| 摘要 |
PURPOSE:To obtain a high output and high efficiency by arithmetically operating the displacement of an electrical central axis changing in response to load and controlling phase in response to the electrical central axis. CONSTITUTION:The position of the revolution of a rotor 2 is detected by a sensor 3, and an output from the sensor 3 is transmitted over a revolution- number detecting circuit 5 through a revolution-position detecting circuit 4. The number of revolution acquired by the circuit 5 is transmitted over an arithmetic processing section 8, and an electrical central axis moving in the direction opposite to the direction of rotation of the rotor 2 only by a fixed angle from a geometrical central axis is obtained. Currents made to flow through each winding 1 at phase corresponding to the electrical central axis are changed over by a changeover control circuit 6, a signal is transmitted over a driving circuit 7, and a transistor for switching for a winding current changeover circuit 9 is turned ON-OFF. |
