Abstract: An apparatus includes a pulse-width modulation (PWM) generator configured to generate a PWM signal for controlling a power switch of a power converter, a bias switch and a bias capacitor connected in series and coupled to a magnetic winding of the power converter and a comparator having a first input connected to the bias capacitor, a second input connected to a predetermined reference and an output configured to generate a signal for controlling the bias switch to allow a magnetizing current from the magnetic winding to charge the bias capacitor when a voltage across the bias capacitor is less than the predetermined reference.

Abstract: A method includes detecting a voltage signal of a three-level power converter, the voltage signal indicative of a capacitor voltage balancing in the three-level power converter, and dynamically adjusting an operating variable to adjust the voltage signal until the capacitor voltage balancing in the three-level power converter satisfies a criteria.

Abstract: A system includes a first power conversion device connected to a first power source, a first isolated power conversion device connected to the first power source, and a second power conversion device connected to the first isolated power conversion device, wherein outputs of the first power conversion device and outputs of the second power conversion device are connected in series, and series-connected outputs of the first power conversion device and the second power conversion device are configured to drive a motor.

Abstract: A system includes a first switched-capacitor converter including a plurality of switches connected in series, a second switched-capacitor converter, and a third switched-capacitor converter connected in parallel with the second switched-capacitor converter between a common node of two switches of the plurality of switches and a load, the second switched-capacitor converter and the third switched-capacitor converter both including inductors.

Abstract: A remote control water outlet device comprises a faucet and a control assembly. The faucet is connected to one or more water inlet pipes and a water outlet pipe assembly, and the control assembly is separated from the faucet by a distance. The control assembly controls the water outlet pipe assembly to be opened and to be closed. The water outlet pipe assembly comprises a water inlet passage and a water outlet passage in communication with the control assembly. The control assembly comprises a pressure relief cavity in communication with the water inlet passage and a sealing gasket configured to abut and block inlets of the water outlet passage due to being subjected to water pressure in the pressure relief cavity. The sealing gasket comprises a control hole configured to be opened to enable the pressure relief cavity be in communication with the water inlet passage.

Abstract: A bidirectional power conversion system includes an isolated power converter having a first input connected to an output of a diode rectifier and a second input connected to an output of a power factor correction device. The power conversion system further comprises a plurality of switches and a plurality of diodes configured such that the plurality of switches and the plurality of diodes form the diode rectifier and the power factor correction device when the system is configured to deliver power from an AC power source to a DC load and the plurality of switches forms an inverter when the system is configured to deliver power from a DC power source to an AC load.

Abstract: Disclosed herein is a faucet comprising a faucet housing configured as a tubular member with a cavity and a faucet body that includes a head and a conduit. A water inlet end of the head is connected to the conduit. A first support is received in the cavity and located in a water outlet end of the faucet housing. The head is freely received in the first support and a purified water pipe is embedded detachably into the first support. A mounting seat is configured to function as a water distributor and is detachably engaged with the faucet housing. A valve cartridge is received in the mounting seat and configured to control the shut off of the conduit and the purified water pipe, and to separate the flow path of the tap-water and the flow path the purified water.