US 12,267,033 B2
Motor drive system
Satoshi Yoshizawa, Tokyo (JP); and Tomoyuki Okada, Tokyo (JP)
Assigned to Subaru Corporation, Tokyo (JP)
Filed by SUBARU CORPORATION, Tokyo (JP)
Filed on Dec. 27, 2022, as Appl. No. 18/088,932.
Claims priority of application No. 2022-002868 (JP), filed on Jan. 12, 2022.
Prior Publication US 2023/0223884 A1, Jul. 13, 2023
Int. Cl. H02P 27/08 (2006.01); B60L 7/10 (2006.01); B60L 50/60 (2019.01); B60L 53/24 (2019.01); H02K 16/04 (2006.01); H02P 3/14 (2006.01)
CPC H02P 27/08 (2013.01) [B60L 7/10 (2013.01); B60L 50/60 (2019.02); B60L 53/24 (2019.02); H02K 16/04 (2013.01); H02P 3/14 (2013.01); B60L 2210/30 (2013.01); B60L 2210/42 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A motor drive system comprising:
a battery;
double-stator axial gap motors;
inverter circuits configured to control power running drive and regenerative drive of the double-stator axial gap motors;
step-up/step-down circuits configured to adjust at least voltage of regeneratively generated power of the double-stator axial gap motors; and
one or more control devices configured to control drive of the inverter circuits and the step-up/step-down circuits,
wherein each of the double-stator axial gap motors comprises two stators,
wherein each of the inverter circuits are connected to a respective one of the two stators,
wherein the inverter circuits are connected in series,
wherein a single step-up/step-down circuit among the step-up/step-down circuits is provided for each of the axial gap motors,
wherein the single step-up/step-down circuit provided for each of the axial gap motors is connected to one of two inverter circuits connected to the two stators among the inverter circuits, and
wherein the one or more control devices are configured to, during the regenerative drive of the double-stator axial gap motors, adjust an output voltage from the one of the two inverter circuits by controlling the drive of the step-up/step-down circuits to make regenerative power currents of the two inverter circuits of each of the double-stator axial gap motors equal to each other, and supply a current from the one of the two inverter circuits to another of the two inverter circuits.