Xylem Aquavar - Page 41

vector modulation). SFAVM switches throughout the entire cycle, where 60° AVM only
switches 2/3 of the time.
The maximum switching frequency is 16 kHZ for 60° AVM and 10 kHz for SFAVM. The
discrete switching frequencies are shown in the following figure.
Table 6: Switching patterns
50˚C
52˚C
110
60
100
70
80
90
1 2 3 4 5 6 7 8 9
A
B
Figure 43: 60° AVM, High Overload HO, 150%
50˚C
52˚C
100
50
70
80
90
1 2 3 4 5 9
A
B
60
45˚C
6 7 8
Figure 44: 60° AVM, Normal Overload HO, 110%
50˚C
52˚C
110
50
100
70
80
90
1 2 3 4 5 6
A
B
60
45˚C
Figure 45: SFAVM, High Overload HO, 150%
50˚C
52˚C
110
50
100
70
80
90
1 2 3 4 5 6
A
B
60
45˚C
40˚C
Figure 46: SFAVM, Normal Overload HO, 110%
A
% of drive output, nominal HO current
B F
SW
(KH
Z
)
4 Mechanical Installation
Aquavar
®
Intelligent Pump Controller - 150 HP to 600 HP INSTRUCTION MANUAL 39