427results about "Three-or-more-wire dc circuits" patented technology

An electrical line selection system comprising a circuit module configured to connect energy sources with multiple line outputs. The circuit module has a number of inputs configured to connect to energy sources, including rechargeable battery systems, and a number of outputs configured to connect with other electrical systems such as other battery systems, loads, charging sources, and various AC or DC power supplies. A switching circuit is contained by the circuit module and a controller manages the switching circuit based on desired connections and strategies for managing power supplies and current sinks.

A power supply system is installed in a vehicle having an autonomous driving mode. The power supply system includes a first load circuit connected to a first load that operates using electric power from a main battery; a second load circuit connected to a second load that operates using electric power from the main battery or an additional battery and is necessary for the autonomous driving mode; and a main relay provided on a power supply line for electrically connecting the first load and the second load. The first load circuit is located on an upstream side of the main relay. A branch point on a downstream side of the main relay defines a first path and a second path and allows a current flowing from the branch point to the second load by the first path and to the additional battery by the second path.

The object of the present invention is to achieve redundancy of a power supply function by a simple configuration, to ensure operational continuity in case of failure. A power grid (1) comprises: a first power supply path (20-1) that is connected to a main engine-driving power source (100-0) of a vehicle via a power conversion device (101) and to loads (40-1, 41, 42-1) ; and a second power supply path (20-2) that is connected to a power source (100-2) different from the main engine-driving power source (100-0), to loads (40-2, 41, 42-2), and to the first power supply path (20-1) via a switch SW0. The switch SW0 is closed when the first power supply path (20-1) and the second power supply path (20-2) are normal, and is opened when the first power supply path (20-1) or the second power supply path (20-2) is abnormal.

A switch shut-off device is applied to a power supply system equipped with a first power source and a second power source connected via an electrical pathway, and a plurality of switches provided in the electrical pathway and connected in series with each other. The switch shut-off device includes a calculation unit configured to acquire an energization current flowing through each of a pair of switches that are adjacent to each other in the electrical pathway, among the plurality of switches, and to calculate a total current that is a sum of the energization currents flowing to an intermediate point between the pair of switches, and a shut-off unit configured to shut off the pair of switches when the total current exceeds a threshold current.

The invention belongs to the technical field of electricity-hydrogen coupling system control, and provides a voltage-air pressure stability control method and system for an electricity-hydrogen coupling system. The voltage-air pressure stability control method for the electricity-hydrogen coupling system comprises the steps that a battery energy storage system serves as an execution unit, and a voltage regulation model is constructed based on the dynamic relation between voltage and current; a solid hydrogen storage system is used as an object, and an air pressure adjusting model is constructed based on the relation between flow and pressure; constructing a hydrogen production / hydrogen consumption model based on hydrogen production / hydrogen consumption behaviors of the electrolytic cell and the fuel cell; on the basis of real-time sharing of state variables of an electricity-hydrogen coupling system, charging and discharging of a battery energy storage system in a millisecond period are adjusted according to a voltage adjusting model, so that rapid and stable control over the voltage of a direct-current bus is achieved. And regulating and controlling the hydrogen charging and discharging flow of the solid hydrogen storage system in a second-level time scale according to the air pressure regulation model to ensure the stable pressure of the buffer tank and continuous hydrogen supply, regulating the electrolysis and fuel cell power according to the hydrogen production / consumption model to ensure the balance of energy supply and demand, and finally realizing the voltage-air pressure stability coordinated regulation and control between the electric domain and the hydrogen domain.

A charging system includes a first device; a second device; and a power adjustment device including a DC-to-DC conversion unit; and a micro-control unit for receiving a charging instruction, a first power information of the first device and a second power information of the second device and performing the following steps: controlling the DC-to-DC conversion unit to convert a first supply current received by the first device into a first charging current according to the first power information and the second power information when the charging instruction instructs the first device to charge the second device; and controlling the DC-to-DC conversion unit to convert a second supply current received by the second device into a second charging current according to the first power information and the second power information when the charging instruction instructs the second device to charge the first device.

The invention relates to a rail vehicle (12) comprising a traction battery (8) and a power converter (4). The power converter (4) can be supplied with electrical current by the traction battery (8). The power converter (4) is connected to a DC electrical system (7) via a power converter voltage converter (6). The invention also relates to a method for switching on a rail vehicle (12). In this method, the vehicle voltage converter (2) is first supplied with energy from the traction battery (8) via the DC electrical system (7) before the power converter (4) is activated.

