Patent ID: 6727622
Filing Date: 2004-04-27
Classification: G01R,H02K

Abstract:
A movable magnetic type instrument comprising a rotor magnet magnetized such that adjacent magnetic poles are poles different from each other; a pair of coils arranged around this rotor magnet and having winding central axes crossing each other at a rotation center of the rotor magnet without being perpendicular to each other; control means for processing an input signal based on a measured amount and supplying a driving signal mutually having a different electrical angle to each of said coils and rotating and operating said rotor magnet; and a pointer rotated by said rotor magnet as a driving source; wherein, when the number of magnetic poles of said rotor magnet is set to n and an acute angle formed by crossing said winding central axes at said rotation center of said rotor magnet is set to r, the acute angle r is set to an angle calculated by 360/2n (n is a multiple of 2 equal to or greater than 4).