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In this paper, Bluetooth is used as the data transmission mode to achieve the connection between the power transmitter and the mobile phone in the wireless charging system. A Bluetooth module is added to the power transmitter to send the relevant data to the mobile phone in the process of wireless power transfer. Both the power transmitter and the power receiver are designed based on the Qi standard...
The intelligent control design and realization proposal of an AC contactor with wide-range input voltage are introduced in this paper, the hardware and software design are emphasized especially. By using power electronic device MOSFET to control and adjust the voltage on the contactor's coil self-adaptively in PWM(Pulse Width Modulation) mode, this kind of contactor can work reliably and stably with...
This paper describes a model of a 75 MVA and 150 kV synchronous machine (powerformer), which can be used to simulate internal fault waveforms for power system protection studies. The method employs a direct phase representation considering the cable capacitance. A method to calculate the inductance and its magnetic axis location of the faulty path is outlined. The machine equations are then solved...
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