Matronics Email Lists :: View topic - Electric engine noise problem

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Electric engine noise problem

Matronics Email Lists Forum Index -> AeroElectric-List

View previous topic :: View next topic

Author Message

lgold(at)quantum-associat
Guest

Posted: Thu Sep 03, 2015 6:54 am Post subject: Electric engine noise problem

Bob,



  I built a small  electric motor glider that has a 30+KW DC motor. The motor controller sends  electric pulses to the motor at various frequencies to control the motor. The  batteries put out about 100 volts and at times 250-amps are going through the  controller to the motor. The batteries and controller are not grounded to the  frame to prevent potential catastrophic shorts since the lithium pack would put  out  thousands of amps if shorted. 



  My problem is  that these pulses cause extreme radio noise on my hand-held ICOM radio and I  cannot hear any communications. Is there an easy fix for this  issue?



  Regards,

Les

   [quote][b]

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

nuckolls.bob(at)aeroelect
Guest

Posted: Thu Sep 03, 2015 7:14 am Post subject: Electric engine noise problem

At 09:54 AM 9/3/2015, you wrote:

  	  Quote: 	
		  Bob,

 I built a small electric motor glider that has a 30+KW DC motor. The motor controller sends electric pulses to the motor at various frequencies to control the motor. The batteries put out about 100 volts and at times 250-amps are going through the controller to the motor. The batteries and controller are not grounded to the frame to prevent potential catastrophic shorts since the lithium pack would put out  thousands of amps if shorted. 

 My problem is that these pulses cause extreme radio noise on my hand-held ICOM radio and I cannot hear any communications. Is there an easy fix for this issue?

 Regards,

 Les

 	


    Probably not. Your project is perhaps the most

    profound demonstration for why we do a LOT of

    testing to agreed-upon limits before putting

    hardware in the airplane.



    Pulse width modulated controllers from heated

    seats to blowers to flap systems have offered

    some challenging situations to designers . . .

    mostly having to do with RF tight packaging

    backed up with good filters at the enclosure

    wall.



    The last 150+ amps flap controller I had any

    contact with had about a killobux worth of

    rather expensive capacitors in a filter array

    on an etched circuit board.



    Lacking details on your particular suite

    of hardware, I'm unable to be more specific.

    Perhaps pictures, schematics and data on your

    purchased hardware will lend more insight for

    offering advice. 



 



 

   Bob . . .    [quote][b]

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

Display posts from previous:

	Matronics Email Lists Forum Index -> AeroElectric-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum