| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electric fluid pump which can appropriately control rotation of a motor part, irrespective of the high or the low level of the temperature of fluid. <P>SOLUTION: The electric fluid pump 1 is provided with a first rotor position detecting means 41 for detecting a rotation position of a rotor 15, based on the speed electromotive force induced by respective exciting coils, a second rotor position detecting means 50 detecting the rotational position of the rotor 15, based on a detection result of a magnetic field from a magnet 21 installed in a rotation axis 14, and an operation state detecting means 44. A rotation control means 43 is constituted, in such a way that it can be switched to a rotational control, based on the rotation position of the rotor 15 which is detected by the first rotor position detecting means 41, and a rotation control based on the rotation position of the rotor 15, which is detected by the second rotor position detecting means 50, based on a detection result by the operation state detecting means 44. <P>COPYRIGHT: (C)2008,JPO&INPIT |
