| 摘要 |
PURPOSE:To operate a commutatorless motor with less timing displacement for switching a current even if its rotating speed is varied by switching the constant of a primary filter in response to a rotor speed. CONSTITUTION:Switching means 18-20 switch the constants of primary filters 21-23 in response to the rotating speed of a rotor detected by rotating speed detecting means 14. Switching means 15-17 switch the constants of the primary filters 21-23 in response to an applied voltage. Comparators 24-26 compare the output voltages after they pass the filters 21-23 of stator winding terminal voltages V1-V3, and output position detection information of a rotor 13. Control means 27 discriminates the position of the rotor 13 on the basis of the output states of the comparators 24-26, and output gate signals to the switching elements to be conducted of switching elements 1-6. |
