Chinese Academy of Sciences

Hefei University of Technology

Hefei Cas Ion Medical and Technical Devices Co., Ltd

University of Science and Technology of China

Shincron Co., Ltd.

Ming Li

Jinxing Zheng

Yuntao Song

Xing Zhang

Haiyang Liu

Feng Jiang

Xianhu Zeng

Wuquan Zhang

Lei Zhu

Yang Wang

Yousong Jiang

Kun Lu

Yonghua Chen

Ekishu Nagae

Jing Wei

Yong Cheng

Qian Gao

Mingzhun Lei

Zixuan Guo

Jilei Wang

Fei Liu

Hailong Pan

Junsong Shen

Enjun Liu

Yudong Lu

Zhuoyao Tang

Yifan Du

Xiaoliang Zhu

Yongtao Mao

Xing Wang

Pinghui Zhao

Zhou Yin

Cheng Zhou

Ge Wang

Junsheng Zhang

Haiqian Wang

Bin Xie

Zijing Lin

Wei Kong

Bo Zhi

Manfen Han

Yu Zhang

Songzhu Yang

A passivity-based dual-mode integrated control method for a grid-connected inverter (GCI) is provided. In view of the insufficient robustness of the conventional single-mode GCI in a high-impedance and low-inertia weak grid, and the problem of wideband oscillation of the grid voltage and grid current or even system instability in nonlinear application scenarios such as grid structure/parameter variation, and plug-and-play of the inverter, the dual-mode integrated control method performs modeling on the GCI based on a port-controlled Hamiltonian (PCH) model, thereby obtaining integrated control with a weighted passivity-based feedback control law for the GCI based on a grid-following (GFL) mode and a grid-forming (GFM) mode. Based on the dual-mode integrated control method, the stable operation of the GCI in severe grid conditions with large fluctuation of the impedance, and desirable robustness of the GCI in nonlinear working scenarios can be ensured.

Passivity-based dual-mode integrated control method for grid-connected inverter

A high-temperature superconducting plasma thruster system, having variable temperature ranges and being applied in space, is provided. The high-temperature superconducting plasma thruster system includes: a cathode-anode assembly, a high-temperature superconducting magnet system, a supporting and adjusting platform, a power-and-gas supply and cooling system, and an obtaining control system. The cathode-anode assembly is disposed at a center of a ring of the high-temperature superconducting magnet system; the cathode-anode assembly and the high-temperature superconducting magnet system are spatially engaged with each other by the supporting and adjusting platform to form a main body of the thruster system; the power-and-gas supply and cooling system and the obtaining control system are located outside of the main body of the thruster system and are connected to the cathode-anode assembly and the high-temperature superconducting magnet system.

High-temperature superconducting plasma thruster system having variable temperature ranges and being applied in space

A dual-mode combined control method for a multi-inverter system based on a double split transformer is provided. For an extremely-weak grid, the method provides the dual-mode combined control method for a multi-inverter system based on a double split transformer. According to the method, the equivalent grid impedance at a point of common coupling (PCC) of one grid-connected inverter (GCI) in the multi-inverter system based on the double split transformer is obtained with a grid impedance identification algorithm, and the system sequentially operates in a full current source mode, a hybrid mode, and a full voltage source mode according to a gradually increasing equivalent grid impedance, thereby effectively improving the stability of the multi-inverter system based on the double split transformer during variation of the strength of the grid. The method ensures that the system can still operate stably in the extremely-weak grid.

Dual-mode combined control method for multi-inverter system based on double split transformer

The present disclosure provides a cooling structure of heat pipe for superconducting magneto plasma dynamic thruster having a cylindrical structure and includes a cathode, an intermediate connector and an anode. The cathode is arranged inside the intermediate connector, the anode is arranged outside the intermediate connector; the cathode is provided with a cathode cooling mechanism, and the anode is provided with an anode cooling mechanism. The cathode cooling mechanism includes a cathode heat pipe and a cathode heat dissipation fin. The anode heat pipe cooling mechanism includes an anode heat pipe and an anode heat dissipation fin.

Cooling structure of heat pipe for superconducting magneto plasma dynamic thruster

A superconducting dipole magnet structure that includes coil boxes, a dewar and a support device is provided, wherein each of the coil boxes is of a one-piece structure in which a superconducting coil is provided, wherein the superconducting coils are opposite to each other so that a uniform dipole magnetic field is generated when the two superconducting coils are energized, and wherein the support device is fixed to the dewar and supports the coil box in the way of point contact.

Superconducting dipole magnet structure for particle deflection

A honeycomb rib structure in a rotating gantry of a proton includes an upper honeycombed rib plate and a lower honeycombed rib plate which are mounted in a cylindrical body through a plurality of connecting structures. The upper and lower honeycombed rib plates are symmetrically arranged, and are spliced by a plurality of basic structures which are in a regular hexagonal shape. Connecting nodes between the adjacent basic structures are of a ring structure. Densities of the upper and lower honeycombed rib plates are adjusted through a density increasing structure.

Honeycomb rib structure in rotating gantry of proton therapy device

Disclosed is a beam energy dispersion adjusting mechanism for superconducting proton cyclotron. The adjusting mechanism includes a vacuum cavity, bases are symmetrically mounted on outer walls of four faces of the vacuum cavity in horizontal and vertical directions, an electric cylinder and a transmission mechanism are mounted on each of the four bases, a jaws block and a position fixing plate are correspondingly provided on an inner wall of the vacuum cavity at each face. The transmission mechanism includes an oil-free sleeve, a moving connecting rod onto which the position fixing plate is fixed, a corrugated pipe, and an electric cylinder connecting block whose both ends are screwed with the moving connecting rod and the electric cylinder, the jaws block is fixedly connected with the position fixing plate. The disclosure utilizes the electric cylinder to drive the jaws block to complete specified linear displacement, and satisfies back-end beam quality requirements.

Beam energy dispersion adjusting mechanism for superconducting proton cyclotron

A magnetic field generator arranged behind a target and for generating a magnetic field on a front surface of the target based on magnetic force lines can include a ring-shaped outer magnetic body having a pole axis in a parallel direction (X-direction) with respect to the target surface, a center magnetic body arranged on an inner side of the outer magnetic body and having a pole axis in a parallel direction (X-direction) with the direction of the pole axis of the outer magnetic body, a yoke plate for supporting the outer magnetic body and the center magnetic body from behind, and a magnetic permeable plate for changing a magnetic field distribution of the front surface of the target. The magnetic permeable plate is arranged so as to be supported by the yoke plate from behind.

Magnetic field generator, magnetron cathode and spattering apparatus

Growing community of inventors

Anhui, China

Ming Li