7.2.1 Steady State Condition

Steady state current waveform for input Vac 400-Vrms/50H and output 700-V DC are shown in Figure 66 and Figure 67 for different load conditions 960 W and 1865 W, respectively.

Figure 66. Steady State 400-Vac IN 50 Hz, 700-V DC OUT 960 W, iTHD 7%

Figure 67. Steady State 400-Vac IN, 700-V DC OUT 1865 W, iTHD 3.5%

Table 5 lists the detailed test results of this design under varying load conditions.

Figure 68 shows the efficiency data plotted under these test conditions.

Figure 68. Efficiency at 400-Vac IN and 700-V DC OUT

Figure 69 shows the THD data plotted under these test conditions.

Figure 69. THD at 400-Vac IN and 700-V DC OUT

Figure 70 shows the PF data plotted under these test conditions.

Figure 70. PF at 400-Vac IN and 700-V DC OUT

Figure 71 shows the thermal camera image when operating the board is at 2.4 kW. Except for the inrush-current control thermistors, the board runs below 60º Celsius. Figure 71 shows thermal image of the vienna rectifier board when operating at 2.4 kW with high-line 230-Vrms L-N input voltage and 700-V DC bus output voltage.

Figure 71. Thermal Camera Image of Vienna Rectifier Operating at 2.4-kW, 230-Vrms VL-N Input, 700V DC Output