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41. 发明专利

JPH05168256A ULTRASONIC MOTOR 失效
公开(公告)号：JPH05168256A
公开(公告)日：1993-07-02
申请号：JP32872591
申请日：1991-12-12
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAKEDA KATSU , SUMIHARA MASANORI , NISHIKURA TAKAHIRO , KAWASAKI OSAMU
IPC分类号： H02N2/00
摘要： PURPOSE:To obtain an ultrasonic motor with a stable operation and an improved drive efficiency where a location for mounting a lead wire is carefully selected for preventing any unbalancing from occurring between drive electrodes due to influence of a mass etc. of the lead wire. CONSTITUTION:A title item is an ultrasonic motor which allows two standing waves (undulation alpha,gamma) to be excited by feeding a bi-phase AC voltage to a piezoelectric body 2 with bi-phase electrodes A and B and a space electrode C. Then, when lead wires of A, B, and C phases feeding power to the piezoelectric body 2 are provided at (a, b2, and (c) which are at a same angle difference position for a node of the standing wave, an ultrasonic motor with a stable operation and an improved drive efficiency can be obtained.

42. 发明专利

JPH05122957A ULTRASONIC MOTOR 失效
公开(公告)号：JPH05122957A
公开(公告)日：1993-05-18
申请号：JP28592291
申请日：1991-10-31
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： NISHIKURA TAKAHIRO , TAKEDA KATSU , SUMIHARA MASANORI , KAWASAKI OSAMU
IPC分类号： H02N2/00 , H01L41/09 , H02N2/16
摘要： PURPOSE:To provide an ultrasonic motor which stabilizes the oscillation in braking mode and facilitates the driving of low resonance impedance, and is excellent in mass production, and is stable in property in case of having used an oscillator consisting of an elastic body, which oscillates the elastic progress wave of primary, in diametrical direction, and tertiary or more, in circumferential direction, elastic progressive wave, and a piezoelectric substance. CONSTITUTION:It becomes hard to be influenced by load ripple by arranging the projection 4 provided in an oscillator 3 in the position that it does not reach the inside and outside diameters of the oscillator 3. Moreover, the resonance impedance is lowered by fixing the center of the oscillator securely, and the it is made to hardly excite other oscillation mode. Furthermore, the displacement of the oscillation is enlarged by providing one part of the oscillator with a thin part, and by the drop of the mechanical rigidity, the low resonance impedance promotion is materialized.

43. 发明专利

JPH0576189A ULTRASONIC MOTOR 失效
公开(公告)号：JPH0576189A
公开(公告)日：1993-03-26
申请号：JP7204892
申请日：1992-03-30
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SUMIHARA MASANORI , TAKEDA KATSU , NISHIKURA TAKAHIRO , KAWASAKI OSAMU
IPC分类号： H02N2/00
摘要： PURPOSE:To improve the efficiency and the life by constituting a mover of a carbon fiber reinforcing resin complex simple, and making it have the elasticity in accord with the pressure of an ultrasonic motor in the direction of the pressurization of the mover. CONSTITUTION:A mover 13 made of carbon fiber reinforcing resin has elasticity in the direction of pressurization (vertical direction to the face A) since it is made in beam structure of both-end support. That is, the mover is composed of a mover beam part 10, the first projections 11 extended from both ends of the beam part 10, and the second projections 12 extended from the beam part 10 on the side of contact face with a vibrator 16. And the mover 13 receives the force of being pressed against the vibrator 16 through the face A of the first projection 11, and contacts with the vibrator 16 with the second projection 12. In this case, it is to be desired that the flexural elastic modulus of the material of the mover 13 should be 1000kg/mm -7000kg/mm . Hereby, the efficiency and the life of the motor can be improved.

