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Shaft & Bearing Currents

Event specifics
Type of education: 
Webinar
Date of the event: 
Wednesday, March 18, 2020 - 12:00pm to 1:00pm
Central Time Zone
Instructor: 
Chuck Yung, EASA Senior Technical Support Specialist

This webinar will explain what shaft currents are, what causes them, and differentiate between the two common causes:

  1. Circulating currents which affect DC motors and AC motors not operating from a drive
  2. Shaft currents caused by operation from a VFD, and how to tell the difference between the two.

This webinar will also discuss and compare methods to mitigate shaft currents and explain why the different causes of shaft currents require different solutions. The webinar will include:

  • Shorted rotor iron
  • Uneven air gap
  • Unbalanced voltage
  • What type of grounding brush works best?
  • Role of carrier frequency in causing shaft currents
  • How to recognize the problem on site
  • Insulation thickness, capacitance, and types of insulated bearings

This webinar will be useful for engineers, service center managers, mechanics and anyone interacting with customers.

Target audience: 

This webinar will be useful for engineers, service center managers, mechanics and anyone interacting with customers.

Price
Member price: 
FREE
Nonmember price: 
$199 per site