| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control device for an electric supercharger accurately estimating the rotation speed and magnetic pole positions of an electric motor for an electric supercharger. <P>SOLUTION: This control device includes an induced voltage detection part 6 detecting induced voltage from terminal voltage of a synchronous motor 1, a magnetic field current control part 9 controlling magnetic field current to be supplied to a magnetic field coil so as to make detection value of induced voltage coincide with desired command value, a rotation speed estimation part 13 estimating rotation speed of the synchronous motor 1 based on the detection value or the command value of induced voltage, the detection value of the magnetic field current, and a command value or voltage value corresponding to the magnetic field current, and a magnetic pole position detection means detecting the magnetic pole positions of the synchronous motor 1 based on the terminal voltage of the synchronous motor 1. <P>COPYRIGHT: (C)2011,JPO&INPIT |
