Asmo Co., Ltd.

Denso Corporation

Toyota Jidosha Kabushiki Kaisha

Aisin Seiki Kabushiki Kaisha

Yoshihiro Adachi

Yukihide Ishino

Satoru Suzuki

Yoshiki Ninomiya

Junya Kasugai

Masaru Irie

Toshihiro Matsuura

Isahiko Tanaka

Nobuyuki Shiraki

Takeshi Hayashi

Takashi Nagaya

Yoshinobu Nagao

Takashi Fukui

Yoshitsugu Nakagawa

Michinori Ando

Nobumitsu Oda

Masahiko Komoda

Hiroyuki Furukoshi

Akihiko Seki

Tetsuji Yoshikawa

Terumitsu Takahashi

Masafumi Naito

Shingo Shimizu

Satoshi Morizaki

Tetsuya Honda

Kazutoshi Ito

Isoshi Soga

Takahiro Nozu

Shinichi Naito

Hironobu Kawai

Yuji Takemura

Akira Sugiura

Yuji Yamashita

An electrical contact device includes a high electric potential-side contact and a low electric potential-side contact having a lower electric potential than the high electric potential-side contact. The high electric potential-side contact and the low electric potential-side contact are configured to be brought into and out of contact with each other. At least one of the high electric potential-side contact and the low electric potential-side contact is formed of a low-boiling point material whose boiling point is lower than 2562&#xb0; C. or a mixed material that contains the low-boiling point material.

Electrical contact device and rotating electric machine including the electrical contact device

A brushless motor comprising: a rotor; a stator core disposed at a radial direction outside of the rotor, and a stator case. The stator core includes an outer ring shaped section, teeth sections projecting out from the outer ring shaped section toward a radial direction inside, and an inner ring shaped section extending from end portions of the teeth sections. Protruding portions are formed at the outer ring shaped section so as to project toward a radial direction outside and so as to be disposed at even intervals around a circumferential direction of the outer ring shaped section. The stator case is integrated together with the stator core by a plurality of plastic deformation portions formed at an outer peripheral portion of the stator case at locations facing towards the protruding portions, and the plastic deformation portions are disposed at even intervals along a circumferential direction of the stator case.

Brushless motor, stator, stator manufacturing method and brushless motor manufacturing method

A stator includes: plural core configuration sections each including plural yoke configuration sections that configure a ring shaped yoke and are segmented in a yoke circumferential direction and plural teeth sections that project from the respective yoke configuration sections along a yoke radial direction, with the plural yoke configuration sections and the plural teeth sections integrated together; plural coil wires that are wound onto the respective teeth sections to configure plural winding portions; and plural insulators that each include plural insulator portions that are integrated to each of the respective core configuration sections and insulate between the teeth sections and the winding portions, and a connection portion that connects together the plural insulator portions.

Stator, brushless motor, stator manufacturing method

A central location of a face detecting device comprises an image input means for inputting a captured face image, a horizontal edge detecting means for detecting a horizontal edge having a predetermined vertical length based on the face image inputted by the image input means; and a central location of a face detecting means for calculating an average value of a horizontal location data of the horizontal edge detected by the horizontal edge detecting means, and determining the average value as a central location of the face.

Central location of a face detecting device, method and program

A facial parts position detection device which includes an image inputting device for inputting a captured face image, an ends position detecting device for detecting right and left ends position of the face on the basis of the image, a facial parts region setting device for setting facial parts region indicating a region where facial parts exists on the basis of the right and left ends of the face, a horizontal edge detecting device for detecting a horizontal edge on the basis of the image inputted by the image inputting device, a horizontal edge histogram creating device for creating a horizontal edge histogram by projecting the horizontal edge in a horizontal direction, a proposed position setting device for setting a plurality of peaks of the horizontal edge histogram as proposed positions respectively, and an optimum position detecting device for detecting an optimum position of the facial parts region.

Facial parts position detection device, method for detecting facial parts position, and program for detecting facial parts position

A motor has a motor housing, a brush mechanism having a substrate, and a pair of electricity supply lines extending from the substrate. A first support portion, a second support portion and a third support portion are located about the central axis of the substrate. The substrate is supported by the housing with vibration absorbing members, each of which provided at one of the first to third support portions. The first support portion is located between the electricity supply lines. The second and third support portions are symmetrically located on both sides of a straight line that extends through the first support portion and the axis of the substrate. Therefore, the brush mechanism is prevented from being inclined, and vibration of the brush mechanism is effectively absorbed.

Supporting structure for brush mechanism in motor

An ultrasonic motor includes a stator having a piezoelectric element and a rotor facing the stator. The piezoelectric element is annular and is polarized into segments in the circumferential direction. A flexible plate is fixed to the piezoelectric element with an electrode plate in between. The flexible plate includes a flexible substrate, a conductor, and a reinforcement. The conductor is located on a part of the flexible substrate to be electrically connected to the electrode plate. The reinforcement is located on the flexible substrate at a position that is off the conductor. The reinforcement suppresses vibration generated at a part of the piezoelectric element that is off the conductor, thereby stabilizing vibration of the piezoelectric element in the circumferential direction.

Ultrasonic motor

When a motor is driven by a signal transmitted due to a switch turned on, a count value is added. When the motor is stopped, the count value is subtracted. When the count value is an upper limit value, the motor is continuously driven until the switch is changed to an off state. Subsequently, until the count value comes to a lower limit value, the motor is maintained in a stopped state even if the switch of the motor is changed to an on state. For this reason, generation of heat in the motor can be prevented.

Driving circuit of a motor

An ultrasonic motor includes a stator having a piezoelectric element and a rotor facing the stator. The piezoelectric element vibrates the stator to rotate the rotor. A lining member is located between the rotor and the stator. A spring is installed in the motor. The spring is deformed by a predetermined amount to press the rotor against the stator. The force of the spring pressing the rotor changes in accordance with the deformation of the spring. The spring is installed such that its deformation is in a predetermined range, so that, within the range, the urging force of the spring changes by a relatively small amount for a given change of deformation. Therefore, when deformation of the spring changes due to wearing of the lining member, the urging force of the disk spring scarcely changes. Accordingly, the rotation characteristics of the motor scarcely change over time.

Method for assembling ultrasonic motor

A method for driving a supersonic motor includes the steps of driving the supersonic motor by supplying a driving voltage of greater frequency than a resonant frequency (point) to a driving piezoelectric electric element. The driving frequency is decreased when a wave form distortion is not generated in an output signal of an oscillation detection piezoelectric element provided in an elastic body. The driving frequency is increased when a wave form distortion is generated in the output signal of the oscillation detection piezoelectric element.

Method and device for driving a supersonic motor

An ultrasonic motor is disclosed. A rotor is pressed into contact with a stator disposed within a housing for rotation in accordance with the electrostrictive deformation of the stator. A screw shaft integrally rotates with the rotor, to convert the rotation of the rotor into the linear movement of an external body. A radial bearing holds the screw shaft to the case in a rotatable manner about its axis. The radial bearing including an inner ring secured to the screw shaft and an outer ring secured to the case for transferring a thrust load from the screw shaft to the case.

A driving circuit for an ultrasonic motor is disclosed which utilizes a single transformer. A phase shifter frequency-divides the signal from an oscillator by N and generates a plurality of frequency divide signals having different phases. These divided signals are then used to control the driving of the piezoelectric element used to power the ultrasonic motor.

Ultrasonic motor driving circuit

Growing community of inventors

Hamamatsu, Japan

Yoshihiro Adachi