US 12,278,582 B2
Controller for rotary machine
Tatsuya Mori, Tokyo (JP); and Akira Furukawa, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Appl. No. 18/270,054
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Mar. 1, 2021, PCT No. PCT/JP2021/007718
§ 371(c)(1), (2) Date Jun. 28, 2023,
PCT Pub. No. WO2022/185381, PCT Pub. Date Sep. 9, 2022.
Prior Publication US 2024/0063746 A1, Feb. 22, 2024
Int. Cl. H02P 27/12 (2006.01); B62D 5/04 (2006.01)
CPC H02P 27/12 (2013.01) [B62D 5/046 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A controller for rotary machine which controls a rotary machine which has two sets of plural-phase armature windings, via two sets of inverters connected to the same DC power source, the controller for rotary machine comprising at least one processor configured to implement:
a distributer that calculates an utilization factor setting command related to setting of a first set of voltage utilization factor which is a ratio of an amplitude of a fundamental wave component of line voltages of applied voltages of first set of plural-phase armature windings with respect to a power source voltage of the DC power source, and a second set of voltage utilization factor which is a ratio of an amplitude of a fundamental wave component of line voltages of applied voltages of second set of plural-phase armature windings with respect to the power source voltage;
a first set voltage command calculator that calculates first set of plural-phase voltage command values, based on the utilization factor setting command;
a second set voltage command calculator that calculates second set of plural-phase voltage command values, based on the utilization factor setting command; and
a first set switching controller that turns on and off a plurality of switching devices provided in the first set of inverter, based on the first set of plural-phase voltage command values, and applies voltages to the first set of plural-phase armature windings;
a second set switching controller that turns on and off a plurality of switching devices provided in the second set of inverter, based on the second set of plural-phase voltage command values, and applies voltages to the second set of plural-phase armature windings,
wherein the distributer calculates the utilization factor setting command which makes an utilization factor ratio between the first set of voltage utilization factor and the second set of voltage utilization factor change from 1 to 1 so that an effective value of a bus line AC component which is an AC component superimposed on a bus current which flows through a bus line connecting between the DC power source and the two set of inverters becomes lower than a case where the utilization factor ratio is 1 to 1.