In fact, AC machine is controlled as like as an independent stimulation DC machine
using vector control .
Automatic speed control on curves, while possible with dc machines
, was more readily achieved with the controllers needed to operate variable-speed ac motors, von Holt said.
Meanwhile, Sidel says three of its SBO20 DC machines
and one SBO16 DC model have been installed by U.
They made generators, alternators, DC machines
, AC machines, control equipment, domestic appliances.
Originally, three Model DC machines
were installed, together with a larger SNK bridge mill.
According to one of the developers of the new technology, "Independent armature and field control of a DC motor can utilize the advantages of series and shunt DC machines
, providing high starting torques under a variety of shaft loading conditions.
Through the appropriate use of reference frame theory, Electromagnetic Motion Devices, Second Edition introduces readers to field-oriented control of induction machines, constant-torque, and constant-power control of dc, permanent-magnet ac machines, and brushless dc machines