Looking for replacement motors [not robots...]

Help & Support Robot Parts
1

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[/code]Hi,

I’m trying to work out which motors I need to get from the site to replace a pair of motors on my childs ride-on gator.

I can get them through Amazon but it means shipping from US and will take time & be expensive!

After a bit of reading I think I can get what I need here, (and may even get a bit more power).

Motor info lifted from a forum about modifying ride-ons in the US.

Peg Perego Part#: SAGI9993 10Tooth
Johnson Electric
HC683XLLG/FS/45070/5E1(CCW)
3.2mm Shaft, 10T Pinion Gear

https://images-na.ssl-images-amazon.com/images/I/71rMeQ3a4mL.SL1500.jpg

At No Load
Speed : 13444 Rpm
Current: 1.139 Amp
At stall (Extrapolated)
Torque : 499.680 m-Nm
Current: 64.576 Amp
At maximum efficiency
Efficiency : 70.77 %
Torque : 58.589 m-Nm
Speed : 11868 Rpm
Current : 8.578 Amp
Output : 72.844 Watts

At maximum power
Torque : 249.840 m-Nm
Speed : 6722 Rpm
Current : 32.858 Amp
Output : 175.944 Watts
Characteristics
Torque Constant : 7.877 m-Nm/Amp
E.M.F Constant : 7.877 mV/rad/sec
Dy. Resistance : 0.186 Ohms
Motor Regulation: 26.906 Rpm/m-Nm

At Torque Level:
Torque: 60.000 m-Nm
Speed: 11830 Rpm
Current: 8.757 Amp
Efficiency: 70.77 %
Output: 74.360 Watts

2

Should have said that I am UK based. Was hoping to speak to someone at the “shop” but it directs all technical help to the forum…

3

You really need to know the specs of the motor it’s replacing. Considerations include:

  • Dimensions (overall, as well as shaft)
  • Mounting hole location / dimensions
  • Nominal voltage
  • Current consumption
  • Torque

The electronics which will drive it need to be able to provide enough current, and the motor needs to be able to provide enough torque.

4

It’s running 12v.

Torque and current are in the data above I thought? That is what came from the original specs of the motors. Electronics are all in place.

Dimensions can be seen in this sketch (not to scale:

i729.photobucket.com/albums/ww292/austinh7/IMG_5519_zpsbixriy2t.jpg

5

My apologies - I misinterpreted that as the specs for the motor you want to use as opposed to that of the motor you are replacing. Therefore:

]Nominal voltage: 12V/:m]
]Torque: 8.5oz-in to 35oz-in/:m]
]Speed: 11868rpm to 6722rpm/:m]
]Current: up to 32.858 (max power), 8.757A @ rated torque./:m]Therefore we can assume the motor controller used can provide around 10A, but might not be able to provide 32A. Note that our comparable motors have 3.2mm diameter shafts as opposed to 3.1mm:
Although we do not have an identical motor, you might consider:
robotshop.com/en/rs-555-12v- … motor.html (slower)
robotshop.com/en/banebots-rs … motor.html (slower)
robotshop.com/en/banebots-rs … 00rpm.html (higher current, so be careful)

Other brushed DC motors:
robotshop.com/en/dc-motors.html