A system for supplying adapted power to an electronic device with a reduced level of power consumption when the device is not in use includes a first power supplying module, a control module coupled to the first power supplying module, and an MCU coupled to the control module and coupled to the electronic device. The MCU is configured to switch on the first power supplying module when the first power supplying module is in a normal state, the normal state being an AC power supply coupled to the first power supplying module. The MCU detects an instant mode of the electronic device and outputs a first signal to the control module when the electronic device is in a standby mode. The control module is configured to switch off the first power supplying module when the first signal is received. A power supplying method is further provided.

A ground power supplying apparatus provided with a power transmission apparatus having a resonance circuit and transmitting power to the vehicle and a control device shifting a state of the ground power supplying apparatus to a standby state when a predetermined suspension condition stands if the state of the ground power supplying apparatus is a main power transmission state or a power transmission active state and shifting a state of the ground power supplying apparatus to the power transmission active state when the suspension condition no longer stands if the state of the ground power supplying apparatus is the standby state.

Provided is an energy storage system including: an external power input unit receiving uninterrupted external power; a battery storing electric power; a power adjustment device adjusting the uninterrupted external power and the power of the battery, the battery including a battery module with one or more battery cells; a battery management system; a main switch disposed on a power path between the battery module and the battery management system and a path between the battery module and the power adjustment device; and a wake-up relay receiving a wake-up signal from the power adjustment device and transmitting the wake-up signal to the battery management system.

Embodiments include redundant power supplies and method for fault detection in a redundant power supply. Aspects include monitoring a voltage at local output nodes of each phase of the redundant power supply, wherein the local output nodes are each connected to an output bus of the redundant power supply via a feedback path. Aspects also include creating an alert that a phase associated with the local output node has failed based on a determination that the voltage at the local output node is within a fault range.

A battery saving system (1) for an electrically powered mobility device (13) comprising a battery (15) and a drive control system (16) configured to be powered by the battery, wherein the battery saving system (1) comprises: a current monitoring circuit (3) configured to monitor a load current provided by the battery (15), wherein the current monitoring circuit (3) is configured to determine whether a load current magnitude is below a load current threshold level, a timer circuit (7) having a counter configured to successively count as long as the load current magnitude level is below the load current threshold level, and to reset the counter in the event that the load current level magnitude exceeds the current threshold level, and a disconnecting switch (9) configured to be operated between an open state and a closed state, wherein the timer circuit (7) is configured to trigger the disconnecting switch (9) to obtain the open state when the counter has reached a predetermined number to thereby disconnect the battery (15) from the drive control system (16).

A case (100) is provided for housing and charging one or more wireless devices (180), such as wireless earbuds. The case (100) includes capacitive sensing circuitry (120) for detecting whether the wireless devices (180) are positioned inside the case (100) based on a capacitance of the wireless devices (180). The case (100) also includes a transceiver (150) for transmitting data to and receiving data from the wireless devices (180). When the wireless devices (180) are positioned inside the case (100), an electrical component (110) inside the case operatively connects the capacitive sensing circuitry (120) and the transceiver (150) of the case (100) to the wireless devices (180). The case (100) further includes one or more processors (140) for controlling the capacitive sensing circuitry (120), the transceiver (150), and the electrical component (110).

Provided is an electronic electricity meter. Since inductive power from a magnetic field surrounding a transmission line is generated using a current transformer, and the inductive power is stored to be used as a driving power source for the electricity meter, the present invention can prevent power from being consumed by the electricity meter in an unloaded state. In addition, the present invention can protect the electricity meter from a surge voltage, lightening, or the like by insulating the transmission line and internal components from each other. In addition, when a power cut-off instruction is received from the electrical energy measurement server, the present invention can cut off power supply to a load by turning off a switch in a power source cut-off unit installed on the transmission line, and when a power supply instruction is received from the server, can remotely control power supply to the load.

A respiratory therapy device generates a flow of breathable gas for therapy. The apparatus may include a flow generator in a housing to generate the breathable gas flow. The flow generator may have an operating voltage for such operations. The device may include a battery pack that is engageable with the housing. The battery pack may be configured to power the flow generator and may include a stand-by circuit configured to switch between stand-by and operating modes. The stand-by circuit may be configured to provide a stand-by operations voltage while in the stand-by mode that is less than an operating voltage of the flow generator and may be configured to detect current demand of the flow generator with the stand-by operations voltage while in stand-by mode such as for enabling an increase voltage from the battery pack to produce the operating voltage in the operating mode for the flow generator.

A power supply system and operating method thereof are provided. The power supply system includes a power generation circuit and a discharge circuit. The power generation circuit is configured to provide an output voltage at an output end when a power is started, and stop providing the output voltage when the power is off. The discharge circuit includes a capacitor, a comparison circuit, and a switch circuit. The comparison circuit is configured to compare a voltage at a detection end and the output voltage at the output end to generate a comparison result. The switch circuit is configured to discharge the output end according to the comparison result when the power is off. The power supply system and an operating method thereof provided by the disclosure can reduce loss when the power is off, so as to improve the operation quality of the circuit.

The present disclosure includes a system including a power supply unit that provides an output power and a supply status indicating whether the power supply unit is receiving input power. An electronic circuit is coupled to the power supply unit to receive the output power and a standby control circuit controls turning on and off the power supply unit. A power harvesting circuit generates standby power from the supply status and provides the standby power to power the standby control circuit.