Panasonic Intellectual Property Management Co., Ltd.

Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Maxell, Ltd.

Yasushi Kato

Yuichi Yoshikawa

Yasuyuki Yokouchi

Hirokazu Yamauchi

Mitsuoki Hishida

Keiichiro Nukada

Masahiro Yasohara

Kiyomi Kawamura

Kazuhiro Nobori

Satoshi Ikeda

Ryuta Sasaki

Yasufumi Nakajima

Yuji Tanaka

Hiroshi Murakami

Toru Tazawa

Hu Li

Kazuyuki Takada

Hiroaki Kawasaki

Haruhiko Kado

Sadahiro Matsuura

Mitsuhiro Sakamoto

Ryutaro Arakawa

Kouji Takada

Daisuke Sonoda

Shinichi Emura

Noritaka Aso

Akihiro Ochiai

Takayuki Suginome

Tomoya Hosokawa

Yusuke Baba

Toshiki Tubouchi

Akira Inaba

Hiroyuki Hirama

A lens unit that includes an optical element including at least a lens group in which a plurality of lenses are arranged along an optical axis; and a cylindrical lens barrel having an inner accommodation space for accommodating and holding the optical element, and the lens group includes a first lens located closest to the object side thereof; and a second lens adjacent to the first lens on the image side thereof, and optical elements and/or the optical element and the lens barrel are bonded to each other in an airtight state, such that an inter-lens space between the first lens and the second lens is sealed to the outside.

Lens unit and camera module

A motor includes a stator including a stator core and teeth respectively protruding from the stator core in predetermined directions of protrusion, and coils respectively wound onto the teeth n (n is an integer of 3 or greater) turns including first to n-th turns. A k-th (k is an integer, 1&#x3c;k&#x3c;n) turn of each of the coils lies at a center of a range wound with each of the coils onto the teeth in a corresponding one of the directions of protrusion of the teeth from the stator core. Each of the first turn and the n-th turn when each of the coils is cut in a corresponding one of the directions of protrusion of the teeth is greater in cross-sectional area than the k-th turn.

Motor

A motor includes a stator core, teeth respectively protruding from the stator core, and coils respectively wound onto the teeth n (n is an integer of 2 or greater) turns including first to n-th turns. Within each of ranges respectively wound with the coils onto the teeth in directions of protrusion of the teeth from the stator core, the first turn of each of the coil lies adjacent to a center of the motor. A k-th (k is an integer, 1&#x3c;k&#x2264;n) turn of each of the coils lies opposite to the center of the motor. The first turn when each of the coils is cut in a corresponding one of the directions of protrusion of the teeth from the stator core is greater in cross-sectional area than each of the k-th turn and the n-th turn.

A motor includes a stator including a stator core and teeth respectively protruding from the stator core, and coils respectively wound onto the teeth n (n is an integer of 3 or greater) turns. In a cross section in a first direction representing each of directions of protrusion of the teeth from the stator core, a k-th (k is an integer, 1&#x3c;k&#x3c;n) turn of each of the coils lies at a center of a range wound with each of the coils onto the teeth in the first direction. The k-th turn of each of the coils is greater in cross-sectional area than each of a first turn and an n-th turn.

A motor control device which controls a motor for driving a blower unit, comprises: a target motor output calculating section which calculates a target motor output which causes an air flow of air supplied from the blower unit to coincide with a target air flow; and an operation command generating section which obtains the motor output of the motor, and generates a command for controlling a physical amount of the motor such that the motor output coincides with the target motor output based on a result of comparison between the motor output and the target motor output; and the target motor output calculating section is configured to calculate the target motor output as a product of a polynomial of variables derived by dividing the target air flow by the motor speed, and a cube of the motor speed.

Motor control device, motor control method, and blower apparatus

A motor drive circuit includes; a rotor position detector that detects a position of a rotor and outputs a rotor position detection signal; a rotor position signal generator that generates signals P, P, P, P, P, and Pas a rotor position signal based on the rotor position detection signal output from the rotor position detector; a rotation direction recognition unit that recognizes a rotation direction of the rotor each time one of signals P, P, P, P, P, and Pis input and replaces the rotor position signal with a corrected rotor position signal; and a winding current output unit that outputs a current to a winding based on the corrected rotor position signal.

