Delta Electronics, Inc.

Yun-Chi Hung

Chih-Hung Hsiao

Cheng-Chieh Chan

Jo-Fang Wei

Cheng-Yu Lai

A power conversion apparatus and a controlling method thereof are disclosed. The power conversion apparatus is applied with a power generation apparatus, which outputs a first signal. The power conversion apparatus includes a conversion-sensing circuit, a control signal generating circuit and a switching circuit. The conversion-sensing circuit converts the first signal into a second signal, and senses at least a voltage waveform change of the second signal to generate a time interval. The control signal generating circuit is electrically connected with the conversion-sensing circuit and outputs a control signal according to the time interval. The switching circuit is electrically connected with the power generation apparatus and the control signal generating circuit, and has a plurality switching elements. The switching circuit receives the first signal and conducts one of the switching elements according to the control signal so as to convert the first signal and output an output signal.

Power conversion apparatus and controlling method thereof

A wind-power generator control system is provided. The wind-power generator control system includes a wind turbine, a power generator, a normally closed relay, and a control unit. The wind-power generator has a first output terminal and a second output terminal, and outputs a power output via the first and second output terminal when the wind turbine rotates. The normally closed relay is connected between the first and second output terminals. The control unit transmits a control signal to the normally closed relay by grid power. Also, when the normally closed relay does not receive the control signal, the first output terminal short-circuits the second output terminal by the normally closed relay for protecting the wind-power generator. When the normally closed relay receives the control signal, the first output terminal open-circuits the second output terminal by the normally closed relay for providing the power output.

Wind-power generator control system, and method

A power transforming apparatus implements a transformation of an energy signal and comprises a control unit, a pulse width modulation (PWM) unit, a transformation unit, and a slope compensation unit. The control unit outputs a target power signal. The PWM unit is coupled with the control unit and generates a switch signal. The transformation unit is coupled with the PWM unit, and implements a power transforming of the energy signal to output an energy transformation signal according to the switch signal. The slope compensation unit is coupled with the control unit and the PWM unit, and implements a slope compensation, according to the target power signal and a feedback signal, to output a compensation signal to the PWM unit. The switch signal is generated according to the target power signal and the compensation signal.

Power transforming apparatus with digital control unit

A control method for a wind power generating system includes the following procedures. When a rotational speed control condition is satisfied, a wind turbine is switched to operate under a rotational speed control mode to limit the electricity power by a maximum power point shifting manner. When a speed of an external wind is greater than a predetermined wind speed, the wind turbine is switched to operate under a safety mode to decrease a rotational speed of the wind turbine by a maximum torque extraction manner to protect the wind power generating system. A wind power generating system is also disclosed herein.

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Taoyuan Hsien, Taiwan

Yun-Chi Hung