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How to schedule

To schedule private education for your group, contact:

Dale Shuter, CMP
Meetings & Expositions Manager
+1 314 993 2220, ext. 3335
dshuter@easa.com

1 hour of training

$300 for EASA Chapters/Regions
$400 for member companies
$800 for non-members

How a webinar works

All EASA private webinars are live events in which the audio and video are streamed to your computer over the Internet. Prior to the program, you will receive a web link to join the meeting. 

The presentation portion of the webinar will last about 45 minutes, followed by about 15 minutes of questions and answers.

Requirements

  • Internet connection
  • Computer with audio input (microphone) and audio output (speakers) appropriate for your size group
  • TV or projector/screen

Zoom logo

The Zoom webinar service EASA uses will ask to install a small plugin. Your computer must be configured to allow this in order to have full functionality. Please check with your IT department or company's security policy prior to scheduling a private webinar.

Private Webinars

EASA's private webinars are an inexpensive way to bring an EASA engineer into your service center, place of business or group meeting without incurring travel expenses or lost production time.

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Convention presentation

Mitigating Harmonics and Detrimental Waveforms Caused by VFDs

  • June 2014
  • Number of views: 5230
  • Article rating:

Rick Hoadley
ABB, Inc.
New Berlin, WI

Whenever an application engineer is planning on installing adjustable speed drives for AC motors, line current harmonics and reflected waves are two factors that need to be addressed. Four basic questions should be answered in order to successfully commission the drive system:

  1. What is my power system like today
  2. What impact will the additional drive(s) have on the power quality for the other equipment
  3. If needed, what harmonics mitigation method should be used
  4. How long and what type of cable is used between the drive and motor

This paper, originally presented at the 2014 EASA convention, deals with understanding IEEE Std 519 and various mitigation methods in order to meet those recommendations. It also reviews the types of filtering that is available to reduce the reflected waves, first turn insulation stress, and common mode voltages seen at the motor terminals.

  • Overview of drives topologies
  • The differences between 6,12,18 pulse and active front end drives
  • How the differences in drives relate to harmonics generated
  • Filters on either end of the drive to mitigate the effects of harmonics, as well as voltage spikes and other potential damaging effects on the motor

Available Downloads



EASA Technical Manual

More information on this topic can be found in EASA's Technical Manual
  • Section 5: Electronics

Related Reference and Training Materials

Principles of Medium & Large AC Motors (NEMA Standards)
  • Section 6: Motor Standards

Principles of Medium & Large AC Motors (IEC Standards)
  • Section 6: Motor Standards

Tags: Variable frequency drives Harmonics
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