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Kostov™ EV motors & kits Traction Motors

SERIES DC MOTORS FOR ELECTRIC VEHICLE CONVERSIONS Traction Motors

SERIES DC MOTORS FOR ELECTRIC VEHICLE CONVERSIONS

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The motors are designed with an EV conversion/OEM use in mind. Some of their features are:
-optimised rpm so they are as close as possible to an internal combustion engine.
-larger and stronger commutators to minimise the possibility of lifting bars.
-class H insulation throughout the motors and heavy duty SKF bearings
-dual shaft, thermal cut off sensor and stainless springs as standard
-thermistor for real time monitoring of stator windings' temperature
-sensor bearings to measure rpm (9" models only) or proximity rpm sensors.

However the major distinguishing factor between Kostov motors and other brands are the interpoles which minimize arcing. They change the nature of an EV motor so fundamentally that direct comparison to non-interpoled versions is meaningless (a more detailed and technical explanation is available in the “On interpoles” section in our FAQ).
For similar power ranges, an interpoled motor has less weight (20-40% less), bigger diameter but much shorter body and the ability to handle high voltage. Less weight means a cheaper motor and of course more range.

Designation	Part Number	kW	RPM	Rotation	Voltage	Excitation	Duty	Frame size	IP	Outline drawings	Performance curves
Kostov 9" 144V	17R-31750	23.9	5700	REV	144 VDC	series	S2-60	220mm	IP 21
Kostov 9" 80V	17R-31927	17.2	5300	REV	80 VDC	series	S2-60	220mm	IP 21
Kostov 9" 288V /dual/	17R-32468	48	5700	REV	288 VDC	series	S2-60	220mm	IP 21
Kostov 11" 144V	R20-31949	32.5	5350	REV	144 VDC	series	S2-60	268mm	IP 21
Kostov 11" 192V	R20-00002	40.4	5300	REV	192 VDC	series	S2-60	268mm	IP 21
Kostov 11" 250V	R20-32079	45	5600	REV	250 VDC	series	S2-60	268mm	IP 21
Kostov 11" 400V /dual/	R20-32078	84.2	5500	REV	400 VDC	series	S2-60	268mm	IP 21
Kostov 13" 250V	R21-00003	65	4450	REV	250 VDC	series	S2-60	326mm	IP 21

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