Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 18-08-2007, 18:39   #1
Registered User
Thermal's Avatar

Join Date: Jul 2005
Location: Honolulu
Boat: S2 11.0C 36' Puka Wai
Posts: 157
Images: 1
Inverter fireworks.

I had some unexpected fireworks on the 4th of July when I switched on my small (1500W) inverter. There was nothing plugged on at the time. It has since been replaced, and I just got around to taking the old one apart to look inside. I'd really like to know what happened, even though I only have a vague idea of how these things work. I'm guessing that the high-power transistors switch DC current on and off to generate 60HZ square-wave AC, and for some reason the 6 on the "hot" side of the output fried - many of the transistor leads are melted. These 12 transistors are in contact with the case/heatsink with thermal paste. Anybody have any idea what happened here? I could probably get some more fo these transistors and replace them for little money, and maybe the thing would work again as a spare, but that would be pointless if something else caused these transistors to melt down.
Attached Thumbnails
Click image for larger version

Name:	BurnedInverter.jpg
Views:	96
Size:	138.4 KB
ID:	1701  
In theory, Practice and Theory are the same. In practice, they are not.
Thermal is offline   Reply With Quote
Old 18-08-2007, 21:39   #2
Registered User
Viking Sailor's Avatar

Join Date: Nov 2006
Location: San Francisco Bay
Boat: Fantasia 35 - s/v Feeling Good
Posts: 978
Sorry, but the PC board is fried!
Viking Sailor is offline   Reply With Quote
Old 18-08-2007, 21:58   #3
Registered User
NoTies's Avatar

Join Date: Nov 2005
Location: Vanuatu
Boat: Whiting 29' extended "Nightcap"
Posts: 1,336
Images: 2
Read, disposable electronics, non conformal coated, salt water/spray.

Positively, socially deviant.
NoTies is offline   Reply With Quote


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Inverter Out to Batt Charge In - whoops S/V Elusive Electrical: Batteries, Generators & Solar 6 13-04-2007 08:57
sine inverter beau Electrical: Batteries, Generators & Solar 8 19-03-2007 09:15
New Inverter Question Greg B Electrical: Batteries, Generators & Solar 2 09-08-2004 12:37
heart inverter irwinsailor Electrical: Batteries, Generators & Solar 1 25-07-2004 12:53

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 15:46.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.