821results about "Three-or-more-wire dc circuits" patented technology

The invention relates to a DC/DC converter design. The converter requires only one single inductor to draw energy from one input source and distribute it to more than one outputs, employing Flexible-Order Power-Distributive Control (FOPDC). It include a single inductor, a number of power switches, comparators, only one error amplifier, a detecting circuit and a control block to regulate outputs. This converter can correctly regulate multiple outputs with fast transient response, low cross regulation, and effective switching frequency for each output. It can work in both discontinuous conduction mode (DCM) and continuous conduction mode (CCM). Moreover, with FOPDC, future output extension is simple, making a shorter time-to-market process for next versions of the converter. The design can be applied to different types of DC-DC converter.

A power supply apparatus is disclosed. The power supply apparatus comprises a determining device, an identifier, a multi-power-output selecting mechanism and a transmission mechanism, for selecting power in the form of varying voltage for outputting therefrom. Wherein the multi-power-output selecting mechanism is electrically connected to the determining device and the transmission mechanism, and the identifier is provided in the transmission mechanism so that the determining device outputs an electrical signal based on the corresponding identifier and transmits the electrical signal to the multi-power-output selecting mechanism. The multi-power-output selecting mechanism selects the converted power based on the output voltage signal corresponding to the electrical signal and outputs it via the transmission mechanism.

A power control system comprises a plurality of POL regulators, at least one serial data bus operatively connecting the plurality of POL regulators, and a system controller connected to the serial data bus and adapted to send and receive digital data to and from the plurality of POL regulators. The serial data bus further comprises a first data bus carrying programming and control information between the system controller and the plurality of POL regulators. The serial data bus may also include a second data bus carrying fault management information between the system controller and the plurality of POL regulators. The power control may also include a front-end regulator providing an intermediate voltage to the plurality of POL regulators on an intermediate voltage bus.

A system and method is provided for using a point-on-load (“POL”) control unit to program and/or monitor a POL regulator. Specifically, in one embodiment of the present invention, a power supply controller is adapted to provide initial-configuration data to at least one POL regulator. A POL control unit (located within the POL regulator) then stores at least a portion of the initial-configuration data in a storage device and uses at least a portion of the initial-configuration data to produce an output. The POL control unit is further adapted to store fault-monitoring data in the storage device and provide at least a portion of the fault-monitoring data to the controller. If the provided portion violates a known parameter, the controller (or POL control unit) may respond by perform a particular action (e.g., disable the POL regulator, etc.). In another embodiment of the present invention, the POL regulator further includes at least one sensor circuit adapted to produce fault monitoring data, or data that can be used to determine the fault-monitoring data. In another embodiment of the invention, the initial-configuration data and the fault-monitoring data are transmitted over a serial data bus.

A module for managing power in an electrical system of a vehicle is disclosed. The module includes a first interface configured for coupling to a first power source. The first power source is configured to power a plurality of loads of the electrical system. The module also includes a second interface configured for coupling to a second power source. The second power source is configured for charging the first power source. The module also includes a device configured for disconnecting the first power source from the plurality of loads. The device is also configured for disconnecting the second power source from the first power source.

A system and method is provided for utilizing output-timing data to control at least one output timing parameter of a point-of-load (“POL”) regulator. Specifically, a power supply controller (“controller”) is adapted to transmit output-timing data to at least one POL regulator. In one embodiment of the present invention, each POL regulator includes an output builder, a control unit and a storage device. The control unit is adapted to store the output-timing data in the storage device. The control unit and the output builder are then adapted to produce an output having at least one output timing parameter in accordance with the output-timing data. Examples of output-timing data include sequencing data, turn-on data, turn-off data, termination data, slew-rate data, etc. For example, a POL regulator may be adapted to utilize output-timing data, or a portion thereof (e.g., slew-rate data), to generate an output having a particular slew rate. Similarly, a POL regulator may be adapted to utilize output-timing data, or a portion thereof (e.g., sequencing data, turn-on data, etc.), to determine (or calculate) a period of time to wait (e.g., delay period) before the output is generated. In other words, output-timing data can be used to produce a series of outputs in a particular order, or sequence.

A resonant converter is provided which may be used for supplying power to the primary conductive path of an inductively coupled power transfer (ICPT) system. The converter includes a variable reactive element in the resonant circuit which may be controlled to vary the effective inductance or capacitance of the reactive element. The frequency of the converter is stabilised to a nominal value by sensing the frequency of the converter resonant circuit, comparing the sensed frequency with a nominal frequency and varying the effective inductance or capacitance of the variable reactive element to adjust the converter frequency toward the nominal frequency.

A distributed power system delivers DC power to a plurality of loads. The distributed power system includes a plurality of power converter modules having an associated DC to DC power conversion operation. Each of the modules includes a power regulation section for receiving a distributed input power from a distributed power line to generate a DC output by controlling the operation of the switching pulse generator. A processing section within the module interfaces with a data communications line for interfacing with the commands. The processing section is capable of operating in both a slave mode to receive commands from said data communication bus and a master mode for generating the commands. In at least one of the modules operating in the master mode, the processing section generates the commands for transmission over the data communications line to an address of one of the other modules. Processing sections in the slave mode of operation are configurable to monitor the operation of said power regulation section. Processing sections in the slave mode of operation are further able to negotiate among active slaves for assignment of a selected module as a new master responsive to the failure of a previous master.

