Gree Electric Appliances, Inc. of Zhuhai

Sun Yat-Senuniversity

Gree Green Refrigeration Technology Center Co., Ltd. of Zhuhai

Peking University

Ping an Technology (Shenzhen) Co., Ltd.

O-Net Communications (Shenzhen) Limited

Whealthfields (Guangzhou) Co., Ltd.

Huawei Technologies Co., Limited

Zte Corporation

Huawei Device Co., Ltd.

University of Electronic Science and Technology of China

Jing Wang

Lei Miao

Huangwei Wu

Zaifeng Zong

Yusheng Hu

Ge Li

Ping Fang

Jinguo Zhu

Shuang Liang

Keqin Liu

Qi Zhang

Fengyan Qi

Yu Wei Chen

Lin Liu

Yi Yang

Shiyong Jiang

Haitao Liu

Yuan Liu

Bin Chen

Yong Xiao

Yu Zhang

Qing Zhang

Guiming Shu

Chen Hu

Qiang Su

Wuzhou Zhan

Fei Lu

Liang Zhang

Bo Yang

Na Zhou

Dongqi Wang

Meng Huang

Ningning Chen

Xuefen Zhang

Jianhua Li

Hui Zhang

Mingzhu Dong

Zhigang Zhao

Chuang Ma

Zhengzhong Du

Yuzhen Huo

Yongfeng Tu

Wen Gao

Di Wang

Xianqiao Yu

Shuaichen Si

Zeyin Mi

Peng Ren

Wu Wen

Jinbo Yu

Shan Zhang

Shangxian Feng

Yiting Shao

Chongyang Feng

Xinchao Peng

Xiaoyang Wang

Minya Ye

Zunhui Xiao

Xuejie Zhang

Hewei Lou

Weitao Ni

Yuming Feng

Peiyu Dang

Yijun Xu

Yi Ting Shao

Jianfeng Xu

Yi Zhang

Dongbai Yi

Lanlan Li

Yuhua Xie

Jiangxi Song

Suibiao Huang

Yongguang Zhang

Cong Wang

Zhenwei Chen

Mingqiang Sheng

Luyu Cao

Hongdi An

Tai Yung Titus Cho

Mingzhao Fang

Weijiang Gan

Qiongyun Liang

Lin Huang

Yingzhe Wu

Ai Hua Yu

Huiping Yin

Kai Li

Disclosed are a photovoltaic power supply system and a control method thereof, and an air conditioning unit. The system includes: a photovoltaic cell panel; a direct-current bus; a DC/DC converter, one end of which is connected to the photovoltaic cell panel, and the other end of which is connected to the direct-current bus; and a switch assembly arranged in parallel with the DC/DC converter, wherein one end of the switch assembly is connected to the photovoltaic cell panel, and the other end thereof is connected to the direct-current bus, and the switch assembly is used for controlling a grid connection mode of the photovoltaic cell panel. When the switch assembly is turned off, the photovoltaic cell panel is connected to the direct-current bus by means of the DC/DC converter; and when the switch assembly is turned on, the photovoltaic cell panel is directly connected to the direct-current bus.

Photovoltaic power supply system and control method thereof, and air conditioning unit

A copper ion-doped polychromatic fluorescent glass and a preparation method and use thereof are provided. The fluorescent glass has a chemical formula shown as the following: aPO-bSiO-cZnO-dCsCO-eNaCl-fCuCl, wherein a, b, c, d, e, and f in the formula represent the molar coefficients of compounds, wherein a is 45 to 65, b is 10 to 30, c is 1 to 5, d is 5 to 20, e is 5 to 20, f is 0.1 to 5. The fluorescent can achieve blue, orange and near-infrared photoluminescence under the UV light with higher fluorescent quantum yield.

Copper ion-doped polychromatic fluorescent glass and preparation method and use thereof

The present disclosure discloses a control method for an energy storage system and apparatus, an energy storage system, and an energy storage device. The control method includes obtaining an operation parameter of a power grid and an electric quantity state of an energy storage battery in an energy storage system; and controlling working states of the power grid, the energy storage battery, a first auxiliary power supply, and a second auxiliary power supply according to the operation parameter of the power grid and the electric quantity state of the energy storage battery.

