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Re: (ET) ET test box
A motor will look most like a motor :-)
The motor then needs a mechanical load... you could probably come up
with some sort of big heat-dissipating brake to do this.
Or make a simple passive dynamometer. Connect the output shaft of the
compound wound motor to a PM motor, which will run as a generator.
Connect the terminals of the PM motor to an electric load (resistors,
inverter, etc). Vary the electric load on the PM motor to vary the
mechanical load on the test motor. To be a true dynamometer, you'd have
to add meters to measure the resulting rpm & torque but you may not care
in this case.
Building your own controllers by chance? Collecting a box full of blown
FETs is always fun...
Geof Thompson wrote:
Gentlemen
I have a Technical question. I would like to create a test (load) box
replicate the load, of a ET motors so that I can benchtest controller
etc. I have quite a few machine that I need to restore and repair.
I am thinking for a PM motor a large resistor will work, but motors with
field weakening is beyond my limited electrical design capacity. Any
ideas would be welcomed along with suggested values of the components
etc. To say this another way I am looking to make a test box with
meters and resistors which will look like a motor to the Electrak
controlers. Once I get this going I will be happy to share the design.
--
Jim Coate
*The Electric Tractor Store*
http://www.ElectricTractorStore.com
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