These magnetic forces work to attract each other, inducing a torque on the armature shaft, causing it to turn. This EM field inter-acts with the magnetic fields of the permanent magnets in the motor (in the case of a permanent magnet motor) or with the electro-magnetic field created by the stator (in the case of a universal motor). When energized, an electro-magnetic field is generated in the motor armature. The turns in every coil wrap around the iron stack to create an electro-magnet. Each wire is insulated with an enamel coating, isolating it from every other wire in the loop, and only terminates at a commutator bar. The wire can vary in gauge as is required for the design of the motor. Loops are either single or parallel conductors (wires), and can circle any number of times around the stack teeth (called turns in a coil). The winding continues to loop all the way around the armature in the same manner. Basic Armature DesignĪn armature (pictured on right) has a continuous series of windings from each bar on the commutator, which loop around the iron stack teeth and connect to the next bar on the commutator. But first we must understand some basics of armature design. If you have access to a volt/ohm meter, there are three quick checks you can do that will tell you if a motor armature is functioning properly. Occasionally we get this question from our customers, “How can I do a quick check on my armature to see if it is ok?”
#Motor winding resistance chart how to#
Watch the video: how to check a motor armature.