New motor installed.

MillwrightMike · 09-17-2016, 12:46 PM

http://i1255.photobucket.com/albums/...7-13-44-59.png

Sent from my SM-N920V using Tapatalk

09-17-2016, 03:22 PM

JohnnieB · 09-17-2016, 03:44 PM

If you are running stock gears (12.44:1) in the differential, you would have to have 40" tall tires for the motor to only be spinning 2300 RPM at 22 MPH.

MillwrightMike · 09-17-2016, 06:54 PM

Quote:

Originally Posted by JohnnieB

If you are running stock gears (12.44:1) in the differential, you would have to have 40" tall tires for the motor to only be spinning 2300 RPM at 22 MPH.

That's why I'm so disappointed. I've read yours and others posts and expected much more.

http://i1255.photobucket.com/albums/...910_202028.jpg

Sent from my SM-N920V using Tapatalk

09-17-2016, 07:17 PM

MillwrightMike · 09-17-2016, 07:41 PM

Quote:

Originally Posted by JohnnieB

If you are running stock gears (12.44:1) in the differential, you would have to have 40" tall tires for the motor to only be spinning 2300 RPM at 22 MPH.

I was monitoring my ride last night and I tried to record it but I couldn't figure out how to pull it back up. But while watching it was steady in the 22xx rpm. Isn't that how torque motors run? I think I should've went with the Admiral D2.

Sent from my SM-N920V using Tapatalk

Volt_Ampere · 09-17-2016, 07:42 PM

Sounds like your speed sensor is set to the wrong number of poles. I bet it's running double the RPM it is reporting.

MillwrightMike · 09-17-2016, 11:38 PM

Quote:

Originally Posted by Volt_Ampere

Sounds like your speed sensor is set to the wrong number of poles. I bet it's running double the RPM it is reporting.

I think it's set to 8 poles. That would explain the recorded rpm but changing that is not going to increase my speed any right?

Sent from my SM-N920V using Tapatalk

JohnnieB · 09-18-2016, 08:21 AM

Quote:

Originally Posted by MillwrightMike

I think it's set to 8 poles. That would explain the recorded rpm but changing that is not going to increase my speed any right?

Sent from my SM-N920V using Tapatalk

Wrong. Set to 4-poles and see what happens.

The XCT uses motor RPM as well as Armature Amps and Throttle % to implement the field mapping, so by misinforming it that the motor is spinning at 2300 RPM when the throttle is at 100% and the motor is drawing relatively few Armature Amps, it thinks the situation calls for more torque rather than more RPM and ups the Field amps rather than lowering them. Basically, the XCT is running your motor in the torque mode all the time, so it will never operate at high RPM.

Attached is a 5-second snapshot of a data log (Several columns deleted so it will fit on single page) where my cart had just accelerated up fairly steep hill to a relatively level area and maxed out at 27.5 MPH due to the pack voltage drop while climbing the hill.

Note my Field Amps are 1.1A to 1.2A. What Field Amps does your data log show when you are running at top speed???????

MillwrightMike · 09-18-2016, 09:55 AM

Quote:

Originally Posted by JohnnieB

Wrong. Set to 4-poles and see what happens.

The XCT uses motor RPM as well as Armature Amps and Throttle % to implement the field mapping, so by misinforming it that the motor is spinning at 2300 RPM when the throttle is at 100% and the motor is drawing relatively few Armature Amps, it thinks the situation calls for more torque rather than more RPM and ups the Field amps rather than lowering them. Basically, the XCT is running your motor in the torque mode all the time, so it will never operate at high RPM.

Attached is a 5-second snapshot of a data log (Several columns deleted so it will fit on single page) where my cart had just accelerated up fairly steep hill to a relatively level area and maxed out at 27.5 MPH due to the pack voltage drop while climbing the hill.

Note my Field Amps are 1.1A to 1.2A. What Field Amps does your data log show when you are running at top speed???????

If I remember correctly it was just under 5. I'll run a diagnostic later today.

Thank you

Sent from my SM-N920V using Tapatalk

09-17-2016, 12:46 PM	#1
MillwrightMike Getting Wild Join Date: Apr 2016 Posts: 104	New motor installed. http://i1255.photobucket.com/albums/...7-13-44-59.png Sent from my SM-N920V using Tapatalk

09-17-2016, 03:22 PM	#2
crash test dummy Guest Posts: n/a	Re: New motor installed.
crash test dummy Guest Posts: n/a

09-17-2016, 03:44 PM	#3
JohnnieB Techno-Nerd Join Date: Jun 2011 Location: West Virginia Posts: 19,654	Re: New motor installed. If you are running stock gears (12.44:1) in the differential, you would have to have 40" tall tires for the motor to only be spinning 2300 RPM at 22 MPH.

09-17-2016, 07:17 PM	#5
crash test dummy Guest Posts: n/a	Re: New motor installed.
crash test dummy Guest Posts: n/a

09-17-2016, 07:42 PM	#7
Volt_Ampere Gone Wild Join Date: May 2012 Location: Rio Verde, Az Posts: 7,183	Re: New motor installed. Sounds like your speed sensor is set to the wrong number of poles. I bet it's running double the RPM it is reporting.

Today
BGW	Sponsored Links __________________ This advertising will not be shown in this way to registered members. Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum

Similar Threads
Thread	Forum
New Motor Installed...Does this look right?	Electric EZGO
Installed D&D motor on 98 DS	Electric Club Car
New motor installed and 28 MPH	Electric EZGO
Can a series motor be installed in DCS	Electric EZGO