| 摘要 |
PROBLEM TO BE SOLVED: To provide an absolute angle detection device which can obtain a true position detection signal offsetting an error component. SOLUTION: In the absolute angle detection device, coil parts L<SB>A11</SB>to L<SB>C14</SB>of coils LA1 to LC1 of a first system and coil parts L<SB>A21</SB>to L<SB>C24</SB>of coils LA2 to LC2 of a second system are arranged at a stator so that in the in-phase coils of the respective systems are point symmetrical about a central point of the stator. Outputs of the coil of the respective systems are converted by 3-phase/2-phase conversion, the conversion outputs obtained by the conversion are converted into first and second angle signals, and an average value of an offset angle signal obtained by offsetting only coordinates of any one of the first and second angle signals by 180° and the other angle signal is calculated. Accordingly, a true absolute angle position signal obtained by offsetting the error component is thereby detected. COPYRIGHT: (C)2011,JPO&INPIT |
