| 摘要 |
<P>PROBLEM TO BE SOLVED: To increase centrifugal-force-withstanding strength of a rotor in a variable speed synchronous motor, to achieve reduction in space and cost cut of a control circuit, and to obtain an ultra-high speed, small, highly efficient motor-driven blower. <P>SOLUTION: A slip ring and a position-detecting ring are provided on the rotor and lap windings are wound on an iron core having multiple slots to form a rotating body that is well balanced and excellent in withstanding the centrifugal force. Stator windings comprise a main coil and an auxiliary coil connected in parallel, and by controlling the switching of a power switch in synchronization with a voltage signal detected by brushes contacted on a position detecting sensor ring, an AC voltage is supplied to the stator parallel windings. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
