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Old 11-18-2019, 11:14 AM
Juiced Juiced is offline
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Default 1 1/8" High performance centrifugal clutch

Afternoon all.

I am looking for a 1 1/8" bore High performance centrifugal clutch for a electric
project. Custom is fine if sturdy enough. The motor is rated around 80HP

Crazy Ed
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Old 11-18-2019, 11:29 AM
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mounting a centrifugal clutch to an electric motor is
a terrible idea!
and most of all 100% pointless!

'sid
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Old 11-18-2019, 11:42 AM
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Depends on the application.

I still want one.

Ed
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Old 11-18-2019, 05:31 PM
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Quote:
Originally Posted by itsid View Post
mounting a centrifugal clutch to an electric motor is a terrible idea!
and most of all 100% pointless!

'sid
Dang. I'll say it again; it's pretty bad when a moderator weighs in with a few subtle barbs or mudslingin', if you prefer. First reply, too.
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Old 11-18-2019, 05:39 PM
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Quote:
Originally Posted by Hellion View Post
Dang. I'll say it again; it's pretty bad when a moderator weighs in with a few subtle barbs or mudslingin', if you like. First reply too.
Ha ha, never thought you and I would agree.

A sliver of knowledge and a title that says moderator, and you to can too can belittle others with impunity.
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Old 11-18-2019, 11:54 AM
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the only logical reason for a clutch on an electric motor would be.... WHEELIES!
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Old 11-18-2019, 12:53 PM
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NonononoNONONONO! NO!
Electric motors generate MAXIMUM torque right off the bat! So no, a clutch will not make an electric kart wheelie.
And anyway, you'd lose at least 1800 RPM of power when you could be GOING! Plus the clutch will actually dampen acceleration due to the extra moving parts and the slip. Plus you have to maintain it.
On top of it, I don't know of ANY 1 1/8" bore clutches of torque converters.

80 HP!!!!???
I don't think you have a DC motor, much less a motor suitable for a kart.
"Depends on the application."???
Seriously? You want advice from us and won't tell us WHAT you are doing??
Come on, man. We need tons and tons of details, and most of all, PICS!
Sorry if this sounds harsh, but this thread is going nowhere but down without details.
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Old 11-18-2019, 01:32 PM
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All I wanted was a manufacturer of clutches.... Photos will come after I try it out.

What? Never drag raced a cart before?

It is a 80 HP AC motor.
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Old 11-18-2019, 01:45 PM
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Well then, if it's AC, you have two choices.
1. - Have a ridiculously long extension cable trailing you
2. - Have a ton of batteries hooked up to an inverter, not very weight efficient.

I have done "self drag racing" with my Briggs flathead kart, but that is in no way similar to an electric motor.

Can we at least see some pics of the motor? I feel like it's a massive industrial motor, designed to spin at low RPM, or possibly on a low duty cycle.

As itsid said above, a clutch on an electric motor is quite pointless, not to mention extremely inefficient.

Let me put it this way: You pull up to the christmas trees with a directly driven electric kart, the lights tick down, and you launch. There is minimal moving parts, and the motor does not need to spool up. = Faster launch times.
But with a clutch, the motor has to spool up to reach engaging, so that means lost time, not to mention the small amount of slip in the clutch, which further kills the ET.
Electric motors produce maximum torque INSTANTLY, as soon as you touch the "gas pedal". That is equivalent to a hard clutch dump.
If I had money, I'd be willing to bet that a properly geared direct drive electric kart would outperform it's own clutched setup at the dragstrip.

However, I can't stop you from going down the rabbit hole, so here's a 1 1/8" bore Comet 94C Duster torque converter driver pulley.
https://6x6parts.com/4_cycle_engine_...1_8-_bore.html
$265!!!!!
And you still need a driven pulley and belt! Not to mention a way to mount it!
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Old 11-18-2019, 02:37 PM
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Quote:
Originally Posted by JTSpeedDemon View Post
Well then, if it's AC, you have two choices.
1. - Have a ridiculously long extension cable trailing you
2. - Have a ton of batteries hooked up to an inverter, not very weight efficient.

I have done "self drag racing" with my Briggs flathead kart, but that is in no way similar to an electric motor.

Can we at least see some pics of the motor? I feel like it's a massive industrial motor, designed to spin at low RPM, or possibly on a low duty cycle.

As itsid said above, a clutch on an electric motor is quite pointless, not to mention extremely inefficient.

Let me put it this way: You pull up to the christmas trees with a directly driven electric kart, the lights tick down, and you launch. There is minimal moving parts, and the motor does not need to spool up. = Faster launch times.
But with a clutch, the motor has to spool up to reach engaging, so that means lost time, not to mention the small amount of slip in the clutch, which further kills the ET.
Electric motors produce maximum torque INSTANTLY, as soon as you touch the "gas pedal". That is equivalent to a hard clutch dump.
If I had money, I'd be willing to bet that a properly geared direct drive electric kart would outperform it's own clutched setup at the dragstrip.

However, I can't stop you from going down the rabbit hole, so here's a 1 1/8" bore Comet 94C Duster torque converter driver pulley.
https://6x6parts.com/4_cycle_engine_...1_8-_bore.html
$265!!!!!
And you still need a driven pulley and belt! Not to mention a way to mount it!
AC motors work just fine. Specifically 3 phase motor inverters are fine efficiency wise, and controlling isn't too hard if you know what your doing. All modern electric cars use AC drive motors. If it's 80hp, it's likely an EV motor which would work fine for a Kart, if not ludicrous.

So no, you don't need a large extension cord. And more voltage doesn't equal more weight. Use more smaller batteries.

