A direct current fast charge (DCFC) system and associated method that lower standby power dramatically when the DCFC system is not in operation, and that provide a reset capability for communication needs. The DCFC system utilizes an appropriate load disconnection switch and an associated control and communication circuit, timer circuit, and automatic turn on system. This improves the reliability of the electronics by removing voltage stress during the standby mode. The DCFC system prevents energy waste, and therefore provides a “green” alternative to conventional DCFC systems.

A direct current fast charge (DCFC) system and associated method that lower standby power dramatically when the DCFC system is not in operation, and that provide a reset capability for communication needs. The DCFC system utilizes an appropriate load disconnection switch and an associated control and communication circuit, timer circuit, and automatic turn on system. This improves the reliability of the electronics by removing voltage stress during the standby mode. The DCFC system prevents energy waste, and therefore provides a “green” alternative to conventional DCFC systems.

The hydrogen production apparatus includes: a rectifier supplied with first electrical power from outside, and that outputs direct-current second electrical power; an electrolyzer supplied with the second electrical power and that carries out electrolysis of an alkaline aqueous solution; a pure water tank that retains a pure water; a pure water pipe connected between the pure water tank and an electrolyzer, allowing the pure water to be distributed from the pure water tank to the electrolyzer; an inert gas cylinder that contains an inert gas; and a first valve connected between the inert gas cylinder and the pure water pipe, is the first valve being closed when the first electrical power is supplied, and being open when the first electrical power is not supplied. The inert gas is introduced into the pure water pipe by opening the first valve.

The hydrogen production apparatus includes: a rectifier supplied with first electrical power from outside, and that outputs direct-current second electrical power; an electrolyzer supplied with the second electrical power and that carries out electrolysis of an alkaline aqueous solution; a pure water tank that retains a pure water; a pure water pipe connected between the pure water tank and an electrolyzer, allowing the pure water to be distributed from the pure water tank to the electrolyzer; an inert gas cylinder that contains an inert gas; and a first valve connected between the inert gas cylinder and the pure water pipe, is the first valve being closed when the first electrical power is supplied, and being open when the first electrical power is not supplied. The inert gas is introduced into the pure water pipe by opening the first valve.

A light emitting diode (LED) lighting fixture (2), where the LED lighting fixture (2) is a discrete element including three external pins, an LED same-direction parallel circuit and a rectifier circuit are integrated inside the discrete element, an input end of the rectifier circuit is connected to the three external pins of the discrete element, and an output end of the rectifier circuit is connected to the LED same-direction parallel circuit. It is further provided an LED illumination system using the foregoing LED lighting fixture (2), including: a toroidal transformer (1) including at least one group of input ends and at least one group of output ends, each group of LED lighting fixtures (2) are directly connected to a group of output ends of the toroidal transformer. The LED lighting fixture has a simple structure and low manufacturing and use costs.

A light emitting diode (LED) lighting fixture (2), where the LED lighting fixture (2) is a discrete element including three external pins, an LED same-direction parallel circuit and a rectifier circuit are integrated inside the discrete element, an input end of the rectifier circuit is connected to the three external pins of the discrete element, and an output end of the rectifier circuit is connected to the LED same-direction parallel circuit. It is further provided an LED illumination system using the foregoing LED lighting fixture (2), including: a toroidal transformer (1) including at least one group of input ends and at least one group of output ends, each group of LED lighting fixtures (2) are directly connected to a group of output ends of the toroidal transformer. The LED lighting fixture has a simple structure and low manufacturing and use costs.

A power supply device for converting an AC power input into a DC power output comprises a rectifier module connected to the AC power input for producing rectified power; a final stage DC-DC converter for producing the DC power output; and one or more smoothing stages provided between the rectifier module and the final stage DC-DC converter to smooth the rectified power. There is an initial DC-DC converter module is provided between the rectifier and one of the smoothing stages to lower the voltage range of the output signal from the rectifier. The lowered voltage range of the rectified power is provided directly to the final stage DC-DC converter, without a power storage device storing the lowered voltage range rectified power.

A power supply device for converting an AC power input into a DC power output comprises a rectifier module connected to the AC power input for producing rectified power; a final stage DC-DC converter for producing the DC power output; and one or more smoothing stages provided between the rectifier module and the final stage DC-DC converter to smooth the rectified power. There is an initial DC-DC converter module is provided between the rectifier and one of the smoothing stages to lower the voltage range of the output signal from the rectifier. The lowered voltage range of the rectified power is provided directly to the final stage DC-DC converter, without a power storage device storing the lowered voltage range rectified power.

The hydrogen production apparatus includes: a rectifier supplied with first electrical power from outside, and that outputs direct-current second electrical power; an electrolyzer supplied with the second electrical power and that carries out electrolysis of an alkaline aqueous solution; a pure water tank that retains a pure water; a pure water pipe connected between the pure water tank and an electrolyzer, allowing the pure water to be distributed from the pure water tank to the electrolyzer; an inert gas cylinder that contains an inert gas; and a first valve connected between the inert gas cylinder and the pure water pipe, is the first valve being closed when the first electrical power is supplied, and being open when the first electrical power is not supplied. The inert gas is introduced into the pure water pipe by opening the first valve.

The hydrogen production apparatus includes: a rectifier supplied with first electrical power from outside, and that outputs direct-current second electrical power; an electrolyzer supplied with the second electrical power and that carries out electrolysis of an alkaline aqueous solution; a pure water tank that retains a pure water; a pure water pipe connected between the pure water tank and an electrolyzer, allowing the pure water to be distributed from the pure water tank to the electrolyzer; an inert gas cylinder that contains an inert gas; and a first valve connected between the inert gas cylinder and the pure water pipe, is the first valve being closed when the first electrical power is supplied, and being open when the first electrical power is not supplied. The inert gas is introduced into the pure water pipe by opening the first valve.