Control method for energy storage system and apparatus, energy storage system, and energy storage device

The present disclosure provides a parameter configuration device, including a first signal modulator, a second signal modulator and an operating member electrically connected with the first signal modulator or the second signal modulator. The first signal modulator and the second signal modulator have a connection state and a separated state. In the connection state, the first signal modulating element is electrically connected with the second signal modulating element, and the first signal modulating element and the second signal modulating element enclose a configuration space for a cable to pass through. In the separated state, the first signal modulator is separated from the second signal modulator. The embodiments of the present disclosure make it easier to perform the operation of parameter configuration with a low cost.

Parameter configuration device

The present disclosure relates to an air conditioner pipeline device and an air conditioner. The air conditioner pipeline device includes a gaseous refrigerant connecting pipe and a liquid refrigerant connecting pipe which are configured to be connected between an indoor unit and an outdoor unit of the air conditioner. At least one of the gaseous refrigerant connecting pipe and the liquid refrigerant connecting pipe adopts a multi-layer pipe. The multi-layer pipe includes at least two conductive pipes, sequentially and coaxially sleeved along a radial direction of the multi-layer pipe and configured to be connected to a power supply of the air conditioner to transmit power to the air conditioner, where an internal area of the innermost layer of conductive pipe is used for a refrigerant to flow; and first insulating layers, configured to achieve insulation of at least two conductive pipes.

Air conditioner pipeline device and air conditioner

The present invention provides a point cloud intra prediction method and device based on weights optimization of neighbors. The invention relates to intra prediction for point cloud attribute compression, by optimizing the weights of the neighboring points on the basis of the density of the point cloud in three directions, i.e. x, y and z directions, and specifically, calculating the optimized weight of each neighboring point by optimizing corresponding coefficients of three coordinate components, i.e. x, y and z coordinate components of distances. The invention can improve the accuracy of intra prediction by means of enhancing the utilization of the overall geometric information of the point cloud, and then transformation, quantification and entropy are carried out on the prediction residuals, such that a better point cloud attribute compression performance is achieved.

Point cloud intra prediction method and device based on weights optimization of neighbors

A tangential motor, a tangential motor rotor and a rotor core thereof are provided. The rotor core includes a rotor body and magnetic steel grooves provided on the rotor body 2N magnetic isolation holes are provided in a rotor magnetic pole between every two adjacent magnetic steel grooves. The 2N magnetic isolation holes are symmetrically provided at two sides of a magnetic pole center line of the rotor magnetic pole. A width of each of the magnetic isolation holes increases from a circle center of the rotor body to an outer side of the rotor body. Outer side hole surfaces, close to the outer side of the rotor body, of the magnetic isolation holes are arc-shaped surfaces which are concentrically arranged with the rotor body. The rotor core is able to reduce the vibration noise of the motor and increase the efficiency of the motor.

Tangential motor, tangential motor rotor and rotor core of tangential motor rotor

The present disclosure provides a method and device for detecting insulation impedance of a photovoltaic inverter. The method includes: detecting, after a first path of photovoltaic input is electrically connected to the photovoltaic inverter, whether a second path of photovoltaic input needs to be electrically connected to the photovoltaic inverter; if the second path of photovoltaic input needs to be electrically connected to the photovoltaic inverter, causing the first path of photovoltaic input to stop operating, and then detecting insulation impedance of the second path of photovoltaic input; judging whether the insulation impedance of the second path of photovoltaic input satisfies a preset impedance condition; and if the insulation impedance of the second path of photovoltaic input satisfies the preset impedance condition, causing the second path of photovoltaic input to be electrically connected to the photovoltaic inverter, and causing the first path of photovoltaic input and the second path of photovoltaic input to perform grid-connected operation. The present disclosure resolves the problem in the prior art that insulation detection is inaccurate when two paths of photovoltaic input are grid-connected, such that insulation impedance detection results are more accurate, thereby increasing the safety of the inverter.

Method and device for detecting insulation impedance of photovoltaic inverter

Provided are a point cloud attribute prediction method and prediction device based on a filter. The method comprises a coding method and a decoding method, and the device comprises a coding device and a decoding device. The method comprises: determining K nearest neighbor points of the current point; determining a filter matrix; and determining an attribute prediction value of the current point according to the filter matrix. Therefore, the compression performance of a point cloud attribute can be improved by means of selecting an appropriate filter.

