96results about "Two-wire dc circuits" patented technology

A detection circuit of an external display device includes a first connector, a display circuit, a switch circuit, a power supply circuit, and a control circuit. The display circuit is configured to provide a display signal to the external display device via the first connector. The power supply circuit is configured to provide power required for the display circuit to operate via the switch circuit when the switch circuit is turned on. The control circuit is configured to turn on the switch circuit to turn on the power supply circuit and the display circuit when the external display device is detected. After the switch circuit is turned on, the control circuit is configured to accumulate a duration of continuous time during which the external display device is not detected or a number of times of detection, and turn off the switch circuit to turn off the power supply circuit and the display circuit when the duration of continuous time reaches a time threshold or the number of times of detection reaches a number threshold.

The invention relates to a converter (100) comprising a conversion stage (104) and an output protection circuit (106). The output protection circuit (106) comprises a first input terminal (201) and a second input terminal (202), and a first output terminal (203) and a second output terminal (204). The first input terminal and the first output terminal are on a first voltage level and the second input terminal and the second output terminal are on a second voltage level. The converter further comprises a switch S1 connected between the first input and output terminals or between the second input and output terminal, and an interruptible freewheeling circuit (120) between the first output terminal and the second output terminal. The freewheeling circuit comprises a freewheeling path (122) including a freewheeling switch and a freewheeling diode, and a voltage clamping device parallel to at least the freewheeling switch.

Conveyor arrangement (1), adapted to convey an object (9), the conveyor arrangement (1), comprising, - a plurality of conveyor zones (2), each conveyor zone (2) is adapted to convey an object (9) from an inlet (1) of said conveyor zone (2) to an outlet (0) of said conveyor zone (2), each conveyor zone (2) is provided with a drive unit (3M), each drive unit (3M) is adapted to transform electrical power into mechanical power required for conveying said objects (9); - a plurality of, in particular at least two, power supply devices (21) adapted to supply electric power (P21) to the drive units (3M); - in particular at least one controller (10, 11) adapted to control operation of said conveyor zones (2); the conveyor arrangement (1) further comprising a power supply network (20), comprising - the plurality of power supply devices (21); - the plurality of drive units (3M); - at least one power supply line (23) connecting the plurality of power supply devices (21) with the plurality of drive units (3M).

This power distribution system comprises: a power converter (4) that converts the voltage of a primary-side DC bus (1) into AC or DC and outputs the AC or DC to power feeding lines (9); and a voltage controller (104) that controls the power converter (4) so as to change the output voltage to the ground of each line of the power feeding lines (9) while keeping the output voltage of the power converter (4) constant.

The application discloses a kind of suitable for symmetric unipolar-bipolar DC operating mode conversion and control method and system, applied to DC control technical field, method includes obtaining the data of symmetric unipolar-bipolar DC system;Real-time operating parameter data and system reference parameter data are handled, and fault data is obtained;Device physical parameter data are handled, and DC system digital simulation model is obtained;DC system digital simulation model is handled, and stability boundary condition is obtained;Based on fault data and stability boundary condition, DC voltage data is obtained;Based on fault data and rated voltage, determine thermal stability limit voltage data;Based on power factor data, DC voltage data and thermal stability limit voltage data are handled, and target voltage data is obtained;With target voltage data as reference, power adjustment processing is carried out.The method provided by the application can solve the technical problem that the voltage reduction operation control strategy cannot adapt to different operating conditions of the system.

The present invention relates to a smart energy management system (1) that combines all energy equipment in the energy infrastructure and enables this equipment to be smartened with artificial intelligence. Thanks to the smart energy management system (1), all devices that can access the Internet are included in the cloud network and these devices are enabled to communicate with each other through artificial intelligence. With the smart energy management system (1), a world-class infrastructure is achieved with uninterrupted communication, where high-level infrastructure is smartened, managed, sustainability and continuity are ensured. With the commissioning of the smart energy management system (1), significant energy savings are achieved.

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.

