JPS6354019U

JPS6354019U -

Info

Publication number: JPS6354019U
Application number: JP13295286U
Authority: JP
Priority date: 1986-08-28
Filing date: 1986-08-28
Publication date: 1988-04-11

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例による回転速度検
出装置のモータ部の側面断面図、第２図は第１図
のモータ部のマグネツトとホール素子との位置関
係を示す図、第３図はこの考案の動作説明用の信
号波形図、第４図はこの考案の他の実施例を示す
要部の回路構成図、第５図は従来の回転速度検出
装置のモータ部を示す側面断面図、第６図は回転
円板の正面図、第７図は３相８極着磁のマグネツ
トの説明図、第８図は固定子（ステータ）を示す
平面図、第９図は第５図のものの送受光素子から
の出力波形図、第１０図は回転速度検出装置の使
用例を示すブロツク図である。１…被駆動体、２…回転子、３…マグネツト、
６…固定子、７…コイル、８…ヨーク、１３…Ｓ
極着磁部、１４…Ｎ極着磁部、１５０ａ，１５０
ｂ，１５０ｃ…ホール素子。なお、図中同一符号
は同一もしくは相当部分を示す。 FIG. 1 is a side sectional view of the motor section of a rotational speed detection device according to an embodiment of the invention, FIG. 2 is a diagram showing the positional relationship between the magnet and the Hall element in the motor section of FIG. 1, and FIG. A signal waveform diagram for explaining the operation of this invention, FIG. 4 is a circuit configuration diagram of the main part showing another embodiment of this invention, and FIG. 5 is a side sectional view showing the motor part of a conventional rotational speed detection device. Figure 6 is a front view of the rotating disk, Figure 7 is an explanatory diagram of a 3-phase 8-pole magnetized magnet, Figure 8 is a plan view of the stator, and Figure 9 is the same as that shown in Figure 5. FIG. 10 is a block diagram showing an example of the use of the rotational speed detection device. 1... Driven body, 2... Rotor, 3... Magnet,
6...Stator, 7...Coil, 8...Yoke, 13...S
Pole magnetized part, 14...N pole magnetized part, 150a, 150
b, 150c...Hall element. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims

[Claims for Utility Model Registration] (1) A magnet having a magnetized region of multiple poles equally divided in the circumferential direction, and a magnet holder in which the magnet constitutes a rotor and is attached to a driven body; A plurality of coils facing the magnet and equally distributed in the circumferential direction, a yoke holding the coils and forming a stator together with the coils, and a motor drive provided on the stator side. A rotational speed detection device for detecting the rotational speed of the driven body using a magnetoelectric conversion element brushless motor comprising a magnetoelectric conversion element, characterized in that the magnetoelectric conversion element also serves as the rotational speed detection element. Rotation speed detection device. (2) The rotational speed detection device according to claim 1, wherein the magnetoelectric conversion element is a Hall element.