44. 发明专利

JPH04347584A ULTRASONIC MOTOR 失效
公开(公告)号：JPH04347584A
公开(公告)日：1992-12-02
申请号：JP11826291
申请日：1991-05-23
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SUMIHARA MASANORI , TAKEDA KATSU , NISHIKURA TAKAHIRO , KAWASAKI OSAMU
IPC分类号： H02N2/00
摘要： PURPOSE:To provide a circular type ultrasonic motor in which problems of generation of noise due to difficulty in uniform contact of a vibrator with a moving element, a decrease in the efficiency of a motor are eliminated, and which is light in weight, and high in output transmission efficiency and simple in manufacturing process in the motor for generating driving force by exciting an elastic wave using a piezoelectric element such as piezoelectric ceramic. CONSTITUTION:A moving element 7 is formed of a moving element beam 8, and moving element first protrusions 9 extended from both ends of the beam 8. The vibrator 10 is pressurized through a surface A of the protrusion 9, and the vibrator 10 is brought into contact with the beam 8. The element is formed in a beam structure of both-end supporting conditions to provide an effect (a surface correcting effect) to absorb waviness of the contact surface of the vibrator with the element. Thus, a stably uniform contact is obtained, and an ultrasonic motor having long term reliability, can be obtained.

45. 发明专利

JPH04344183A DRIVE CIRCUIT OF ULTRASONIC MOTOER 失效
公开(公告)号：JPH04344183A
公开(公告)日：1992-11-30
申请号：JP11727791
申请日：1991-05-22
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAKEDA KATSU , SUMIHARA MASANORI , NISHIKURA TAKAHIRO , KAWASAKI OSAMU
IPC分类号： H02N2/00
摘要： PURPOSE:To provide an ultrasonic motor with good responding properties and stable motion in the driving method of the ultrasonic motor using an elastic vibration excited by a piezoelectric body as driving force. CONSTITUTION:An apparatus is equipped with a series circuit composed of resistors 107, 109 in parallel with an ultrasonic motor and of transistors 108, 110 being switching elements on the output side of step-up transformers 104, 106. When the switching elements are changed from OFF state to ON state at the time of stopping of a driving signal so that electrical energy is consumed by the resistors and a bending vibration excited in the ultrasonic motor is stopped, it is possible to improve responding properties of the ultrasonic motor.

46. 发明专利

JPH04322179A METHOD OF DRIVING ULTRASONIC MOTOR 失效
公开(公告)号：JPH04322179A
公开(公告)日：1992-11-12
申请号：JP9037591
申请日：1991-04-22
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KAWASAKI OSAMU , NISHIKURA TAKAHIRO , SUMIHARA MASANORI , TAKEDA KATSU
IPC分类号： H02N2/00
摘要： PURPOSE:To provide a method of driving an ultrasonic motor which gets stable start and stationary property by applying a voltage higher than that at steady state at start, and seeing that it does not pass an unstable region in the middle of the start. CONSTITUTION:When a start signal is provided, a sweep indicator 14 outputs a voltage signal Cv, and an oscillation controller 13 outputs a frequency signal Cf to a voltage control oscillator 7, and sets the frequency f0 and the voltage value V1 of the voltage to be applied to an ultrasonic motor 11 to a value higher than the frequency that the motor shows instability and the value higher than the stationary voltage to drive the motor stably, respectively. Next, the sweep indicator 14 sweeps f0 and V1 toward lower values, and starts the motor, and at the point of time when the current flowing to the driving electrode has reached the specified value i1, it stops the sweep, and after that, it controls f0 and V1 so that the current may keep V1 and operates the motor stably.

47. 发明专利

JPH0449872A ULTRASONIC WAVE MOTOR 失效
公开(公告)号：JPH0449872A
公开(公告)日：1992-02-19
申请号：JP15597590
申请日：1990-06-14
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SUMIHARA MASANORI , TAKEDA KATSU , NISHIKURA TAKAHIRO
IPC分类号： H01L41/09 , H02N2/00
摘要： PURPOSE:To simplify a manufacturing process due to the omission of the reduc ing and bonding process of the number of the component parts of a moving body, and lighten the weight of a motor, and obtain the efficient and stable ultrasonic wave motor by forming the moving body, with a fiber reinforced resin complex reinforced with the use of carbon fibers at least. CONSTITUTION:A moving body 24 is formed with a carbon fiber reinforced resin complex. A reason for using carbon fibers is to enhance the rigidity of a frictional contact surface and to improve the mechanical strength of the moving body 24. It is molded by using a metallic mold, as a working method. Besides, compared with a conventional moving body, the weight of the moving body 24 can be reduced. Besides, the progressive wave of deflection oscillation due to an oscillating body 23 can be transmitted to the moving body 24 efficient ly, and also on driving for a long time, stable motor characteristic can be kept. It is desirable that the including quantity of the carbon fibers is 10weight% or more and 70weight% or less. As a result, the characteristic is stabilized, and a manufacturing process can be simplified due to the reduction of the number of the component parts of the moving body and the omission of a bonding process, and the weight of a motor can be lightened.

