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The basic rule of thumb is that you need 50V per 1000 RPM at 1000A [after major  just to be clear, this is MOTOR CURRENT]. That decreases to around 36V/1000 RPM at 400A. The incremental voltage between those incremental currents gives you the total resistance of the system, or 14V/600A = 23.3 milliohms. [after major  this method of calculating resistance is only correct if the motor is not spinning... mea culpa.]
The 400A tests were just to get a good feel for how much iterative tweaking of dyno load and throttle would be needed to get even spacing of both torque (current) and RPM (voltage). I then doubled the dyno load so it required 800A at 2000 RPM just to get a good incremental resistance data point. Finally, I increased dyno load again so that the full 1000A of the Soliton1 was required at 2000 RPM and 3000 RPM (2050 and 3050 as measured with a contact tachometer, respectively) to get the all important ratio of voltage per 1000 RPM.
The clusters are the result of plotting all of the datapoints in the log file for each RPM and load combination.
Note that the ratio of RPM/V is not precisely linear, but the point of this post is to give people a better idea of what sort of performance to expect from a WarP9 at currents/voltages way higher than are plotted in the official chart.
The 400A tests were just to get a good feel for how much iterative tweaking of dyno load and throttle would be needed to get even spacing of both torque (current) and RPM (voltage). I then doubled the dyno load so it required 800A at 2000 RPM just to get a good incremental resistance data point. Finally, I increased dyno load again so that the full 1000A of the Soliton1 was required at 2000 RPM and 3000 RPM (2050 and 3050 as measured with a contact tachometer, respectively) to get the all important ratio of voltage per 1000 RPM.
The clusters are the result of plotting all of the datapoints in the log file for each RPM and load combination.
Note that the ratio of RPM/V is not precisely linear, but the point of this post is to give people a better idea of what sort of performance to expect from a WarP9 at currents/voltages way higher than are plotted in the official chart.
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