The present invention comprises an isolated dual power supply having an internal feedback loop.

A dual supply circuit for a motor vehicle including a regulated DC supply and a regulated AC supply.

A controller for a doubly-fed induction generator, the doubly-fed induction generator comprising a stator and a rotor.

The solar dual-supply circuit can realize solar cell supply and dual supply, which is not only environmentally friendly and energy-saving but can also ensure the supply demand of the load.

A controller for a doubly-fed induction generator, the doubly-fed induction generator comprising a stator and a rotor.

A smooth switching device and method for double power supplies.

The disclosed system and method uses a wind turbine generator (12) having a doubly fed induction generator (14).

The engines possess a double power supply which means that the retention of the position and other parameters is guaranteed.

In one variation, the dual air supply breathing apparatus uses a Y-shaped changeover valve (100) with two input tubes (102 and 106) and one output tube (110).

The invention relates to a rotating electric machine, in particular a double-fed asynchronous machine in the performance range between 20 and 500 MVA, comprising a rotor which rotates about an axis and is concentrically surrounded by a stator.