In contrast, known Ethernet power and data distribution systems generally allow for a star connection topology only.
A terminal box made of plastic of this invention incorporates an electromagnetic contactor which is used for switching the delta connection of the field coils in a three-phase induction motor (M) to the star connection and vice versa.
The AC power supply system (5) adopts a three-phase star connection, and the neutral point thereof is grounded.
A star-connection-to-2-delta-connection conversion transformer for electric equipment.
One end of the star connecting circuit is connected to the wire, the other end of the star connecting circuit is connected to one end of the capacitor, and the other end of the capacitor is connected to an input wire.
The nine-phase SRM is driven by a power converter with ten switching elements. one ends of all phase windings are connected to a common neutral point N of a star-connection.