Power capacitor
A power capacitor is described herein. The power capacitor includes a housing and at least one capacitor winding. The power capacitor also includes at least one mechanical spring element between the housing and the at least one capacitor winding.
1. A module for power electronics, comprising:
a capacitor comprising a trough-shaped housing and at least one capacitor winding;
at least one mechanical spring element on a base of the housing; and
an electrical unit having a base region;
wherein the capacitor is mounted on the base region of the electrical unit; and
wherein the spring element is configured to press the at least one capacitor winding onto the base region of the electrical unit.
2. The module of claim 1 , wherein the at least one mechanical spring element comprises a spring element on each of two opposing sides of the at least one capacitor winding.
3. The module of claim 1 , further comprising a profiled insulating shell between the at least one capacitor winding and the housing holding the spring element.
4. The module of claim 1 , further comprising a cooling plate in thermal contact with a cooling surface of the capacitor formed by a current rail on the base of the electrical unit.
5. The module of claim 4 , further comprising an electrical insulating film on a side of the cooling surface facing the electrical unit.
6. The module of claim 1 , further comprising IGBTs.
7. The module of claim 1 , wherein the at least one mechanical spring element comprises a spring pad.
8. The module of claim 1 , wherein the spring pad comprises plastic foam.
9. The module of claim 8 , wherein the plastic foam comprises pores that define gas-tight enclosed cells, the gas-tight enclosed cells storing gas.