Abstract:
Device for operative connection between a subsea step out cabie far end and subsea toads such as pumps, compressors and control systems, distinctive in that the device is a subsea DC provider (SDCP), and it comprises: a SDCP unit for altering alternating current power received from the step out cable to direct current power for delivery to said loads, a gas and/or liquid filled vessel into which said unit is arranged, and the device is a SDCP for subsea location at a far end of a subsea step out cable connected to at least one AC power source at the step out cable near end, and the step out length is long, which means long enough to cause, stability problems at frequency and power levels feasible for subsea pump and compressor motors, and where the device via the step out cable receives input electrical power at a low enough frequency to have stable transmission and the device, operativeSy connected to the subsea motors, delivers a DC output electrical amperage and voltage feasible for operation of connected pump and compressor motors. System for subsea pressure boosting of hydrocarbon fluid or other fluid, comprising the device.
Abstract:
The present disclosure relates to power transformers and medical devices having the same. A power transformer may include a first magnet comprising a first magnetic core and a first winding and a second magnet comprising a second magnetic core and a second winding wound around a side wall of the second magnetic core. The first magnetic core may include an annular body, and the first winding may be wound around a side wall of the annular body. The second magnetic core may include a groove extending from an end surface of the second magnetic core. The first magnet and the second magnet may be contactless. At least part of the annular body may be embedded in the groove. The first winding and the second winding may be at least partially overlapped along an axial direction of the second magnetic core.
Abstract:
Die Erfindung betrifft ein Verfahren zum Betreiben eines Kraftfahrzeugbordnetzes mit einer generatorisch betreibbaren elektrischen Maschine und einem über Phasenanschlüsse mit der elektrischen Maschine verbundenen aktiven Brückengleichrichter, der in einem Gleichrichterbetriebsmodus und einem Kurzschlussbetriebsmodus betreibbar ist. Das Verfahren umfasst unter anderem, nachdem der Brückengleichrichter in einer ersten Verfahrensphase zumindest einmal in einem Kurzschlussbetriebsmodus betrieben wurde, auf Grundlage zumindest eines Merkmals eines Signals, das eine Spannung kennzeichnet, die zwischen den Gleichspannungsanschlüssen des Brückengleichrichters abfällt zu bestimmen, ob das Signal den oberen Schwellwert aufgrund eines Kabelabrisses eines Kabels an zumindest einem der Gleichspannungsanschlüsse überschritten hat. Ist dies der Fall,wird der Brückengleichrichter anschließend in einer zweiten Verfahrensphase für einen verlängerten Zeitraum in dem Kurzschlussbetriebsmodus betrieben und/oder es wird in der zweiten Verfahrensphase zum Ansteuern der aktiven Schaltelemente ein Ansteuersignal mit einer zweiten, höheren Schaltzeit verwendet als in der ersten Verfahrensphase. Mittel zur Implementierung eines entsprechenden Verfahrens sind ebenfalls Gegenstand der Erfindung.
Abstract:
A power inverter has an inverter unit with a housing defining a main compartment and a first lateral compartment adjacent the main compartment. The main compartment contains an inverter power module configured to convert direct current (DC) power into alternating current (AC) power output, an inverter driver module configured to provide driving signals to drive the inverter power module, an inverter control module configured to provide control signals to the inverter driver module to control the AC power output, and a capacitor for coupling to the DC power. The capacitor is arranged on or over at least one of the inverter power module, the inverter driver module, or the inverter control module. Additionally, the power inverter has a base on which the housing sits, the base comprising a heat sink configured to draw heat away from one or more of the inverter power module, the inverter driver module, or the inverter control module.
Abstract:
This patent applications describes several methodologies of decreasing the size of the input bulk capacitor, of increasing the power factor and reducing the RMS current through the input bulk capacitor. Some of these methodologies do not require any hardware change from the conventional AC -DC adapters and all is accomplished just through the modulation of the input current drawn by the isolated DC-DC converter. Others methodologies described in this patent application do require small changes in the hardware and that will amplify the effect of current modulation in reduction of the input bulk capacitor and will significantly improve the power factor.
