|
|
Post by mrfatso on Feb 3, 2016 12:09:16 GMT
A couple Of years back the E.U. enforced regulations that set a maximum power rating for new Vacuum cleaners, many older models had larger motors than are allowed for retail here now.
|
|
|
|
Post by GTCGreg on Feb 3, 2016 13:49:16 GMT
A couple Of years back the E.U. enforced regulations that set a maximum power rating for new Vacuum cleaners, many older models had larger motors than are allowed for retail here now. If only they would also enforce regulations on how much other products suck. |
|
|
|
Post by the light works on Feb 3, 2016 15:22:22 GMT
A couple Of years back the E.U. enforced regulations that set a maximum power rating for new Vacuum cleaners, many older models had larger motors than are allowed for retail here now. the bad thing is the Wind Tunnel vacuum may have no more suction than my mother's OLD vacuum. they just used a motor that draws more power because they advertise them by how much current the motor draws. this is essentially like advertising a car by how many gallons per minute the motor burns. |
|
|
|
Post by The Urban Mythbuster on Feb 3, 2016 15:27:34 GMT
A couple Of years back the E.U. enforced regulations that set a maximum power rating for new Vacuum cleaners, many older models had larger motors than are allowed for retail here now. the bad thing is the Wind Tunnel vacuum may have no more suction than my mother's OLD vacuum. they just used a motor that draws more power because they advertise them by how much current the motor draws. this is essentially like advertising a car by how many gallons per minute the motor burns. So, rather than actually admit to the strength of the vacuum (psi), the manufacturer tells you how "powerful" it is via its electric draw. Cuz more power. Arrhh arrhh arrhh. |
|
|
|
Post by the light works on Feb 3, 2016 15:33:28 GMT
the bad thing is the Wind Tunnel vacuum may have no more suction than my mother's OLD vacuum. they just used a motor that draws more power because they advertise them by how much current the motor draws. this is essentially like advertising a car by how many gallons per minute the motor burns. So, rather than actually admit to the strength of the vacuum (psi), the manufacturer tells you how "powerful" it is via its electric draw. Cuz more power. Arrhh arrhh arrhh.  |
|
|
|
Post by GTCGreg on Feb 3, 2016 15:46:12 GMT
I think my shop vac had a sticker on it when I bought it that said it was 3.5 Peak Horsepower. How do you get "peak" horsepower from a shop vac? Shove a screwdriver in the rotor? And how do you get a 3.5 horsepower motor to operate from a 120Volt, 15 Amp outlet? I'll have to ask a marketing type person the next time I see one.
|
|
|
|
Post by the light works on Feb 3, 2016 15:55:48 GMT
I think my shop vac had a sticker on it when I bought it that said it was 3.5 Peak Horsepower. How do you get "peak" horsepower from a shop vac? Shove a screwdriver in the rotor? And how do you get a 3.5 horsepower motor to operate from a 120Volt, 15 Amp outlet? I'll have to ask a marketing type person the next time I see one. probably measure the inrush current, and treat it like full load current. |
|
|
|
Post by GTCGreg on Feb 3, 2016 16:02:24 GMT
I think my shop vac had a sticker on it when I bought it that said it was 3.5 Peak Horsepower. How do you get "peak" horsepower from a shop vac? Shove a screwdriver in the rotor? And how do you get a 3.5 horsepower motor to operate from a 120Volt, 15 Amp outlet? I'll have to ask a marketing type person the next time I see one. probably measure the inrush current, and treat it like full load current. Yep, that will make it pick up dirt. |
|
|
|
Post by silverdragon on Feb 4, 2016 9:03:27 GMT
A couple Of years back the E.U. enforced regulations that set a maximum power rating for new Vacuum cleaners, many older models had larger motors than are allowed for retail here now. If only they would also enforce regulations on how much other products suck. Ironically, that was the joke when they introduced the idea. |
|
|
|
Post by silverdragon on Feb 4, 2016 9:12:32 GMT
I think my shop vac had a sticker on it when I bought it that said it was 3.5 Peak Horsepower. How do you get "peak" horsepower from a shop vac? Shove a screwdriver in the rotor? And how do you get a 3.5 horsepower motor to operate from a 120Volt, 15 Amp outlet? I'll have to ask a marketing type person the next time I see one. Maximum power when its drawing on a hose blocked by a stray curtain?... I had three vacs with differing power settings. My shop vac would be rated at 4,000 watt in equivalent power, they now limit it to 2000 or below. I just used better fan blades to get the maximum power, with a variable speed controller taken from the electric drill I cannibalised to get the power control, that gives me an on/off on the handle of the hose rather than the body of the machine. Yep that means I have control wires running down the hose, three guesses not needed what keeps them in place?.. It runs at a lower setting on dust extraction when attached to the chop saw, but it can switch over to a higher setting to dust off the subject. I also got the extra hose on the exhaust to allow me a "blow" to dust off large sanded areas. |
|
|
|
Post by the light works on Feb 4, 2016 14:42:20 GMT
that or you could rewire it to run on 240V and get the 3.5 HP out of it.
