| 摘要 |
PURPOSE:To enable electrical conduction to be switched with specified rotational frequency and at an optimum position, by setting the phase lag of filter circuits to come to a specified value with the specified rotational frequency, and by controlling the electrical conduction to windings according to the state of the output. CONSTITUTION:Voltage induced to stator windings 7-12 is detected by a posi tion detecting means, and according to the output, by a control means 26, current is conducted to the specified phase of three-phase stator windings 7-12. The position detecting means is connected to respective phase terminals which are not the neutral points of the stator windings 7-12, and is composed of filter circuits 14-16 generating a specified phase lag with specified rotational frequency, and comparators 23-25 comparing each output of the filter circuits 14-16 with each other and detecting the position of a rotor. |
