1. Sensors
the reader is referred to the articles Electrical engineering measurements .
Machine controls require measurements, and therefore sensors, except in special cases where limited performance is accepted and these components are spared. Variable speed drives usually include current and speed sensors. For position control, an additional sensor is required, although it should be noted that the position sensor can provide speed indication by processing the position information.
1.1 Current sensors
Several types of sensor are commonly used.
Resistive sensors (low-inductive resistors) are placed in series on the armature circuit....
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Sensors
DC motor control structures
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