A control unit controls a reader/writer to generate a vehicle ID read signal that is formed of a high frequency signal and used to read a vehicle ID recorded in an ID circuit, and supply the signal to a high-pass filter. The read signal or a write signal formed of the high frequency signal is superimposed on a power supply line and supplied to the high-pass filter. The high-pass filter supplies the vehicle ID read signal formed of the high frequency signal to the ID circuit. On the basis of the read signal, the ID circuit reads the vehicle ID stored in an IC built in the own circuit and transmits it as a response signal to a charger along a reverse path. An authentication part of the control unit turns on a selector switch when the vehicle ID being the response signal is determined to be legitimate.

A control unit controls a reader/writer to generate a vehicle ID read signal that is formed of a high frequency signal and used to read a vehicle ID recorded in an ID circuit, and supply the signal to a high-pass filter. The read signal or a write signal formed of the high frequency signal is superimposed on a power supply line and supplied to the high-pass filter. The high-pass filter supplies the vehicle ID read signal formed of the high frequency signal to the ID circuit. On the basis of the read signal, the ID circuit reads the vehicle ID stored in an IC built in the own circuit and transmits it as a response signal to a charger along a reverse path. An authentication part of the control unit turns on a selector switch when the vehicle ID being the response signal is determined to be legitimate.

A power management system includes an electrical power supply input configured to be coupled to an electrical power supply, a first power supply bus bar coupled to the power supply input, a power management device coupled to the first power supply bus bar, at least one primary electrical equipment including a primary load being coupled in parallel to the power management device, and at least one secondary electrical equipment including a secondary load being coupled in parallel to the power management device. The power manager device is configured to supply electrical power to the at least one secondary electrical equipment, to supply electrical power to the at least one primary electrical equipment, and to deactivate the power supply to the at least one secondary electrical equipment, as long as the at least one primary electrical equipment is supplied with electrical power.

Electrical distribution system for an aircraft comprising at least one electrical supply path comprising at least one power unit capable of opening or closing the connection between at least one electrical energy source and at least one device of the aircraft. The system comprises protection cards (2b, 2n) each comprising at least two microcontrollers each capable of sending a command to each power unit of the electrical supply paths protected by each protection card and, among the set of microcontrollers of the protection cards, at least two microcontrollers are provided with a communication and computation function with all of the microcontrollers of the protection cards (2b, 2n).

Electrical distribution system for an aircraft comprising at least one electrical supply path comprising at least one power unit capable of opening or closing the connection between at least one electrical energy source and at least one device of the aircraft. The system comprises protection cards (2b, 2n) each comprising at least two microcontrollers each capable of sending a command to each power unit of the electrical supply paths protected by each protection card and, among the set of microcontrollers of the protection cards, at least two microcontrollers are provided with a communication and computation function with all of the microcontrollers of the protection cards (2b, 2n).

An apparatus leverages the existing power interconnect for DC power delivery by including a persistent DC power module into a power panel, thereby enabling a more efficient use of the energy. The persistent DC power module includes, in part, a control unit which is adaptive to the variations and availability of the external DC power source to ensure a constant and consistent delivery of DC voltage. The apparatus minimizes energy waste and e-waste, and is compatible with the existing legacy AC infrastructure.

A multi-power supply system and a control method thereof are disclosed. The multi-power supply system includes a first power-supply unit, a second power-supply unit, a switching unit, and a control unit. The power-supply unit comprises a reverse current prevention circuit, a converter circuit, and an input circuit. The switching unit is electrically coupled to the first power-supply unit and the second power-supply unit. When the first and second input circuits are in normal operation, the control unit controls the switching unit to be turned off to allow the first power-supply unit and the second power-supply unit to supply power to a load. When one of the first and second input circuits is in abnormal operation, the control unit controls the switching unit to be turned on. The switching unit cooperates with the first and second reverse current prevention circuits to achieve the switching of input.

A multi-power supply system and a control method thereof are disclosed. The multi-power supply system includes a first power-supply unit, a second power-supply unit, a switching unit, and a control unit. The power-supply unit comprises a reverse current prevention circuit, a converter circuit, and an input circuit. The switching unit is electrically coupled to the first power-supply unit and the second power-supply unit. When the first and second input circuits are in normal operation, the control unit controls the switching unit to be turned off to allow the first power-supply unit and the second power-supply unit to supply power to a load. When one of the first and second input circuits is in abnormal operation, the control unit controls the switching unit to be turned on. The switching unit cooperates with the first and second reverse current prevention circuits to achieve the switching of input.

Disclosed examples include redundant Power over Ethernet (PoE) systems, powered device (PD) controllers and methods in which a first PD controller sends a signal to indicate to the other PD controllers that the first PD controller is powered, and a second PD controller newly connected or reconnected to a corresponding power sourcing equipment (PSE) refrains from turning off a shared DC-DC converter, and the second PD controller waits to allow an inrush current delay of the corresponding PSE to complete before allowing current flow between the DC-DC converter and the corresponding PSE, and the second PD controller selectively provides a signal to request an application circuit powered by the DC-DC converter to temporarily reduce its power consumption below a predetermined value if the corresponding PSE is configured to provide no more than the predetermined value of power.

Disclosed examples include redundant Power over Ethernet (PoE) systems, powered device (PD) controllers and methods in which a first PD controller sends a signal to indicate to the other PD controllers that the first PD controller is powered, and a second PD controller newly connected or reconnected to a corresponding power sourcing equipment (PSE) refrains from turning off a shared DC-DC converter, and the second PD controller waits to allow an inrush current delay of the corresponding PSE to complete before allowing current flow between the DC-DC converter and the corresponding PSE, and the second PD controller selectively provides a signal to request an application circuit powered by the DC-DC converter to temporarily reduce its power consumption below a predetermined value if the corresponding PSE is configured to provide no more than the predetermined value of power.