Inductive rotation angle sensor and motor-driven airflow control device using the same

一种旋转检测、控制装置的技术，应用在发动机控制、测量装置、采用电/磁装置传递传感构件等方向，能够解决装置变大、氧化、电磁感应作用变弱等问题
CN101162155AActive Publication Date: 2008-04-16HITACHI ASTEMO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HITACHI ASTEMO LTD
Publication Date
2008-04-16

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Abstract

A motor-driven airflow control device is provided wherein an inductance-based non-contact rotation angle sensor is compactly formed at an end of a throttle shaft. An exciting conductor is attached at an end of a rotating shaft to which a throttle valve is attached, a window hole is provided on a gear cover, a stationary substrate with energizing and signal-generating conductors formed thereon is attached to the gear cover so as to face the exciting conductor on the rotating shaft side through the window hole, and the window hole of the gear cover is covered by a thin shield member. The energizing and signal-generating conductors can be shielded from a space where the exciting conductor of the rotary member is arranged, making it possible to obtain a highly reliable motor-driven airflow control device including an inductance-based non-contact rotation angle sensor which is not affected by environments on the rotary member side.
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Description

technical field

[0001] The present invention relates to a rotation angle detecting device, which detects that the inductance between the conductor installed on the rotating shaft of the rotating body and the coil conductor installed on the facing stator corresponds to the positional relationship between the two. The rotated position of the rotated conductor.

[0002] It also relates to a motor-driven throttle control device that electrically controls the opening area of ​​an air passage of an internal combustion engine using a throttle valve driven by a motor, and includes the above-mentioned rotation angle detection device for detecting the rotation angle of the throttle valve. Background technique

[0003] As a so-called non-contact rotation angle detection device that detects the position or rotation angle of a rotating body by a change in inductance, a device described in Japanese Patent Application Laid-Open No. 2003-254782 is known.

[0004] This rotation angle detect...

Claims

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