| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a rotation position detecting device capable of highly precisely detecting the rotational position of a motor at low cost, using a comparably simple configuration. <P>SOLUTION: The rotational position detecting device 1 comprises a section determining part 5 for determining the angle sections belonging to a motor angleθ<SB>E</SB>as well as dividing all the angle range of the electrical angleθ<SB>E</SB>probable extent of all angle range into 8 angle sections of 45°, by using sine wave signals sinθ<SB>E</SB>and cosine wave signals cosθ<SB>E</SB>, varying according to the electrical angleθ<SB>E</SB>; a variable operation part 6 for calculating the variable R in the range of 0≤R<1 by using the sine wave signals sinθ<SB>E</SB>and cosine wave signals cosθ<SB>E</SB>; a compression angle signal generating part 7 for obtaining the compression angle signalθ<SB>C</SB>in the range of 0≤θ<SB>C</SB><45°, corresponding to the variable R using the relation "θ<SB>T</SB>=tan<SP>-1</SP>R" in the angle section "1"; and an angle restoring part 9 for generating detection angle signalθ<SB>D</SB>in the range of 0≤θ<SB>D</SB><360°, by restoring the compression signalθ<SB>C</SB>using a calculation formula predetermined for each angle section. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
