Drive control device and ultrasonic motor system
AssigneeMurata Manufacturing Co., Ltd.
InventorsMitsushiro Terasawa, Yuzo Mizushima, Takahito Kushima
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Abstract
A drive control device is provided that vibrates a vibrating body by applying signals having mutually different phases to a plurality of electrodes provided at a piezoelectric element on the vibrating body. The drive control device includes a signal application unit that selectively applies a signal to an electrode of the plurality of electrodes; an amplitude detection unit that receives a feedback signal from an electrode different from the electrode to which the signal application unit has performed selective application; and a signal condition control unit that controls a condition of a signal to be applied by the signal application unit based on the feedback signal.
Claims18
A drive control device that applies signals having mutually different phases to a plurality of electrodes disposed on a piezoelectric element on a vibrating body, the drive control device comprising:
- a signal application unit configured to selectively apply a signal to an electrode of the plurality of electrodes;
- a feedback signal reception unit configured to receive a feedback signal from an electrode different from the electrode to which the signal application unit has selectively applied the signal;
- and
- a signal condition control unit configured to receive and use the feedback signal to control a condition of a control signal to be applied by the signal application unit to control vibration of the vibrating body,
- wherein the signal application unit is further configured to apply the signal to the plurality of electrodes to include an A-phase signal and a B-phase signal, and the plurality of electrodes include an A-phase electrode to which the A-phase signal is applied and a B-phase electrode to which the B-phase signal is applied.
An ultrasonic motor system comprising:
- a vibrating body having a piezoelectric element;
- a plurality of electrodes disposed on the piezoelectric element;
- and
- a drive control device that includes at least one microcomputer configured to provide:
- a signal application unit configured to selectively apply a signal to an electrode of the plurality of electrodes;
- a feedback signal reception unit configured to receive a feedback signal from an electrode that different from the electrode to which the signal application unit has selectively applied the signal;
- and
- a signal condition control unit configured to receive and use the feedback signal to control a condition of a control signal to be applied to control a vibration of the vibrating body,
- wherein the ultrasonic motor system comprises no feedback electrode.
Dependencies are inferred from the claim text.