32results about How to "Increase rotor speed" patented technology

It is described a method and an arrangement for controlling a wind turbine (811) having a rotor (813) and being connected to a utility grid (831), the method comprising: increasing a rotational speed (205) of the rotor from a typical rotational speed (209, 505) to an increased rotational speed (211, 507).

A variable capacitive micro-electrostatic motor adopting five-degree-of-freedom electrostatic levitation is used in the fields of micro-executive components, micro-inertia sensitive elements, etc. of MEMS systems. The present invention includes an upper stator, a lower stator, a rotor, an inner stator and an outer stator, and a suspension control system. The upper and lower stators and the inner and outer stators form a closed inner cavity, and the rotor is suspended in the geometric center of the annular inner cavity during operation. The electrostatic force is applied by radial force electrodes, displacement detection is realized by detecting the capacitance differential change between the electrodes and the rotor, and the five-degree-of-freedom active electrostatic levitation is realized by means of the levitation control system, using the salient poles on the rotor and the driving electrodes on the stator Apply drive torque. The micro-electrostatic motor proposed by the present invention can constrain all degrees of freedom of motion of the rotor except the rotation around the Z axis, which not only eliminates the friction torque caused by mechanical contact, significantly improves the working life, but also provides greater driving torque and radial overload ability to obtain high rotor speeds.

The invention belongs to a rotating liquid film reactor in the technical field of preparation of inorganic functional materials and application of the rotating liquid film reactor in terms of preparation of layered double hydroxides. On the basis of the basic technology for preparing the layered double hydroxides by a coprecipitation method, a crystal chemistry principle is adopted, fluid mechanics is calculated and analyzed, so that the rotating liquid film reactor is designed, two types of fluid flows in a limited space in a turbulence manner, uniformity of supersaturation degree is guaranteed, nucleation rate of a system is improved, crystal growth speed is reduced, layered double hydroxides products with small sizes and narrow size distribution are obtained, the sizes of the products can be controlled within a range from 10nm to 150nm, and a size distribution range of the products can be reduced to a range from 20nm to 50nm.

The invention discloses a self-generating energy feedback barrier gate device comprising at least one powerplant, a power generating device, an energy storing device and a barrier gate device, wherein the powerplant is mounted in a lane and comprises a rotating assembly; a rotating shaft device of the rotating assembly is driven through the running of car wheels, the powerplant is driven by the rotating shaft device through a synchronizer to generate power; the powerplant is connected with the energy storing device; the energy storing device is connected with the barrier gate device; and a voltage regulator is added at the back of a generator of the powerplant and used for maintaining stability of the output direct voltage of the generator. The device disclosed by the invention has the advantages that the power is generated through raising and lowering of a deceleration strip when cars pass through, so that the automaticity is high, the energy utilization and conversion efficiency is high; and the electric energy produced through the rolling of the cars on the deceleration strip is stored in a storage battery to serve as feedback energy of the barrier gate device and form a closed-loop system, so that the occurrence of a phenomenon that the barrier gate device is incapable of normally working due to the power cutoff accident of an external power of the barrier gate device is avoided.

The invention relates to a vortex-eliminating rotor spinning device, which includes a vortex-eliminating channel, and the vortex-eliminating channel includes a fiber delivery channel and a bypass channel connected to the atmosphere; the bypass channel and the central axis of the fiber delivery channel are on the same straight line, And the bypass channel is located in the opposite direction of the fiber delivery channel in the fiber delivery channel; one side of the vortex elimination channel is provided with a fiber delivery channel entrance separating the fiber delivery channel and the bypass channel, and the vortex elimination channel passes through the fiber delivery channel entrance and the carding roller cover The corresponding notches of the shell are connected so that the vortex elimination channel communicates with the rotor in the rotor spinning device, and the other side of the vortex elimination channel is a straight side without gaps; the bypass channel opening area A of the bypass channel, the inflow rotor Increment ΔQ of airflow in the cup, actual negative pressure P in the rotor cup in Satisfy the numerical relationship with the set negative pressure P in the rotor cup A=‑52.72+7.6ΔQ‑0.0039P in , ΔQ=5.8‑0.0006P, adding a bypass channel can directly supply air, eliminate the eddy current of the spinning machine, and improve the straightness of the fiber.