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Waterloo Region Connected  /  Waterloo Region Works  /  Transportation and Infrastructure v  /  ION - Waterloo Region's Light Rail Transit


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ION - Waterloo Region's Light Rail Transit
timc Offline
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03-13-2017, 11:02 AM
(03-11-2017, 04:31 PM)Canard Wrote: AC motors like this can be very accurately controlled by their drive (called a Variable Frequency Drive, or VFD); it's what makes the high-pitched quiet "squeal" or "whine" on newer trains as they accelerate and decelerate.  Some really nerdy folks like myself even get a kick out of the different noises that these types of systems make - my favourite being the 90, 120, 180, 240, 360 Hz startup tones of the Montreal metro trains...  Big Grin

I spent one summer in Montreal 20 years ago, and I still remember that sound. :-)
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RE: ION - Waterloo Region's Light Rail Transit - by timc - 03-13-2017, 11:02 AM
[No subject] - by Spokes - 08-28-2014, 04:16 PM

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