24V rated motor running on 36V

[fabieville]

I have a geared reduction 24v motor rated at 350watt, rated current is about 14amp.
Click the link below or copy and paste in your browser to see the motor:
http://www.ebay.com/itm/24V-350W-Electric-Motor-W-Gear-Reduction-Razor-Dirt-Quad-Scoo-24-Volt-350-Watt-/181116717059?pt=Motorcycles_Parts_Accessories&hash=item2a2b65c803&vxp=mtr


This is my concern:
Suppose I decide to operate the motor on 36v instead of 24v so that the motor spin faster but limit the wattage to the rated wattage of the motor which is 350watt, would the motor internal coil get too hot and burn?
Would the higher voltage cause any issues on the motor armature/bearings/magnets/brushes etc., seeing that the motor is now spinning faster than usual?
Would the motor efficiency drop even thou I limit the wattage to 350watt?
Would the brushes wear faster?

 

[markz]

You should be alright with a 12V increase, even double that.

 

[dumbass]

I have a geared reduction 24v motor rated at 350watt, rated current is about 14amp.
Click the link below or copy and paste in your browser to see the motor:
http://www.ebay.com/itm/24V-350W-Electric-Motor-W-Gear-Reduction-Razor-Dirt-Quad-Scoo-24-Volt-350-Watt-/181116717059?pt=Motorcycles_Parts_Accessories&hash=item2a2b65c803&vxp=mtr


This is my concern:
Suppose I decide to operate the motor on 36v instead of 24v so that the motor spin faster but limit the wattage to the rated wattage of the motor which is 350watt, would the motor internal coil get too hot and burn?
Would the higher voltage cause any issues on the motor armature/bearings/magnets/brushes etc., seeing that the motor is now spinning faster than usual?
Would the motor efficiency drop even thou I limit the wattage to 350watt?
Would the brushes wear faster?

There's an opinion that adding volts adds RPMs while adding amps adds torque. While that may or may not be true in your situation going from 24v to 36v is going to do nothing for you if you limit the wattage to 350w. Take a protytical Courie 24v 450w motor. It is generally teamed with a 35a controller. That equals 840w and yes I have seen that much on CA meter under loads. So in all likeliness that motor is well capable of drawing 650w without a problem. Now do that anyway you like.

FYI, I have run 24v geared Currie motor with 48v 50a controllers. It does double the "free wheeling RPM" of the motor. I have ridden with this setup for maybe 400 miles. The biggest problem is heat. I have a temp. Probe connected to the outside of the motor. So when it is 150f I get off the throttle and let it cool down. A twin motor setup this way allows you to flip from motor to motor as needed for the cooling period. But each motor requires a freewheel making this much more complicated. But works well.

36v should be much kinder to the motor. But I would still recommend a temp. Sensor so you know how hot it is getting. BTW, don't think that limiting the throttle is going to keep things under control for you because it won't. When the wind is blowing and that big hill is looking you in the face human nature is to use every bit of power you have available.

Bob

 

[Matt Gruber]

i use this on my 250w24v razor on 36v, set on LOW for 15 amps
http://www.ebay.com/itm/251321058051?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649