Motor Testing
Rotor Casting Voids
Casting voids do exist, however it wasn't until the late 1980's when we started to notice these with new technology...
- Howard Penrose
- MotorDoc LLC
In-Rush Start-Up Current Test Prevents Catastrophic Pump Failure
The nameplate information for the 2B circulating water pump showed 4,000 V, 3,000 HP, 409 FLA, and 355 rpm. It had 240 slots and 196 bars. While this is not normal information to include on the nameplate, especially on older motors, it is good information for the specialist to have...
Electric Motor Fault
In this article we are going to take a look at a fault on an electric motor and then attempt to explain why the vibration changed in the way that it did...
- Jason Tranter
- Mobius Institute
Motor Testing, Which Road Will You Take?
There are twelve interdependent elements in planned maintenance that are integral to a successful process. Each element contributes to and provides support for the others. The linked elements, in total, provide the base for the Planned Maintenance Process...
- Dave Humphrey
- Allison Transmission
CMMS – Friend or Foe?
In every good maintenance program, there needs to be a place to store a history of problems found and actions taken if we are to learn from our experiences and continuously improve...
- Paul Dufresne
- Reliability Playbook, in Partnership with Lubrication Engineers
Direct Current Motor Electrical Evaluation Using Motor Circuit Analysis
Direct Current electric motors operate under a basic principle of electricity: interaction between two magnetic fields positioned at an angle from each other will attract/repel resulting in movement...
- Howard Penrose
- MotorDoc LLC
Tips for a Lean Approach to Motor Reliability
Maintaining the highest reliability standards for electric motors is the goal of every company. Unfortunately, in an era that emphasizes lean operations, too many businesses fall short. When they do miss the mark, the costs for either repair or replacement can be prohibitive...
- Noah Bethel
- PdMA Corporation
Motor & Generator Storage
Electrical machine (motors & generators) storage will affect the life of the equipment...
Multi-Technology Approach to Motor Diagnostics
One example is your vibration technician suspects a possible rotor problem in a critical application, but the cost to replace means a shutdown of production...
- Howard Penrose
- MotorDoc LLC