MMP able to handle this Motor?

[Pdelcast]

To answer the original question -- for a 6 pole motor, maximum reasonable motor speeds are limited to around 42,000 RPM (25khz commutation frequency.) Above that, timing will start to fade towards neutral.

And you won't want to go any faster than that anyway -- magnetic losses would be terrible at those RPMs.

[outlaw]

Patrick,

you are the "Pro" here
Let me kindly ask you, why you suspect this ?

The motor we were talking about is a Tenshock 2240

22mm Rotor diameter 40mm long

I have a 5T = 3100kv

drkdgglr does have the 2240 as well, just 10T = 1560KV

The theard starter is talking about the 2220/6
Same typ of motor, just an 20mm long rotor.

Don't get me wrong ! I love your products and they are always first choice.
Can't wait to get a Mamba XL in my hands;-) to fill up my Castle collection

[Pdelcast]

Originally Posted by outlaw

Patrick,

you are the "Pro" here
Let me kindly ask you, why you suspect this ?

The motor we were talking about is a Tenshock 2240

22mm Rotor diameter 40mm long

I have a 5T = 3100kv

drkdgglr does have the 2240 as well, just 10T = 1560KV

The theard starter is talking about the 2220/6
Same typ of motor, just an 20mm long rotor.

Don't get me wrong ! I love your products and they are always first choice.
Can't wait to get a Mamba XL in my hands;-) to fill up my Castle collection

Generally, when designing a motor, the motor designer tries to maximize torque per amp/turn. The more torque the motor makes per turn, the more copper can be put into the motor per turn.

We are testing a Castle version of a 2622/1Y (28mm can outside diameter, 48mm can length) motor right now -- it's four pole, and 4200Kv with just 1 turn.
It's a 26mm diameter stator, with a 22mm length.

A 1 turn motor crams a TON of copper into the motor per turn -- yielding low resistance and giving high efficiency.

Lots of turns means less space for copper (per turn), and much higher copper losses in the motor (due to high resistance.)

Also, high pole count and high RPM usually don't work well together. Higher commutation speeds means higher iron losses.

The combination of high pole counts, and high turn count, just doesn't seem to make good engineering sense.

A 2 pole lehner 1940/10 also has approx. 1560kv. These are considered as good motors. Does the same rule apply here or are you specifically questioning the 6pole design?

btw, mine runs at 5s=28000rpm

[outlaw]

Patrick,

thanks a lot