Patent ID: 11929694
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A rotary machine control apparatus comprising:
a current detector to detect an alternating current flowing through a rotary machine and output a current detection value;
a power converter to supply power to the rotary machine by applying an AC voltage based on a voltage command value;
a current controller to adjust the voltage command value so that the current detection value matches a current command value;
an estimator to obtain a magnetic-flux estimation value that is an estimation value of an amplitude of a magnetic flux vector in the rotary machine; and
a magnetic flux controller to adjust the current command value so that the magnetic-flux estimation value matches a set magnetic-flux command value, in a start-up control period from when the rotary machine is put in a state where the rotary machine rotates by inertia after interruption of power supply from the power converter to the rotary machine until the rotary machine returns to a normal driven state based on vector control,
wherein the start-up control period includes a magnetic-flux control period and a current control period prior to the magnetic-flux control period, the current control period being a period in which current control is performed based on a default command value that is a preset current command value, the magnetic-flux control period being a period in which current control is performed based on the current command value outputted by the magnetic flux controller.