176985602337900

Find freelancers. Lose those costly delays.

With 1.7 million freelancers, we'll match you with the perfect talent.

or, Register with Elance »

Power supply prototype building
Sign in to Add to Watch List

Engineering & Manufacturing > Electrical

View Change History

The client has made the following changes to the job.

Description
Date
Close

Job Description

  |  Change History >>

Updated

Close
  • Posted: Fri, May 25, 2012
  • Time Left: Closed
  • Location: Anywhere
  • Client prefers freelancers from:
    Anywhere

    You are still able to submit a proposal for this job.

    The client prefers freelancers from
    a different location.

    You're still able to submit a proposal for this job, regardless of your location.
  • Start: Immediately
  • Hourly Rate: More than $50 / hr
  • Hrs/wk: Not Sure | Duration: 3-4 weeks
  • Work View™ Payment Protection
  • U.S. freelancers must have W9
Sign in to view client's details

2000 watt 300KHz AC output, 3 phase input. Starting from my hand drawn schematic, please buy parts and hand build 1st unit. I have the output core. Other magnetics should be available. Design attempts to use digi-key parts primarily.

1st goal is to build this circuit in any reasonable fashion; air cooling fets.

2nd goal is to veryify that this design works. Are you able to test this in your lab? Testing would require 500V to 750V high power source. Load could be light bulb bank. Keeping this hand built high power circuit from burning up would be difficult.

Basic topology is: on/off gate, followed by straight boost (up to 1200 volts) followed by pure bridge driving big toroid core. Issues to evaluate: efficiency, on/off function, gate drive function. Unusual features: small filter caps for low inrush, sine wave gate drive for switcher output, wide range of output load.

Sign in or Register to see more

Desired Skills
Electrical Engineering
Job ID: 30790237
Proposals
Hourly Rate: Avg $ | High $ | Low $ — Show Pricing
  • Submit Date (Latest)

 Russia  |  
Engitronic is a high-tech engineering service company specializing in the development of embedded software and hardware projects Please, visit...
3
  |  
 0.0   |  Private   |  1 Jobs
Bid ID: 31045382  |  Submitted: Jun 6, 2012 10:10 ET 
Proposal SEALED

 Serbia  |  
There are no big problems there are only solutions which are not good enough. Higher chalenge means bigger pleasure to work on it. I will not take...
9
  |  
 4.8   |  Private   |  15 Jobs
Bid ID: 30921775  |  Submitted: May 31, 2012 18:46 ET 
Proposal SEALED

 United States  |  
I am John Nicosia, owner of Honey Bear Electronics, LLC (HBE). I truly enjoy the work that I do, taking ideas and generating a design, or a...
1
  |  
 0.0   |  $0 Earnings   |  0 Jobs
Bid ID: 30912585  |  Submitted: May 31, 2012 11:33 ET 
Proposal SEALED

 United States
Zreyas Technology is a network consortium of senior professors, seasoned Industry R&D professionals and PhD students working in the cutting edge...
2
  |  
 0.0   |  Private   |  0 Jobs
Bid ID: 30890852  |  Submitted: May 30, 2012 14:40 ET 
Proposal SEALED

 Bulgaria  |  
Since 1995 dealing with complete, custom specific solutions in electronics - from the idea to the ready for the market product .
2
  |  
 0.0   |  $2,680 Earnings   |  1 Jobs
Bid ID: 30812869  |  Submitted: May 27, 2012 08:01 ET 
Proposal SEALED

 Italy
Independent consultant in mechatronics and electronics. Specialized in the development of innovative and high performance products from the...
1
  |  
 0.0   |  Private   |  0 Jobs
Bid ID: 30811069  |  Submitted: May 27, 2012 04:13 ET 
Proposal SEALED
Sign in to Elance and start working on jobs today.
Sign in to view more of the job details and submit a proposal. Once registered, you'll have access to thousands of jobs online or through email.
Are you ready to post a job like this one?
Post a Similar Job »