Commutator and Brush Data for PMDC Motors

To access the commutator and brush data, double-click the Machine > Commutator entry in the Project Manager tree.

The Commutator Data Properties window contains the following fields:

Commutator tab	Commutator Type	The type of commutator. Click the button to open the Select Commutator Type window and select from Cylinder or Pancake.
	Commutator Diameter	For a Cylinder commutator type, the diameter of the commutator.
	Commutator Length	For a Cylinder commutator type, the length of the commutator.
	Outer Diameter	For a Pancake commutator type, the outer diameter of the commutator.
	Inner Diameter	For a Pancake commutator type, the inner diameter of the commutator.
	Commutator Insulation	The thickness of the insulation between the two commutator bars.
Brush tab	Brush Width	The width of the brush.
	Brush Length	The length of the brush.
	Brush Pairs	The number of brush pairs.
	Brush Displacement	The displacement of the brush from the neutral position, in mechanical degrees (positive for anti-rotating direction).
	Brush Drop	The voltage drop across a one-pair brush.
	Brush Press	The brush press per unit area. (Available only when Frictional Loss is set to zero for the machine.)
	Frictional Coefficient	The frictional coefficient of the brush. (Available only when Frictional Loss is set to zero for the machine.)