Point cloud attribute prediction method and device based on filter

The present disclosure relates to an IGBT driving circuit and a power conversion device. The IGBT driving circuit includes a driving chip with a first driving signal port (Vo); a driving resistor adjustment circuit connected between the first driving signal port (Vo) and a gate (G) of an IGBT, a driving resistor formed by the driving resistor adjustment circuit being adjustable in size; a peak voltage detection circuit connected to the gate (G) of the IGBT which is conductive to the first driving signal port (Vo), the peak voltage detection circuit being configured to monitor whether a peak voltage occurs when the IGBT is turned off; and a resistor adjustment control circuit connected between the peak voltage detection circuit and the driving resistor adjustment circuit and configured to reduce a resistor formed by the driving resistor adjustment circuit when the peak voltage is monitored when the IGBT is turned off.

IGBT driving circuit and power conversion device

The present invention provides a power conversion method, apparatus, and device, and a medium. The power conversion apparatus comprises: a configurable input interface, a power conversion circuit, and a configurable output interface. The configurable input interface is provided to configure a first electrical connection mode between an input power supply and the power conversion circuit, and to electrically connect the input power supply to the power conversion circuit. The configurable output interface is provided to configure a second electrical connection mode between a load and the power conversion circuit, and to electrically connect the load to the power conversion circuit. The power conversion circuit is provided to perform corresponding power conversion according to a parameter of the input power supply and a parameter of the load. Embodiments of the present invention resolve the problem in the related art of poor general applicability of a power conversion apparatus, thereby improving the general applicability of the power conversion apparatus.

Power conversion method, apparatus, and device, and medium

Disclosed is a control parameter determining method for a photovoltaic air conditioning system, specifically including: determining a real-time inductance parameter of a controlled object of the photovoltaic air conditioning system according to real-time grid-connected power of the photovoltaic air conditioning system; substituting the real-time inductance parameter into the controlled object of the control system to calculate a basic control parameter of the control system; presetting a plurality of adjustment parameters corresponding to different grid-connected power respectively; when the real-time grid-connected power is matched with one of the grid-connected power, selecting an adjustment parameter corresponding to the matched grid-connected power to modify the basic control parameter, to obtain a target control parameter. The present disclosure further disclosed a control parameter determining apparatus and a control system for a photovoltaic air conditioning system.

Control parameter determining method and apparatus, and control system for photovoltaic air conditioning system

The present disclosure relates to a frequency modulation device, a switching power supply and a frequency modulation method thereof. The device includes: a waveform generation unit () configured to generate a periodic signal required for performing frequency modulation on a clock signal of a switching power supply to be controlled; a frequency modulation unit () configured to perform voltage-current conversion and arithmetic processing based on the periodic signal to obtain a frequency modulation current required for performing the frequency modulation on the clock signal of the switching power supply to be controlled; and an RC oscillation unit () configured to perform RC oscillation processing based on the frequency modulation current to obtain a frequency oscillation signal as the clock signal of the switching power supply to be controlled.

Frequency modulation device, switching power supply and frequency modulation method thereof

A control method for a direct current electrical device and a direct current electrical device. The method includes: acquiring input parameters of a power supply of the direct current electrical device, identifying a type of the power supply according to the input parameters, and determining an operation mode of the direct current electrical device corresponding to the type of the power supply, and controlling an operation of the direct current electrical device according to the operation mode.

Control method for direct current electrical device and direct current electrical device

Disclosed is a low power consumption switching circuit with voltage isolation function for a PMOS transistor bulk, including a bulk voltage switching control unit, a bulk voltage switching unit, a first voltage input terminal, a second voltage input terminal, and a bulk voltage output terminal. The bulk voltage switching control unit includes a plurality of PMOS transistors and weak pull-down devices, and is configured to generate a control signal to control the bulk voltage switching unit to make the bulk voltage output terminal to be connected to a higher potential between the first voltage input terminal and the second voltage input terminal. The bulk voltage switching unit includes a plurality of PMOS transistors, and is configured to connect bulks of the PMOS transistors to the higher potential between the first voltage input terminal and the second voltage input terminal. Each of the PMOS transistors is a low-withstand-voltage device.

Low power consumption switching circuit with voltage isolation function for PMOS transistor bulk, and integrated chip

Growing community of inventors

Guangdong, China

Jing Wang