The invention provides a DCDC converter, a control method thereof and a communication base station power supply system. A busbar connecting end of the DCDC converter is connected with a DC busbar, and a battery connecting end of the DCDC converter is connected with a battery module; the DCDC converter is used for adjusting the duration that the current of the battery connecting end is greater than or equal to a first current threshold to a second duration when the duration that the current of the battery connecting end is less than a first current threshold is less than a first duration and the voltage of the battery connecting end is less than a first voltage threshold, or adjusting the duration that the current of the battery connecting end is greater than or equal to the first current threshold to a second duration, adjusting the duration that the voltage of the battery connection end is greater than or equal to the first voltage threshold to a third duration; and when the duration in which the current of the battery connecting end is less than the first current threshold is greater than or equal to the first duration, adjusting the duration in which the current of the battery connecting end is greater than or equal to the first current threshold to a fourth duration. The DCDC converter can prevent the battery module from entering the sleep mode in the process of controlling the battery module.

A backup power supply system is configured to be connected between a power supply and a load. The backup power supply system includes a first port, a second port, a conductive path, a power storage unit, a charging circuit, a discharging circuit, a switch; and a control circuit. The first port is configured to be connected to the power supply. The second port is configured to be connected to the load. The conductive path connects the first port to the second port. The charging circuit is provided in a first path connecting the conductive path to the power storage unit. The discharging circuit is provided in a second path that connecting the conductive path to the power storage unit. The switch is provided in the conductive path between the first port and the charging circuit and between the first port and the discharging circuit, and is configured to make the conductive path electrically conductive or electrically non-conductive. The control circuit is configured to control the switch, the charging circuit, and the discharging circuit.

The invention discloses a DC bus voltage stabilization system and method for an AC / DC micro-grid. The method comprises the following steps: transmitting photovoltaic electric energy to a DC bus through a Boost converter of a photovoltaic power generation unit; a super capacitor energy storage branch and a storage battery energy storage branch of the hybrid energy storage unit are connected in parallel to a direct current bus through independent bidirectional Buck-Boost converters; the direct current bus electric energy is converted into alternating current electric energy through a grid-connected inverter of the alternating current inversion grid-connected unit; after the direct-current bus voltage, the voltage of each unit, the current and the energy storage charge state information are obtained through a sampling link of the special control unit, an adjusting instruction is generated through operation, the direct-current bus voltage is stably controlled, and the stability of the direct-current bus voltage is kept. Through hardware design optimization, the DC bus voltage anti-disturbance capability is significantly improved, and the service life of energy storage equipment is prolonged.

This invention relates to the field of microgrid control and discloses a method for regulating a highway service area microgrid based on distributed photovoltaic energy storage. The method includes the following steps: First, traffic flow data is collected to construct a traffic-energy potential field model, mapping discrete vehicles to a continuous potential field to predict net power demand. Second, a kinetic-thermal entropy mapping is constructed using vehicle kinetic energy characteristics, and battery thermal management feedforward control is executed before load arrival. Simultaneously, variational mode decomposition parameters are adaptively adjusted according to the potential field gradient to decompose the power command into high-frequency and mid-to-low-frequency components. The high-frequency components are absorbed by supercapacitors, while the mid-to-low-frequency components are collaboratively distributed among battery packs based on a virtual complex impedance model constructed using health status and temperature. This invention achieves proactive defense against impact loads and refined lifespan extension of energy storage through traffic-energy cross-domain coupling, significantly improving the voltage rigidity and operational stability of the microgrid under extreme conditions.

The invention discloses a power supply system for a magnetic suspension bearing controller. The power supply system comprises an alternating current / direct current voltage conversion unit, a switch control unit, a voltage selection unit, an energy storage unit, a motor, a rectification filtering unit and a direct current / direct current voltage conversion unit, the rectifying and filtering unit rectifies and filters alternating-current voltage output by the motor to generate second direct-current voltage, the direct-current / direct-current voltage conversion unit boosts or reduces the second direct-current voltage to generate third direct-current voltage, and the switch control unit controls on-off of branches where the rectifying and filtering unit and the direct-current / direct-current voltage conversion unit are located. According to the power supply system provided by the invention, natural seamless switching among three power supplies can be realized in the whole process of a magnetic suspension motor system from normal working to tripping power failure to the speed reduction of a rotor below a safe speed value and stopping on an auxiliary bearing, so that safe shutdown of a magnetic suspension motor under a power loss condition is ensured.

