US 12,191,789 B2
Drive system
Kazuo Nishihama, Tokyo (JP); Masatoshi Yoshimura, Tokyo (JP); Kosuke Matsuo, Tokyo (JP); Satoru Kaneko, Tokyo (JP); Tokuma Ikegami, Tsuchiura (JP); Seiji Ishida, Tsuchiura (JP); and Toshihiko Watanabe, Tsuchiura (JP)
Assigned to Hitachi Construction Machinery Co., Ltd., Tokyo (JP)
Appl. No. 18/025,492
Filed by Hitachi Construction Machinery Co., Ltd., Tokyo (JP)
PCT Filed Feb. 18, 2022, PCT No. PCT/JP2022/006753
§ 371(c)(1), (2) Date Mar. 9, 2023,
PCT Pub. No. WO2022/209413, PCT Pub. Date Oct. 6, 2022.
Claims priority of application No. 2021-054594 (JP), filed on Mar. 29, 2021.
Prior Publication US 2023/0370008 A1, Nov. 16, 2023
Int. Cl. H02P 27/06 (2006.01); B60L 7/14 (2006.01); B60L 15/00 (2006.01); B60L 50/51 (2019.01); H02K 11/33 (2016.01)
CPC H02P 27/06 (2013.01) [B60L 7/14 (2013.01); B60L 15/007 (2013.01); B60L 50/51 (2019.02); H02K 11/33 (2016.01)] 7 Claims
OG exemplary drawing
 
1. A drive system comprising:
an induction generator having some primary windings that has a main winding and an auxiliary winding;
a traction inverter for supplying electric power to a traction motor;
an auxiliary inverter for supplying electric power to an auxiliary motor;
a rectifier having a terminal for alternating current connected to the main winding and a terminal for direct current connected to the traction inverter; and
a converter for power generating having a terminal for alternating current connected to the auxiliary winding and a terminal for direct current connected to the auxiliary inverter,
wherein a maximum current value of the converter for power generating is set on a basis of a maximum output power of the auxiliary winding and a minimum voltage applied to the auxiliary winding unless the traction inverter is in a regenerative mode of operation, and
a non-load current value of the induction generator is set such that a maximum current in the auxiliary winding under the condition of the traction inverter being in the regenerative mode of operation does not exceed a maximum current in the converter for power generating.