And not just that...it's 80hp. Likely that motor puts out something like 120ft-lb of torque. You can direct drive that motor if you could connect it easily to an axle.
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Old 11-18-2019, 03:29 PM
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Quote:
Originally Posted by Budget GoKart View Post
the only logical reason for a clutch on an electric motor would be.... WHEELIES!
Quote:
Originally Posted by Tpdingo View Post
AC motors work just fine. Specifically 3 phase motor inverters are fine efficiency wise, and controlling isn't too hard if you know what your doing. All modern electric cars use AC drive motors. If it's 80hp, it's likely an EV motor which would work fine for a Kart, if not ludicrous.

So no, you don't need a large extension cord. And more voltage doesn't equal more weight. Use more smaller batteries.

And not just that...it's 80hp. Likely that motor puts out something like 120ft-lb of torque. You can direct drive that motor if you could connect it easily to an axle.
You are correct.
We have it currently as a direct drive. We want to "hit it" quicker off the line so a bit of motor speed with an AC motor provides that function.

Ed
Racing for over 30 years...
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Old 11-18-2019, 01:59 PM
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For Pete's sake,
Is very likely the guy asking for a centrifugal clutch wants a centrifugal clutch.

Get in touch with Shannon Halbert. Link below. This guy actually knows about clutches. Here you get baffling with BS and kids that don't know they don't know. Not just this thread either, lol.

http://gofasthp.com/

Info@gofasthp.com

Tell em I sent ya.
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Old 11-18-2019, 02:27 PM
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Thanks Randy and will do! !
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Old 11-18-2019, 02:42 PM
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I put a 40 series clutch on a 1.5HP AC motor. Needed to get the 60HP motor up to speed before energizing. Phase converter so no load on the shaft.

Jim in Florida
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Old 11-18-2019, 04:14 PM
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........Or you could run a chain to a jackshaft that has a clutch on it...........

But of course, I don't know what I'm talking about right?, so don't do that, every idea that I pound out on the keyboard is absolute trash, right?
Mmmhmm, thought so.
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Old 11-18-2019, 04:38 PM
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Quote:
Originally Posted by JTSpeedDemon View Post
........Or you could run a chain to a jackshaft that has a clutch on it...........

But of course, I don't know what I'm talking about right?, so don't do that, every idea that I pound out on the keyboard is absolute trash, right?
Mmmhmm, thought so.
Your intentions are honorable, but all I needed at his time was a clutch manufacturer.

My other EV... DC motor, no clutch (being DC) 117V.

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Old 11-18-2019, 05:01 PM
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Quote:
Originally Posted by JTSpeedDemon View Post
........Or you could run a chain to a jackshaft that has a clutch on it...........

But of course, I don't know what I'm talking about right?, so don't do that, every idea that I pound out on the keyboard is absolute trash, right?
Mmmhmm, thought so.
Get over yourself Boy Wonder.

I have experience with electric motors. MG sets, conveyors (like thousands of feet long) rock crushers, electric cranes,(drag line cranes). I have fond (horrific) memories of a converted diesel > electric, 300HP 3 phase 4000+ volt beast. Way before PLC control. Solenoids, ladder logic and DC motors.

The torque is instant. For example an overloaded conveyor may pull an overload if you let it cool off, the motor the starter, heaters. Things I'm going to guess you don't know anything about.

However speed is not instantaneous. A big azz squirrel cage induction motor may take seconds to get up to speed, especially under a load.

I actually support you. I would guess you have a triple digit IQ. Kudos.
Heck, it is a sort of free country. The internet is fair game for all. Doesn't change the fact that people that don't know should keep their juicy face shut.
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Old 11-18-2019, 07:16 PM
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Quote:
Originally Posted by Randy H View Post
Get over yourself Boy Wonder.

I have experience with electric motors. MG sets, conveyors (like thousands of feet long) rock crushers, electric cranes,(drag line cranes). I have fond (horrific) memories of a converted diesel > electric, 300HP 3 phase 4000+ volt beast. Way before PLC control. Solenoids, ladder logic and DC motors.

The torque is instant. For example an overloaded conveyor may pull an overload if you let it cool off, the motor the starter, heaters. Things I'm going to guess you don't know anything about.

However speed is not instantaneous. A big azz squirrel cage induction motor may take seconds to get up to speed, especially under a load.

I actually support you. I would guess you have a triple digit IQ. Kudos.
Heck, it is a sort of free country. The internet is fair game for all. Doesn't change the fact that people that don't know should keep their juicy face shut.

But it's not a squirrel cage. It's 3 phase AC, and likely vector control drive(or variable frequency drive). The motor isn't waiting to get up to speed like a normal 60hz induction motor. The controller is synced to the rotor at almost every speed so you get the speed very quickly as long as the amps can supply it.
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Old 11-18-2019, 08:03 PM
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Quote:
Originally Posted by Tpdingo View Post
But it's not a squirrel cage. It's 3 phase AC, and likely vector control drive(or variable frequency drive). The motor isn't waiting to get up to speed like a normal 60hz induction motor. The controller is synced to the rotor at almost every speed so you get the speed very quickly as long as the amps can supply it.
No offense, I suggest you do some research. I've been dealing with 3 phase AC squirrel cage induction motors since about 1984. Minus the last few years, because a drugged up driver ran me off the road. Poor, poor pitiful me. Lol.

You can use VFD control on a regular old 3 phase, squirrel cage, induction, AC motor. I know this, because I've done it.

Apologies to those who know, many redundancies in my previous sentence. Haha, I know I'm wasting my mad Swipe skills.
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Old 03-15-2020, 05:32 AM
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Here is the latest pass (and Burnout) a few days ago without a clutch.
60 foot is still poo poo. All I need is about 500 RPM on the start and she should hit even harder... Fun stuff



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