|
|
|
|
Post by The Urban Mythbuster on Feb 4, 2016 14:52:21 GMT
I think my shop vac had a sticker on it when I bought it that said it was 3.5 Peak Horsepower. How do you get "peak" horsepower from a shop vac? Shove a screwdriver in the rotor? And how do you get a 3.5 horsepower motor to operate from a 120Volt, 15 Amp outlet? I'll have to ask a marketing type person the next time I see one. Maximum power when its drawing on a hose blocked by a stray curtain?... I had three vacs with differing power settings. My shop vac would be rated at 4,000 watt in equivalent power, they now limit it to 2000 or below. I just used better fan blades to get the maximum power, with a variable speed controller taken from the electric drill I cannibalised to get the power control, that gives me an on/off on the handle of the hose rather than the body of the machine. Yep that means I have control wires running down the hose, three guesses not needed what keeps them in place?.. It runs at a lower setting on dust extraction when attached to the chop saw, but it can switch over to a higher setting to dust off the subject. I also got the extra hose on the exhaust to allow me a "blow" to dust off large sanded areas. Frankenvacuum! It's alive! And it really sucks...  |
|
|
|
Post by GTCGreg on Feb 4, 2016 15:03:26 GMT
I think my shop vac had a sticker on it when I bought it that said it was 3.5 Peak Horsepower. How do you get "peak" horsepower from a shop vac? Shove a screwdriver in the rotor? And how do you get a 3.5 horsepower motor to operate from a 120Volt, 15 Amp outlet? I'll have to ask a marketing type person the next time I see one. Maximum power when its drawing on a hose blocked by a stray curtain?... I had three vacs with differing power settings. My shop vac would be rated at 4,000 watt in equivalent power, they now limit it to 2000 or below. I just used better fan blades to get the maximum power, with a variable speed controller taken from the electric drill I cannibalised to get the power control, that gives me an on/off on the handle of the hose rather than the body of the machine. Yep that means I have control wires running down the hose, three guesses not needed what keeps them in place?.. It runs at a lower setting on dust extraction when attached to the chop saw, but it can switch over to a higher setting to dust off the subject. I also got the extra hose on the exhaust to allow me a "blow" to dust off large sanded areas. Sounds like a great vactraption. Just one point, maximum power would be when the most air is moving, not when it's blocked. When the hose is blocked, the motor would be drawing it's minimum amount of power. |
|
|
|
Post by silverdragon on Feb 5, 2016 7:21:52 GMT
Yes I suppose less power consumed, I was thinking more of the more suction when partially blocked making the suck more powerful... less air moving but greater pressure differential?..
|
|
|
|
Post by GTCGreg on Feb 5, 2016 8:47:54 GMT
Yes I suppose less power consumed, I was thinking more of the more suction when partially blocked making the suck more powerful... less air moving but greater pressure differential?.. I just know from the blowers we use in ambulances. When they are sitting in free air, they draw 22 Amps (at 12 Volts) but when they are mounted in their enclosure with some air restriction on their inputs, they only draw 16 Amps. |
|
|
|
Post by silverdragon on Feb 5, 2016 9:04:17 GMT
Yes I suppose less power consumed, I was thinking more of the more suction when partially blocked making the suck more powerful... less air moving but greater pressure differential?.. I just know from the blowers we use in ambulances. When they are sitting in free air, they draw 22 Amps (at 12 Volts) but when they are mounted in their enclosure with some air restriction on their inputs, they only draw 16 Amps. I think we may have to ask someone on this, I have never metered out my fans as to what they use whilst in use?... |
|
|
|
Post by the light works on Feb 5, 2016 15:18:15 GMT
Yes I suppose less power consumed, I was thinking more of the more suction when partially blocked making the suck more powerful... less air moving but greater pressure differential?.. I just know from the blowers we use in ambulances. When they are sitting in free air, they draw 22 Amps (at 12 Volts) but when they are mounted in their enclosure with some air restriction on their inputs, they only draw 16 Amps. I had to think twice to correlate that with what I know about motors. a motor draws the least amps under the least load. so with the restricted air return, it draws a partial vacuum in the plenum chamber, and has less air resistance around the blower. and the same would apply with a vacuum, which explains why the pitch of the vacuum rises when you block the suction. |
|
|
|
Post by GTCGreg on Feb 5, 2016 16:51:59 GMT
I just know from the blowers we use in ambulances. When they are sitting in free air, they draw 22 Amps (at 12 Volts) but when they are mounted in their enclosure with some air restriction on their inputs, they only draw 16 Amps. I had to think twice to correlate that with what I know about motors. a motor draws the least amps under the least load. so with the restricted air return, it draws a partial vacuum in the plenum chamber, and has less air resistance around the blower. and the same would apply with a vacuum, which explains why the pitch of the vacuum rises when you block the suction. What's really a little bit strange, is the same thing happens if you block the discharge of a blower. What is going on there, is even though the static pressure of the air increases, since the air cannot get out of the housing, it just starts spinning around with the impeller. This reduces the air friction the impeller sees. This is only true of blowers. If you block the discharge of a fan, it typically increases the loading on the motor. |
|
|
|
Post by the light works on Feb 5, 2016 17:00:55 GMT
to get back to the topic at hand.
and you'll note they didn't cheap out with a yugo.
|
|
|
|
Post by GTCGreg on Feb 5, 2016 17:41:21 GMT
to get back to the topic at hand. and you'll note they didn't cheap out with a yugo. And no explosives required. |
|
