6results about How to "Fast frequency" patented technology

The utility model relates to an ozone gas-liquid treatment device and a photovoltaic cleaning system. The ozone gas-liquid treatment device comprises a mixing mechanism and a gas-liquid separation mechanism. The mixing mechanism comprises a pipeline and is used for mixing the ozone gas and the ozone liquid to form a mixed fluid and enabling the mixed fluid to flow in the pipeline, and the mixing mechanism is used for increasing the flow speed of the mixed fluid to be higher than the flow speed of at least one of the ozone gas and the ozone liquid; the gas-liquid separation mechanism comprises a first inlet, a first outlet and a second outlet, the first inlet is communicated with the pipeline, and the gas-liquid separation mechanism is used for separating the mixed fluid and the residual gas output by the mixing mechanism and discharging the mixed fluid and the residual gas from the first outlet and the second outlet correspondingly. The mixing mechanism can promote mixing of ozone water and ozone gas by increasing the flow speed of the ozone water, and the gas-liquid separation mechanism can separate bubbles in the ozone water, so that the cleaning effect of the ozone water on silicon wafers can be improved, and the surface treatment quality of the silicon wafers can be improved.

Disclosed is a use of a novel light sensitive channel protein VR 1.0 in the preparation of a retinal photoreceptor cell degenerative disease drug, belonging to the field of biomedicine. The amino acid sequence of the present light sensitive channel protein VR 1.0 is shown in SEQ ID NO. 1, and the nucleotide sequence of the encoding gene thereof is shown in SEQ ID NO. 2. The present light sensitive channel protein VR 1.0 maintains a stable current signal under a high frequency response while having high sensitivity and fast dynamics, and also has a faster response frequency under same light stimulation conditions. The present protein has clear therapeutic effects on retinal photoreceptor cell degenerative diseases, and can be used to prepare a drug for restoring the photoreceptor function in the retina, restoring the vision or photosensitive ability of a subject, and treating retinal degenerative diseases. In the present application, a new idea for developing photogenetic therapy for retinal photosensitive cell degenerative diseases is provided, and options for clinical optogenetic therapy are expanded.

This invention discloses a control method for grid-connected static synchronous condensers based on virtual inertia and strong damping support. The method includes: establishing a mathematical model of the wind turbine and the grid-connected static synchronous condenser; using a multi-phase-shifting transformer as the topology for multiple static synchronous condensers connected in parallel to the wind farm grid connection point; constructing a multi-objective coordinated control relationship based on the dynamic characteristics of the grid-connected converter and energy storage, considering supporting power, system frequency, AC voltage, and converter energy; introducing virtual inertia, adaptive damping, rapid voltage regulation, and energy stabilization mechanisms to correct the multi-objective coordinated control relationship; and building a simulation and hardware-in-the-loop experimental platform for verification. This invention simulates the rotor inertia of a synchronous motor through virtual inertia, adjusts the damping magnitude through adaptive damping, and maintains DC-side voltage balance through energy stabilization, thus solving the problems of traditional static synchronous condensers lacking autonomous grid connection capability, oscillation under weak grid conditions, insufficient inertia, and slow response.

This invention discloses a distributed model predictive control method for offshore front-end speed-regulating wind turbines, belonging to the field of new energy power generation technology. The method decomposes the overall control task into three parallel subsystems: pitch control, hydraulic torque regulation, and excitation, and establishes local discrete predictive models for each. In each sampling period, rolling optimization of each subsystem is performed in parallel, and the future predicted trajectories of generator speed and terminal voltage are introduced as globally consistent variables. By constructing an augmented Lagrangian cost function based on the alternating direction multiplier method and iteratively solving it, the local predicted trajectories are driven to converge to the globally consistent optimal trajectory. Finally, the first instruction of the optimal control sequence obtained after iterative convergence is output to each actuator, achieving coordinated control of the three subsystems. This allows for rapid and smooth simultaneous satisfaction of frequency and voltage synchronization conditions before grid connection, effectively suppressing coupling interference and wind speed fluctuations, and improving grid connection quality and operational reliability.

The utility model provides a kind of rapid optical frequency detection device, including the Michelson interferometer with one input light path, the Michelson interferometer has at least 2 interference arms, the interference arm tail is provided with the same mirror as the interference arm number, input light is reflected after entering interference arm Michelson interferometer, generates multipath output light, the output light is received by first photoelectric detector, and the first photoelectric detection signal generated is used to calculate the optical frequency variation of input light;One light path in the input light is input to wavelength division multiplexer, and the two light output by the wavelength division multiplexer is received by two second photoelectric detectors, and second photoelectric detection signal is generated to calculate the absolute optical frequency of input light.

The invention belongs to the technical field of explosion prevention of permanent magnet motors, and particularly relates to a mining explosion-proof direct-drive permanent magnet motor, which comprises a permanent magnet motor, an output shaft and a base, an outer ring of the permanent magnet motor is fixedly provided with a gas ring, the periphery of the gas ring is uniformly provided with gas holes, and a driving cavity is fixed above the base; a notch is formed in the upper portion of the driving cavity, the driving cavity comprises a gear, a sleeve, an extrusion rod, an air pressure cavity, an air pressure plate, an air pressure rod, a filtering cavity, an air cavity and an air guide pipe, the permanent magnet motor is fixedly installed on the upper portion of the base, the output shaft is fixedly connected with the output end of the permanent magnet motor, and a fluted disc is fixed to the outer side of the output shaft; according to the explosion-proof permanent magnet motor, the problem that the safety of a coal mine is threatened due to the fact that a current permanent magnet motor is made of an explosion-proof material, sparks or high temperature can still be generated in the operation process, and the sparks and the high temperature can cause explosion is solved.