CPC H02P 23/14 (2013.01) [B60L 15/20 (2013.01); G01R 27/02 (2013.01); G01R 31/389 (2019.01); H02P 27/08 (2013.01); H02P 29/68 (2016.02)] | 20 Claims |
1. A motor drive system of a vehicle, the motor drive system comprising:
an inverter configured to receive power from a power source via a bus, wherein the inverter is connected to a motor of the vehicle, the power source being separate from the motor and comprising at least one of a battery pack, a battery module, and a cell of a battery module;
a driver configured to drive the inverter;
a filter configured to filter a current signal received from the bus to generate a filtered signal; and
one or more control modules configured to
operate in an impedance determination mode including
based on the filtered signal, control the driver and the inverter to generate a pulsed signal applied to the power source,
determine a current level and a voltage of the power source due to generation of the pulsed signal, and
determine impedance based on the current level and the voltage,
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.
|