US 11,658,596 B2
Motor control device and air conditioner
Takeshi Shibayama, Tokyo (JP); Mariko Kuboi, Tokyo (JP); Toshimitsu Aizawa, Tokyo (JP); Naohito Kamiya, Fuji (JP); and Yoshitaka Uchiyama, Fuji (JP)
Assigned to KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and TOSHIBA CARRIER CORPORATION, Kawasaki (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and TOSHIBA CARRIER CORPORATION, Kawasaki (JP)
Filed on May 18, 2022, as Appl. No. 17/663,876.
Claims priority of application No. JP2021-129010 (JP), filed on Aug. 5, 2021.
Prior Publication US 2023/0045429 A1, Feb. 9, 2023
Int. Cl. H02P 21/18 (2016.01); F24F 11/30 (2018.01); H02P 6/08 (2016.01); H02P 25/022 (2016.01); H02K 11/30 (2016.01)
CPC H02P 21/18 (2016.02) [F24F 11/30 (2018.01); H02K 11/30 (2016.01); H02P 6/08 (2013.01); H02P 25/022 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A motor control device comprising:
a power supply unit that supplies AC power to a motor to drive a load,
a current detection unit that detects a current flowing through a winding of the motor,
a speed and electric angle estimation unit that estimates a rotation speed and an electric angle of the motor based on a voltage outputted by the power supply unit and the current,
a coordinate conversion unit that obtains an excitation current and a torque current based on the current and the electric angle,
a torque current command determination unit that substitutes a predicted torque calculated based on a mechanical motion equation into a torque component current command value calculated based on a torque expression of a vector control coordinate of a permanent magnet synchronous motor, to generate a torque component current command value for bringing a difference between an inputted speed command and an estimated speed closer to zero, and
a model prediction control unit that applies, to a plurality of predicted currents including a current change ratio determined depending on each of a plurality of switching patterns based on a space voltage vector that are able to be outputted by the power supply unit, an evaluation function to evaluate a size of a difference from a predicted current corresponding to each of the torque component current command value and an excitation component current command value inputted from outside, and that selects and outputs a switching pattern.