So, I haven't posted In a while because my electric boat project stalled and I have been working like a mule but .. . .
The motor recently blew on my farm truck and since I already had a drive motor taking up space I've decided to do a conversion. I'll post the build in a different forum.
This is the motor I'm using, It's a bit on the big side but I already have it and it's light compared to the cast iron engine I pulled out - and It will fit.the space just fine.
This motor has a cooling fan which has it's own drive. I'm wondering if anyone is familiar with this and could give me any pointers on how it's powered. It has a three prong plug and I'm unclear how it should be hooked up. Not sure if one is neutral and the other two are low/high I'm planning on spinning the fan and poking the plug with a volt meter to see what that shows but I'd love a little guidance.
also there is what appears to be a signal wire on the other end of the motor if anyone has a clue what that is for.
Some fans have a 3 wire interface: ground, power positive and tachometer signal. You can probably isolate the tach wire by trying to spin the fan with compressed air and measuring frequency on the pair of wires. Although if the tachometer sensor is an active kind like Hall, the fan may need to be powered too
The other connector is likely going to some thermistors for temperature monitoring. You should be able to isolate those by checking the resistance, which should go into several kohms. It is also possible that there is another tach for the motor itself.
Is it a Series or a Sepex motor? case length and diameter? Weight? Some interior shots of the windings, commutator, and brushes would be helpful to evaluate the motor.
Also, pictures, type(s), and dimensions of the output shaft(s) would be good info to have.
Since the 11 kW rating is at 48 volts I assume that the plan would be to run it at higher voltage, like all the rest of the "forklift" (or other industrial brushed series DC) motor conversions. It still won't handle the sustained power that the original engine could provide, of course. Average power use of even just 11 kW might be adequate for the truck at moderate speed.
Again, it doesn't matter what voltage you run at, the magic smoke starts coming out after 15 sec at 11kW according to the nameplate.
11kW is your 0-30mph sprint with it floored. Getting a TRUCK to 50 on 11kW is a stretch, don't you think? And you can only run it there (say you start off on a hill) for 15sec.
I would not push that motor's output without a thermocouple monitoring winding temperature. I'd also add a cooling jacket to it.
It's not that simple. The rating is probably based on heating due to current; the same current at higher speed (which requires higher voltage) may result in acceptable heating.
11kW is your 0-30mph sprint with it floored. Getting a TRUCK to 50 on 11kW is a stretch, don't you think? And you can only run it there (say you start off on a hill) for 15sec.
No, with higher voltage the power for that sprint will be higher... as it certainly needs to be for performance that most of us would consider acceptable.
I have no idea what the truck is (maybe it's a little old Ranger), but yes, 50 MPH on 11 kW seems unlikely.
The 11 kW rating on the placard (at 48 V, and a fixed and unknown speed) is for 15 minutes, not 15 seconds.
Power is the same no matter the combination of voltage and current, but the limitation of the motor isn't power at all - it's the heat generated internally and the ability of the motor to dissipate it. And that certainly does depend on current and on rotational speed.
But if the point is to convince theonetruerat that an antiquated motor intended for 48 V operation is not suitable for a modern vehicle, I'll agree with that. On the same basis, the entire NetGain product line - other than the HyPer 9 (which they don't manufacture) is also unsuitable. None can sustain significantly more power than the random motor discussed in this thread.
Sorry, I guess I stuck a picture of the wrong motor badge - it's 9 KW at 1 hour. It's going in a mid 80s Toyota that is super light (most of the truck is gone) the truck hasn't gone over 25 MPH for years - hasn't been out of low range for years. It, won't be going more than 10 miles at a stretch either.
The motor is about 11" diameter and about 16" long.
I'm mostly interested in sussing out the cooling fan. I was hoping someone had dealt with a similar motor before and could give me the skinny. I'll put a volt meter on it when I get back to my shop and spin it with an air gun. See what that tells me.
I'm mostly interested in sussing out the cooling fan. I was hoping someone had dealt with a similar motor before and could give me the skinny. I'll put a volt meter on it when I get back to my shop and spin it with an air gun. See what that tells me.
So, I haven't posted In a while because my electric boat project stalled and I have been working like a mule but .. . .
The motor recently blew on my farm truck and since I already had a drive motor taking up space I've decided to do a conversion. I'll post the build in a different forum.
This is the motor I'm using, It's a bit on the big side but I already have it and it's light compared to the cast iron engine I pulled out - and It will fit.the space just fine.
This motor has a cooling fan which has it's own drive. I'm wondering if anyone is familiar with this and could give me any pointers on how it's powered. It has a three prong plug and I'm unclear how it should be hooked up. Not sure if one is neutral and the other two are low/high I'm planning on spinning the fan and poking the plug with a volt meter to see what that shows but I'd love a little guidance.
also there is what appears to be a signal wire on the other end of the motor if anyone has a clue what that is for.
So does that thing in the center look like a spring-loaded clutch, or that's just a retainer for the bearing ?
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
DIY Electric Car Forums
539.9K posts
88.6K members
Since 2007
A forum community dedicated to DIY electric car owners and enthusiasts. Come join the discussion about electric vehicle conversions, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more!