JPS6477481A - Ultrasonic motor - Google Patents

Ultrasonic motor

Info

Publication number
JPS6477481A
JPS6477481A JP62233846A JP23384687A JPS6477481A JP S6477481 A JPS6477481 A JP S6477481A JP 62233846 A JP62233846 A JP 62233846A JP 23384687 A JP23384687 A JP 23384687A JP S6477481 A JPS6477481 A JP S6477481A
Authority
JP
Japan
Prior art keywords
piezoelectric ceramic
disk
ceramic disk
motor
stator
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.)
Granted
Application number
JP62233846A
Other languages
Japanese (ja)
Other versions
JPH0697864B2 (en
Inventor
Sadayuki Takahashi
Takeshi Inoue
Osamu Myoga
Osamu Onishi
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 JP62233846A priority Critical patent/JPH0697864B2/en
Publication of JPS6477481A publication Critical patent/JPS6477481A/en
Publication of JPH0697864B2 publication Critical patent/JPH0697864B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To prevent the leakage of vibrational energy, and to improve the efficiency of a motor by specifying the ratio of the outside diameter to the inside diameter of a ring for an ultrasonic motor using a piezoelectric ceramic ring as a stator. CONSTITUTION:A column 14 is insetted into a hole section at the central section of a piezoelectric ceramic disk 11, and the end face of the column is fixed. The piezoelectric ceramic disk 11 is polarized in the thickness direction, and metallic electrode films 12 divided into four sections are mounted oppositely to upper and lower surfaces. A rotor 13 is fitted around the disk 11 so as to be circumscribed with the disk. The electrode films are connected electrically, AC electric signals sinomegat, cosomegat, phase of which differs at 90 deg., are input respectively to electrode terminals 15, 16, and in-plane flexural oscillation is excited in the piezoelectric ceramic disk. Consequently, the rotor 13 is turned while the piezoelectric ceramic disk is employed as a stator. The ratio of the outside diameter D to the inside diameter (d) of the piezoelectric ceramic disk is selected within a range of d/D=0.475+ or -0.025 at that time, thus preventing the transmission of vibrational energy over a supporter 14, then acquiring a motor having an excellent efficiency.
JP62233846A 1987-09-18 1987-09-18 Ultrasonic motor Expired - Lifetime JPH0697864B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62233846A JPH0697864B2 (en) 1987-09-18 1987-09-18 Ultrasonic motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62233846A JPH0697864B2 (en) 1987-09-18 1987-09-18 Ultrasonic motor

Publications (2)

Publication Number Publication Date
JPS6477481A true JPS6477481A (en) 1989-03-23
JPH0697864B2 JPH0697864B2 (en) 1994-11-30

Family

ID=16961485

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62233846A Expired - Lifetime JPH0697864B2 (en) 1987-09-18 1987-09-18 Ultrasonic motor

Country Status (1)

Country Link
JP (1) JPH0697864B2 (en)

Cited By (4)

* 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
JPH0580192U (en) * 1992-03-30 1993-10-29 株式会社田村電機製作所 Ultrasonic motor
US5719462A (en) * 1993-02-05 1998-02-17 Nikon Corporation Ultrasonic motor having improved stator
US6186753B1 (en) * 1999-05-10 2001-02-13 Scroll Technologies Apparatus for minimizing oil leakage during reverse running of a scroll compressor

Cited By (4)

* 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
JPH0580192U (en) * 1992-03-30 1993-10-29 株式会社田村電機製作所 Ultrasonic motor
US5719462A (en) * 1993-02-05 1998-02-17 Nikon Corporation Ultrasonic motor having improved stator
US6186753B1 (en) * 1999-05-10 2001-02-13 Scroll Technologies Apparatus for minimizing oil leakage during reverse running of a scroll compressor

Also Published As

Publication number Publication date
JPH0697864B2 (en) 1994-11-30

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