JPH0348376U

JPH0348376U -

Info

Publication number: JPH0348376U
Application number: JP10721489U
Authority: JP
Priority date: 1989-09-14
Filing date: 1989-09-14
Publication date: 1991-05-09

Description

[Brief explanation of the drawing]

第１図から第４図迄は、本考案によるブラシレ
スＤＣモータを示すためのもので、第１図は全体
構成を示す断面図、第２図は第１図の要部を示す
斜視図、第３図はブロツク図、第４図は各相の正
弦波出力信号を示す波形図、第５図は従来の正弦
波極センサを用いたブラシレスＤＣモータを示す
断面図である。１……ケーシング、２……固定子巻線、４，５
……軸受、６……回転子、７……回転軸、２０，
２１，２２……正弦波極センサ、２３……基板、
２５……マグネツト回転板、２６ａ，２７ａ，２
８ａ……正弦波出力信号である。 1 to 4 are for showing the brushless DC motor according to the present invention. FIG. 1 is a sectional view showing the overall configuration, FIG. 2 is a perspective view showing the main parts of FIG. 1, and FIG. 3 is a block diagram, FIG. 4 is a waveform diagram showing sine wave output signals of each phase, and FIG. 5 is a sectional view showing a brushless DC motor using a conventional sine wave pole sensor. 1...Casing, 2...Stator winding, 4, 5
... Bearing, 6 ... Rotor, 7 ... Rotating shaft, 20,
21, 22... Sine wave pole sensor, 23... Board,
25...Magnetic rotating plate, 26a, 27a, 2
8a...Sine wave output signal.

Claims

[Claims for Utility Model Registration] Multi-phase U, V, W stator windings 2 provided in a casing 1, and a rotor rotatably provided via bearings 4, 5 provided in the casing 1. 6
, and each sine wave output signal 26a, 27a, 28a obtained from each sine wave pole sensor 20, 21, 22 by rotation of the rotation axis 7
In the brushless DC motor which performs phase switching and is rotationally driven using the following: a substrate 23 held in the casing 1 to hold each of the sine wave pole sensors 20, 21, 22;
and a magnet rotary plate 25 having at least two poles of sinusoidal magnetized portions in the radial direction provided on the rotary shaft 7, and each of the sinusoidal pole sensors 20, 2
A brushless DC motor, characterized in that the sinusoidal magnetic flux density from the sinusoidal magnetized portion is detected by 1 and 22.