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US 2024/0405644 A1Published application
Inverter bus with integrated bleed resistor
AssigneeFord Global Technologies, LLC
InventorsJi Wu, Baoming Ge
Life of this patent
Estimating the term…
Abstract
An electric drive system includes a power electronics module with a prefabricated DC bus bar assembly. The prefabricated DC bus bar assembly includes a molded bleed resistor which serves two different functions. First, it dissipates energy from a capacitor when the battery is disconnected. Secondly, it physically supports the positive bus bar and the negative bar with respect to one another.
Claims20
An electric drive system, comprising:
- two rigid bus bars;
- a power electronics module configured to transform direct current power carried by the bus bars into alternating current power, the power electronics module including a capacitor connected between the two rigid bus bars;
- and
- a molded bleed resistor bonded directly to the bus bars such that the molded bleed resistor rigidly fastens the two bus bars to one another, the bleed resistor configured to dissipate energy from the capacitor.
1 more element
A method of fabricating a bus bar assembly for an electric drive system, the method comprising:
- holding two rigid conductive bus bars in a predetermined position relative to one another but not in contact with each other;
- and
- injecting a substance between the two bus bars which bonds to the bus bars and hardens, thereby rigidly attaching the two bus bars together in the predetermined relative position;
- wherein the substance contains fine carbon particles such that it forms a bleed resistor.
1 more element
A method of assembling an electric drive system, comprising:
- connecting a DC bus bar assembly to a power electronics module, wherein the power electronics module includes a capacitor and an inverter, and wherein the DC bus bar assembly includes a positive bus bar and a negative bus bar rigidly fastened to one another by a molded bleed resistor, the molded bleed resistor bonded to the positive bus bar and the negative bus bar prior to connection to the power electronics module.
Dependencies are inferred from the claim text.