Latest threads in ⏚ Electrical Engineeringshow only best voted threads
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Protection for a permanent magnet dc motor
Hi, I'm after suggestions for protecting a DC permanent magnet motor. The motor is used to drive a hydraulic swash plate pump for typically 30 min -1 hour at a time. Mostly the motor is on light load...
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17 years ago
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Tesla's original patent application for the AC Induction Motor Aug 5, 1890
I just came across this and find it rather amazing. It is at: http://www.keelynet.com/tesla/00433701.pdf
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17 years ago
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Memory backup capicitor as timing element
I am looking for a 15 minute timed drop out with minimum parts count. I was thinking about one of those half farad or so "super caps" they use for mermory backup. If the load was 2k ohms or so...
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17 years ago
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Problems about Electrical Circuit Theory
1.) Derive work formula for L (inductor) and C (Capacitor) that is, WL and WC..... 2.) What is a natural response and a force response? 3.) What is a time constant (big letter TAU, in greek letter)....
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17 years ago
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What is the demand load for these ranges?
Ranges of unequal rating supplied by 3-phase 208Y/120 volt circuit. Used for instructional purpose or for multiple dwelling units. What is the demand load for the service or a feeder? 6 ranges at 3 KW...
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17 years ago
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temperature chips ??
Hi, i know several companies make a temperature sensing chip. can anyone point me. thks bg
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17 years ago
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Roadside cabinets
Does anyone know if British Telecom, Electrical companies or British Telecom sell on any second hand roadside cabinets, I am after 1 or 2 for electrical insallation at a fishery in South Wales
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17 years ago
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lamp inverters
I have found some "old" flourescent lamp inverter. HV output is cca 800V. First thing: I have made small capacitor bank in which i want to store this HV output voltage. So, instead to go to lamp, the...
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17 years ago
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Professional Engineer Exam Review Questions
Hi I am studying for the E&CE PE Electrical Exam using the Kaplan Practice Exam book by Edward Graham. My complaint is that some of the questions are tricky and unique and not common examples and that...
3
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17 years ago
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Dynamic engineering company in South Africa
We are a dynamic engineering company, offering: * Electrical engineering services, with major experience in marine, mining and industrial electrical distribution systems, instrumentation and related...
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17 years ago
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6mm Core getting hot
Hi, The 6MM core running from may shower to fuse box is getting hot and smelling pretty bad when I shower. The cable has been installed since I moved in over 10 years ago. I replaced the shower which...
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17 years ago
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Broadband power line
Is this going to work? My sister lives in a remote area. I jokingly tell people that they haven't had electricity too long. I truly don't think she will ever have anything other than dialup. surfing...
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17 years ago
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Rectifier Getting Too Hot
Hello Friends, I have a simple question for you. Im using a 12volt rectifier to convert A/C power from my 100watt AC transformer, to 12volt DC. The problem Im having is, the rectifier im using is...
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17 years ago
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Method and circuit to reduce Jitter?
Hi, I am an electrical engineering student and I am interested in circuit design. Unfortunety I am not so familiar with analog design. Therefore I want to place my question here in the newsgroup: Is...
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17 years ago
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future power grids able to direct when fridges go into their "off" cycle early?
This is an idea I came across a few years ago. With the recent melbourne blackout and the issue of suddenly needing power but not being able to fulfil it from backup generators etc, this could be...
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17 years ago
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