Structural error compensation control method of space phase modulation annular traveling wave ultrasonic motor

An ultrasonic motor and error compensation technology, applied in the direction of generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc., can solve problems such as space phase errors

Inactive Publication Date: 2013-05-29
SOUTHEAST UNIV
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[0003] 1. Spat

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  • Structural error compensation control method of space phase modulation annular traveling wave ultrasonic motor
  • Structural error compensation control method of space phase modulation annular traveling wave ultrasonic motor
  • Structural error compensation control method of space phase modulation annular traveling wave ultrasonic motor

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Embodiment Construction

[0054] The present invention will be further described below in conjunction with the accompanying drawings.

[0055] like figure 1 As shown, the motor includes an end cover 1, a bearing 1 2, a bearing 2 3, a rotating shaft 4, a rotor 5, a stator 6, a base 7, and piezoelectric ceramics. Except for the polarization division of piezoelectric ceramics, other structures, materials and assembly schemes of the motor are completely consistent with traditional ultrasonic motors. The piezoelectric ceramics of the motor are divided into A-zone piezoelectric ceramics 8 and B-zone piezoelectric ceramics 9 . like figure 2 As shown, when the motor is working, space traveling waves with nine wavelengths are distributed on the circumference of the stator. If each traveling wave wavelength is counted as a space phase of 2π, the entire circumference can be counted as a space phase of 18π. According to the clockwise direction, define the starting position of the piezoelectric ceramic 8 in the...

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Abstract

The invention discloses a structural error compensation control method of a space phase modulation annular traveling wave ultrasonic motor. Piezoelectric ceramics are divided into an A area and a B area, two power supply excitations with same time phase and adjustable amplitude values are exerted on the A area, one power supply excitation or two power supply excitations with the same amplitude value and time phase is/are exerted on the B area, the power supply difference between the A area and the B area is a pi/2 time phase difference, and space synthesized error standing waves caused by structural errors of the motor are decomposed into two standing wave components with fixed positions for compensation respectively. By means of the structural error compensation control method of the space phase modulation annular traveling wave ultrasonic motor, the defect that traditional schemes for correcting errors through mechanical structures are unrecoverable and not visual is avoided, the error correcting difficulty is reduced, continuous error compensating is achieved, small errors can be effectively compensated, the structural errors are compensated by control signals, and thereby means can be provided for on-line error compensation of the motor.

Description

technical field [0001] The invention relates to the field of ultrasonic motor control, in particular to a structural error compensation control method for a space phase-modulated annular traveling wave ultrasonic motor. Background technique [0002] There are various structural errors in the manufacturing process of ultrasonic motors, which will generate additional standing waves in the motor. In order to reduce the impact of structural errors on the performance of the motor, the conventional method is to improve the technical level of the motor, and to weaken and eliminate these errors through the correction of the mechanical structure. If these standing waves can be eliminated by means of control and "pure" traveling waves can be generated on the motor stator, the performance of the motor can be improved more conveniently. [0003] 1. Spatial phase error [0004] When the piezoelectric ceramics of the ultrasonic motor have errors in the partitioning and installation proc...

Claims

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Application Information

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IPC IPC(8): H02N2/14
Inventor 胡敏强陆旦宏徐志科蒋春荣金龙
Owner SOUTHEAST UNIV
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