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.

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.

Combination fuel cell stack and electrochemical battery system provides stable and redundant electrical power to one or more traction motors. The electrochemical battery packs comprise modules that are switched between a low-voltage parallel configuration connecting to the fuel cell stack and a high-voltage series configuration connecting to the traction motors, thereby harvesting low-voltage energy from the fuel cells and deploying that energy as high-voltage power to the motor. The plurality of electrochemical battery packs can be switched such that at least one is always connected to the traction motor for continuity of power.

Combination fuel cell stack and electrochemical battery system provides stable and redundant electrical power to one or more traction motors. The electrochemical battery packs comprise modules that are switched between a low-voltage parallel configuration connecting to the fuel cell stack and a high-voltage series configuration connecting to the traction motors, thereby harvesting low-voltage energy from the fuel cells and deploying that energy as high-voltage power to the motor. The plurality of electrochemical battery packs can be switched such that at least one is always connected to the traction motor for continuity of power.

A power management circuit comprises an energy pump, a control circuit and a power consuming circuit. The power management circuit is connected in serial with a current loop in a serial connection with a field device to cause a regulated voltage drop across the serial connection at an insertion voltage and to output an electrical power derived from the insertion voltage. The energy pump inputs at least a portion of the insertion voltage, and a feedback sense, and output a charging voltage based on the feedback sense. The charging voltage sources the electrical power output by the power management circuit. The control circuit regulates the insertion voltage by modulating the feedback sense to the energy pump, and modulates the feedback sense in response to an electrical change in the current loop. The power consuming circuit receives the electrical power from the power management circuit.

A DC-power system including a main DC bus, a power generating unit arranged to feed the main DC bus, an isolator switch arranged between the main DC bus and the power generating unit for isolating the power generating unit from the main DC bus in case of a main DC bus fault, a drive unit arranged to be fed by the main DC bus, wherein the drive unit includes a drive unit bus system, converter units connected to the drive unit bus system, and fuses arranged between the drive unit bus system and the converter units for protecting the converter units in case of a drive unit fault.

A DC-power system including a main DC bus, a power generating unit arranged to feed the main DC bus, an isolator switch arranged between the main DC bus and the power generating unit for isolating the power generating unit from the main DC bus in case of a main DC bus fault, a drive unit arranged to be fed by the main DC bus, wherein the drive unit includes a drive unit bus system, converter units connected to the drive unit bus system, and fuses arranged between the drive unit bus system and the converter units for protecting the converter units in case of a drive unit fault.

An actuator control device supplies electrical power to a plurality of actuators via a plurality of controller units consecutively disposed and connected in one direction. A power supply unit or an input/output and power supply unit is interposed between each arbitrary number of controller units from within the plurality of controller units. In a case that the power supply unit is interposed, the power supply unit supplies electrical power to the block connected on a downstream side in a connecting direction. In a case that the input/output and power supply unit is interposed, the input/output and power supply unit performs input and output of signals to and from an exterior and the block that is connected on the downstream side in the connecting direction, while also supplying electrical power to the block.

Provided is a power distribution network. The power distribution network comprises a ring-formed power line and a plurality of power nodes connected to the ring-formed power line. In addition, the power distribution network includes a plurality of circuit protection units, wherein each of the circuit protection units is provided between one of the plurality of power nodes and the ring-formed power line or on the ring-formed power line between two adjacent power nodes. The present disclosure is defined by the accompanying claims and is not limited to the particulars of the embodiments of the above detailed description.

A voltage converter system comprises a plurality of voltage conversion circuits, each of the voltage conversion circuits includes a reactor and a switching element, a controller, and a single current sensor connected with the reactors of two voltage conversion circuits and configured to be used in common by the two voltage conversion circuits in order to measure the reactor current. When only one voltage conversion circuit out of the two voltage conversion circuits is driven as an object circuit, the controller repeatedly performs a correction amount learning process. When the measured current value approaches the target value to be within a predetermined range or when the correction amount learning process has been performed a predetermined number of times, the controller changes the object circuit from the one voltage conversion circuit to the other voltage conversion circuit, and repeatedly performs the correction amount learning process.