| 摘要 |
PROBLEM TO BE SOLVED: To achieve a highly efficient weak field control, by allowing a current command creation means to create a current command based on the degree of saturation, and allowing a saturation creation means to prepare the degree of saturation based on the current command, a stator current, and a pole position signal. SOLUTION: Stator coil windings 1U, 1V, and 1W are connected to a drive means 10 and supply power to a stator coil winding based on a stator current command and a stator current. A current command creation means 30 for creating a current command creates a d-axis current command and a q-axis current command based on an acceleration value Acc and a degree of saturation Sat and outputs them to a 2/3 phase conversion means 6 and a degree-of- saturation, preparation means 20. The degree-of-saturation creation means 20 has a means for preparing a current error amplitude and an integration means inside, creates the degree of saturation Sat for indicating how much the stator current does not follow the current command based on the input of, for example, an extreme position signal for indicating the current command, stator current, and extreme position, and outputs it to a current command preparation means 20, thus achieving efficient and weak filed control. |