The invention discloses a power supply system, a base station and a control method, and relates to the technical field of power supply. The method comprises the steps that the input ends of M voltage conversion modules are connected with a first bus, and the output ends of the M voltage conversion modules are connected with a second bus; the voltage conversion module can convert the first voltage of the first bus into the second voltage of the second bus; the control module can control part of the M voltage conversion modules to be turned off or turned on according to the load connected to the second bus detected by the N detection modules, and the smaller the load connected to the second bus is, the more the turned-off voltage conversion modules in the M voltage conversion modules are. Thus, in the power supply system, the power supply buses with different voltages are adopted to supply power to the load, direct current loss in the power supply process can be reduced, the voltage conversion efficiency of the voltage conversion module is improved, and therefore the power supply efficiency is improved.

An exemplary power conditioning method and system are disclosed using a power converter in combination with a diode bridge rectifier and a series transformer in which the power converter is configured to inject VARs to a high-speed rotating machine to compensate for the machine reactance. By injecting VARs into the machine using the power converter through the series transformer, the power converter can be fractionally rated, in terms of power rating, to a lower power rating which would otherwise have to be higher due to the reactance requirements due to its high-frequency input. And additionally, because of the lower power rating, the transformer can be beneficially rated for the corresponding power level of the machine. The operation of the diode bridge rectifier and a transformer does not add to the complexity of the control of the system or that of the power converter.

Techniques are provided for improving power efficiency of a multiphase direct current (DC)-DC voltage converter configured to provide DC power to a time domain duplexing radio by enabling a number of phases during a downlink subframe and disabling the number of phases on or after cessation of the downlink subframe.

A load is detachably connected to a device connector of a switch device. A resistance value of a switch circuit when a sub-switch is ON is greater than an ON resistance value of a main switch. A microcomputer acquires node voltage information indicating a node voltage of a connection node located downstream of the main switch and the sub-switch from a voltage detection unit in a state where the main switch is OFF and the sub-switch is ON. The microcomputer determines whether a switch current that flows via the main switch when the main switch turns ON will be less than a current threshold value, based on the acquired node voltage information.

A method for distributing power from a set power rate power source to a plurality of loads 16a, 16b, 16c comprising determining, for each of the loads, an individual energy requirement over a first up

Method for operating a vehicle electrical system (10, 50) comprising a first actuator and a second actuator, and the first actuator and the second actuator are connected to each other via a common control unit, wherein energy fed back from the first actuator is transferred via the common control unit to the second actuator and is at least partially consumed in it.

An integrated circuit is described for dynamically adapting power supplied by at least one node in a network. This integrated circuit may include a control circuit (or control logic) that performs operations, which include receiving charge information associated with one or more nodes in the network, determining dynamic power supplied to an electronic device by at least one node in one or more nodes, at least in part, based on the charge information, and issuing a command to at least one node specifying or indicating the dynamic power of at least one node at a given time.

A DC socket includes: first and second socket contacts respectively electrically coupled to a positive and a negative electrodes of a power supply; a trigger circuit generating a first trigger signal upon a plug being inserted to a first predetermined position; an on-off control unit connecting to the trigger circuit and including a first line and a second line respectively connected between the first socket contact and the positive electrode, where the first line is provided with a semiconductor switching element, the second line is provided with a relay, and the on-off control unit controls the semiconductor switching element to be switched on upon receiving the first trigger signal; a voltage detection unit connected between the first line and the on-off control unit, where the on-off control unit controls the relay to be switched on upon voltage of the first line being equal to a power supply voltage.

An aircraft power system for providing regulated voltage and regulating power fluctuations in a tethered aircraft includes a plurality of light-emitting diodes (LEDs) onboard an aircraft having at least one propulsion unit. At least one electrical circuit is onboard the aircraft. The at least one electrical circuit includes a current-amplifying regulator in parallel with a speed controller of the at least one propulsion unit, the current-amplifying regulator in parallel with the speed controller providing the regulated voltage to the speed controller. A tether is connected between the aircraft and a power source located remotely from the aircraft. Power is transmitted via the tether to the aircraft and at least a portion of the plurality of LEDs.

