Method and system for determining an operating characteristic associated with an inductor in a power converter system

摘要

A method and system is provided for determining at least one operating characteristic associated with an inductor in a power converter system. The operating characteristic may be current through the inductor. The power converter system may be of the type used in a hybrid electric vehicle (HEV) to convert electric power from a high-voltage traction battery to drive an electric motor and/or a generator in the HEV.

主权项

1. A method of determining current through an inductor (IL) in a power converter system inside a hybrid electric vehicle with an electric motor and a generator, the power converter system being connected between a traction battery and a direct current (DC) bus for driving the electric motor and the generator with electric power from the traction battery, the method comprising:
determining battery output current (ibatt); determining a voltage across the inductor (vL); and determining the current through the inductor (iL) based on the battery output current (ibatt), and the voltage across the inductor (vL), and an open loop observer emulating parameters of physical behavior of the inductor including parasitic resistance of the inductor (r^L) and inductance of the inductor (L^).