
362 Electrotechnical Systems
In the diagram in Figure 6.50 the switches 1, 2 are shown to operate in the follow-
ing way: Switch1 activates control of the ballast load, when the SG power decreases
down 0.2P
mnom
; during its increase to 0.35P
mnom
, the value of the ballast that is formed
at this moment is preserved because the integrator output switches off. With further
increase in power to 0.4P
mnom
, Switch2 closes, the negative signal is applied to the
integrator input, and the integrator output decreases smoothly to zero, setting the
ballast power equal to zero too.
A number of scopes are set to observe system functioning. The scope PMSM
xes the ...