15 results about "Wave motor" patented technology

To provide a vibration wave motor capable of yielding excellent driving characteristics even at a low density.SOLUTION: A vibration wave motor 10 of the present invention comprises: an electromechanical conversion element 13; an elastic body 12 on a driving surface of which a vibration wave is generated by vibration of the electromechanical conversion element 13; and a relative motion member 15 that is in contact with the driving surface of the elastic body 12 and is driven to rotate by the vibration wave. The electromechanical conversion element 13 has a density of 4.2 to 6.0×103 kg / m3. A plurality of grooves 12c are provided on the side of the driving surface of the elastic body 12. When a depth of at least one of the plurality of grooves 12c is defined as T, a thickness from a bottom of each groove 12c to a bonding surface of the elastic body with which the electromechanical conversion element is in contact is defined as B, and a thickness of the electromechanical conversion element 13 is defined as C, a value of T / (B+C) is within a range of 1.3 to 2.8.SELECTED DRAWING: Figure 10

The present disclosure relates to a lens apparatus including: a second lens unit and a fourth lens unit supported to be movable in an optical axis direction; a vibration wave motor unit configured to drive the second lens unit; a VCM configured to drive the fourth lens unit; a fixed lens barrel supporting the vibration wave motor unit and the VCM; a step-up transformer constituting a vibration wave motor unit; an inductor constituting the VCM; and a flexible printed circuit board on which a step-up transformer and an inductor are mounted. At least one of the vibration wave motor unit and the VCM overlaps at least one of the step-up transformer and the inductor when viewed from the optical axis direction. The invention also relates to an imaging device.

The application discloses a kind of driving mechanism based on travelling wave motor, it is related to motor drive technical field, including: bearing structure, MEMS driver and rotor structure;Rotor structure is arranged on MEMS driver, and rotor structure is driven by MEMS driver to rotate;Bearing structure is used to carry the body to be rotated, and bearing structure is set on rotor structure and rotates along with rotor structure;The scheme is based on the cooperation of MEMS's travelling wave micro driver and rotor mechanism and bearing structure, utilizes the cooperation of MEMS travelling wave type micro motor structure and rotor mechanism to realize in situ rotary drive of chip end, utilizes the processing capacity of micron or nanometer level of the characteristic size of MEMS process technology, and simultaneously, MEMS structure has the characteristics of batch preparation, no assembly or less assembly, so that the number of structural components of the driving mechanism is less, in situ rotary drive of chip end is facilitated.

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 object of the present invention is that in the electrical safety intelligent protection device, we have solved the problem of automatically detecting the insulation between the electrical appliances including motors and between each circuit line and the ground insulation under the power-off condition through intelligent control by a single-chip microcomputer. Then, a structure including temperature detection of the terminal block, a protection circuit for detecting the current of a three-phase single-pulse sine-wave motor, a main housing, and a display is provided. In the electrical safety intelligent protection device, a temperature sensor is added to the terminal block and controlled by a single-chip microcomputer to protect the temperature of the terminal block. When the temperature of the terminal block exceeds the specified value, the power supply is cut off to avoid unexpected fires caused by serious overheating of the terminal block, so that personal and property are not severely damaged. The protection circuit for detecting the current of a three-phase single-pulse sine-wave motor adds a reference voltage to the center line of the three-phase current transformer in the motor protection circuit. Its circuit is simple, and the current sampling outputs a complete three-phase pulsating single sine wave, which enters the single-chip microcomputer for processing to achieve over-current and overload protection of the three-phase working current of the motor and unbalance protection of the three-phase current.

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.

To obtain good vibration characteristics with a vibrator formed by bonding a lead-free element and an elastic body.SOLUTION: A vibration wave motor has an annular elastic body that has a bottom surface to come into contact with an element and a drive surface having a groove, and that drives a mover with a vibration wave generated in the drive surface by displacement of the element. The density of the element is 4.2 to 6.0×103 kg / m3, and the value of [(T / B) / W] ranges from 0.84 to 1.94 wherein T represents the depth of the groove, B represents the distance from a bottom of the groove to the bottom surface, and W represents a radial-direction width of the elastic body.SELECTED DRAWING: Figure 7

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.

In a vibration wave motor that includes a first elastic body and a second elastic body, a piezoelectric element (electromechanical energy conversion element) sandwiched between the first elastic body and the second elastic body, and a contact body configured to come into pressure contact with the first elastic body, an outer shape of a cross-section (XY plane) in the piezoelectric element perpendicular to a pressure direction (Z direction) in pressure contact between the first elastic body and the contact body is a rectangle, and vertices of the rectangle of the piezoelectric element are not in contact with the first elastic body.

A vibration wave motor includes a first elastic body 111 and a second elastic body 112, a piezoelectric element (electromechanical energy conversion element) 113 sandwiched between the first elastic body 111 and the second elastic body 112, and a contact body configured to be in pressure contact with the first elastic body 111, an outer shape of a cross section (XY plane) in the piezoelectric element (113) perpendicular to a pressure direction (Z direction) in pressure contact between the first elastic body (111) and the contact body is a rectangle, and vertexes (1131-1134) of the rectangle of the piezoelectric element (113) are not in contact with the first elastic body (111).

A lens apparatus comprises a second lens unit and a fourth lens unit supported so as to be movable in an optical axis direction, a vibration wave motor unit configured to drive the second lens unit, a VCM configured to drive the fourth lens unit, a fixed barrel that supports the vibration wave motor unit and the VCM, a booster transformer constituting the vibration wave motor unit, an inductor constituting the VCM, and a flexible printed circuit board on which the booster transformer and the inductor are mounted. At least one of the vibration wave motor unit and the VCM overlaps at least one of the booster transformer and the inductor when viewed from the optical axis direction.

A vibrator includes an electromechanical transducer which is a piezoelectric ceramic made of sodium-potassium niobate metal oxides and whose temperature characteristics of a relative permittivity is 500 [ppm / ° C.] or less in absolute value in a temperature range from −40° C. to 170° C., wherein excitation of the electromechanical transducer produces a vibration wave. Another vibrator includes an electromechanical transducer which is a piezoelectric ceramic made of sodium-potassium niobate metal oxides and whose temperature characteristics of a relative permittivity is 390 [ppm / ° C.] or less in absolute value in a temperature range from 0° C. to 60° C., wherein excitation of the electromechanical transducer produces a vibration wave.

A vibrator includes an electromechanical transducer which is a piezoelectric ceramic made of sodium-potassium niobate metal oxides and whose temperature characteristics of a relative permittivity is 500 [ppm / ° C.] or less in absolute value in a temperature range from −40° C. to 170° C., wherein excitation of the electromechanical transducer produces a vibration wave. Another vibrator includes an electromechanical transducer which is a piezoelectric ceramic made of sodium-potassium niobate metal oxides and whose temperature characteristics of a relative permittivity is 390 [ppm / ° C.] or less in absolute value in a temperature range from 0° C. to 60° C., wherein excitation of the electromechanical transducer produces a vibration wave.