About Ultrasonic Motor
Typical Feature
High Torque and Low Speed
The feature of Ultrasonic Motor is high torque at the low speed of 10 - several 100 [rpm].
Neither reduction gears nor a brake is needed, and the direct drive is possible.
It is possible to make the actuator of the backlash 0.
High Holding Power with no electric current
Ultrasonic Motor keeps up high holding power, also in the condition that the power is turned off.
For this reason, a brake and a clutch are unnecessary to an ultrasonic motor.
It is possible to make a lightweight actuator without an electromagnetic brake or a clutch.
High Response and High Controllability
Because the inertia of a rotor is small and the braking effort by friction between rotor stators is large,
the response at the time of a stop is excellent.
Because speed control is stepless, and a mechanical time constant is also below 1 [ms],
it is very excellent also in controllability.
For this reason, highly accurate speed control and position control are possible.
Usable in a High Magnetic Field and Not generate Electromagnetic Waves.
Since neither winding nor a magnet nor a coil is used, an ultrasonic motor does not generate electromagnetic waves.
Specially, since a nonmagnetic type ultrasonic motor does not use a magnetic material at all, it operates without being affected in a high magnetic field environment by the influence of magnetic.
Small, Thin and Lightweight
Compared with the Electromagnetism Motor of torque of the same degreea, Ultrasonic Motor is Small, Thin, and Weight is several percent.
By using as an articulated robot's arm or an actuator of a leg, weight of each joint can be made light.
Improvement in the response of a robot or the whole system and improvement in weight capacity are expectable by adopting Ultrasonic Motor.
High Silence
Because vibration used for a drive is the frequency of a non-auditory area, its operation sound is very quiet.
Moreover, it is possible to avoid generating of the noise of a drive by not using a gear.
High Torque and Low Speed
The feature of Ultrasonic Motor is high torque at the low speed of 10 - several 100 [rpm].
Neither reduction gears nor a brake is needed, and the direct drive is possible.
It is possible to make the actuator of the backlash 0.
High Holding Power with no electric current
Ultrasonic Motor keeps up high holding power, also in the condition that the power is turned off.
For this reason, a brake and a clutch are unnecessary to an ultrasonic motor.
It is possible to make a lightweight actuator without an electromagnetic brake or a clutch.
High Response and High Controllability
Because the inertia of a rotor is small and the braking effort by friction between rotor stators is large,
the response at the time of a stop is excellent.
Because speed control is stepless, and a mechanical time constant is also below 1 [ms],
it is very excellent also in controllability.
For this reason, highly accurate speed control and position control are possible.
Usable in a High Magnetic Field and Not generate Electromagnetic Waves.
Since neither winding nor a magnet nor a coil is used, an ultrasonic motor does not generate electromagnetic waves.
Specially, since a nonmagnetic type ultrasonic motor does not use a magnetic material at all, it operates without being affected in a high magnetic field environment by the influence of magnetic.
Small, Thin and Lightweight
Compared with the Electromagnetism Motor of torque of the same degreea, Ultrasonic Motor is Small, Thin, and Weight is several percent.
By using as an articulated robot's arm or an actuator of a leg, weight of each joint can be made light.
Improvement in the response of a robot or the whole system and improvement in weight capacity are expectable by adopting Ultrasonic Motor.
High Silence
Because vibration used for a drive is the frequency of a non-auditory area, its operation sound is very quiet.
Moreover, it is possible to avoid generating of the noise of a drive by not using a gear.
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