Eaton PowerXL DC1 Series - Variable Frequency Drives for Single-Phase AC Motors

11 Annex
11.5 Variable frequency drives for single-phase AC motors
DC1 variable frequency drive 12/13 MN04020003Z-EN www.eaton.com 185
11.5 Variable frequency drives for single-phase AC motors
Starting the motor properly requires a special method. The variable
frequency drive will start the motor directly with the motor's rated opera-
tional frequency (P-32), while the voltage, starting from the boost start
voltage (P-11), will be increased to the motor's rated operational voltage
(P-07) within the boost time (P-33) period.
After the boost start process, the variable frequency drive will start adjusting
the motor's speed by changing the output frequency.
The curves in figure 95 below show how this function works.
Figure 95: Startup behavior
a Setpoint value
Figure 94: DC1-S…
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L1/L
L2/N
L3
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U
V
W
1
2
3
4
5
6
7
8
9
10
11
P-33 P-04
①
t
P-11
P-07
U
P-33 P-04
①
t
P-32
f