The disclosure relates to a power circuit for a mining / construction machine (300). The power circuit (100) comprises: a first power bus (110) configured to be connected to a first power source (200) configured to provide a first power (P1 ) in a first voltage (V1 ); at least one second power bus (120) configured to be connected to a second power source (200') configured to provide a second power (P2) in a second voltage (V2) different to the first voltage (V1 ); an interconnection circuit (130) connected between the first power bus (110) and the second power bus (120); and a controller (140) configured to: set the interconnection circuit (130) in a first circuit configuration (C1 ) in which the first power bus (110) and the second power bus (120) are electrically disconnected from each other so that a first load (310) of the mining / construction machine (300) is powered by the first power source (200) and a second load (310') of the mining / construction machine (300) is powered by the second power source (200'), respectively. Furthermore, the disclosure also relates to a corresponding method and a mining / construction vehicle comprising such a power circuit (100).

An exterior, residential door system comprises an outer door frame adapted to be mounted within an exterior opening of a residence, an exterior residential door pivotally attached to the outer door frame, at least one electric device installed on the door, a main controller mounted to the door, an electric power supply unit operably associated with the door, and a wire harness integrated into the door for transmitting electric power and electrical signals between the electric device, the controller and the source of electric power. The main controller is configured to cooperate with the wire harness to supply power to the at least one electric device and to supply operating signals to the at least one electric device for operating the at least one electric device and to receive operational signals from the at least one electric device responsive to the operating signals.

The invention relates to the technical field of power dispatching, in particular to an expressway direct-current micro-grid energy dispatching method and device, and the device comprises a local dispatching module which is connected with a distributed execution module, an emergency response module, an operation refining module and a scene switching module. According to the welding device, a plurality of sheet-metal aluminum veneers can be sequentially welded, so that the cut openings at the corners of the folded edges of the aluminum veneers are tighter, the tightness degree after welding is improved, the welding point positions of all the aluminum veneers can be kept consistent, the welding precision is improved, and the welding quality is improved. The system has the functions of efficient and stable power supply guarantee, scene adaptation and precise regulation and control, emergency response and safety prevention and control.

A low-voltage system of a transport refrigeration unit (TRU) includes a low-voltage direct current (LVDC) source; and a distribution bus coupled to the LVDC, the distribution bus is coupled to a compressor, at least one condenser, and at least one evaporator.

The invention relates to an aircraft, a computer program product, a storage medium, an electrical system for controlling a hybrid aircraft and a method for controlling an electrical system of a hybrid aircraft, the electrical system comprising at least two busbars configured to transfer electrical energy between a plurality of subsystems of the aircraft, the electrical system includes at least one centralized regulation control device, the method including regulation of the voltage level performed by the controller from one or more variable regulation points, the one or more variable adjustment points are determined from a plurality of predetermined adjustment points according to a property of power transmission to be performed and each variable adjustment point is located in any one of the busbars.

Described is a tractor-trailer, preferably of the electric type, which comprises at least a first user device (11) and a second user device (12); at least a first energy source (21) and a second energy source (22), independent of the first energy source (21), each configured for powering the first user device (11) and the second user device (12); a first power supply circuit (31) configured for connecting the first energy source (21) to the first user device (11) and to the second user device (12); a second power supply circuit (32) configured for connecting the second energy source (22) to the first user device (11) and to the second user device (12); a command and control unit (U) configured for selectively deactivating and for deactivating the power supply of the first user device (11) and of the second user device (12) from the first power supply circuit (31) and from the second power supply circuit (32) on the basis of one or more operating conditions of the tractor-trailer.

A near field communication controller integrated circuit includes a power management circuit configured to retransmit an external supply voltage from at least one power supply input node to at least one power supply output node in a bypass power supply mode. The power management circuit is hardware configured to automatically enable the bypass power supply mode in response to the external supply voltage being present at the at least one power supply input node.

Techniques for machine learning-based degradation optimization are disclosed. In embodiments, a method includes identifying a power module, wherein the power module is controlled with a set of variables; determining, using functional relations of degradation of a degradation machine learning model, optimal set-point values that minimize degradation of the power module while utilizing minimal resources; and reducing a degradation rate of the power module by adjusting one or more of the variables that control the power module based on the determined optimal set-point values.

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.

