| 摘要 |
PCT No. PCT/GB93/02510 Sec. 371 Date Jun. 5, 1995 Sec. 102(e) Date Jun. 5, 1995 PCT Filed Dec. 8, 1993 PCT Pub. No. WO94/14027 PCT Pub. Date Jun. 23, 1994A rotary variable differential transducer has first and second coil portions (50a and 50b) of a primary coil overwound by respective secondary coils (52 and 54). Pole pieces (42 and 44) are asymmetrically arranged about the axis of rotor (16) and are inductively associated with the first and second coil portions (50a and 50b), respectively. The rotor (16) has first and second formations which are respectively defined by front and rear arcuate portions (70b and 70c) associated with the pole pieces (42 and 44), respectively. The pole pieces (42 and 44) are mutually angularly displaced about the axis of the rotor (16). The first and second coil portions (50a and 50b) are mutually axially displaced relative to the rotor (16) and an intermediate common pole piece (32b) is disposed between them. An intermediate formation defined by an annular peripheral portion (70a) on the rotor (16) lies adjacent the common pole piece (32b), an output which is indicative of the angular position of the rotor (16) is taken from the second coils (52 and 54).
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