Thread: Battery FAQ
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Old December 25th, 2009, 16:06   #71
Kos-Mos
 
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Join Date: Nov 2005
Location: Lévis (QC)
Thank you for your inputs.

I know my explanations are not the most accurate in an engineering point of view, but it I worded them so that the average person understands. I did make a mistake however, as voltage is equivalent to potential, where power is the 2-dimension unit representing the combination of both current and voltage.

In theory, DC motors do not drain an infinite amount of current. Every motor can be tested at a stall load to get the maximum current drained into the system.

That value is way past anything that the components of the AEG can hold for more than a few seconds. For all purposes and intend, the value is too large to be relevent. In this perspective, 100A in a system that can take at most 40A can be considered infinite.

When the system is powered by a battery that can deliver around 40-50A peak, it also can be considered infinite in the way that it is a lot above the physical limit of the components.

You cannot push more current into an electrical system because current is a 1-dimension unit. It represents the instantaneous amount of energy that flows in a device. To be able to "push" more current, it would need to be at least 2-dimensional. Voltage is a speed at which the current is moving, thus it can be "forced" faster into the device. The increase in current is only a side effect of the increase in power with the same load or resistance on the circuit.

Also, when using a microcontrolled MOSFET unit such as the Trigger Master, the signal going to the motor is an AC wave form generated by the PWM signal from the controller amplified by the MOSFET.
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