Novak HV-Motor's??? - RC-Monster Forums

Takedown · **Novak HV-Motor's??? -** 12.27.2008, 10:58 PM

Ive been wondering this for awhile and I need to get it cleared up. Why is the novak hv-maxx motor's so dissapointingly bad if they are 4-pole motors that can be ran on sensorless esc's if programmed right? I mean you'd would think that it would preform great setup on a sensorless 5s-6s route. Thats if they made a low enough kv version...

lincpimp · 12.28.2008, 02:39 AM

Well, the motor is just too small. t=They have a small diamter rotor, thing 380 bl motor size. And the effecientcy may be high, but they are not very torquey and the smaller size causes issues with heavy vehicles and tall gearing. Plus they cost too much, and i am not sure that they are 4 pole, seem like a 2 pole motor to me...

E-Revonut · 12.28.2008, 03:15 AM

Novak HV motors are indeed a 2 pole motor

BrianG · 12.28.2008, 03:22 AM

Also, don't they use a slotted stator?

starscream · 12.28.2008, 05:36 AM

Quote:

Originally Posted by BrianG

Also, don't they use a slotted stator?

I'm not sure what your point is here...

The Castle NEU motors have slotted stators. This is stated in the description on the RCM product page:
"These motors are 4 pole, slotted, brushless motors wound with 1 turn in a Y configuration."

All things equal, slotted motors are more powerful than slotless motors. The makers of slotless motors make up for this by using high-energy, rare-earth magnets but this comes with a higher price tag.

If a high slot to pole design is used you should end up with a more efficient slotted motor.

I am happy with my HV7.5 and race with it in my mbx5. The HV motors do not have the torque of a NEU 1515 but, IMO, they work quite well for 1/8th scale buggy racing.

I purchased the HVPro 7.5 system for ~$215 shipped and I think that's a fair price for what you get.

Anyway,
In many (if not most) cases, the difference between 1st and 2nd place is the driver

Takedown · 12.28.2008, 01:46 PM

Well I had a novak velocity motor and it was a 4-pole so I assumed all were.

Takedown · 12.28.2008, 01:47 PM

Says on novaks site- Magnet: One-piece, multi-pole neodymium. It would have to be a 4-pole then wouldnt it?

E-Revonut · 12.28.2008, 03:49 PM

Quote:

Originally Posted by Takedown

Says on novaks site- Magnet: One-piece, multi-pole neodymium. It would have to be a 4-pole then wouldnt it?

multi just means more than one! It has been discussed on here before and Novak2 set the record straight and got the correct answer and told us that it was a 2 pole motor

BrianG · 12.28.2008, 05:22 PM

Quote:

Originally Posted by starscream

I'm not sure what your point is here...

No point really, just adding to the description. I well know the advantages of slotted in certain applications, and Patrick has gone into pretty detail on each type.

Takedown · 12.28.2008, 05:41 PM

Hmmm... I guess that answers my question.

himalaya · 01:40 AM

Quote:

Originally Posted by Takedown

Says on novaks site- Magnet: One-piece, multi-pole neodymium. It would have to be a 4-pole then wouldnt it?

Quote:

Originally Posted by E-Revonut

multi just means more than one! It has been discussed on here before and Novak2 set the record straight and got the correct answer and told us that it was a 2 pole motor

I wonder how can a magnet be made 1-pole. Due to physics nature, magnetic poles always apear in pairs, for instance, our planet earth.

What a Novak statement.

What's_nitro? · 12.29.2008, 02:06 AM

FWIW, if you ever need to figure out how many poles an inrunner motor has; Remove the rotor from the can, roll it on a flat metal surface, note how many times it "sticks" in one revolution.

Takedown · 12.29.2008, 02:10 AM

Quote:

Originally Posted by What's_nitro?

FWIW, if you ever need to figure out how many poles an inrunner motor has; Remove the rotor from the can, roll it on a flat metal surface, note how many times it "sticks" in one revolution.

Or just make it a helluva lot harder for yourself and open it up.

E-Revonut · 12.29.2008, 02:32 AM

Quote:

Originally Posted by What's_nitro?

FWIW, if you ever need to figure out how many poles an inrunner motor has; Remove the rotor from the can, roll it on a flat metal surface, note how many times it "sticks" in one revolution.

Using this method it is obvious that it's a 2 pole motor, I just tried it with my HV rotor with a snapped shaft

Takedown · 12.29.2008, 02:34 AM

Quote:

Originally Posted by E-Revonut

Using this method it is obvious that it's a 2 pole motor, I just tried it with my HV rotor with a snapped shaft

That makes total sense...