A rechargeable battery jump starting device having a highly conductive electrical pathway from a rechargeable battery of the device to a vehicle battery being jump started. The highly conductive pathway can be provided by a highly electrically conductive frame connecting one or more batteries of the rechargeable battery jump starting device to battery clamps of the rechargeable battery jump starting device.

Embodiments of the present application provide an apparatus for controlling a circuit breaker module, an energy storage system, and a microgrid system. The circuit breaker module is connected between the energy storage system and a power system, when a working state of the circuit breaker module is an on state, a path for transmitting electric energy between the energy storage system and the power system is in an on state, and when the working state of the circuit breaker module is an off state, the path for transmitting electric energy between the energy storage system and the power system is in an off state. The apparatus includes a control circuit, the control circuit includes a switch module and a release, and the control circuit is configured to drive the circuit breaker module to change from the on state to the off state through the release when a state of the switch module changes. By means of the apparatus for controlling a circuit breaker module, the energy storage system, and the microgrid system provided in the embodiments of the present application, the circuit breaker module can be timely and effectively controlled to be disconnected.

The present invention provides a solar-based multipurpose utility system which is an integrated appliance that uses solar energy to perform various utility functions such as cooking, ice melting, water heating, room heating, and food drying. The phase change material has been used in the system for enhancing the thermal storage capacity of the system. The invention supports the idea of providing wireless remote control for the overall system to the end-user using IoT-based sensors and devices. The system comprises Fresnel lens with cover (21), Fresnel lens (22), ice pot (23), water pipe (24), reflector (25), water storage tank (26), blower (13), phase change material (PCM) filled in evacuated tube arrangement (27), hot air sprayer (28), water filter (15), battery with electronic components (3), water tap (29), temperature and humidity sensor (16), exhaust fan (12), and solar panel (1).

Hardware that is configured to gather data on a process line. These configurations may include devices that can connect to existing process control networks, like 4-20 mA control loops. These devices may include rechargeable power sources, for example, a supercapacitor. This power source can power a sensor or like hardware that resides in proximity to a control valve or other device on the process line. The sensor may require a power level for a short time that significantly exceeds one available from 4-20mA current loop network. As an added benefit, the circuitry may find use to allow the power source to store power, or re-charge, at periodic intervals to ensure that the sensor can gather data regularly during the lifetime of the control valve.

A system and method for reducing energy loss in a multiple inverter system provides a DC voltage to multiple inverters via a shared DC bus. Each inverter is configured to control operation of a motor operatively connected to a corresponding inverter. An amplitude of the DC voltage present on the DC bus is monitored, and each inverter selectively draws current from or delivers current to the DC bus. An amplitude of the current drawn from or delivered to the DC bus is monitored by each inverter. A level of energy delivered by at least one of the inverters to the DC bus is determined when the amplitude of the DC voltage exceeds a predefined threshold during a first operation of the multiple inverter system. At least one subsequent operation of the multiple inverter system is adapted responsive to the level of energy delivered to the DC bus.

A circuit breaker module is connected between the energy storage system and a power system, when a working state of the circuit breaker module is an on state, a path for transmitting electric energy between the energy storage system and the power system is in an on state, and when the working state of the circuit breaker module is an off state, the path for transmitting electric energy between the energy storage system and the power system is in an off state. The apparatus includes a control circuit, the control circuit includes a switch module and a release, and the control circuit is configured to drive the circuit breaker module to change from the on state to the off state through the release when a state of the switch module changes.

The invention relates to a computing power center direct current system virtual modulus impedance control and stability domain evaluation method. The method comprises the following steps: establishing a small signal model of the bipolar VSC, converting the small signal model into a modulus space by combining a modulus conversion matrix, and deducing a transfer function relationship among variables in the modulus space; deriving closed-loop output impedance of the bipolar VSC containing the virtual modulus impedance control parameters based on the transfer function relationship; then, in combination with the modulus conversion matrix, lines and loads outside the output port of the bipolar VSC are mapped to a modulus space, and the relation between the output voltage and the output current of the bipolar VSC is deduced; and finally, based on the closed-loop output impedance and the relationship between the output voltage and the output current, deducing an input-output gain matrix of the power center bipolar direct current system, and identifying the stability domain of the system in combination with a generalized Nyquist criterion. Bus voltage oscillation can be suppressed, and effective evaluation of the system stability domain can be realized.

An exemplary method and system for power conditioning using a combined diode bridge rectifier and series transformer power converter is disclosed, where the power converter is configured to inject VARs into a high speed rotating machine to compensate for its mechanical reactance. By using a power converter to inject VARs into the machine via a series transformer, the power converter can be rated slightly lower in terms of power rating than would otherwise be required to be rated higher due to reactance requirements from high frequency inputs. Furthermore, due to the lower power rating, the transformer can be beneficially rated for the corresponding machine power level. The operation of the diode bridge rectifier and transformer does not add any complexity to the system control or power converter control.

The embodiment of the invention relates to a converter with a multifunctional output protection circuit and a method. A converter (100) includes a conversion stage (104) and an output protection circuit (106). The output protection circuit (106) includes a first input terminal (201) and a second input terminal (202), and a first output terminal (203) and a second output terminal (204). The first input terminal and the first output terminal are at a first voltage level, and the second input terminal and the second output terminal are at a second voltage level. The converter further comprises a switch S1 connected between the first input and output terminal or between the second input and output terminal, and a interruptible current circuit (120) between the first output terminal and the second output terminal. The freewheeling circuit includes: a freewheeling path (122) including a freewheeling switch and a freewheeling diode; and the voltage clamping device is at least connected with the follow current switch in parallel.

A charging control method includes: converting an input power to a DC power; receiving the DC power by a detachable cable to generate a bus power; converting the bus power to a charging power for charging a battery in a charging period; and adjusting the DC power and / or the charging power to track a maximum of a power conversion efficiency; wherein the power conversion efficiency includes one of the following: an input power conversion efficiency, which is a conversion efficiency of converting the input power to the charging power; a DC power conversion efficiency, which is a conversion efficiency of converting the DC power to the charging power; or a bus power conversion efficiency, which is a conversion efficiency of converting the bus power to the charging power.

Aircraft electrical distribution system. Electrical distribution system (1) for at least two separate electrical generators (3) of an aircraft (5), the electrical distribution system (1) comprising: at least two supply branches (7), a connection node (9), the connection node (9) also having a connection (11) for connecting electrically consuming devices (13), at least two disconnecting devices (15), each disconnecting device (15) comprising a contactor (17) provided in a corresponding supply branch (7), a measuring system (19) for measuring a physical quantity, and a decision element (21) configured to switch the contactor (17) from a conducting configuration to a non-conducting configuration when said measurement of the physical quantity satisfies a condition representative of an electrical energy-consuming state of the corresponding electrical generator (3). Figure 1

The invention relates to an on-board electrical system arrangement (1) comprising: a high-voltage battery (2), a high-voltage electrical system (3), a low-voltage electrical system (6), a low-voltage power source (7), and a DC / DC converter (8). The high-voltage electrical system (3) and the high-voltage battery (2) are interconnected via main potential lines (HV+, HV-) with switching elements (S+, S-). A low-voltage side (LV) of the DC / DC converter (8) is connected to the low-voltage electrical system (6) and the low-voltage power source (7), and a negative potential connection line (AL-) of the DC / DC converter (8) is connected to a high-voltage side (HV) of the DC / DC converter (8) and to the high-voltage battery (2). According to the invention, a positive potential connection line (AL+) of the DC / DC converter (8), in which a disconnect switch (TS) is arranged, is connected to the high-voltage side (HV) of the DC / DC converter (8) and to the high-voltage battery (2), and a positive potential bypass line (BL+) to the switching element (S+) arranged in the positive potential main line (HV+), in which a pre-charge switch (VS+) is arranged, is connected between the high-voltage side (HV) of the DC / DC converter (8) and the disconnect switch (TS) to the positive potential connection line (AL+) and between the switching element (S+) arranged in the positive potential main line (HV+) and the high-voltage vehicle electrical system (3) to the positive potential main line (HV+).