Showing articles 1 - 10 (72 total)

Enerdoor at SPS Drives

Enerdoor showcased at the SPS Drives show in Nuremberg, Germany this month.  Booth visitors had a chance to check out our new active and passive harmonic filters and to learn more about Enerdoor EMI-RFI filters, motor protection and CE Certification. 

Posted 4 days, 6 hours agoViewed 24 times

EMI-RFI Filters for OEMs Using VFDs and Servo Drives

As one of the largest EMI-RFI filter manufacturers in the world, Enerdoor offers solutions to customers needing an EMI-RFI filter in conjunction with single or multiple variable frequency drives (VFDs) and servo drives.  

It can be challenging for OEMs, system integrators and distributors to find the proper EMI-RFI filter to use inside a cabinet that has multiple VFDs or servo drives.                    

Drive manufacturers often recommend installing a single EMI-RFI filter for each individual drive. This results in increased cost, more space being used inside the cabinet, and a higher leakage current. Typically, drive manufacturers do not stock EMI-RFI filters, due to the fact they view filters as an accessory and feel they are not responsible for supplying all necessary components in the final system. This tends to make it difficult to purchase these devices.

The Solution
Enerdoor proposes one filter per machine instead of one filter per drive. Using a single filter per machine instead of one per drive offers the following advantages:  

Technical:  Low leakage current; protects the entire machine instead of only the drive. 

Economical: Using only one filter costs less, requires less mechanical space, reduces potential quality issues due to faulty wiring, and accelerates installation time.

The Result
Enerdoor’s unique combination of being an EMI-RFI filter manufacturer and decades of experience with the Enerdoor EMC mobile laboratory has allowed us to comprise a list of filters compatible with the major VFD and servo drive manufacturers of the world. 

All filters listed here have been tested in systems utilizing single or multiple VFDs. If a drive manufacturer is not listed, please contact Enerdoor for the appropriate solution.

Contact Us Now - FREE Consult

Posted on 11/09/2018 at 01:45 pmViewed 180 times

Enerdoor Product Catalog Update

Hot off the press!!  Enerdoor's new product catalog is available for download.

Posted on 11/02/2018 at 11:20 amViewed 5,140 times

Enerdoor Proudly Partners With Electromate As An Authorized Distributor

With offices across Canada and in Delaware, Electromate specializes in Robotic and Mechatronic Solutions for the Industrial Automation marketplace.  Electromate’s Core Purpose is to help Manufacturers compete globally by building better machines using differentiated automation technology.   

To order EMI-RFI filters, motor protection products and CE Certification directly from Electromate, please visit; or to place an order call 877-378-0240 or email

Posted on 10/26/2018 at 12:21 pmViewed 210 times

EMI-RFI Filters Reduce High Frequency Electromagnetic Noise

EMI-RFI Filters are an electronic device used to suppress conducted interference from a signal or power line. Most electronics require an EMI filter either as a separate device or as a built-in circuit board to reduce high frequency electromagnetic noise between the drive and the mains power supply.

Since 1992, Enerdoor has been a global leader in EMI-RFI filters offering single phase, three phase, and three phase + neutral filters. 

For more information on EMI-RFI filters, please visit: 

Posted on 08/20/2018 at 01:56 pmViewed 530 times

Enerdoor Custom Filter Solutions

In addition to our complete offering of standard EMI-RFI and motor protection filters, Enerdoor offers custom filter solutions for unique applications and mechanical requirements, and provides filtering in ranges not offered in our standard products.

Our global support and flat rate EMC testing service by industry experts, gets your product to market in a reduced time and at a lower cost.

For more info please visit - or email   

Posted on 06/22/2018 at 10:46 amViewed 728 times

Voltage Stabilizers

Enerdoor specializes in single and three phase voltage stabilizers that regulate voltage through a series of transformers. Find out more about this extensive series and how you could save money today -

Posted on 06/13/2018 at 04:40 amViewed 860 times

Filter Solutions For Medical Applications

The Enerdoor medical filter series is designed to achieve a high level of shielding on protected environments. All models are characterized by high levels of attenuation from 60 dB with a frequency range from 9 KHz  to 10 GHz. For each application, there are suitable models for filtering supply lines from 50 Hz from single phase to three phase - designed for currents up to several hundred amperes.

For more information -

Posted on 06/05/2018 at 06:48 amViewed 762 times

Single-Phase EMI Filters Protect The Power Supply


EMI-RFI filters are typically installed on the main power line. However, did you know that single-phase filters may also be used to protect the power supply, PLCs, and sensors?  This white paper explains the benefits of using a single-phase EMI filter to protect these types of equipment. 

Switching devices within a machine generate radio frequency (RF) noise which travels back to the power line of the facility. When an EMI-RFI filter is installed, it blocks this RF noise. However, did you know that EMI-RFI filters can also protect equipment from RF interference and voltage spikes that could be coming in from surrounding equipment?  

The Challenge

A power supply requires clean power in order to avoid noise or interference that could affect sensor life or machinery performance. Larger facilities have several different types of equipment which create RF interference and voltage spikes that affect other devices.

Imagine a power supply installed inside a machine located in a large facility surrounded by other large pieces of equipment. How do you think the output supply and sensors are affected?

The Solution

To minimize the risk of interference, install an EMI-RFI filter on the power line. For example, in a three-phase machine application, the filter would protect the entire machine. It would protect the two-phase power line, including the power supply, PLCs and sensors.

The Result

A compact EMI-RFI filter on the power supply input reduces the risk of noise interference in the field and increases machinery life.  Enerdoor is committed to providing the highest level of customer support possible and bringing value to our customers.

For more info on Enerdoor EMI-RFI filters, click here

Posted on 05/30/2018 at 06:34 amViewed 807 times

Highlights From This Months Shows In Italy And Spain!

This month Enerdoor exhibited at the SPS Parma trade show in Parma, Italy and at BIEMH in Bilbao, Spain.  Please check back for info on future shows.  

Enerdoor is committed to power quality and electromagnetic solutions for automated machinery and industrial plants. Our product line includes: EMI-RFI filters, motor protection, harmonic filters, line reactors, surge arresters, voltage stabilizers, and flat-rate CE Certification. 

For further information on our extensive range of power electronics, please call our team at 207-210-6511 or email

SPS Parma show:

BIEMH show:

Posted on 05/30/2018 at 05:07 amViewed 728 times

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