Shanghai Xpt Technology Limited

Hefei Normal University

Xpt Eds (hefei) Co., Ltd.

Kai Wang

Dachuang Li

Wei Song

Mingxin Dong

Baosen Shi

Wencheng Hong

Dongsheng Ding

Xin Gong

The present invention provides a vehicle control method for controlling a capacitance ripple and a torque ripple of a vehicle drive system, wherein the vehicle drive system comprises a first DC-DC convertor. The vehicle control method comprises utilizing a first three-phase inverter circuit of a motor control device of the vehicle drive system as a first switching circuit of the first DC-DC convertor; utilizing a first three-phase winding of a motor of the vehicle drive system as a first three-phase inductor of the first DC-DC convertor; utilizing a pulse width modulation controller of the vehicle drive system for modulating a first three-phase current outputted by the first switching circuit to generate a first three-phase carrier wave; and setting a first phase difference of each phase of the first three-phase carrier wave for controlling the capacitance ripple and the torque ripple.

Vehicle control method and vehicle drive system

A proportion adjustable single-photon beam splitter based on cold atom storage includes a two-dimensional magneto-optical trap for receiving a first optical signal to be split; and a coupling beam. The coupling beam is incident at a certain angle with the first optical signal to the two-dimensional magneto-optical trap. The storage time of the two-dimensional magneto-optical trapcan be adjusted by controlling the switching time of the coupling beam, and then adjusting a proportion of a photon number of a storage part and a photon number of a leakage part of the first optical signal. A splitting proportion may also be adjusted by controlling an optical depth of the alkali metal atomic group trapped in the two-dimensional magneto-optical trap.

Proportion adjustable single-photon beam splitter based on cold atom storage

Growing community of inventors

Hefei, China

Kai Wang