Huawei Technologies Co., Limited

Weiliang Shu

Wingto Fan

Yanding Liu

Shuangquan Chen

Qitang Liu

Yunhe Mao

Furong Xiao

Hongcheng You

A resonant power supply, a primary-side feedback excitation power supply controller, a method, and a control apparatus are disclosed. In the resonant power supply, a bridge circuit is electrically connected to a power supply. The bridge circuit is configured to convert, based on a drive signal, a direct current provided by the power supply into a square wave signal. An LC series resonant network is electrically connected to the bridge circuit and a primary-side winding. The LC series resonant network is configured to convert the square wave signal into an alternating current, and output the alternating current to the primary-side winding. The alternating current includes an input voltage Vand an input current I.

Resonant power supply, primary-side feedback excitation power supply controller, method, and control apparatus

A power regulation method, apparatus, and device for NFC communication and NFC charging are disclosed. The apparatus includes: an NFC power converter, an NFC coil, an NFC circuit, a controller, and a power regulator. The NFC power converter is configured to connect to a direct-current power supply and generate a high-frequency alternating-current output. The NFC coil is configured to generate/receive an NFC high-frequency magnetic field and transmit/receive NFC power or an NFC signal. The NFC circuit is connected to the NFC power converter and is configured to transmit/receive the high-frequency alternating-current output. The controller is configured to generate different power control signals based on different operating modes of an NFC apparatus.

Power regulation method, apparatus, and device for near field communication

A terminal device and a method for controlling the terminal device are provided. The terminal device includes a display screen, a housing, a middle frame and a transmitting circuit. The transmitting circuit is disposed on a side of the middle frame and faces the housing. The transmitting circuit includes a matching network and a transmitting coil connected to the matching network. The matching network is configured to perform impedance matching on a received alternating current power signal and send the received alternating current power signal to the transmitting coil. The matching network includes a parallel resonant capacitor connected in parallel to the transmitting coil. The transmitting circuit further includes a resistance switching circuit connected in series to the parallel resonant capacitor.

Terminal device and method for controlling terminal device

An input end of a first power conversion circuit of the system is connected to a power supply, and an output end of the first power conversion circuit is connected to a stator winding of an electrical excitation motor. An input end of a second power conversion circuit is connected to the power supply, and an output end of the second power conversion circuit is connected to a primary side of an excitation transformer. The excitation transformer transmits energy required by an excitation winding of the electrical excitation motor from a stator to a rotor. A first controller controls the first power conversion circuit to inject a current excitation into the stator winding, so that a current is generated on the excitation winding. A detection circuit obtains a response signal of the primary side of the excitation transformer and sends the response signal to a second controller.

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Dongguan, China

Weiliang Shu