Minebea Mitsumi Inc.

Minebea Company, Limited

Tomoyuki Suzuki

Takayuki Matsui

Yuji Omura

Haruka Miyaji

Hiroyuki Kaidu

Hiroyuki Kato

Masaki Kagawa

Toshikazu Koshiba

Mitsuhiko Takahashi

To provide an axial fan motor increasing the mounting area of a circuit board and further improving heat dissipation as compared with the axial fan motor in the related art. A fan device as an axial fan motor includes: a casing having a hollow tubular shape and provided with an intake opening at one end in an axial direction and an exhaust opening at another end in the axial direction; an impeller including a plurality of blades and accommodated in the casing; a motor accommodated in the casing and configured to rotate the impeller; and a plurality of circuit boards arranged along the axial direction at a side close to exhaust opening in the casing.

Axial fan motor

A motor drive control device capable of reducing the occurrence of vibration in a simple circuit configuration is provided. The motor drive control device () includes a motor drive unit () that selectively energizes coils with a plurality of phases (Lu, Lv and Lw) of a motor () and a control circuit () that outputs a drive control signal (Sd) which is a PWM signal to the motor drive unit () and thereby controls driving of the motor () while switching energization phases of the coils with the plurality of phases (Lu, Lv and Lw) energized by the motor drive unit () in predetermined order. The control circuit () executes reduction control to temporarily reduce a duty ratio of the drive control signal (Sd) every time a period of 1/m (m is an integer of 2 or more) of a switching cycle of the energization phases elapses after switching the energization phases.

Motor drive control device and motor drive control method

A fan apparatus comprises a stator unit, a rotor unit comprising an impeller, and a casing that houses the stator unit and the rotor unit. The casing comprise a side wall portion that surrounds a periphery of the impeller, a base portion that holds the stator unit and the rotor unit, and a plurality of connection portions that connect the side wall portion and the base portion. The casing is formed by at least two members including a first member and a second member coupled to the first member. The first member includes at least one of the connection portions and at least part of the base portion, and the second member includes at least one of the connection portions.

Fan apparatus and manufacturing method of the fan apparatus

A motor includes a rotor, a stator, an excitation coil, and a holder disposed on an outer side of the stator to hold a flexible printed circuit board supplying drive power, wherein the holder includes a main body mounting the flexible printed circuit board thereon, a bridging portion disposed along one of long sides on a first face a of the main body to form a first opening allowing the flexible printed circuit board to be inserted therethrough, and an engaging portion disposed along each of short sides on a second face of the main body to removably fit with a part of a terminal block of the excitation coil.

Motor having holder of flexible printed circuit board and actuator using such motor

There is provided an actuator including a motor and a case adapted to house the motor. In the actuator, an output shaft of the motor is supported by a structured configured such that an elastic member is disposed between the case and at least one end of the output shaft, wherein the elastic member is in contact with a portion of the case in an engaging manner whereby the elastic member is prevented from shifting relative to the case in the rotation direction of the output shaft, and also wherein the elastic member is in contact with a portion of the motor in an engaging manner whereby a body of the motor is prevented from shifting relative to the elastic member in the rotation direction of the output shaft.

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Kakegawa, Japan

Tomoyuki Suzuki