Impedance estimation of power sources via motor inverter circuits
US11757391B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2022 |
| Grant date | Sep 12, 2023 |
| Priority date | — |
| Expiry date | Feb 21, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60L2240/529
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.