranged between the second node and the third node; a voltage measurement means for measuring a measurement voltage between the first node and the second node; a first semiconductor disposed between the first node and the third node, and configured to pass a bypass current through the first semiconductor such that the measured current includes a two-part curve; and a second semiconductor disposed between the third node and the second output terminal.

A method for managing operation of an aircraft system comprising at least one electrical energy storage set to be supplied with DC current connected to a DC current power supply bus, at least one electrical machine providing AC current by mechanical draw on a drive system connected to a current generation control unit, a bidirectional converter configured to convert a DC voltage into AC voltage, and a control module of the converter, the management method generating a command for the converter from the angular position (θ) of the electrical machine, from the intensity of the electrical current delivered by the electrical machine, and from the output electrical voltage of the converter.

The invention relates to the field of field devices, particularly to a field device (100) designed for providing a sensor unit (300) with energy from a 2-wire network (200). The field device (100) comprises: a first input terminal (210), configured for being connected to a first wire of the network (200); a second input terminal (220), configured for being connected to a second wire of the network (200); a first output terminal (180), configured for being connected to a first wire of the sensor unit (300); a second output terminal (190), configured for being connected to a second wire of the sensor unit (300); a rectifier unit (105), whose first part is arranged between the first input terminal (210) and a first node (110) and whose second part is arranged between the second input terminal (220) and a second node (120), wherein the first node (110) is connected to the first output terminal (180); a current measurement device (115), arranged between the second node (120) and a third node (130), for measuring a measured current (IM) between the second node (120) and the third node (130); a voltage measurement device (125) for measuring a measured voltage (VM) between the first node (110) and the second node (120); a first semiconductor (140), arranged between the first node (110) and the third node (130) and configured for passing through a bypass current (IB) through the first semiconductor (140), so that the measured current (IM), which is a sum of the bypass current (IB) and a load current (IL) through the sensor unit (300), comprises a two-part curve, with a negative linear current-voltage-correlation in a lower voltage-section and a constant current in an upper voltage-section; and a second semiconductor (150), arranged between the third node (130) and the second output terminal (190).

A high-voltage direct current (HVDC) generation system (100) comprises a prime mover (102), an AC generator (exciter) (104) with two separate windings producing sine and cosine wave AC voltages with a 90-degree phase shift, and two unidirectional voltage generators (UVG1 and UVG2) (106,108) mounted on a common shaft. The synchronization of UVG1 and UVG2 by the prime mover ensures the conversion of AC voltages into unidirectional voltages. The combination of these outputs, guided by the mathematical identity Sin2(θ) + Cos2(θ) = 1, results in a constant DC voltage output. This innovative approach eliminates the need for commutation techniques and offers scalability for generating DC voltages exceeding 500kV. The system to promotes synchronization, reduces waveform distortions, and includes ripple reduction mechanisms for enhanced DC voltage quality. Overall, the disclosed invention presents a comprehensive and streamlined solution for efficient HVDC generation.

This document describes systems for and techniques of alternating-current (AC) power harmonic-based circuit state detection. In various aspects, a system includes a component, a bypass circuit for the component, and a controller with an AC power harmonic-based circuit state detector that can determine a state of the bypass circuit. The AC power harmonic-based circuit state detector may convert an AC voltage of the AC power to a direct current (DC) voltage, filter the DC voltage to obtain a voltage of a harmonic of the AC power, and compare the voltage of the harmonic to a threshold to determine that the bypass circuit is in a fault state (blown fuse). By so doing, the controller of the system can notify a user that the bypass circuit needs to be reset or replaced to reenable operation of the system and avoid poor user experience typically associated with a non- or mis-functioning system.

An automatic machine (1) for the production or the packaging of smoking, hygiene, food or pharmaceutical products and provided with: a frame (2); a plurality of movable operating members, which are mounted on the frame (2) and are designed for carrying out production or packaging operations on the products; a plurality of electric motors (5, 6), each of which moves at least one corresponding movable operating member; a plurality of first static power converters (7, 8), each of which drives a corresponding electric motor (5, 6); a DC electric power line (12), to which all the first static power converters (7, 8) are connected in parallel; a second AC / DC static power converter (13), which, at the input, can be connected to an external AC power supply network (15) and, at the output, is connected to the DC electric power line (12); and a capacitor (17), which is physically separate from and independent of the first static power converters (7, 8) and the second static power converter (13) and is connected in parallel to the electric power line (12) between the second static power converter (13) and the first static power converters (7, 8).

In an arrangement comprising a control unit (1, 2, 3) and at least two electrical consumers (4, 5), at least one of which is an ionizer (4, 5), the control unit (1, 2, 3) controls the electrical consumers (4, 5) and supplies them with DC operating voltages. In order to reduce the technical and design complexity for the control unit (1, 2, 3), it is proposed that the DC operating voltage applied to at least one electrical consumer (4, 5) be reduced by increasing the electrical potential on the low-potential side (7, 9) of this electrical consumer (4, 5).

One embodiment of the present disclosure provides a flexible multi-port energy routing system including a first port configured to connect to an AC grid, a plurality of second ports configured to connect to a plurality of devices, a step-down transformer, a power converter stack, a step-down transformer, a power converter stack, and a third port. The step-down transformer may have a high-voltage side electrically connected to the first port and a low-voltage side. The power converter stack may include a plurality of power converter modules, each having a first converter bridge connected to the low-voltage side of the step-down transformer and a second converter bridge connected to one or more of the plurality of second ports. Each of the power converter modules may have a converter transformer connected between the first and second converter bridges. The first and second converter bridges can manage the flow of AC and DC power bidirectionally between the first, second, and third ports.

An energy storage converter and an energy storage system are provide. The energy storage converter includes: a DC switching power supply circuit configured to provide a first power supply using DC power from the DC side port; an AC switching power supply circuit configured to provide a second power supply using AC power from the AC side port; a power supply circuit configured to supply power to the energy storage converter using the first power supply or the second power supply; and a control circuit configured to, based on an operation state of the energy storage converter, control the DC switching power supply circuit or the AC switching power supply circuit to provide the power supply circuit with power supply. A power supply mode is selected based on an operation state of the energy storage converter. The DC / AC switching power supply circuit independently supplies power at the same time.

A converter for electrically connecting to a three-phase grid and a single-phase grid is provided. The converter includes three DAB modules, each module for converting a corresponding alternating current of the three-phase grid. When connected to the single-phase grid, the third DAB module is bidirectional so that it is operable to filter the power output of the first and second DAB modules. The converter further includes a filter capacitor in electrical communication with the third DAB module through a relay, wherein the relay is responsive to a controller for coupling the third DAB module to the filter capacitor when a single-phase grid is detected, and for coupling the third DAB module to a grid rectifier when a three-phase grid is detected.

Provided is a moving body used in a power transmission system that charges a storage battery mounted on the moving body with power generated by a power generation facility and feeds the power to a power receiving facility from the storage battery transported by the moving body. This moving body is provided with a battery control device that causes the storage battery to be charged with the supply of power based on a voltage value that does not reach a maximum voltage value of direct-current power between the power generation facility and the power receiving facility.