Only to folks that have never used a machine that has been converted to a VFD. Variable speed without changing gears or using a variable sheave system. Soft starts/stops and reversals. No parasitic power use like a rotary. No noise like a rotary. Cheaper unless you have lots of machines to run. The 4 VFDs in my shop machines cost me on average about $125 each.
The concern about insulation damage on a motor not rated for inverter use is way overblown. Sure, the possibility exists, but I have never seen it happen despite having been involved with several VFD installs.
I have 4 VFDs running motors in my shop. The oldest motor is from the 30s and has been used a couple times a week for 6+ years with no problems.
A friend has an older 40HP motor on his sawmill running off a 3 phase genset. Put an inverter on that and set up a soft start to not bog the genset down when starting the blade. That has been running for 10 years now with no trouble.
Factory I used to work at added VFDs to several of the exhaust fans used to keep the air clear in the fab shop. Did that so when things were slow or cold outside they could slow down the ventilation or speed it up in summer or things were real busy. Those were up to 15HP and again never had an insulation problem despite running 24 hours by 5-6 days per week. We did have one of those have a bearing go out after a couple years on the VFD. There was some speculation that it may have been related to VFD use, but was never proven. Replaced the bearings and it was still going when I retired.
Upload one or more videos to your post. Photo and video filesizes should be less than 8MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
