An electrical architecture for an electric/engineless trailer refrigeration unit (ETRU) is provided. The electrical architecture includes a battery, multiple auxiliary direct current (DC) power sources, multiple auxiliary alternating current (AC) power sources, TRU components, a master controller and a reconfigurable power conversion unit (RPCU). The RPCU is configurable by the master controller to transmit electrical power between the battery, the multiple auxiliary DC power sources, the multiple auxiliary AC power sources and the TRU components in accordance with current operational conditions, power levels of the battery, the multiple auxiliary DC power sources and the multiple auxiliary AC power sources and power demands of the TRU components.

A charging system for electric vehicles is disclosed, which includes at least one charging port with an interface for power exchange with at least one electric vehicle, and at least one power converter for converting power from a power source such as a power grid to a suitable format for charging the vehicle. The power converter can be at a remote location from the charging port, such as a separate room, and/or a separate building.

A system for generating power using a variable speed generator is disclosed. The system comprises an engine configured to operate at variable RPMs and an axial flux oriented generator comprising a rotor assembly with a circular plate and alternating polarity magnets, and a stator assembly with triangular-shaped coils connected to achieve desired output voltages and power levels. Output terminals are connected to a rectifier for converting AC to DC power. A processor receives load requirements and maintains a constant set output frequency independent of engine RPM, adjusts generator speed accordingly, and produces multiple output channels with Voltage Buffers to accommodate load spikes. A user interface allows software-based selection of AC or DC output, single or three-phase, and different frequencies without physical reconfiguration. Connectivity elements using CAN-Bus architecture enable integration and monitoring. An electronics package with PWM and IGBT modules modulates voltage output to maintain performance despite load fluctuations.

A method of providing a single structure multiple mode antenna is described. The antenna is preferably constructed having a first inductor coil that is electrically connected in series with a second inductor coil. The antenna is constructed having a plurality of electrical connections positioned along the first and second inductor coils. A plurality of terminals is connected to the electrical connections that facilitate numerous electrical connections and enables the antenna to be selectively tuned to various frequencies and frequency bands.

A door system comprises a door frame adapted to be mounted within an opening, a door pivotally attached to the door frame, an AC/DC converter operably associated with the door frame, a DC electric device mounted to the door, at least one sensor mounted to the door frame or the door, and a power management controller configured to receive an input from the at least one sensor and send a command to the DC electric device. The AC/DC converter is configured to be electrically connected to an AC power unit disposed outside the door system. The DC electric device is electrically connected to the AC/DC converter.

The disclosure is directed to a method for supplying power to a DC load using an energy conversion system that includes first and second rectifiers and a transformer system. Each of the rectifiers contains an AC-DC converter connected to an AC grid via a separate secondary side of the transformer system. The transformer system provides a first AC voltage having a first voltage amplitude .Math..sub.1 on the first secondary side and a second AC voltage having a second voltage amplitude .Math..sub.2 on the second secondary side, wherein a value of the second voltage amplitude .Math..sub.2 exceeds a corresponding value of the first voltage amplitude .Math..sub.1. The method includes operating the first rectifier with a first non-zero power flow P.sub.1 to supply power to the DC load when an input voltage U.sub.DC,load at the input of the DC load falls below a voltage threshold value U.sub.TH: wherein a second power flow P.sub.2 through the second rectifier is suppressed, and operating the second rectifier with a second non-zero power flow P.sub.2 to supply power to the DC load when the input voltage U.sub.DC,load at the input of the DC load reaches or exceeds the voltage threshold value U.sub.TH. The application likewise discloses an energy conversion system for performing the method and an electrolysis system.

Provided is a power generation facility used in a power transmission system that charges a storage battery mounted on a moving body with power generated by the power generation facility; and feeds power from the storage battery transported by the moving body to a power receiving facility. The power generation facility includes: a power generator; and a converter that converts alternating-current power generated by the power generator to direct-current power. The power generation facility is configured to transmit the direct-current power to an outside of the facility using a cable.

A system is described that turns off a high power, power supply when a device no longer needs high power. A low power, power supply or a rechargeable battery provides power to determine when the device again needs high power. The low power supply consumes a minimum possible power when the device does not need high power and the power rechargeable battery is not charged. That is, the high power and low power, power supplies are turned on or off based on the real time power consumption need of the device and the charged state of the battery. The power need of the device is monitored by a current shunt monitoring circuit and a control signal monitoring circuit.

An electronic device includes a first switching circuit switching a power feed path between a first path for supplying first power and a second path for supplying second power, and a step-up/down circuit changing a voltage of the second power. The first switching circuit switches the power feed path to the first path when a voltage of the first path is higher than a voltage of the second path, and switches the power feed path to the second path when a voltage of the second path is higher than a voltage of the first path. The step-up/down circuit makes the voltage of the second power lower than a voltage of the first power when the first power is larger than the second power, and makes the voltage of the second power higher than the voltage of the first power when the second power is larger than the first power.

An electronic device includes a first switching circuit switching a power feed path between a first path for supplying first power and a second path for supplying second power, and a step-up/down circuit changing a voltage of the second power. The first switching circuit switches the power feed path to the first path when a voltage of the first path is higher than a voltage of the second path, and switches the power feed path to the second path when a voltage of the second path is higher than a voltage of the first path. The step-up/down circuit makes the voltage of the second power lower than a voltage of the first power when the first power is larger than the second power, and makes the voltage of the second power higher than the voltage of the first power when the second power is larger than the first power.