An apparatus may include a plurality of power inputs configured to receive direct current from a plurality of external power adapters that convert alternating current to direct current. The plurality of external power adapters may include a primary external power adapter and at least one backup external power adapter. The apparatus may also include a power output configured to provide direct current to a device. In addition, the apparatus may include a switching mechanism that, when the primary external power adapter is operational, supplies direct current from the primary external power adapter to the power output and, when the primary external power adapter fails, supplies direct current from the backup external power adapter to the power output. Various additional apparatuses, systems, and methods are also disclosed.

A switching control circuit for controlling a multi-channel switching circuit having switching circuits, input terminals coupled to input voltage signals, and an output terminal for providing an output voltage signal, can include: a logic control circuit configured to receive an external operation signal and a first single pulse signal, and to generate an enable signal, a trigger signal, and feedback control signals; a reference voltage regulation circuit configured to receive the enable signal, the trigger signal, and a maximum one of the input voltage signals, and to generate a reference voltage signal; and feedback circuits corresponding to the switching circuits, where the plurality of feedback circuits are configured to receive the feedback control signals, a minimum one of two input voltage signals that are participating in the switching operation, the reference voltage signal, and the output voltage signal, and to generate switching control signals for controlling the switching circuits.

A switching control circuit for controlling a multi-channel switching circuit having switching circuits, input terminals coupled to input voltage signals, and an output terminal for providing an output voltage signal, can include: a logic control circuit configured to receive an external operation signal and a first single pulse signal, and to generate an enable signal, a trigger signal, and feedback control signals; a reference voltage regulation circuit configured to receive the enable signal, the trigger signal, and a maximum one of the input voltage signals, and to generate a reference voltage signal; and feedback circuits corresponding to the switching circuits, where the plurality of feedback circuits are configured to receive the feedback control signals, a minimum one of two input voltage signals that are participating in the switching operation, the reference voltage signal, and the output voltage signal, and to generate switching control signals for controlling the switching circuits.

The invention relates to a power management system, comprising: a power source; a source of renewable energy; a power converter; a first selection means arranged to connect the input of the power converter either to the power source or to the source of renewable energy; a second selection means arranged to connect the outlet of the power converter either to the power source or to a system for storing power; and a means for synchronizing the first selection means and the second selection means, which operates according to pre-established operation rules.

The invention relates to a power management system, comprising: a power source; a source of renewable energy; a power converter; a first selection means arranged to connect the input of the power converter either to the power source or to the source of renewable energy; a second selection means arranged to connect the outlet of the power converter either to the power source or to a system for storing power; and a means for synchronizing the first selection means and the second selection means, which operates according to pre-established operation rules.

A power supply system comprising a power source apparatus connected at a junction point P1 to a system power source line L0 provided between a system power source and a load device, and a power source apparatus connected at a junction point P2 to the system power source line L0. The power supply system includes a current sensor CT2-1 provided on the system power source line (L0) between the system power source and the junction point P1, a current sensor CT2-2 provided on the power source apparatus power source line L1 between the power source apparatus and the junction point P1, and a current sensor CT2-3 provided on the system power source line L0 between the junction point P1 and the junction point P2. The power source apparatus controls the output of power from the power source apparatus, on the basis of the outputs from current sensors CT2-1, CT2-2, CT2-3.

A micro grid system comprises an adapter, a power controller, and secondary energy source. The adapter is in communication with an electric grid and configured to connect and disconnect a connection between the electric grid and a micro grid. The power controller is in communication with the adapter and configured to receive first AC power from the electric grid via the adapter, obtain grid information, and control the adapter to connect and disconnect the connection between the electric grid and the micro grid. The power controller controls the adapter to disconnect the connection in response to determining that the electric grid is abnormal based on the grid information. The secondary energy source is in communication with the power controller and is configured to generate DC power and to supply the DC power to the power controller.

A micro grid system comprises an adapter, a power controller, and secondary energy source. The adapter is in communication with an electric grid and configured to connect and disconnect a connection between the electric grid and a micro grid. The power controller is in communication with the adapter and configured to receive first AC power from the electric grid via the adapter, obtain grid information, and control the adapter to connect and disconnect the connection between the electric grid and the micro grid. The power controller controls the adapter to disconnect the connection in response to determining that the electric grid is abnormal based on the grid information. The secondary energy source is in communication with the power controller and is configured to generate DC power and to supply the DC power to the power controller.

In a method for superimposed conveyance of data and electrical power, a first switch can cycle to convey the electric power and data from a first device. Binary digits of the data from the first device can be represented by transitions, of a voltage at a node of a second device, between a first voltage and a second voltage. A second switch can cycle to convey data from the second device. Binary digits of the data from the second device can be represented by transitions, of a current through a component of the first device, between being less than a threshold and being greater than the threshold. A voltage regulator of the second device can provide, in response to the voltage at the node being within a range of voltages that includes the first voltage and the second voltage, the electrical power to one or more components.

In a method for superimposed conveyance of data and electrical power, a first switch can cycle to convey the electric power and data from a first device. Binary digits of the data from the first device can be represented by transitions, of a voltage at a node of a second device, between a first voltage and a second voltage. A second switch can cycle to convey data from the second device. Binary digits of the data from the second device can be represented by transitions, of a current through a component of the first device, between being less than a threshold and being greater than the threshold. A voltage regulator of the second device can provide, in response to the voltage at the node being within a range of voltages that includes the first voltage and the second voltage, the electrical power to one or more components.