ELEC 255 Lecture Notes - Lecture 4: Brushless Dc Electric Motor, Field Coil, Magnet
Document Summary
Topic: dc motor speed, position measurement and control. The field windings and armature of the dc motor can be wired in various ways. The motor design is referenced by the method these two components are wired together. In addition, many motors are using permanent magnet fields. Also, many newer motors are designed to be brushless. Series wound motors with current flowing first to the field windings, then to the brushes, through the commutator and the armature winding contacting the brushes at that time, then through the grounded brushes back to the battery source. This design permits all of the current that passes through the field coils to also pass through the armature. Shunt motors have the field windings wired in parallel across the armature. Shunt means there is more than one path for current to flow. A shunt wound field is used to limit the speed that the motor can turn.
