The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
Subject: Re: AC Motor Soft Starter
Date: Fri, 27 Dec 2002 13:07:07 -0500
Organization: Posted via Supernews, http://www.supernews.com
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
There are several commercial units available. Do a search for 'reduced
voltage motor starter' or 'soft start' and you should come up with a bunch.
The soft starter in general reduces the voltage to the load during run-up.
This is often done by a current sensing relay which switches in a limiting
resistor while the current is above threshold. When the load comes up to
speed, current draw is reduced and relay cuts out providing full voltage to
the motor. More sophisticated controls have phase control to reduce the
voltage and sense what is happening to the load for safety.
For valid response address, remove the '1' following oppie
"Rudolf Usselmann" wrote in message
| Hi !
| I'm looking for a single phase 220V Soft Starter for
| a 3.5HP Electrical Motor.
| Anybody know where to get these things from ?
| (Either fully build or as a kit).
| Many Thanks !
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup