| 摘要 |
<p>Disclosed is a rotational angle sensor capable of preventing reduction of yields, abolishing the use of expensive and complicated coilers, and reducing the tact time by individually forming yokes, and capable of suppressing output errors that occur while the sensor is driven by forming closed magnetic circuits. Specifically disclosed is a rotational angle sensor (1) which comprises a rotor (10), formed of a magnetic body around which no windings are wound, having N salient poles or a sinusoidal gap permeance of N cycles; and a plurality of magnetic pole units (20), each including a yoke (21) and an exciting coil (23) and either a first output coil (24a) or a second output coil (24b) wound around the yoke (21), disposed around the rotor (10). The magnetic units (20) form independent closed magnetic circuits.</p> |