Motor drive circuit, brushless motor drive device provided with motor drive circuit, and motor control method

A permanent-magnet-embedded electric motor includes a stator having a coil wound on a stator core, and a rotor disposed rotatably inside the stator through a gap to an inner circumferential surface of the stator core. The rotor is provided with a rotor core formed of laminated steel plates having a plurality of magnet-embedding holes, and a permanent magnet housed and retained in each of the magnet-embedding holes. A thickness of the bridge portions formed between edges of the magnet-embedding holes and an outer circumference of the rotor core, and a thickness of a thinned link portion connecting adjoining two of the bridge portions are thinner than a thickness of the steel plates.

Permanent-magnet-embedded electric motor and method for manufacturing same

A motor controller of the present invention comprises units which obtain information indicative of a motor speed (&#x3c9;) and information indicative of motor torque (T), an air flow calculation section which calculates an air flow (Q) of a fan based on the motor speed (&#x3c9;) and the motor torque (T); and a speed command generation section which generates a speed command (&#x3c9;*) of a motor such that the air flow (Q) coincides with the predetermined air flow command (Q*).

Motor controller and motor control method

A motor drive device of the present invention includes a speed signal generator that generates a rotation speed signal indicating rotation speed; a PWM signal generator that acts on the power switch unit to control the power switch unit so as to generate coil-applied voltage; and a phase advance information generator that has characteristic curve information representing changes of rotation speed of and load on a brushless motor, preliminarily set. The phase advance information generator generates phase advance information according to the load characteristic curve to variably control the phase advance (the phase of voltage applied to the coils of the brushless motor, relative to the induced voltage phase) according to the load characteristic curve.

Motor drive device and brushless motor equipped with same, and air conditioner

A motor driving device of the present invention is a motor driving device that incorporates so-called vector control of controlling a current applied to a motor winding in accordance with the position of a rotor. The motor driving device receives the input of a duty command value from a host controller via a command input port, for example. The motor driving device obtains a current command or a speed command as a command value such that the input duty command value is equal to the duty of a drive pulse output from an inverter. Then, the motor driving device performs vector control based on the obtained command value.

Motor driving device and brushless motor

A fan motor includes a pair of fans axially mounted to both sides of a rotary shaft of the motor. The motor includes an inner rotor placed inside a stator wound with windings and an outer rotor placed outside the stator. The motor thus has a dual-rotor structure where the inner rotor and the outer rotor are held such that both the rotors can rotate on the rotary shaft.

Fan motor and blower including the same motor

A motor control device controls a fan motor, and controls a motor speed so as to maintain a predetermined airflow value. For this, the motor control device includes an input terminal for inputting a first operation parameter indicating the motor speed or a second operation parameter indicating a motor torque. Moreover, the motor control device includes a motor-speed target value arithmetically-operating unit that calculates, using a predetermined airflow value and the motor torque, a necessary modified value for the motor speed at the predetermined time intervals. Further, the motor control device includes an output terminal that outputs an instruction speed of the motor based on the necessary modified value.

Motor control device, its control method, and motor device

An electronic circuit device comprises: a semiconductor element having a first surface and a second surface, with the first and second surfaces being on first and second sides of the semiconductor element, respectively, and facing in opposite directions; a first electrode on the first surface; a second electrode on the second surface; a first circuit board electrically connected to the first electrode via a metallic plate such that the metallic plate and the semiconductor element are on the first circuit board; a second circuit board on the second side of the semiconductor element, the second circuit board having a control circuit for the semiconductor element; and a metallic wire for directly electrically interconnecting the second electrode and the second circuit board.

Electronic circuit device having circuit board electrically connected to semiconductor element via metallic plate

Bumps are formed on electrodes of semiconductor elements, and moreover, the semiconductor elements with the bumps are electrically connected to metallic members having installation members, whereby wiring lines are eliminated. Stray inductance and conduction resistance resulting from wiring lines can be reduced. A conventional dented connector and a projecting connector are eliminated by connecting the installation members to a second circuit board, thereby enabling an electronic circuit device of a power control system to be made compact.

Electronic circuit device including metallic member having installation members

A motor is equipped with a magnetic-flux detector, which detects magnetic fluxes from magnets of the motor. A position signal converter finds a position of the motor using a value detected by magnetic-flux detector. A speed controller throws the motor in sine wave drive using the detected motor position.

Growing community of inventors

Kyoto, Japan

Yasushi Kato