All major manufacturers of three-phase ac induction motors offer “inverter-duty” or “inverter-ready” models, but while these motors have inverter-rated insulation to protect the windings, the bearings ...

Inverters used to control a motor’s speed or torque — also known as variable frequency drives (VFDs) or adjustable speed drives — can induce unwanted motor shaft voltages that cause premature motor ...

When it comes to assuring that a motor provides consistent service for the longest time possible, it’s important to pay attention to the bearing system. Bearing system failures are one of the most ...

The experts at eMotors Direct outline how VFD’s can damage bearings and discuss preventative measures to prevent VFD induced bearing damage Electric motors fitted with VFDs (Variable Frequency Drives) ...

Electric motors fail more often than they should. Sometimes, it is not the motor’s fault. The real issue lies deep within—where current leaks through the bearings. That is where insulated bearings ...

[RimstarOrg] has brought us an oldie but goodie this week. He’s built a ball bearing motor, a design which has been causing engineers and scientists to squabble for decades. [RimstarOrg] used a ...

NTN Corporation is expanding the mass-production and delivery of a high speed deep groove ball bearing developed for motors fitted to electric vehicles (EV) and hybrid electric vehicles (HEV). As ...

Two Aegis SGR Split-Ring Bearing Protection Kits—one for NEMA motors and one for IEC motors—were developed for easy field installation without disassembly of coupled equipment. The Split-Ring kits are ...

Universal bearing supports have precision mounting surfaces predrilled for foot mounting. Flange bearing supports have a compact envelope with a precision pilot diameter and flange face for accurate ...

High efficiency motors can bring significant savings but if budgets won’t stretch to motor replacement, energy efficient bearings offer a powerful cost-saving alternative. Up to 80% of all electric ...

We see our share of pitches for perpetual motion machines in the Hackaday tips line, and we generally ignore them and move along. And while this magnetic levitation motor does not break the laws of ...

Electric motors fitted with variable frequency drives are at risk of bearing damage due to a build-up of current in the rotor that discharges through the shaft, damaging the lubrication and bearing ...