6results about How to "Eliminate volume" patented technology

The application relates to an electromagnetic compatibility technology of an aviation power electronic device, in particular to an aviation SiC motor driver electromagnetic compatibility optimization method and system. By defining a regulation node and extracting physical boundary parameters under severe working conditions, a planning model is constructed to maximize the tolerable interference wave fluctuation amplitude, and three-level boundaries covering transient ringing suppression, frequency band radiation suppression and thermal stress distribution are output. Cross verification is used to obtain a balance coefficient. In a deep full connection mapping network combined with a Monte Carlo tree search mode, an optimization instruction sequence is generated by considering the suppression effect and regulation cost. In real-time operation, a layered retreat mechanism is started through monitoring of the conduction emission margin, and is differentiated according to the action sensitivity and is sequentially restored. Finally, the three-level boundary balance coefficient is updated by using the measured spectrum deviation feedback, and an electromagnetic compatibility evolution technical scheme covering the whole life cycle of the device is formed.

The invention provides a ball joint mechanism and a photographing holder adopting the ball joint structure, the ball joint mechanism comprises a ball body and a shell, a containing cavity extending in the axial direction is formed in the ball body, an adjusting block, an elastic piece and a ball are sequentially installed in the containing cavity, and the ball can be exposed to the outer surface of the ball body from an opening in the first end of the containing cavity; a curved surface seat is arranged at the inner bottom of the shell, the curved surface seat is provided with an inner concave surface matched with the ball, and a non-uniform gap with a deep center and a shallow edge is formed between the inner concave surface and the outer surface of the ball body; a ball handle is arranged on the ball body, an axial through hole communicated with the containing cavity is formed in the ball handle, an adjusting rod is installed in the axial through hole, the lower end of the adjusting rod is in threaded connection with an adjusting block, and the compression amount of the elastic piece is changed by operating the adjusting rod and the adjusting block. When the ball body rotates under the action of external force, rolling contact is formed between the balls and the inner concave surface of the curved-surface seat, so that the smoothness of rotation can be ensured, blockage is avoided, and a relatively large damping feeling is obtained.

The application discloses a bearingless permanent magnet synchronous axial flow pump based on integrated winding and a control method thereof. The claw pole type stator comprises a plurality of claw pole units, each claw pole unit has a stator tooth extending in the axial direction and a claw head extending in the radial direction from the end of the stator tooth, and the inner surfaces of all the claw heads enclose a working air gap opposite to the outer surface of the rotor; the torque winding and the suspension force winding are wound on the stator tooth together, share the same axial winding space, and the electrical phase sequences of the two sets of windings are independent; the suspension force winding is configured to pass through two groups of currents with opposite phase sequences; the pose sensor is arranged in the radial gap between adjacent claw heads; by collecting the position sensor in real time, the magnetic pole state of each claw head is dynamically adjusted by controlling the currents of the torque winding and the suspension force winding, and the driving torque and the controllable radial suspension force are generated simultaneously. The application solves the problems of complex structure and insufficient control precision of the existing magnetic suspension pump, and has the characteristics of compact structure, high control precision and fast dynamic response.

This invention discloses a method for three-dimensional fine modeling and stability probability evaluation of complex rock mass blocks, comprising three steps: first, three-dimensional modeling of complex blocks based on three-dimensional laser scanning, integrating real high-precision terrain and random boundaries; second, introducing full-space stereographic projection for kinematic mobility prediction, inputting the extracted random geometric parameters into a rigid body limit equilibrium vector model considering water-rock coupling effects such as pore water pressure reduction, and calculating the probability distribution of the safety factor; and third, based on a multi-source collaborative support inversion model of target reliability, dynamically calculating and outputting the probability distribution of anchor cable reinforcement force required to maintain the target's stable state. This invention overcomes the inherent defects of traditional deterministic analysis and simplified probabilistic models, and overcomes the shortcomings of existing technologies that often use fixed attitude parameters and are difficult to detect potential risks.

This invention discloses a Maxwell force-driven three-degree-of-freedom electromagnetic actuator and its control method. Four sets of permanent magnets are evenly distributed around the mover, and the permanent magnets are respectively connected to magnetic guide shoes and stator magnetic arms located obliquely above and below the side wall of the mover. An excitation coil is wound on the stator magnetic arm, which is connected to a magnetic guide base. The magnetic guide base is connected to a magnetic guide column, which extends into the interior of the mover and is fixed in the middle of a flexible diaphragm. The flexible diaphragm is connected to the mover. The permanent magnets, magnetic guide shoes, stator magnetic arms, magnetic guide base, and magnetic guide column together constitute a magnetic circuit system, enabling the mover to simultaneously respond to three independent current excitation modes, realizing integrated parallel drive of rotation around the X-axis and Y-axis and translation along the Z-axis. This invention solves the problems of structural redundancy, lack of degrees of freedom, contradiction between motion range and linear drive, and control coupling in existing electromagnetic actuators through the design of "three-degree-of-freedom integrated magnetic circuit topology" and "misaligned mover-stator configuration".