Electric Machine Rotor Bar: Real or False Positive? A Case Study

Vibration, electrical and current signature analysis are technologies that can provide a great deal of information on the condition of our electric machines. In this case study an 1800 RPM, 715 RPM, 4000-volt vertical electric motor originally was operated across-the-line as shown in Figure 1...

Howard Penrose
MotorDoc LLC

Webinars

Motor Testing

Electrical and Current Signature Analysis of Unloaded and Loaded Electric Motors

In this presentation we will demonstrate both ESA and MCSA using two separate systems comparing various loads. This will also demonstrate how expert-ESA/MCSA combined with ML/AI can both immediately detect existing conditions as well as long-term anomaly detection. We will also use the opportunity to demonstrate changes in losses in bearings under different load conditions.

Howard Penrose
MotorDoc LLC

Articles

Motor Testing
Vibration Analysis

The Scope and Application of Electrical Signature Analysis in Windpower

Electrical Signature Analysis (ESA) was initially developed at Oak Ridge National Labs (ORNL) in the 1980s as a method for evaluating bearings and gears in motor operated valves in the nuclear power industry. In 1992, the technology was licensed into general industry for applications in utilities and commercial applications...

Howard Penrose
MotorDoc LLC

Articles

Condition Monitoring Management & AI

The Disturbing Direction of Condition-Based Monitoring

Terms like predictive maintenance, condition based maintenance, and reliability-centered maintenance, have undergone commercially-driven changes for over 30 years...

Howard Penrose
MotorDoc LLC

Articles

Alignment + Balancing
Ultrasound
Vibration Analysis

Commercial and Industrial Power System Losses and Mitigation through Neutral and Ground

Even in discussions related to power harmonics most engineers, let alone reliability and energy professionals, understand the potential losses through the system. When it comes to harmonic content in neutral and ground in single and three phase systems, and the related losses, there has been limited attention...

Howard Penrose
MotorDoc LLC

Five Minute Facts

Motor Testing

Electric Motor Testing: The Power Factor

Howard Penrose explains the power factor of an electric motor, using an example from a real motor…

Howard Penrose
MotorDoc LLC

Five Minute Facts

Motor Testing

What Can We See with ESA and MCSA?

If I take my data between the controls and the motor, current signature shows downstream toward the load and process, while voltage signature shows upstream toward the generator. And it shows the whole system at once…