AN2512

List of figures

3/38

List of figures

Figure 1.

Top layer circuit schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 2.

SMPS circuit schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 3.

Phase circuit schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 4.

Clock management network schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 5.

Connectors schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 6.

Flow chart of phase reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 7.

Timing for data records reading in 3 phase system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 8.

Data records reconstruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 9.

STPM01 data register structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 10.

Typical profile of output of an energy integrator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 11.

Graph of experimental results of phase n.1 tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 12.

Graph of experimental results of phase n.2 tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 13.

Graph of experimental results of phase n.3 tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 14.

Graph of voltage and frequency influence on phase n.3 . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Figure 15.

Instantaneous voltage (or current) in one voltage cycle of a three-phase system . . . . . . . 25

Figure 16.

Per-phase powers in (a) delta-connected load and (b) wye-connected load . . . . . . . . . . . 26

Figure 17.

Two-wattmeter method in star- or delta-connected load. . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 18.

The wattmeter connections in the three-phase four-wire loads . . . . . . . . . . . . . . . . . . . . . 28