48. 发明专利

JPH03273880A SUPERSONIC MOTOR 失效
公开(公告)号：JPH03273880A
公开(公告)日：1991-12-05
申请号：JP7520890
申请日：1990-03-22
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KAWASAKI OSAMU , NISHIKURA TAKAHIRO , SUMIHARA MASANORI , TAKEDA KATSU
IPC分类号： H01L41/09 , H02N2/00
摘要： PURPOSE:To enable speed to be improved as compared with a case without any protruding body by determining a shape of an elastic substrate and the protruding body so that a specific relation can be established by setting a distance from a neutral surface within the elastic substrate to a surface of the elastic substrate to h1, a height of the protruding body to h2, a width between roots of the protruding body to w1, and a width of a root of the protruding body to w2. CONSTITUTION:A distance from a neutral surface within an elastic substrate 101 to a surface of the elastic substrate is set to h1; a height of a protruding body 103 to h2; a width between roots of the protruding body 103 to w1; a width of a root of the protruding body 103 to w2. A vibrating body 104 deflects only at a part where the width if w2. When distortion at this part is set to a value which is within the same breakdown limitation as that without the protruding body 103, an amplitude A' when there is the protruding body 103 is shown by IA'={w1/(w1+w2)} A as compared with an amplitude A without the protruding body 103. Thus, in normal case where a neutral surface position does not change greatly, a speed v1 where there is the protruding body 103 is as shown by an expression IIv0=h1kAomega and an expression IIIv1=(h1+h2)(w1/(w1+w2)kAomega=((h1+h2)/h1)(w1/(w1+w2))v0 as compared with a speed v0 without any traveling body. Therefore, the shape of the elastic substrate 101 and that of the protruding body 103 are determined so that an expression IV ((h1+h2)/ h1)(w1/(w1+w2))>1 may be satisfied.

49. 发明专利

JPH03273874A TORUS-TYPE SUPERSONIC MOTOR 失效
公开(公告)号：JPH03273874A
公开(公告)日：1991-12-05
申请号：JP7520190
申请日：1990-03-22
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： NISHIKURA TAKAHIRO , TAKEDA KATSU , SUMIHARA MASANORI , KAWASAKI OSAMU
IPC分类号： H02N2/00
摘要： PURPOSE:To obtain a machining accuracy by enabling machining of a vibrating body to be in a plane shape for simplification by providing a recessed part on a surface which is partially in contact with a traveling body for a width of the vibrating body. CONSTITUTION:A first elastic body 1 constitutes a torus-shaped vibrating body 3 along with a piezoelectric body 2 and a recessed part 4 is provided at the inside which does not reach an outer diameter in a width of a plane of the tours-shaped vibrating body 3. A vibrating body 5 is in contact with this vibrating body 3 through a friction material 8 by pressing. The amount of displacement of a vibration displacement in the radial direction of the torus- shaped plate vibrating body 3 becomes larger toward the outside since a primary vibration mode is in use. However, since mechanical rigidity changes in proportion to a power of three of the plate thickness by providing the recessed part 4 at the inside, the amount of displacement can be flattened in the radial direction so that a stable contact can be achieved even when the center is shifted due to poor accuracy of shaft. Also, since the traveling body is driven at the inside where the amplitude of the vibration body 3 is small, stable property against fluctuation of load can be achieved.

50. 发明专利

JPH02241377A ULTRASONIC WAVE LINEAR MOTOR 失效
公开(公告)号：JPH02241377A
公开(公告)日：1990-09-26
申请号：JP6176289
申请日：1989-03-14
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SUMIHARA MASANORI , KAWASAKI OSAMU , KOMENO HIROSHI
IPC分类号： H02N2/00
摘要： PURPOSE:To enhance efficiency by forming a resin layer on the surface of a machine output producing position, and producing an output therethrough. CONSTITUTION:An ultrasonic wave linear motor has an elastic square column 6 of square section, and piezoelectric ceramics 7a-8b are adhered to the side faces to compose a vibrator. The vibrator has position securing supporting holes 9a-9b, and machine output ends 10a-10b. Heat resistant resin layers 11 (e.g. ethylene tetrafluoride resin of 50mum) are formed on the surfaces of the ends 10a-10b.

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