Abstract: A method for controlling a direct drive system, including: S1: outputting, by the actuator, a current to the winding of the stator corresponding to the actuator to cause the windings to drive the mover corresponding to the windings to move in a single direction along the guide rail; S2: sensing a position of the second position feedback means through the first position feedback means, and acquiring position information of the mover relative to the stator; and S3: changing a drive mode of the actuator according to the position information, so that the actuator adjusts, according to the drive mode, magnitude of the current outputted to the windings of the stator corresponding to the actuator. The above solution can reduce a number of power modules used in the direct drive system, so as to reduce overall manufacturing and use costs of the direct drive system.

Abstract: The disclosure discloses a preparation method of a composite coating for a resin matrix composite, comprising the following steps: preparing ceramic-resin composite powders which comprise Al2O3 ceramic, a thermosetting resin and a curing agent and are semi-thermosetting resin powders; and respectively spraying pure Al2O3 ceramic powders and the composite powders on the surface of the resin matrix composite by supersonic atmospheric plasma spraying to form a ceramic-resin composite coating, wherein the pure Al2O3 ceramic powders are fed into jet flow in a manner of feeding powder inside a spray gun, and the composite powders are fed into jet flow in a manner of feeding powder outside the spray gun. Correspondingly, the disclosure also provides a preparation device of a composite coating for a resin matrix composite.

Abstract: Provided are a high-performance composite coating and a preparation method and use thereof, which relates to the field of composite coating materials. The method includes steps: (1) ball milling a Cu powder, a Ti3AlC2 powder, an organic adhesive, a dispersant, and water to obtain a mixed slurry; (2) subjecting the mixed slurry obtained in step (1) to spray granulation to obtain granules, and sintering the granules to obtain a composite powder; and (3) spraying the composite powder obtained in step (2) onto a substrate material to obtain the high-performance composite coating.

Abstract: A small-size axial powder feeding inner hole plasma spraying gun comprises a nozzle with one end fixed on one side of a front gun body through a nozzle gland and the other end extending to the other side of the front gun body; an insulator arranged between the front gun body and a rear gun body; a powder feeding frame fixedly connected to the rear gun body internally provided with a powder inlet channel, a cathode seat of a cathode being connected to the powder feeding joint, a cathode head extending into a spray hole channel of the nozzle, and an annular cavity being formed between the cathode head and an inner wall of the spray hole channel; an air inlet channel arranged on the front gun body and communicated with the annular cavity; and a cooling channel with an interior introduced with cooling water.

Abstract: The disclosure discloses a preparation method of a composite coating for a resin matrix composite, comprising the following steps: preparing ceramic-resin composite powders which comprise Al2O3 ceramic, a thermosetting resin and a curing agent and are semi-thermosetting resin powders; and respectively spraying pure Al2O3 ceramic powders and the composite powders on the surface of the resin matrix composite by supersonic atmospheric plasma spraying to form a ceramic-resin composite coating, wherein the pure Al2O3 ceramic powders are fed into jet flow in a manner of feeding powder inside a spray gun, and the composite powders are fed into jet flow in a manner of feeding powder outside the spray gun. Correspondingly, the disclosure also provides a preparation device of a composite coating for a resin matrix composite.

Abstract: A high efficiency and high brightness multi-active layer tunneling regenerated white color semiconductor light emitting diode having a p type electrode 1, a monolithic red light cell 14, a tunnel junction 9, a monolithic green light 15 and blue light cell 16 (or a monolithic cyan light cell 19), wherein each of said cells are electrically connected by tunnel junctions 9, and the red cell physically connected with blue and green cell (or cyan cell) by wafer bonding layer 8. The lights from each cell synthesize white color light. The white light emitting diode only has one time optical-electrical conversion, so the quantum efficiency is high. Moreover, the white LED totally made from semiconductor materials, the lifetime of the white LED lamp is not limited by the relatively short lifetime of fluorescent material.