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US 9,853,576 B2Granted
Control apparatus of vibration-type actuator and control method of vibration-type actuator
AssigneeCanon Kabushiki Kaisha
InventorShinya Kudo
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AssigneeCanon Kabushiki Kaisha
InventorShinya Kudo
Estimating the term…
Provided is a control apparatus of a vibration-type actuator for generating an elliptical motion of contact portions by a common alternating current including a frequency determining unit for setting a frequency of the alternating current. The frequency determining unit sets the frequency of the alternating current for changing an ellipticity of the elliptical motion, within a frequency range such that ellipticity changing frequency ranges set for the vibrators are overlapped, and the ellipticity changing frequency ranges are set for the vibrators as frequency ranges between an upper limit and a lower limit, such that the lower limit is a maximum resonant frequency at a time of changing the ellipticity, and the upper limit is larger than the lower limit and is a maximum frequency for the relative movement of the driving member.
An apparatus comprising:
An apparatus comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Producing linear motion, e.g. actuators; Linear positioners ; Linear motors: drive circuits; Control arrangements or methods
Driving devices, e.g. vibrators: using only bending modes
Electrical details, e.g. drive or control circuits or methods: means for controlling vibration frequency or phase, e.g. for resonance tracking
Producing linear motion, e.g. actuators; Linear positioners ; Linear motors: by pressing one or more vibrators against the driven body
About 4 years 7 months of term left · ends 12 May 2031 (estimated)
Field of the Invention
The present invention relates to a control apparatus of a vibration-type actuator and a control method of a vibration-type actuator.
Description of the Related Art
FIG. 1 is a perspective view illustrating the external configuration of a vibration-type actuator according to a first exemplary embodiment of the present invention.
FIG. 2 is a graph illustrating the relationship between the drive frequency and driving speed of a vibrator in the vibration-type actuator.
FIG. 3 is a block diagram illustrating the configuration of a control apparatus of the vibration-type actuator according to the first exemplary embodiment of the present invention.
Preferred embodiments of the present invention will now be described in detail in accordance with the accompanying drawings.
The configuration of a control apparatus of a vibration-type actuator according to a first exemplary embodiment of the present invention will be described with reference to FIG. 1.
The vibration-type actuator according to the present exemplary embodiment includes a plurality of vibrators each at least with an electromechanical energy transducer and an elastic member.