The TPI induction system was a major contributing factor to the shape of the torque curve. The long runners promoted low-speed torque, but restricted power production past 5,000 rpm.

The torque was equally impressive, as the elevated compression made itself known by pushing the torque curve past 1,000 lb-ft (peaking at 1,020 lb-ft at 6,700 rpm).

For instance, an induction motor connected to a 460-V ... therefore, many different torque curves. Let's now look at how a drive provides the frequency and voltage output necessary to change ...