Aerotech BM Series, Руководство по оборудованию

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BM/BMS Series Hardware Manual Introduction
www.aerotech.com 1-7
1.4. Resolver Commutation
An optional resolver can be used as the feedback device for a brushless rotary motor. The
resolver is aligned at the factory, so that the null position of the resolver corresponds to a
motor phase angle of zero degrees (refer to Figure 1-6). The null position of the resolver
is considered to be the point at which the sine feedback signal is resting at a zero level
and the cosine signal is resting at its positive peak.
The sine and cosine signals shown in Figure 1-6 represent
demodulated waveforms. In actual operation, these
signals are transmitted on a high frequency carrier (e. g., 5
KHz, 10 KHz).
The zero degree phase angle of the motor is defined as the position that the motor shaft
will align to if phase A is energized with a positive voltage with respect to phases B and
C. The 8 pole motors (4 pole pairs) have 4 zero degree points per revolution, and the 6
pole motors have 3 zero degree points per revolution.