KO Method X-Class Motor (430KV)

777.77

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KO Method X-Class Motor

This motor was designed for X Class FPV drones. X Class Drone Racing is the worlds first giant drone racing league for drones 800mm to 1200mm. KO tech is the very first motor company to incorporate a cooling system and other unique features.

KO motor for FPV racing drone

KO tech is the very first motor company to incorporate a cooling system to  RC brusless motors that does not rely on fans or fin style designs. 

The traditional fan or fin styled design calls for a fan machined in to the bell with on the inside or outside of the bell, this method has 2 major flaws. Firstly this design is" handed " meaning cw rotating motors must have a fan design orientated differently to a ccw voting motor if the fan is to be effective. Second is the fact that a fan or fan shaped spokes design robs the motor of power to drive the fan and In turn lowering response times, ultimate RPM and ultimate available torque.

 

KOtech has developed ACPC to compress oncoming air directly at the bell spoke face forcing the air past the spokes and directly into the stator and magnet assembly.

 

 This lowers the temps increases torque and dramatically increase response times all the way along the rpm  range. As a bonus the angled ring that forms the ACPC design is used as a counter balance used to reduce the amount of putty used to balance a motor bell.

KO motor for FPV X-class racing drone
KO motor for FPV drone

We are able to "clock" the ACPC ring a full 360 ° during the ballance procedure effectively halving the amount of putty needed to achieve a reading of "True" on the test equipment. This allows us to further reduce the bells weight and in turn improve motor response times.

 

Lastly because of this ability to reduce the amount of  balance putty needed we have also been able to reduce the lip at the base of the motor used as a rebate to retain the putty under high RPM centrifugal forces further reducing weight and Improving response times.

Power delivery from a brusless motor largely depends on the operating temperature throughout the duty cycle, this includes both the stator, magnets and windings.
KO has identified this as the main limiting factor when developing a motor to meet the high demands placed on a multi rotor motor. 
Cryo spray is a specially formulated freezing agent designed to drop the standing temp of the stator, windings and magnets to -30°c ( depending on ambient temp ) in order to both increase power, as well as lengthen the operational envelope  the motors can deliver peak power before heat soak causes power loss.

KO sourced a stator coating normally used in the automobile industry. This coating allows the stator to uniformly shrink and expand under the extreme temperature variance from -30°c to +30°c or higher, this coating has also eliminated the potential for the stator to rust due to the build of of moisture caused by condensation. Next we sourced an adhesive also from the automotive industry  for  the magnets and bell assembly with a temperature spread of -65°c to +265°C.

Specyfication:

  • 430kv 10 pole 2y windings 
  • Weight: 395g 
  • Tempered steel removable  shaft. 
  • Replaceable no slip prop grip plate . 
  • Hollow 8mm Replaceable main shaft. 
  • Replaceable base plate. 
  • 7075 aluminium bell / base plate. 
  • Open cage Ezo  19x8mm  bearings. 
  • Oil filled sump 
  • Unique half ahft design reduces the shaft length to 65% the length of other motors in this size class. 
  • Internal manual oil pump system 
  • Black coated stator compatible with Cryo spray. 
  • Bonding agents (glue)  used have a working temp range between -65 and +235°c making the motor compatible with Cryo spray. 
  • 12-14s 
  • 220°C high temp single winding copper. 
  • Sh52 180°c high temp curved  magnets.
  • 0.15mm stator laminates 
  • 0.15mm air gap 
  • Custom synthetic nylon winding fence wound into stator.
  • ACPC designed bell 
  • Integrated oil seal on top shaft.
  • 3 way  accessible wet sump, under the top shaft, oil sump plug in base and through removal of the base plate.
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