Cascaded Multi-phase Electric Drive
Publication Date: 2014-Apr-30
The IP.com Prior Art Database
This paper proposes a cascaded multi-phase electric drive, including: a multi-phase power transformer, including at least one primary winding and a first number of secondary windings, said primary winding being electrically connectable to a source of multi-phase AC power; a first number of power units, each of said first number of power units having input connected with a corresponding one of said first number of secondary windings, and a multiple of said first number of power units being serially connected with respective others of said power units in each phase output line connectable to a multi-phase AC load; a main controller; and a first number of power unit controllers, each of which being adapted for controlling corresponding one of said first number of power units; wherein: said main controller is adapted for transmitting output voltage reference to each of said power unit controllers controlling the power units in the same phase output line; and said power unit controller is adapted for controlling switching of the corresponding power unit according to PWM pattern in consideration of said output voltage reference received from said main controller. Therefore, the amount of calculation load for the main controller can be reduced.