Omron Automotive Electronics Co., Ltd.

Tetsuya Fukumoto

Takenobu Nakamura

Toshio Saito

Michisada Yabuguchi

Takeshi Yasuda

Kazushi Kadogaki

A motor control device has a motor driving unit that drives a motor, a current detecting unit that detects a motor current flowing through the motor, a control unit that compares a detected current value of the motor current detected by the current detecting unit with a target current value to obtain a deviation, to control the motor driving unit based on the deviation, and a compensation unit that sets as a current offset value a detected current value of a drift current detected by the current detecting unit in a state where the motor current is regarded as zero, to compensate the detected current value of the motor current by the current offset value. The compensation unit sets a target offset value according to the current value of the detected drift current to correct the current offset value stepwise until the current offset value reaches the target offset value.

Motor control device

In order to prevent rattling and avoid generation of chips at the time of assembly in a storage case for a power steering control unit of a vehicle, a storage case includes a base having a plate-shaped substrate member, and a box-shaped cover having an opening on the lower side and being mounted on the base so as to cover the upper surface of the substrate member, wherein rattling preventing projections are provided at a plurality of positions on the peripheral edge of the substrate member so as to come into abutment with an opening-side edge of the cover, which is positioned at a mounting position with respect to the base, from the outside; on the inner side of the rattling-preventing projections bevels are formed, which presses the opening-side edge to resiliently deform the peripheral wall of the cover inward and causes a reaction force to act in a direction in which the cover moves away from the substrate member and comes apart from the base; and the opening-side edge is formed with a crimping projection formed by being bent toward the lower surface of the substrate member so as to retain the cover at the mounting position against the reaction force.

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Nagoya, Japan

Tetsuya Fukumoto