Annular Capacitor with power conversion components arranged and attached in manners uniquely allowed by the ring shaped form factor
First Claim
1. An electrical assembly comprised of a wound film capacitor having the form of an annular ring with an outer diameter that is substantially greater than the thickness of the ring, with electrically conductive contacts located on opposing end faces of said capacitor, with an inner diameter selected to accommodate one or more electrical power control components, where said electrical power control components are located within the inner diameter of said capacitor, and where said electrical power control components are electrically connected with said contacts on said capacitor.
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Accused Products
Abstract
The formation of an assembled unit consisting of an annular capacitor [a wound, metallized dielectric capacitor in the shape of a closed path ring] with other power conversion components arranged and attached in manners uniquely allowed by the ring design will allow higher density converter designs [power/unit volume]. The resulting short connection paths between the capacitor element and the switching semiconductors also provide a very low inductance path that minimizes voltage spikes on the switching semiconductors as a result of turn-off di/dt. The capacitor serves as a short time current source and sink for the switching semiconductors. With the described configuration the RMS current seen by the capacitor can be made more volumetrically uniform enabling more uniform capacitor rise. The single capacitor configured as described also mitigates bus resonance problems often observed in prior art when multiple discrete capacitors are connected in parallel.
11 Citations
24 Claims
- 1. An electrical assembly comprised of a wound film capacitor having the form of an annular ring with an outer diameter that is substantially greater than the thickness of the ring, with electrically conductive contacts located on opposing end faces of said capacitor, with an inner diameter selected to accommodate one or more electrical power control components, where said electrical power control components are located within the inner diameter of said capacitor, and where said electrical power control components are electrically connected with said contacts on said capacitor.
- 13. An electrical assembly comprised of a wound film capacitor having the form of an annular ring with an outer diameter that is greater than the thickness of the ring, with electrically conductive contacts located on opposing end faces of said capacitor, where one or more electrical power control components are distributed around the outside circumference of said capacitor ring, and where said electrical power control components are electrically connected with the said contacts on said capacitor.
Specification