Mitsuba Corporation

Iwao Tsurubuchi

Fumiaki Koshio

Takahiko Ogane

Masamichi Ishii

Wataru Mochizuki

Yoshihisa Yamada

Tomoyuki Ogawa

Wataru Kusumoto

Tomohiro Usami

Atsushi Maeda

Satoshi Kogure

Yoshinari Tabuki

A controller () includes a primary molded portion () in which a resin molded body () is integrated with a bus bar () using a resin, causing one end of the bus bar () to function as a connector terminal which protrudes into connector portions () to (), and configured to form electronic component disposition portions (a) to (d) in which an electronic component () is disposed and a power device disposition portion () in which a power device () is disposed, and a secondary molded portion () integrated with the electronic component (), the power device (), and the primary molded portion () in a state in which the electronic component () is disposed at the electronic component disposition portions (a) to (d) and the power device () is disposed at the power device disposition portion ().

Controller and manufacturing method thereof

The invention provides an electric motor in which a cost is reduced by reducing a number of the parts, and an electric motor in which a freedom of placement is increased. A motor assembly has a yoke and a front bracket closing an open end of the yoke. The front bracket is formed in a closed-end cylindrical shape by an aluminum die casting, and a brush holder for holding a brush is received in an inner portion. A motor controller for controlling the motor assembly is formed as an electronic circuit having a communication portion, a control portion and a driver portion, and this electronic circuit is mounted on an inner peripheral surface of the front bracket. Further, the electronic circuit constituting the motor controller may be mounted on the brush holder.

Electric motor

In a control circuit for a vehicle windshield wiper system, a relay energization retaining circuit forms a self-sustaining circuit jointly with a relay drive transistor for driving a wiper relay, and maintains supply of electric current to the wiper motor when the ON signal for the relay drive transistor is terminated as long as the auto stop switch is at the brake position until the auto stop switch subsequently moves on to the drive position. Therefore, when the signal which normally turns on the relay drive transistor is terminated during the time the auto stop switch is at the brake position, because the relay energization retaining circuit keeps the wiper motor running until the auto stop switch changes over from the brake position to the drive position, and the auto stop switch then takes over the task of keeping the wiper motor running until the auto stop switch changes over from the drive position to the brake position, the termination of electric current to the wiper motor always occurs at the time when the auto stop switch changes over from the drive position to the brake position so that the distance or the angular range of the overrunning of the wiper motor is fixed without regard to the timing of terminating the ON signal. Thus, according to the present invention, the rest position of the wiper blade is fixed under all operating conditions.

Control circuit for a windshield wiper system

Growing community of inventors

Kiryu, Japan

Iwao Tsurubuchi