Invention Grant
- Patent Title: Electric drive system with reconfigurable machine windings
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Application No.: US16570166Application Date: 2019-09-13
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Publication No.: US10998840B2Publication Date: 2021-05-04
- Inventor: Lei Hao , Chandra S. Namuduri , Rashmi Prasad
- Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Applicant Address: US MI Detroit
- Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Current Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Current Assignee Address: US MI Detroit
- Agency: Quinn IP Law
- Main IPC: H02P25/18
- IPC: H02P25/18 ; H02P27/08 ; B60L50/51 ; B60L50/60

Abstract:
An electric drive system includes a battery pack, a power inverter module (“PIM”), an electric machine, a switching circuit, and a controller. The electric machine has three or more phase legs. The PIM has a DC-side connected to the battery pack, and an alternating current (“AC”)-side connected to the electric machine. The switching circuit includes AC switches, and for each phase leg also includes three or more winding sections each electrically connectable to or disconnectable from the battery pack and PIM via the AC switches. The controller commands a binary switching state of each respective AC switch based on the rotary speed to implement one of three different speed-based operating modes of the electric machine, and to thereby vary a conductive path from the PIM to the electric machine through one or more of the connected winding sections.
Public/Granted literature
- US20210083612A1 ELECTRIC DRIVE SYSTEM WITH RECONFIGURABLE MACHINE WINDINGS Public/Granted day:2021-03-18
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