Reference Manual User Manual

8 Rockwell Automation Publication 1606-RM001B-EN-P - August 2013
Bulletin 1606 Switched Mode Power Supplies
9. Efficiency and Power Losses
*) The average efficiency is an assumption for a typical application where the power supply is loaded with 25% of the nominal load for 25% of the time, 50% of the nominal load for another 25% of the time, 75% of
the nominal load for another 25% of the time and with 100% of the nominal load for the rest of the time.
AC 100V AC 120V AC 230V
Efficiency typ. 92.0% 92.7% 94.0% at 24V, 20A
typ. 91.6% 92.4% 94.0% at 24V, 24A (Power Boost)
Average efficiency
*)
typ. 91.3% 92.0% 93.3% 25% at 5A, 25% at 10A,
25% at 15A. 25% at 20A
Power losses typ. 6.5W 3.9W 2.6W at 24V, 0A
typ. 21.1W 20.1W 17.0W at 24V, 10A
typ. 41.7W 37.8W 30.6W at 24V, 20A
typ. 52.8W 47.4W 36.8W at 24V, 24A (Power Boost)
Fig. 9-1: Efficiency vs. output current at 24V, typ Fig. 9-2: Losses vs. output current at 24V, typ.
Fig. 9-3: Efficiency vs. input voltage at 24V, 20A, typ.
Fig. 9-4: Losses vs. input voltage at 24V, 20A, typ.
Ef f i cie ncy
4 6 8 101214 1820 24A
86
87
88
89
90
91
92
93
94%
100Vac
120Vac
230Vac
Out put Current
16 22
Pow er Losses
02 68 1214 24A
10
0
20
30
40
60W
18 20
50
4 10 16
Output Current
22
120Vac
100Vac
230Vac
Ef f i cie n cy
120 180 230 264Vac
89
90
91
92
Input Voltage
93
94
95%
100
Power Losses
120 180 230 264Vac
20
25
30
35
Input Voltage
40
45
50W
100