Aerotech BLMF Series, Manual

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BLMF Hardware Manual Assembly and Installation
2.8. Hall-Effect Operation and Motor Phasing
In linear servomotors, one popular method of commutation is with Hall-effect sensors. They sense the
presence of a magnetic field and provide an output as a function of the forcer position. Aerotech linear motor
Hall sensors provide a unique set of Hall sensor outputs every sixty electrical degrees. Therefore the forcer
position can be resolved to any of six segments over 360 electrical degrees. The Hall sensors used in the
linear motors have an open collector output.
Figure 2-7 shows the motor BEMF versus Hall signal
relationship if observed.
Figure 2-7: Linear Motor Phasing
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