Kostov Motors 11" 250V Series Wound DC Motor K11-250

The motor's field switching option allows driving mods optimal for both racing and city driving. Series field mode gives lower rpm and higher torque both at a reduced amp draw making it ideal for the typical city conditions with frequent starts/stops and low average speed. Switching to parallel field mode increases rpm and nominal amp draw while decreasing torque a bit. This, however, doubles the copper cross section in the stator, greatly increasing overload ability. The result is a motor which can survive severe overloads while keeping rpm high so very little gear shifting is needed.   This motor also shares the same mounting faces and double shafts as other popular motors.  Internal Speed Sensor Option (ISSO) is only $110.00.

Model	RebirthAuto Price	Voltage	AMPS	Torque	Power	RPM	Weight	Diameter	Length
K11-250 Parallel Mode	$2500.00	192V	250A	53.8ft-lbs / 73Nm	51.2HP / 40.4kW	5300	178.5lbs / 81kg	10.43" / 265mm	16" / 406mm
K11-250 Series Mode		250V	210A	56.8ft-lbs / 77Nm	60.1HP / 44.8kW	5550

Mode	Power/lbs	Torque/lbs	Power/$100	Torque/$100
Parallel	0.286 HP/lbs	0.301ft-lbs/lbs	2.32HP/$100	2.44ft-lb/$100
Series	0.337 HP/lbs	0.318ft-lbs/lbs	2.40HP/$100	2.27ft-lb/$100

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Kostov Motors Comparison Table