公开(公告)号：US20010013740A1

公开(公告)日：2001-08-16

申请号：US09776358

申请日：2001-02-02

Applicant: ASMO CO., LTD.

Inventor： Takashi Fukui ,  Kouichi Ikeda

IPC: H02N002/00

CPC classification number: H02N2/166

Abstract: An ultrasonic motor includes a stator, which includes a piezoelectric element, and a rotor, which opposes the stator. The piezoelectric element vibrates the stator to rotate the rotor. The rotor has an annular thin section. An elastic ring is secured to the thin section. The mass of the elastic ring is selected from a predetermined range of masses. The motor speed at which a predetermined level of noise is produced by the motor is substantially constant for the range of the masses. This reliably damps undesirable vibration of the motor.

Abstract translation: 超声波马达包括与定子相对的包括压电元件的定子和转子。 压电元件使定子振动以使转子旋转。 转子具有环形薄部分。 弹性环固定在薄壁部分上。 弹性环的质量从预定的质量范围中选择。 马达产生预定水平的噪声的马达速度在质量范围内基本上是恒定的。 这可靠地阻止电机的不期望的振动。