Huawei Digital Power Technologies Co., Ltd.

Remarkable As

Huawei Technologies Co., Limited

Peng Shuai

Xiaofei Zhang

Zhuyong Huang

Gaute Wiig Nordby

Liang Xiong

Xiaoqing Hu

Xian Dong Guo

Vegard Bakke Svendsen

Espen Lie

Wen Bin Zhou

Peiguo Liu

Anna Karoline Øren Lillerud

Zhou Shu

Jin Qian

Lars Årtun

Embodiments of the invention provide a pen-stylus that comprises a first antenna having a hemispherical shape at a proximal end of the pen-stylus where the pen-stylus engages with a display of a tablet device. The pen-stylus also includes a second antenna, wherein the first antenna and the second antenna communicate with the tablet device to enable a pen-stylus user to draw on the display of the tablet device. The pen-stylus additionally includes an insulating material between the first antenna and the second antenna that prevents interference between the first antenna and the second antenna. In some embodiments, the first antenna and the insulating material reside in a marker tip attached to the pen-stylus, the marker tip transmits axial forces received by engagement of the pen-stylus with the display on the tablet to a force sensor. The pen-stylus further includes a force sensor that converts axial forces received from the marker tip into an electrical signal and transmits the electrical signal to the tablet by at least one of the first antenna and the second antenna.

Marker writing system

Embodiments of the invention provide a removable marker tip configured for application with an active pen-stylus. The removable marker tip comprises an antenna and an insulator and is designed to be held onto the pen-stylus' writing shaft by a set of crush ribs fitted into a posterior recess on the removable marker tip. The removable marker tip is designed to be a consumable part to improve the paper feeling received by users of the pen-stylus as they draw on the display of a tablet device. The removable marker tip is further designed to be hand-removable by users of the pen-stylus.

Replaceable conductive marker tip

Embodiments of the invention provide a plurality of safety features for a pen-stylus. The pen-stylus may comprise a writing shaft that receives mechanical input forces as a user engages the pen-stylus on a display of a tablet device, a force sensor that translates mechanical input forces received from the writing shaft into electrical ones for operation by electronics in the pen-stylus; and a writing shaft impact shock absorber that receives heavy forces imparted to the pen-stylus to shield the force sensor from receiving such heavy forces. The heavy forces impacting the pen-stylus may arise from the pen-stylus being dropped onto a hard surface.

Marker protection system

This application provides a voltage sampler and a solid-state transformer. The voltage sampler includes a conductive housing, at least one sampling board located inside the housing, and a conducting layer. Each sampling board includes at least two resistors and a voltage input end. The resistors in the sampling board are electrically connected in sequence in the direction from a first end to a second end. The resistor at the first end is electrically connected to the voltage input end. The resistor at the second end is electrically connected to the housing, and the housing is electrically connected to a fixed potential end. The conducting layer is disposed between the at least one sampling board and the housing in the voltage sampler. The conducting layer is electrically connected to a resistor in the sampling board.

Voltage sampler and solid-state transformer

This application discloses a power electronic transformer wherein each phase includes a plurality of power conversion modules. Each power conversion module includes a rectifier AC/DC circuit, a direct current bus capacitor, and a direct current-direct current DC/DC circuit. In each power conversion module, an output end of the AC/DC circuit is connected to an input end of the DC/DC circuit; the direct current bus capacitor is connected in parallel to the output end of the AC/DC circuit; and input ends of all the AC/DC circuits are connected in series, and output ends of all the DC/DC circuits are connected in parallel. The power electronic transformer includes a relatively small quantity of power conversion modules, thereby reducing occupied space and costs.

Power electronic transformer and power supply system

A power system, related to the field of electronic power. The power system includes a centralized controller and three power modules. Each phase of an alternating current power supply is connected to one power module, and an input end of each power module is connected to one phase of the alternating current power supply. Each power module includes a low voltage controller and at least two power units. Each power unit includes a unit controller. The centralized controller is connected to each low voltage controller by using a bus. The centralized controller sends a control signal to each unit controller by using each low voltage controller, to control the unit controller and/or a power conversion circuit. The power system can implement hot swap of the power module and improve on-site operation reliability.

Power system, data center, and charging device

Embodiments of this application provide a power conversion circuit. The power conversion circuit includes at least one first power conversion unit connected in series to a first phase line, at least one second power conversion unit connected in series to a second phase line, at least one third power conversion unit connected in series to a third phase line, a plurality of first start circuits connected in series to the first phase line, and a plurality of second start circuits connected in series to the second phase line. Each first start circuit includes a first relay and a first resistor that are connected in parallel, and first relays in all the first start circuits are sequentially closed after the power conversion circuit is powered on, to start the power conversion circuit. Each second start circuit includes a second relay and a second resistor that are connected in parallel.

Growing community of inventors

Shenzhen, China

Peng Shuai