| 摘要 |
A driving control portion 6 in an inverter control device structured by a capacitor 32 having a smaller capacitance includes a magnetic-flux estimation portion 17 for estimating a flux linkage in a motor 5 based on an electric current in the motor 5 having a higher ratio of a reluctance torque detected by an electric current detection portion 7, an electric-current phase-difference adjustment portion 14 for adjusting a phase difference between the electric current and an induced voltage generated by the motor 5, and an electric power calculation portion 20 for calculating input electric power to the motor 5, from an output voltage from a DC/AC conversion portion 4, and from the electric current from the electric-current detection portion 7, wherein the electric-current phase-difference adjustment portion 14 performs a phase adjustment, such that an estimated flux-linkage value estimated by the magnetic-flux estimation portion 17 is equal to or less than a predetermined set value and, an average value of the input electric power obtained by the electric power calculation portion 20 has a minimum value, thereby optimizing the efficiency of a motor driving system. |
