Impedance estimation of power sources via motor inverter circuits

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United States of America Patent

PATENT NO 11757391
SERIAL NO

17676535

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A motor drive system of a vehicle includes: an inverter that receives power from a power source via a bus, where the inverter is connected to a motor of the vehicle; a driver that drives the inverter; a filter that filters a current signal received from the bus to generate a filtered signal; and a control module that operates in an impedance determination mode. The impedance determination mode includes: based on the filtered signal, controlling the driver and the inverter to generate a pulsed signal applied to the power source; determining a current level and a voltage of the power source due to generation of the pulsed signal, and determining impedance based on the current level and the voltage. The control modules are configured to: determine a characterization parameter of the power source based on the impedance; and perform a control operation or a countermeasure based on the characterization parameter.

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Patent Owner(s)

Patent OwnerAddress
GM GLOBAL TECHNOLOGY OPERATIONS LLCPO BOX 300 MAIL CODE 482-C22-A68 DETROIT MI 48265-3000

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hao, Lei Troy, US 170 934
Muldoon, Steven E Royal Oak, US 16 110
Wang, Yue-Yun Troy, US 146 1652

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