Copley Controls 7228AC, Руководство пользователя

Страница: 27 / 171

7XX8 Series Digital Servo Amplifier User Guide
2-13
Hall Sensors Hall Sensors
Hall Sensors Hall Sensors
Hall Sensors
The controller performs a phase initialization routine,
using the encoder for proper commutation. However,
improved phase initialization can be achieved using Hall
sensors to determine initial positioning. Typical Hall
signals are shown in Figure 2-10.
Figure 2-10 Hall Signals
Hall Input Circuit Hall Input Circuit Hall Input Circuit Hall Input Circuit Hall Input Circuit
The same Hall input circuit (Figure 2-11) is used to
receive Hall signals: phase U, phase V, and phase W.
The circuit is designed to work with single-ended TTL
signals and single-ended open-collector signals.
Input circuit
same for all Hall signals
22k
+5V
10k
10nF
Copley Amplifier
HCT14
Figure 2-11 Hall Input Circuit
Phase V
Phase U
Phase W
One Electrical Cycle
All 6 states
Typical 120 Degree Halls shown