Brushes last longer with ironless core technology due to its low inductance architecture. The low inductance allows faster current reversal at the commutation point, which reduces brush arcing and improves brush life expectancy.

The motor housings are made from iron alloy, with a black oxide finish. Laminations are not required or used in the construction of ThinGap brush motors.

Typically, class 5 ABEC bearings are used. Bearings are easy to change to match customer’s precision requirements, as well as cost.

Typically Neodymium magnets are used in standard products. The magnets are located internal to the moving coil assembly around a center post that becomes the magnetic back iron. The back iron also holds the two armature ball bearings. This construction allows location of the bearing on a component that permits true bearing alignment, resulting in long life.

Motor test data performance curves are the actual results from dynamometer testing. All brush motor tests are performed using variable voltage D.C. power supplies for power in. A power analyzer measures input power with speed and torque measurements obtained from the dynamometer to determine shaft output power. Continuous power output is measured on the dynamometer with the coil temperature stable at the temperature indicated on the data sheets.

Controllers for brush motors must be considered in detail for each application. Low inductance motors require inductance in line with the PWM controller to reduce current ripple. Inductor boards are available to wire in series with the motor leads. Controllers are recommended to have 18 KHz or higher PWM frequencies.