Abstract:
A power converter circuit rectifies a line voltage and applies the rectified voltage to a stack of capacitors. Voltages on the capacitors are coupled to a plurality of regulating converters to be converted to regulated output signals. The regulated output signals are combined and converted to a desired DC output voltage of the power converter. Input currents of the regulating converters are modulated in a manner that enhances the power factor of the power converter.
Abstract:
A charging system and a method of operating the same are provided. The charging system includes an electric machine which may be a wound or un-wound rotor type or a doubly fed induction motor (DFIM). A control system is coupled to the electric machine and a battery system. In the case of a wound rotor, the control system is coupled to stator windings and a rotor winding for controlling excitation of the stator windings and the rotor winding. The charging system is AC and DC compatible. In the case of an AC power source, the control system injects excitation into a rotor winding to induce a desired voltage in the stator, if the power supply voltage of the power supply is greater or smaller than the voltage of the battery system. Other modes of operation allowing for safe charging and discharging of a battery system are also described herein.
Abstract:
Eine fahrzeugseitige Ladevorrichtung (LV) ist mit einem Wechselspannungsanschluss (WA),einem daran angeschlossenen Gleichrichter (GR), mindestens einem ersten und einem zweiten Gleichspannungswandler (DC1, DC2), die jeweils mindestens einen Zwischenkreiskondensator (C1, C2) und mindestens eine Schaltereinheit (SE1, SE2) aufweisen, und einem Gleichspannungsanschluss (GA) ausgestattet. Der Gleichrichter (GR) ist über die Gleichspannungswandler (DC1, DC2) mit dem Gleichspannungsanschluss (GA) verbunden. Die Ladevorrichtung umfasst eine Schaltervorrichtung (S1, S2, S3). Diese verbindet den ersten Gleichspannungswandler (DC1) mit dem zweiten Gleichspannungswandler (DC2)in schaltbarer Weise. Die Schaltervorrichtung (SV) verbindet in einem ersten Schaltzustand die Zwischenkreiskondensatoren (C1, C2) und die Schaltereinheiten (SE1, SE2) der ersten und zweiten Gleichspannungswandler (W1, W2) parallel miteinander und verbindet in einem zweiten Schaltzustand (2) die Zwischenkreiskondensatoren (C1, C2) und die Schaltereinheiten (SE1, SE2) seriell miteinander verbindet. Die Ladevorrichtung (LV) weist ferner mindestens einen dritten Gleichspannungswandler (DC3) auf, der ebenfalls den Gleichrichter (GR) mit dem Gleichspannungsanschluss (GA) verbindet.
Abstract:
An exemplary breaker-less, medium voltage DC distribution system capable of meeting the demanding operational and performance requirements of, for example, a Navy combatant, is disclosed. Survivability is maximized in the disclosed architecture by providing multiple, individually-controlled power feeds from each "islanded" turbine generator. The system lakes advantage of the rapid response of power electronics for fault protection without the penalty of having to shut down major segments of the electrical system to isolate a fault. The use of a multiphase generator configuration with multiple rectifiers (PCM4s) provides for system redundancy and provides better fault tolerance, since the greater the number of rectifier modules used, the less impact a rectifier or bus fault will have on system performance.
Abstract:
A communication controller for performing data encryption and data decryption of data communication packages to be transferred in a network (such as LAN: Local Area Network, or a WAN: Wide Area Network). The data communication package contains a first section of non-encrypted data and a second section of encrypted data. The communication controller comprises a session key LUT unit (186), and a transmission and encryption section, which includes a data read transmission control unit (102), a data compressing unit (118), a data encryption unit (126), an integrity check value calculation unit (122) constituting a first series configuration, a network transmission controller (134), and a first switch means (108) enabling switching between two modes of operation a first mode of operation providing bypassing or disabling of the first series configuration and enabling communication between the data read transmission control unit (102) and the network transmission controller (134) for transferring the input data directly hereto and a second mode of operation enabling communication between the data read transmission control unit (102) through the first series configuration to the network transmission controller (134).