Hangzhou Wormhole Import and Export Trading Co., Ltd.

Zhejiang Yuanyi Household Group Co., Ltd.

Altenergy Power System, Inc.

State Grid Huzhou Power Supply Company

Zhejiang Tailun Power Group Co., Ltd.

Jian Wu

Yuhao Luo

Jing Xu

Zhen Wang

Xun Wang

Yongsheng Xu

Weixun Qin

Xiaobin Shen

Jie Chai

Yongchun Yang

Biaojie Qi

Xinlong Wu

Shijun Chen

Size Zhang

Hong Ding

Xiaoxiao Wu

Portable tattoo printer

A three-phase inverter and a control method therefor are provided. Resonant capacitors are provided between the midpoints of three bridge arms and the positive and negative poles of a DC bus to constitute resonant units with output inductors, so as to establish a resonant network for the implementation of soft switching, without adding a switching transistor. Compared with the soft-switching of the three-phase inverter in the conventional technology, circuit devices are saved, the control process is simplified, and system hardware and software overheads are reduced. By controlling the three-phase inverter to operate in a continuous mode, the switching loss of the switching transistor and the conduction loss of a flyback diode in the switching transistor are reduced, the conversion efficiency is improved, the electromagnetic noise caused by the switching transistor is reduced, and high-quality grid currents are output.

Three-phase inverter and control method for same

Wireless power supply tattoo pen

Tattoo pen

A utility vehicle for power emergency repair includes a cab, a carriage and a lighting device, including mounting bases, a wire pole, a rotary base and a lamp assembly. A rotary shaft is bridged between the mounting bases, and the rotary base is fixedly connected to the rotary shaft. First and second positioning units are provided on the top of the carriage. The rotary base has first and second positioning surfaces, the first positioning unit includes a first limiting platform, and the second positioning unit includes a rotation limiting plate and positioning plates. The positioning plates is supported on a lower end surface of the rotation limiting plate. The utility vehicle further includes a driving assembly and first and second contacts. A trigger signal is generated and the driving assembly is controlled to release braking on the rotary shaft when the first and second contacts contact each other.

Utility vehicle for power emergency repair

Growing community of inventors

Zhejiang, China

Jian Wu