The primary winding (called the power winding with [P.sub.p] pole-pairs) is directly connected to the grid and the secondary winding (called the control winding with [P.sub.c] pole-pairs) is connected to the grid through a bi-directional ac-dc-ac converter.
sign) sequence of the control winding with respect to that of the power winding, respectively.
One of the most important advantages of the vector-control technique applied on the BDFRG is that the electromagnetic torque and the reactive power of the power winding can be achieved in an inherently decoupled fashion (Ademi and Jovanovic 2012).
It can be clearly observed from (20) that the instantaneous electromagnetic-torque control can be easily achieved via controlling the q-axis control-winding current, [??] Moreover, equation (21) proves that the reactive-power control of the power winding is realised by controlling the d-axis control-winding current, [??] This is attributed to the approximately constant level of the total power-winding flux, [[lambda].sub.p] as a result of the direct connection of the power-winding terminals to the gridside terminals.
It can be concluded from (20) and (21) that the machine electromagnetic torque and the reactive power of the power winding became completely decoupled based on the proposed power-winding flux orientation technique.
"Typical generators have weld auxiliary power windings
. The PipePro's generator has auxiliary power windings
only The auxiliary power generated is 230 V, three-phase and single-phase, as well as 120 V, single-phase.