Question about Alltrax installation

[Volt_Ampere]

The 36 to 48 only increases torque if the controller can supply more current.

[cgtech]

Originally Posted by Volt_Ampere

The 36 to 48 only increases torque if the controller can supply more current.

I disagree. 48v delivers 33% more watts to the motor, all with the same amp controller.

[scottyb]

My experience is 33% more torque and speed when applying 48v to the 36v motor

[JohnnieB]

CG hit the nail on the head.

A DCX500 will allow the motor to draw 18kW at 36V, 21kw at 42V and 24kW at 48V.

[Turbo_Pumpkin]

Originally Posted by scottyb

If you have the stock motor I prefer to recommend the 42v upgrade. Bottom line is 42v just puts less strain on the stock motor and produces 17% more speed and torque - that is a noticeable difference from the driver's seat. JohnnieB and myself are both running 42v PDS carts. The performance is noticeably better than 36v

I have the following:

6" lift, 23" tires, ausco rear disc brakes, 500 amp controller and all supporting hardware, 2ga wires, admiral motor (torque motor I think).

It drives good so far but I just know I'll want more soon so that's why I was asking about 48v. On gps it does 23-24 ish with the windshield up.

[JohnnieB]

Originally Posted by Turbo_Pumpkin

I have the following:

6" lift, 23" tires, ausco rear disc brakes, 500 amp controller and all supporting hardware, 2ga wires, admiral motor (torque motor I think).

It drives good so far but I just know I'll want more soon so that's why I was asking about 48v. On gps it does 23-24 ish with the windshield up.

What model Admiral motor?
What Field Map are you using in the DCX controller?

If the Field Map doesn't match the motor, you won't get optimal performance and you might get excessive motor heat.

With 23" tires, a torque motor is a good choice.

If you have the motor I suspect you do (MOT-B2), about 23-24 MPH on 23" tires works out about right mathematically, so at 48V you should see about 30-32 MPH. (26-27 MPH at 42V)

[Turbo_Pumpkin]

Originally Posted by JohnnieB

What model Admiral motor?
What Field Map are you using in the DCX controller?

If the Field Map doesn't match the motor, you won't get optimal performance and you might get excessive motor heat.

With 23" tires, a torque motor is a good choice.

If you have the motor I suspect you do (MOT-B2), about 23-24 MPH on 23" tires works out about right mathematically, so at 48V you should see about 30-32 MPH. (26-27 MPH at 42V)

I will look later to see what model but I bought it as a package from one of the site sponsors. I was told that the map was set to match the motor and my setup. I am hoping to play around some with it soon but for now I've been just driving it.

[Volt_Ampere]

No! Torque is proportional to current not watts. HP is proportional to watts. You need more current to have more torque.

[JohnnieB]

Originally Posted by Volt_Ampere

No! Torque is proportional to current not watts. HP is proportional to watts. You need more current to have more torque.

You are correct about torque being proportional to amps, but motor impedance is proportional to RPM and if more voltage is applied to an impedance the amp flow increases (I=E/R).

Therefore, at any given RPM, increasing the applied voltage, increases the amps flowing, thus increasing the torque at that RPM.

Having a controller that limits the max amps to 300A, 400A, 500A, etc., does limit the maximum low end torque, but a higher voltage increases the RPM at which the maximum torque can be reached.

Basically, as shown on the attached chart, increasing the voltage applied to a DC motor increases both the Stalled-Torque and No-Load RPM.

[DaveTM]

Gheeez....I get a headache when I read this stuff. Now....who want's to talk about Estate and Trust taxation? Minimum trust distributions? Trust accounting vs. tax accounting? Or the new and even higher lifetime estate tax exemption?