US 12,319,155 B2
Drive system for dump truck
Satoru Kaneko, Tokyo (JP); Kazuo Nishihama, Tokyo (JP); Masatoshi Yoshimura, Tokyo (JP); Kosuke Matsuo, Tokyo (JP); Seiji Ishida, Tsuchiura (JP); Toshihiko Watanabe, Tsuchiura (JP); and Tokuma Ikegami, Tsuchiura (JP)
Assigned to Hitachi Construction Machinery Co., Ltd., Tokyo (JP)
Appl. No. 18/025,002
Filed by Hitachi Construction Machinery Co., Ltd., Tokyo (JP)
PCT Filed Feb. 8, 2022, PCT No. PCT/JP2022/004956
§ 371(c)(1), (2) Date Mar. 7, 2023,
PCT Pub. No. WO2022/201927, PCT Pub. Date Sep. 29, 2022.
Claims priority of application No. 2021-053049 (JP), filed on Mar. 26, 2021.
Prior Publication US 2023/0373320 A1, Nov. 23, 2023
Int. Cl. B60L 50/13 (2019.01); B60L 1/00 (2006.01)
CPC B60L 50/13 (2019.02) [B60L 1/003 (2013.01); B60L 2200/44 (2013.01); B60L 2210/10 (2013.01); B60L 2210/30 (2013.01); B60L 2210/40 (2013.01); B60L 2240/12 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A drive system for a dump truck, the drive system comprising:
a two-winding induction generator having a primary winding including a main winding and an auxiliary winding;
a rectifier that rectifies alternating-current power generated in the main winding into direct-current power;
an auxiliary converter that converts alternating-current power generated in the auxiliary winding into direct-current power;
a traction inverter that is connected to the rectifier through a main side DC bus, converts the direct-current power supplied from the rectifier into alternating-current power, and supplies the alternating-current power to a traction motor of the dump truck;
an auxiliary machine inverter that is connected to the auxiliary converter through an auxiliary side DC bus, converts the direct-current power supplied from the auxiliary converter into alternating-current power, and supplies the alternating-current power to an auxiliary machine motor of the dump truck; and
a controller that controls the auxiliary converter, wherein
the drive system includes a DC-DC converter connected to the main side DC bus and the auxiliary side DC bus, and
the controller is configured to control the DC-DC converter such that electric power of the main side DC bus is supplied to the auxiliary side DC bus via the DC-DC converter.