4results about How to "Improve vibration performance" patented technology

The present invention discloses a low-vibration fault-tolerant current calculation method for a six-phase permanent magnet motor with a phase-loss fault. When the six-phase permanent magnet motor adopts a full-bridge power supply mode, if a phase-loss fault occurs, the vibration performance of the motor in the phase-loss operation will deteriorate sharply. Among them, the phase-loss fault types include single-phase phase loss, two adjacent phases loss, two non-adjacent phases loss and at most three phases loss. In order to suppress the deterioration of the vibration response of the motor after the phase-loss fault occurs, the residual phase magnetomotive force is reconstructed according to the reverse magnetomotive force in the residual phase synthetic magnetomotive force under different phase-loss fault types, and the residual phase current is adjusted to maintain the normal vibration response. Compared with the traditional phase-loss fault-tolerant current algorithm, the present invention mainly solves the problem of deterioration of vibration response in the operation process of the six-phase permanent magnet synchronous motor with a phase-loss fault. At the same time, while improving the vibration performance of the motor under a phase-loss fault, the torque performance of the motor under a phase-loss fault is guaranteed.

The invention belongs to the technical field of wafer detection, and discloses a slewing device suitable for wafer defect detection, which comprises a shell, a vacuum chuck, a rotating shaft, a driving piece, a limiting assembly and an adjusting assembly. At least one end of the shell is open; the vacuum chuck is rotationally connected to one end of the shell and is used for adsorbing a to-be-detected wafer; the rotating shaft penetrates through the shell, and one end of the rotating shaft is connected with the vacuum chuck; the driving piece is arranged in the shell and is in transmission connection with the other end of the rotating shaft; the limiting assembly is used for preventing the rotating shaft from moving in the shell in the radial direction and the axial direction. The adjusting assembly is arranged on the shell and used for adjusting the mass eccentricity of the rotating device. The rotary device has high load capacity, can sensitively change speed under the load working condition, guarantees the dynamic rigidity of a system, is excellent in vibration performance and strict in bounce limitation on parts, can achieve the national standard level G0.4 in dynamic balance level, and can meet the operation stability of the device at a high rotating speed.

The utility model discloses an electric slag removing machine which comprises a steel frame, fixed static teeth installed at the bottom of the steel frame, a vibration motor arranged at the top of the steel frame and powered by a mobile power source, a handrail arranged on one side of the steel frame, the vibration motor located at the midpoint position of the steel frame, and the bottom of the vibration motor fixed to the steel frame through a motor base. The motor base and the steel frame are installed through check bolts, the two sides of the steel frame protrude upwards, the motor base is installed on the protruding part, and the linkage sliding plate is installed in a gap at the bottom. Through vibration of the small vibration motor, the steel frame and the static teeth transmit excitation force to the conductive beam of the anode plate between the static teeth, so that ammonium sulfate crystals on the two sides of the conductive beam of the lead-silver alloy anode plate are knocked to fall off, and high efficiency and labor saving are achieved.

This invention discloses an internal exhaust pipe assembly for a compressor and its operating method. The internal exhaust pipe assembly includes an internal exhaust pipe and a muffler box. The muffler box has an air inlet and an air outlet. The internal exhaust pipe includes a first pipe and a second pipe. The first pipe is connected to the cylinder seat muffler cavity and the air inlet, respectively. The second pipe is connected to the compressor exhaust pipe and the air outlet, respectively. The muffler box has a sound-absorbing structure. By implementing the internal exhaust pipe assembly of this invention, the noise and vibration performance of the compressor during operation can be improved, thereby enhancing the overall performance and reliability of the compressor.