A DC link is an element connected between multiple power supplies. It can both couple these power supplies and act as a buffer storage for electrical energy. In practice, it is used to synchronize frequencies of different power supplies, for example. Its industrial use in electric drives offers further advantages, because it helps to conserve energy. Since DC links can act as an energy store, they can also be operated as a generator, e.g. to store braking energy for other uses. They can also be used to mitigate power peaks.