A power supplying apparatus and method for a vehicle are disclosed. A plurality of loads and a plurality of power supplies are connected to each other in such a manner that one of the loads is connected to a plurality of the power supplies, and one of the plurality of the power supplies is connected to a plurality of the loads. Further, the power supplies and the loads are connected through a breaker unit for electrically disconnecting the circuit under predetermined conditions and a unidirectional conductive unit for allowing the current to flow in one direction and blocking the current in the opposite direction.

The invention relates to a system and a method for supplying power to an aircraft comprising several generators supplying alternating current to several different primary electrical master boxes (10, 11, 12 and 13), the various aircraft loads being connected to each of these master boxes. This system comprises conventional master boxes (10, 11, 12 and 13) which supply power loads and at least one master box (40, 41) devoted to actuator loads, this at least one devoted master box being connected to conventional master boxes.

A power control system comprises a plurality of POL regulators, at least one serial data bus operatively connecting the plurality of POL regulators, and a system controller connected to the serial data bus and adapted to send and receive digital data to and from the plurality of POL regulators. The serial data bus further comprises a first data bus carrying programming and control information between the system controller and the plurality of POL regulators. The serial data bus may also include a second data bus carrying fault management information between the system controller and the plurality of POL regulators. The power control may also include a front-end regulator providing an intermediate voltage to the plurality of POL regulators on an intermediate voltage bus.

An auxiliary battery for portable devices that can be used for a variety of applications with high power capacity. The auxiliary battery includes a power input section for receiving electric power from an external power source, a power storage section having a secondary battery for receiving a charge current from the power input section, a power output section having one or more output terminals for producing electric power at output terminals, and an power switch circuit for selectively inputting electric power to the power output section either from the power input section or from the power storage section.

Provided is a switching power supply unit being able to perform voltage conversion between two DC power supplies, and perform appropriate charge operation based on an inputted AC voltage. When a main battery is preferentially charged, an SW control section performs control such that a duty ratio is fixed in switching operation of a switching circuit, and a duty ratio is variable in switching operation of a bidirectional switching circuit. On the other hand, when an accessory battery is preferentially charged, the SW control section performs control such that a duty ratio is variable in switching operation of each of the switching circuit and the bidirectional switching circuit. When the accessory battery is preferentially charged, the SW control section may perform control such that the duty ratio is fixed in switching operation of the switching circuit, and a duty ratio is variable in switching operation of a switching element.

A hybrid power architecture for lighting system that physically separates the conversion of AC-DC constant voltage power from the conversion of DC-DC constant current needed to drive the LEDs. The hybrid power architecture comprises a power converter to generate DC volt power, a battery backup unit for providing backup in the event of power failure and control architecture for controlling the intensity of the lighting system.

A power supply system is provided with a plurality of driving motors, a power converter, and a plurality of power supplies which supply the driving motors with power and have different output voltages. Each power supply is connected with at least one driving motor through the power converter and with at least one driving motor through a path which does not include the power converter.

The invention relates to a circuit (20, 50) for voltage stabilization in an onboard power supply (10), particularly for motor vehicles, which is electrically connected between the onboard power supply (10) to be stabilized and a first energy store (E1). The circuit (20, 50) comprises a diode element (24) which contains a plurality of semiconductor switches (34) connected in parallel, a pilot and control circuit (33) which determines the level of a current flowing through the diode element (24) and controls the semiconductor switches (34) of the diode element (24) on the basis of the determined current level, and a second energy store (E2) which is electrically connected to the diode element (24) and to the onboard power supply (10).

A power subsystem is actively optimized to improve total subsystem efficiency in a way that is responsive to changes in load requirements, power supply variations, and subsystem temperature variations. Detailed, multidimensional power loss models are developed for constituent devices which are then combined into a power subsystem containing a controller and circuity for measuring device operating parameters such as input and output voltage, output current, and temperature. Operating parameters are continually monitored, and set points are correspondingly changed based on the detailed power loss models to achieve maximum overall efficiency for the instantaneous operating state of the system.

A power feed system for a vehicle provided with a plurality of nodes (4a, 4b, 4c) provided with a load control portion (9) for controlling an electric load disposed at each portion of a vehicle, respectively, a power line (1) for supplying power to each node, and a multiplex transmission line (2) connecting each node to each other, comprising an abnormal current detection portion (5) disposed in a line for receiving power feed from the power line at each node for detecting abnormality of a load current, a detection signal generation portion (10) that starts to receive power when abnormality is detected at the abnormal current detection portion and sends a weak current as an output signal, a diagnostic signal line (3) in common to each node, connected to the detection signal generation portion for transmitting the signal from the detection signal generation portion, and a switching portion (6) for switching the power feed from the power line to the load control portion or the detection signal generation portion.

A digital current limiter is provided. The digital current limiter includes a microprocessor that is capable of monitoring and controlling multiple current flows concurrently. The microprocessor can be programmed with various current limits and current control functions than can be set and modified in software. In addition, by including a serial communication interface, the current limits and current control functions of the digital current limiter can be modified remotely.