The invention discloses an instantaneous power distribution method and device of an isomorphic energy storage converter, terminal equipment and a storage medium, and belongs to the technical field of energy storage converter power distribution.The method comprises the steps that the energy storage output current, the energy storage output voltage, the energy storage input current and the output voltage instruction value of the isomorphic energy storage converter to be distributed are obtained; further calculating to obtain a first output current, a first correction current reference and a second correction current reference; performing gain amplification and difference suppression to obtain a third correction current reference; performing current outer loop control to obtain a phase shift angle of the isomorphic energy storage converter; and finally, performing on-off control on the isomorphic energy storage converter through the phase shift angle to obtain the instantaneous distribution power of the isomorphic energy storage converter. According to the invention, the problem that the continuous power oscillation of the isomorphic energy storage converter is caused because the same instantaneous power distribution cannot be carried out in the prior art can be solved.

A power supply redundancy system includes a main battery that supplies power to a first load unit and a second load unit, a sub-storage that supplies power to at least the second load unit, a switching unit that switches a power supply path from the main battery and the sub-storage to the first load unit and the second load unit, a control board on which a switching control unit is mounted, the switching control unit for switching and controlling the switching unit, and a housing that accommodates at least the main battery, the sub-storage, and the switching unit. The control board is operable by receiving power supply from both the main battery and the sub-storage.

The invention relates to a vehicle electrical system (2) for a motor vehicle, comprising: a first vehicle electrical system part (4) and a second vehicle electrical system part (6), the second vehicle electrical system part (6) having a main network (10) and a redundancy network (12); at least one non-safety-relevant load (14); at least one first safety-relevant load (16) in the main network (10); a second safety-relevant load (18) in the redundancy network (12), which second safety-relevant load is redundant to the first safety-relevant load (16); a first disconnecting element (20) for disconnecting the main network (10) from the redundancy network (12); and a power supply (22) for the loads (14, 16), which comprises a first DC-to-DC converter (24), which is connected to the first vehicle electrical system part (4) and the second vehicle electrical system part (6) and is arranged in the redundancy network (12) such that, by means of the first DC-to-DC converter (24), the supply of electrical power to the redundancy network (12) is ensured when the redundancy network is disconnected from the main network (10) by the first disconnecting element (20).

The application provides a cross-voltage domain power supply circuit and a circuit control method, and relates to the technical field of submarine communication. The cross-voltage domain power supply circuit comprises a control module, a main power supply module, a backup power supply module and a load function circuit module; a main supply state signal of the main power supply module and a backup supply state signal of the backup power supply module are collected by a main circuit detection submodule and a branch circuit detection submodule; the control circuit submodule receives and processes the main supply state signal and the backup supply state signal, generates a switch control signal, and controls the on-off state of the first bypass switch and the second bypass switch and the connection state of the switching switch according to the switch control signal. The cross-voltage domain power supply circuit provided by the application controls the state of the switch in the circuit according to the supply state signal by the control circuit submodule, so that the main power supply module and the backup power supply module can realize intelligent switching, the heat loss in the power supply circuit is reduced, the reliability of power supply is improved, the circuit structure is simple, and the space occupation is reduced.

A control system for charging an aircraft, comprising: a battery pack, an input device configured to enable a user to select between different charging modes, two main contactors connecting the battery pack to an electric propulsion unit (EPU) load and an auxiliary load, a EPU load contactor connecting the battery pack to the EPU load and a controller configured to receive the selected charge mode and control the contactors, keep the two main contactors open upon receiving a user selection to charge in a first mode, close the two main contactors and keep an EPU load contactor open upon receiving a user selection to charge in a second mode, and close the two main contactors and the EPU load contactor upon receiving a user selection to charge in a third mode.

The invention discloses a combined mutual standby DC power supply system, and relates to the technical field of power supply management, and the system comprises the steps: building a bus dynamic feature vector; performing time domain-frequency domain joint reconstruction on the dynamic feature vector of the bus, extracting an inertia coefficient, an impedance change slope and a power phase drift amount corresponding to the bus, and establishing a bus state mapping model; executing reverse mapping of the bus dynamic response by using the bus state mapping model, and generating a virtual state vector of each direct current power supply unit; according to the time sequence evolution difference of the virtual state vector, constructing a relative deviation matrix between the direct current power supply units, and identifying an abnormal power supply behavior; and carrying out dynamic power supply switching management by utilizing an identification result. The technical problems that in the prior art, the dynamic response of the direct current bus cannot be recognized in real time, and abnormal detection and switching management of the power supply unit are lagged are solved, and the technical effects of improving the power supply reliability of the system and achieving self-adaptive mutual backup and dynamic switching among multiple units are achieved.