Title:
MULTIPOLARLY MAGNETIZED MAGNET FOR FREQUENCY GENERATOR
Document Type and Number:
Japanese Patent JPS59144349
Kind Code:
A
Abstract:
PURPOSE:To obtain an output having preferable signal to noise ratio by varying the thickness of a magnet in smooth valley shape, thereby increasing the peak value of the generating voltage waveform. CONSTITUTION:Voltage and frequency which are proportional to the rotating speed are generated from the output terminal of a conductive pattern printed on a substrate in a frequency generator used for detecting the speed of a rotary machine. The surface shape of the pole of a multipolarly magnetized magnet of this generator is formed in smooth valley shape, thereby forming the distribution shape of the magnetic flux density of each pole in a trapezoidal shape as shown.
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Inventors:
IKEGAMI AKIHIKO
Application Number:
JP1486183A
Publication Date:
August 18, 1984
Filing Date:
February 01, 1983
Export Citation:
Assignee:
SUWA SEIKOSHA KK
International Classes:
H01F7/02; G01P3/487; H02K1/27; (IPC1-7): G01P3/487; H01F7/02
Attorney, Agent or Firm:
Kisaburo Suzuki (1 outside)