JPS6477485A - Ultrasonic motor - Google Patents

Ultrasonic motor

Info

Publication number
JPS6477485A
JPS6477485A JP62233850A JP23385087A JPS6477485A JP S6477485 A JPS6477485 A JP S6477485A JP 62233850 A JP62233850 A JP 62233850A JP 23385087 A JP23385087 A JP 23385087A JP S6477485 A JPS6477485 A JP S6477485A
Authority
JP
Japan
Prior art keywords
stator
rotor
square
compressive stress
vibrator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP62233850A
Other languages
Japanese (ja)
Inventor
Osamu Onishi
Osamu Myoga
Takeshi Inoue
Sadayuki Takahashi
Tadayasu Uchikawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP62233850A priority Critical patent/JPS6477485A/en
Publication of JPS6477485A publication Critical patent/JPS6477485A/en
Pending legal-status Critical Current

Links

Landscapes

  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)

Abstract

PURPOSE:To obtain a motor having strong revolving torque by mounting an annulus ring circumscribed so as to apply static compressive stress bias to an arcuate vibrator, in which the four corner sections of a square board are cut off and the corner sections are inscribed in a circle. CONSTITUTION:A stator 11 is composed of a square-shaped vibrator 40, and electrodes 51 divided into four sections and electric terminals 52, 52' and 53, 53' are mounted respectively onto both the upper and lower surfaces of a square- shaped piezoelectric ceramic board uniformly polarized in the thickness direction. A rotor 12 is brought into contact with the stator 11 by bolts 13, accompanying static compressive stress bias. AC voltage, phase of which differs at 90 deg. mutually, is applied to the stator 11 in resonance frequency at a degenerating double mode, thus forcibly exciting elliptical vibrations in two contact surfaces in the four contact surfaces of the stator 11 and the rotor 12, then turning the rotor by strong revolving torque.
JP62233850A 1987-09-18 1987-09-18 Ultrasonic motor Pending JPS6477485A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62233850A JPS6477485A (en) 1987-09-18 1987-09-18 Ultrasonic motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62233850A JPS6477485A (en) 1987-09-18 1987-09-18 Ultrasonic motor

Publications (1)

Publication Number Publication Date
JPS6477485A true JPS6477485A (en) 1989-03-23

Family

ID=16961550

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62233850A Pending JPS6477485A (en) 1987-09-18 1987-09-18 Ultrasonic motor

Country Status (1)

Country Link
JP (1) JPS6477485A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5130599A (en) * 1988-05-26 1992-07-14 Kohzi Toda Vibrator-type actuator
US5300851A (en) * 1991-10-31 1994-04-05 Matsushita Electric Industrial Co., Ltd. Linear-type actuator
US5719462A (en) * 1993-02-05 1998-02-17 Nikon Corporation Ultrasonic motor having improved stator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6185078A (en) * 1984-10-02 1986-04-30 Ngk Spark Plug Co Ltd Rotary driver
JPS61170285A (en) * 1985-01-24 1986-07-31 Matsushita Electric Works Ltd Piezoelectric linear motor
JPS62126872A (en) * 1985-11-25 1987-06-09 Matsushita Electric Works Ltd Piezoelectric motor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6185078A (en) * 1984-10-02 1986-04-30 Ngk Spark Plug Co Ltd Rotary driver
JPS61170285A (en) * 1985-01-24 1986-07-31 Matsushita Electric Works Ltd Piezoelectric linear motor
JPS62126872A (en) * 1985-11-25 1987-06-09 Matsushita Electric Works Ltd Piezoelectric motor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5130599A (en) * 1988-05-26 1992-07-14 Kohzi Toda Vibrator-type actuator
US5300851A (en) * 1991-10-31 1994-04-05 Matsushita Electric Industrial Co., Ltd. Linear-type actuator
US5719462A (en) * 1993-02-05 1998-02-17 Nikon Corporation Ultrasonic motor having improved stator

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