Ultrasonic motor with two degrees of freedom, and drive method therefor
An ultrasonic motor, degree of freedom technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problems affecting the stability of ultrasonic motor, and improve the output torque. , The effect of convenient commutation control and large contact area
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[0025] A linear ultrasonic motor with two degrees of freedom in rotation: the stator is composed of two helical structures; the rotor is a tubular structure with an outer diameter slightly smaller than the inner diameter of the stator helix; the rotor passes through the interior of the two helixes; two helical stators, one left-handed , one right-handed, parameter symmetric, coaxial installation; the material of the spiral stator is metal, and the section is rectangular, square or circular.
[0026] The driving method of the two-degree-of-freedom ultrasonic motor is:
[0027] One end of the helical structure stator is connected to the ultrasonic vibrator, and the other end is connected to the vibration absorber or an excitation signal with a certain phase relationship with the vibrator is applied to excite the stator to generate traveling waves along the helix; the two helical stators are driven independently; the two helical The specifications and parameters of the drivers us...
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