JPS61193319U - - Google Patents

Description

[Brief explanation of drawings]

Figure 1 is a plan view of one embodiment of the device of the present invention;
The figure is a block system diagram, FIG. 3 is a signal waveform diagram, FIGS. 4 and 5 are schematic diagrams of the device previously proposed by the applicant, and FIGS. 6 and 7 are other diagrams of the device of the present invention. FIG. 3 is a schematic diagram of each embodiment. 103...Rotor magnet, 104...Coil pattern, 105a...Narrow toothed coil, 106a,
106b... Narrow magnetic pole, 107, 109... Pulse generation circuit, 108, 110... Output terminal.

Claims (1)

[Scope of utility model registration request] A plurality of magnetic poles are arranged in parallel over the entire circumference, and the shape of the magnetic pole of the part corresponding to the position of the rotating body whose position needs to be detected (pisochi) is determined by the shape of the magnetic pole of the other part (pitch) of the plurality of magnetic poles. A plurality of tooth-shaped coils are provided on the circumference facing the magnetic poles of the rotor magnet, and the rotor magnet is provided at a position where the position detection is required. The position of the rotating body is detected by comparing a coil pattern in which the shape (pitch) of the tooth profile at a position facing the magnetic pole is different from the shape (pitch) of the tooth profile in other parts, and the output level of the coil pattern with a threshold value. The switching timing of the magnetic pole of the rotor magnet and the switching timing of the tooth-shaped coil of the coil pattern at the boundary between the part corresponding to the position of the rotating body that requires the position detection and the other part, which is comprised of a detection means. A position detecting device for a rotating body, wherein the switching timing of the magnetic poles of the other parts and the switching timing of the toothed coil are configured to be the same.