Elementech International Co., Ltd.

Ming-Han Nieh

A medium- and high-power frequency adjustable digital power system includes a switch switching circuit, an output sampling circuit, and a microcontroller. The switch switching circuit has a plurality of switches, receives an AC input power source and converts the AC input power source into an output power source. The output sampling circuit receives an output voltage and an output current of the output power source. The microcontroller receives the output voltage and the output current, and generates a plurality of control signals according to power information calculated by the output voltage and the output current to correspondingly control turning on and turning off the switches.

Medium- and high-power frequency-adjustable digital power system

An active power over Ethernet control apparatus with low power consumption includes a control unit and a low-power-consumption control circuit. The control unit is installed inside a power sourcing equipment. The low-power-consumption control circuit includes a detecting circuit, a handshaking circuit, and a self-holding circuit. The detecting circuit provides a first control signal. The handshaking circuit receives the first control signal and provides a second control signal. The self-holding circuit receives the second control signal. When a powered device is not connected to the power sourcing equipment, a power-supplying path from the power sourcing equipment to the powered device is disconnected. When the powered device is connected to the power sourcing equipment, the handshaking circuit is controlled by the first control signal and the self-holding circuit is controlled by the second control signal to make the power-supplying path be connected.

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Taipei, Taiwan

Ming-Han Nieh