A device for generating a duty cycle includes a converter, a corrector, and a control circuit. The converter is configured to generate a first output signal having a duty cycle to an output terminal according to an input signal. The corrector is coupled to the output terminal, and is configured to adjust the duty cycle of the first output signal according to a control signal. The converter is coupled in parallel with the corrector and between a first power source and a second power source. The control circuit is coupled to the output terminal, and is configured to generate the control signal according to the first output signal and a reference signal.

This invention provides a power switch circuit and a power circuit using the power switch circuit. In particular, the power switch circuit includes a first reverse current monitoring circuit and a second reverse current monitoring circuit. The first reverse current monitoring circuit is coupled to a power transistor, and is configured to detect whether a reverse current flows through the power transistor to a voltage input terminal for a predetermined period of time, and only if yes, turn off the power transistor. The second reverse current monitoring circuit is coupled to the power transistor, and is configured to detect whether a reverse current flows through the power transistor to the voltage input terminal, and if yes, turn off the power transistor immediately. As such, the reverse current can be blocked in time from further flowing to the voltage input terminal, thereby avoiding a damage to the interior electronic components of the power source at the low voltage side.

The systems and methods described herein are directed towards a microgrid having modular power management units to control and regulate power to maintain a stable energy environment and provide peer-to-peer electricity sharing within the microgrid. The microgrid includes a power source to generate power for the microgrid, a source power management unit coupled to the power source to receive the power, one or more load power management units coupled to the source power management unit to receive a portion of the power and a bi-directional communication system to couple the source power management unit to the one or more load power management units to control and allocate the power from the source power management unit to the one or more load power management units.

Embodiments of the present application provide electric power supply methods and electric power supply systems related to the field of electrical energy technology. An electric power supply method includes: acquiring an electrical energy parameter of electrical energy delivered by an upstream power supply system, and determining, based on the electrical energy parameter, whether a preset power supply condition for supplying power to a downstream target power-consuming system is met; determining a target distribution port corresponding to the target power-consuming system from a plurality of preset distribution ports when the preset power supply condition is met; controlling a supply of electric power to the target power-consuming system through the target distribution port.

Embodiments of the present application provide electric power supply methods and electric power supply systems related to the field of electrical energy technology. An electric power supply method includes: acquiring an electrical energy parameter of electrical energy delivered by an upstream power supply system, and determining, based on the electrical energy parameter, whether a preset power supply condition for supplying power to a downstream target power-consuming system is met; determining a target distribution port corresponding to the target power-consuming system from a plurality of preset distribution ports when the preset power supply condition is met; controlling a supply of electric power to the target power-consuming system through the target distribution port.

The present invention relates to a load control system in which a power cable of a DC or AC is used for on/off control and dimming of connected load devices without adding significant hardware structure. The control is achieved through a change in the DC or AC bus voltage. A grid controller can perform on/off control and dimming for an entire group of connected load devices by changing the bus voltage. Connected load devices that do understand or want to make use of this feature will be unaffected. In order to reduce the effects of voltage drop, a calibration procedure is provided. The calibration procedure first triggers the connected load devices into a calibration mode and then initiates a number of predefined output level commands that allow the load devices to build an individual correction for the undesired voltage drop.

An apparatus may include a bus that electrically couples an electrical load to redundant power feeds. The apparatus may also include at least one capacitive component electrically coupled between first and second rails of the bus via both a conductive path and a resistive path that has substantially greater resistance than the conductive path. In addition, the apparatus may include a switching mechanism electrically coupled between the first and second rails of the bus that causes the capacitive component to charge through the conductive path until a threshold voltage on the first rail of the bus is reached. When the threshold voltage on the first rail of the bus is reached, the switching mechanism may close the conductive path and force the capacitive component to charge through the resistive path. Various other systems and methods are also disclosed.

An example low voltage buss system is provided. The low voltage bus system distributes low voltage DC power into the office workspace in a manner that reduces clutter and promotes customizable and efficient workspace usage. The low voltage bus system distributes low voltage DC power into the office workspace via an electrical buss having a connector at the end of the buss to distribute low voltage DC power to and throughout office workspace and, in particular, office furniture.

A feeding system feeds power from a power unit to a load via a feeding line and includes a protection device configured to operate by a current equal to or greater than a predetermined current; a monitoring unit configured to monitor whether an accident occurs in the feeding line; and a gate block unit configured to stop the feeding of the power of the power unit when the monitoring unit detects that an accident causing the protection device not to operate has occurred.

An apparatus for reducing electromagnetic interference in redundant power systems may include an inductor capable of being electrically coupled between first and second power sources and an electrical load. The apparatus may also include a first return-current path that electrically couples a return terminal of the electrical load to a return terminal of the first power source. The first return-current path may include a winding wound around a core of the inductor. The apparatus may further include a second return-current path that electrically couples the return terminal of the electrical load to a return terminal of the second power source. The second return-current path may include a winding wound around the core of the inductor. Various other apparatuses, systems, and methods are also disclosed.