4 Sep
2009
4 Sep
'09
6:25 p.m.
On 4 Sep 2009 at 19:16, Brian Lanning wrote:
That marketing horsepower rating is technically, under
a very specific
scenario, correct.... believe it or not. But it's a useless number.
IIRC, it comes from the power spike that happens right when you grab
the shaft of the motor. So essentially, it's a useless power rating.
I might be off on the description. I'm not an EE and I got a
frightfully low grade in physics.
While we're on the subject--is there a different rating system for
commercial applications? Most consumer upright vacuums boast 10-12
amp motors, whatever that means. After experiencing the dubious joy
of owning several consumer vacs in about as many years, I bought a
commercial vacuum, rated for hotel use. This by comparison, has a 6
amp motor, yet it does a job that's at least as good as my last 10
amp consumer model. The motors don't seem to be very different in
size, though the commercial one is ball-bearing and metal-housed and
has a brand that I recognize.
This reminds me of the old IHF "Music Power" ratings for audio gear
of many years past. Pure stuff and nonsense.
--Chuck