EZGO DCS Motor option

[scottyb]

It's a shame the govt could not mandate a useful scale for this instead of some of the ridiculous crap they have mandated.

[BobBoyce]

Originally Posted by scottyb

It's a shame the govt could not mandate a useful scale for this instead of some of the ridiculous crap they have mandated.

I agree. When electric vehicles are tested at the DOE (Department of Energy) lab, all specifications are based upon real life performance measurements. If an EV cannot maintain a manufacturers stated output without issues, such as overheating of the drive system or power storage system, power will be reduced and everything retested until it is able to maintain a given performance level. Those measured specifications are what must be published for that make and model vehicle. Not all EVs are required to be tested for performance and crash testing. There are exemptions. Golf carts are exempt from motor vehicle testing requirements.

The lab we tested at charged the manufacturer $250K per week of lab time for that testing.

Unfortunately, there are no regulations of that sort for many components of a vehicle, unless they are required to meet Mil-Spec for government contracts. The rest of us are pretty much on our own.

[JohnnieB]

HP is a calculated value based on either the Torque and RPM output from the motor, or the Voltage applied and the resulting Amp flow.

There are two variables in either calculation, so more than one set of variables can produce the same HP answer. The attached chart is for a fractional HP motor, but the shape of the power (HP) curve is roughly the same for cart motors.

Peak HP is midway between the stall torque and no-load RPM. On the two down slopes on either side of the peak point there are the same HP values, but each having different Torque and RPM values.

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The calculation for Mechanical HP is: Torque X RPM / 5252.
The calculation for Electrical HP is: Volts X Amps / 746.

The efficiency of a motor is the Mechanical HP output divided by the Electrical HP input.

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A HP rating without an associated RPM or Torque rating is like using a rubber band for a yardstick.

And that is for Series motors. It gets more complicated for SepEx motors due the the added variable of field strength.

[vagabond]

Originally Posted by scottyb

Wow - $630 for 2.5 hp OEM
or $459 for 8 hp Admiral B2, .....hmmmm?

Admiral is a good match for your XCT control, we have the field map for that too.

Oh yeah
my first b2 I bought from a local ezgo dealer with tax a little over 700.00, 2nd on I bought on line under 500.00 including shipping.