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6-7 inch forklift motor ? Is that a typo ?

 

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ok. You can ask this guy what the size of the motor is CR-114330 Motor 24 Volt Crown Forklift Used Parts | eBay

 

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I googled etek, the only stuff that popped up looked like Motenergy. Either way, I have two ME1004 motors in similar implements, one in a Husqvarna riding mower. The main thing about it is that it's designed to put out some 3000RPM at 48V, it would be perfect. It has a PM rotor, so it is indeed quite a bit lighter than a forklift motor, but the weight can easily be added if necessary.

 

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are you planning to obtain a free forklift motor ? Unless you can get one locally for the price of scrap, I don't see how ME1004 would be much different. Consider the fact that shipping a forklift motor will be a pretty penny, where a permanent magnet motor would cost just $30-40 to ship.

 

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This motor has a PM stator. Palmtree, pull off the red/orange cover(if that's what it is) on the input for the transmission. There could be a opening to accept a splined or keyed shaft. This is what you would have to fit the motor shaft into for a direct drive.

You are correct! It's a brushed motor, so definitely a PM stator. I was just servicing another Motenergy motor (ME0201014201) which is a BLDC, and it had a PM rotor so I confused the two.

 

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Part #1200569
closet thing to a model number on the motor

Yeah, that looks like the floor burnisher part number. Based on the pics it seems to be a Motenergy motor, must be OEMed.

 

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Any opinions on this motor? Drive motor from 6000lb crown pallet jack. I'd like to run it at 48v but I'm not sure it's enough power.

1.5kW at 24V is 62.5A. If you double the voltage, you will get 3kW continuous - seems like still quite far from your target.

 

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Ya that's what I was thinking. Just seems crazy that my little tractor would require the same size motor as a road going car.

I don't know if it requires it. You probably would get away with slight downrating, but how much does a "road going car" take ? I googled just now a Toyota Corolla - 139 to 169 HP, so over 10 times more than what you're looking at.

 

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Here is the name plate from my forklift motor (still on the forklift ) :

It doesn't say what amperage it's rated for, but the system is fused at 400A, so I imagine at least 300A is expected. It is currently on a 36V battery, so 11kW or so. Then from that you can calculate the power if you were to bump up the voltage in a conversion like people do...

Forklift is 5800lb with 4000lb lift capacity.

 

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How big is that motor?

I want to say it's 10-11", but I can't get to it at the moment to measure. NOT SMALL for sure. Anyway, my point was that those big lift motors can deliver quite a bit of power under increased voltages given their current ratings.

 

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No, that motor is in a working forklift which I need as a forklift But I do have another motor to show off, I will make a picture of it in a few

 

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That's a Peerless-Winsmith I pulled out of a boom lift. Extremely heavy, and note it's only 7HP while being rated for intermittent duty.

 

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I have this one available too but it's almost 11" in diameter. Any way to know what kind of juice I could run through this?

Some other folks may have a better answer to that, but personally I wouldn't hesitate to ramp it to 200-300A, especially if you add/use a temp sensor and cut back on overheating.

 

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Are you not concerned about the fact that it is rated for intermittent duty?

I was showing you that motor just for the scale reference. Series wound motors just happen to be big and heavy while delivering little power compared to PM motors whether AC or DC. This specific motor I replaced with AC-23 in that machine, I don't have any upcoming projects for it.

 

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Machine kept burning the controller, and I wasn't sure if there was an issue with the motor or my style of use was just outside of its capabilities. So I after I replaced the controller twice, I decided to decouple the drive into a separate system with a much more powerful motor. So original system had two motors - one drive motor, shown above, and another for hydraulic pump, while a single controller flipped between the two using contactors. Now the original controller only handles the pump motor, while the drive is on independent motor and controller.

 

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This is mine during early testing:

It works, but not the most efficient setup due to hydrostatic transmission and the belt/pulleys. Eventually I want to shove a Chinese transaxle with a motor onto it, and keep the front motor for running the deck only. No motor controller used - motor runs straight from the battery, which reduces the cost of the conversion.

 

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One of the simplest ways of working out energy use is to monitor gas consumption, if that is an option still.

Using which efficiency numbers ?

 

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That floor polisher motor looks like a Motenergy motor. I think it's the best option.