AC/DC general motor rotational speed and power regulation circuit

Published:2011/4/18 1:08:00 Author:Nicole | Keyword: AC motor, DC motor, rotational speed, power | From:SeekIC

In AC/DC general motor(commutator motor), excitation winding in series with armature winding, so in AC power supply, the field direction and armature current direction is changed synchronously, so the rotation direction is not changed. Figure (a) shows its typical characteristic curve, figure (b) shows the relationship curve between motor rotational speed and conduction angle, figure (c) is steady speed circuit. The control angle is relative to the voltage on RC link in trigger loop, this voltage is the difference between applied voltage and armature voltage, so it has the function of negative feedback stabilizes rotational speed.



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