Electrolytic capacitor reformation systems and methods

摘要

An electrolytic capacitor reformation system for a vehicle includes an electrolytic capacitor, a motor driver module, a switching device, a resistor, and a switching control module. The electrolytic capacitor receives power from a battery of the vehicle. The motor driver module receives power from the electrolytic capacitor and drives an electric motor of the vehicle. The switching device and the resistor are connected in series in a current path between the battery and the electrolytic capacitor. The resistor limits current flow through the current path. The switching control module selectively transitions the switching device to a closed state to reform the electrolytic capacitor.

主权项

1. An electrolytic capacitor reformation system for a vehicle, comprising:
an electrolytic capacitor that receives power from a battery of the vehicle, wherein defects form in an oxide of the electrolytic capacitor when the electrolytic capacitor has not received power for at least a predetermined period; a motor driver module that receives power from the electrolytic capacitor and that drives an electric motor of the vehicle; a switching device and a resistor that are connected in series in a current path between the battery and the electrolytic capacitor, wherein the resistor limits current flow through the current path; and a switching control module that varies a duty cycle of the switching device as a function of a leakage current through the electrolytic capacitor to cure defects formed in the oxide of the electrolytic capacitor and, wherein the switching control module determines an equivalent series resistance (ESR) of the electrolytic capacitor and initiates curing of the defects formed in the oxide of the electrolytic capacitor in response to a determination that the ESR of the electrolytic capacitor is less than a predetermined resistance.