Emerson FM-3 Podręcznik Użytkownika Pobierz pdf (Strona 189)

170

Epsilon Eb and EN Drives Reference Manual

Figure 125: CW Electrical Angle Plot

In Figure 124 the electrical angle decreases from left to right and the positive peak of V

occurs at zero degrees electrical. In Figure 125 the electrical angle increases from left to right

and the negative peak of V

occurs at zero degrees electrical. Note that with a CW reference

rotation the negative peak of V

is at zero electrical degrees and the electrical angle

decreases from left to right.

Note

If you cannot obtain a stable angle measurement between U or Z and V

, check the

encoder to verify it has the proper cycles per revolution for your motors pole count.

Establishing a Standard Alignment

A typical encoder alignment practice is to set the rising edge of U to zero crossing of the rising

wave of V

with the motor rotating CCW.

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Emerson FM-3 Podręcznik Użytkownika Strona 189