The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 03, 2026
Filed:
Oct. 02, 2023
GM Global Technology Operations Llc, Detroit, MI (US);
Khorshed Mohammed Alam, Canton, MI (US);
Yilun Luo, Ann Arbor, MI (US);
Junghoon Kim, Springboro, OH (US);
Chandra S. Namuduri, Troy, MI (US);
Muhammad A. Zahid, Troy, MI (US);
Mazharul Chowdhury, Canton, MI (US);
Lei Hao, Troy, MI (US);
Seyedrasoul Hosseini, Troy, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
Presented are separately excited motor (SEM) drive systems, methods for making/using such systems, and vehicles equipped with such systems. A motor drive system includes a rechargeable battery unit and a multilevel power factor correction (PFC) device interposed between and electrically connecting the battery unit and an electric power source. The battery unit and PFC device are electrically connected via a traction inverter module (TIM) device and a multilevel power transfer circuit (PTC) device. The TIM contains multiple pairs of TIM switches, and the PTC device contains multiple PTC switches. An SEM unit contains a rotor assembly, which includes a rotor core bearing a rotor winding, and a stator assembly, which includes a stator core bearing multiple stator windings electromagnetically paired with the rotor winding. Each stator winding is electrically connected to a respective pair of TIM switches, whereas the rotor winding is electrically connected to the PTC switches.