52 to 2 Amps 1500 HP DC Drive Project With CoolBLUE

In September Horner was called out to a rubber manufacturer in Tennessee to measure common mode currents on a 1500HP DC Drive. The drive end gearbox had just failed. It was found that they had bearing fluting that went through the DC motor into the shaft of the gearbox and into the bearing. The DC drive was connected to the gearbox and that gearbox was connected to a mixer. It mixed raw rubber for the plant.  They measured that the amps were destructive and could cause damage by bearing fluting in the future and they would have the same problem all [...]