2.1.8 S8: Continuous-operation periodic duty with related
load/speed changes
Operation as shown in Figure 2.10.1 which is composed of a sequence of similar
duty cycles with cycle duration tS; each of these cycles comprises a time with
a constant load and a certain speed; then one or more times with different loads
which correspond to different speeds, for example, by pole reversal. There is no
interval or idle time.
This mode cannot be recorded with one simple formula. A suitable continuous
load must be used as the reference dimension for the load cycle: