5 results about "Wave motor" patented technology

The application discloses a kind of based on wave motor's chip-based north seeker, including comprehensive control circuit board, wave motor type rotating platform based on MEMS chip, MEMS gyroscope assembly bin, upper limit cover plate, display module interface and three-section shell;Wherein comprehensive control circuit board completes whole rotation modulation north-seeking control and true north direction solution;Rotating platform completes multi-angle step rotation or continuous rotation under the operation of comprehensive control circuit, drives the rotation of MEMS gyroscope assembly bin and upper limit cover plate installed on rotating platform, realizes the rotation of gyroscope sensitive axis;Display module interface is realized north-seeking state and result display by external display.This application is based on the chip wave motor type rotating platform of flattening, the volume and mass of whole north seeker are greatly reduced, and the energy consumption of wave motor is low, the energy consumption of whole system is reduced, and based on comprehensive control circuit, the constant error compensation effect of rotating modulation technology to gyroscope is ensured, and the north-seeking precision is improved.

The invention provides a lithium niobate film MEMS traveling-wave motor design structure and a preparation method, and relates to the technical field of traveling-wave motors, and the lithium niobate film MEMS traveling-wave motor design structure comprises an upper electrode, a lower electrode, a piezoelectric driving layer and a traveling-wave micro-actuator with displacement amplification tooth structure; the upper electrode is arranged on the piezoelectric driving layer, the lower electrode is arranged under the piezoelectric driving layer, and the traveling wave micro-actuator with the displacement amplification tooth structure is arranged under the lower electrode; the piezoelectric driving layer is made of lithium niobate, the piezoelectric driving layer is divided into a plurality of driving electrode subareas, driving is achieved by applying multi-phase sine excitation signals to the piezoelectric driving layer, and one sine excitation signal is applied to each driving electrode subarea. The lithium niobate film MEMS traveling wave motor is prepared based on an LN-SOI wafer or an LN-SI wafer. The micro-motor has the advantage of improving the reliability and the output performance of the micro-motor.

The application provides a lithium niobate thin film MEMS traveling wave motor design structure and a preparation method, relates to the technical field of traveling wave motors, and comprises an upper electrode, a lower electrode, a piezoelectric driving layer and a traveling wave micro-actuator belt displacement amplification tooth structure; the upper electrode is arranged on the upper surface of the piezoelectric driving layer, the lower electrode is arranged on the lower surface of the piezoelectric driving layer, and the traveling wave micro-actuator belt displacement amplification tooth structure is arranged on the lower surface of the lower electrode; the material of the piezoelectric driving layer is lithium niobate; the piezoelectric driving layer is divided into a plurality of driving electrode partitions; driving is realized by applying a multi-phase sinusoidal excitation signal to the piezoelectric driving layer, and each driving electrode partition is respectively applied with a sinusoidal excitation signal; the lithium niobate thin film MEMS traveling wave motor is prepared based on an LN-SOI wafer or based on an LN-SI wafer. The application has the advantages of improving the reliability and output performance of the micro motor.

To provide a vibration wave motor that can achieve good driving characteristics even at low density. [Solution] The vibration wave motor 10 of the present invention comprises an electromechanical conversion element 13, an elastic body 12 on which vibration waves are generated on the drive surface by the vibration of the electromechanical conversion element 13, and a relative motion member 15 that contacts the drive surface of the elastic body 12 and is rotationally driven by the vibration waves. The electromechanical conversion element 13 has a density of 4.2 to 6.0 × 10³ kg / m³, and a plurality of grooves 12c are provided on the drive surface side of the elastic body 12. If the depth of at least one of the plurality of grooves 12c is T, the thickness from the bottom of the groove 12c to the joint surface of the elastic body on which the electromechanical conversion element contacts is B, and the thickness of the electromechanical conversion element 13 is defined as C, then the value of T / (B+C) is in the range of 1.3 to 2.8.

The invention discloses a chip traveling wave motor speed control system, which comprises an FPGA control board, a driving signal generation and amplification module and a photoelectric encoder feedback module, and is characterized in that the FPGA control board receives signal feedback of a photoelectric encoder, executes orthogonal decoding to obtain actual speed information of a motor, compares a difference value between an expected speed and an actual speed, and determines the speed of the motor based on the difference value. The feedback resistance value of the driving signal amplification module is adjusted in real time by using a PI (proportional integral) control algorithm, so that the amplitude value of the driving signal is dynamically adjusted, closed-loop control is formed, and finally, the actual running speed of the traveling wave motor is accurately tracked and approaches to the set expected speed. Through efficient configuration and optimization of FPGA logic resources and in combination with accurate identification of photoelectric encoder signals, the rotating speed stability of the chip traveling wave motor is improved, the rotating speed error of the system is reduced, the anti-interference capability of the system is enhanced, and the overall performance of motor control is improved.