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BrianG · 05.02.2007, 11:57 PM

Personally, this is what I think about the Neus:

They have pretty low turn counts compared to their KV ratings. For instance, the 2.5 turn Neu 1512 2d has about the same kv as a 6 turn XL motor (and same delta coil configuration). So, this leads me to believe that the Neu has a highly inductive coil setup to compensate for lack of wire resistance. High inductive loads can be VERY difficult to drive due to the phase angles of current and voltage when driven by an AC signal (which is essentially what PWM DC is). It also doesn't help that the Neu coils are wrapped around a core of sorts to concentrate the magentic field for a stronger, more tightly controlled magnetic effect. When you add a core to an inductor, you immediately change its inductance value substantially.

I don't think the MM has the software to deal with these types of motors. But the Quark apparently does. Maybe the Quark's programming compensates for a "difficult" motor by adjusting timing, switching frequency, who knows? After all, both ESCs use the same FETs, so it's not a electronic capacity issue. We also know that MM's problem is not because the Neu is a 4 poler, because people have run 4-6 pole motors with apparently no issue. I think MM's problem is strictly in software. We also have to remember that the MM was designed specifically for MM motors. Since they are 2 polers, it only makes sense that most other 2 polers work as well. However, I bet if there was a two pole motor built similar to the Neu with low turn counts (yet typical KV rating) and a cored soil setup, that 2 pole would have similar problems as the Neu.

To be clear; I'm not knocking the Neus by any means. I LOVE mine and it works great on the Quark.

	(#11)
BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	05.02.2007, 11:57 PM Personally, this is what I think about the Neus: They have pretty low turn counts compared to their KV ratings. For instance, the 2.5 turn Neu 1512 2d has about the same kv as a 6 turn XL motor (and same delta coil configuration). So, this leads me to believe that the Neu has a highly inductive coil setup to compensate for lack of wire resistance. High inductive loads can be VERY difficult to drive due to the phase angles of current and voltage when driven by an AC signal (which is essentially what PWM DC is). It also doesn't help that the Neu coils are wrapped around a core of sorts to concentrate the magentic field for a stronger, more tightly controlled magnetic effect. When you add a core to an inductor, you immediately change its inductance value substantially. I don't think the MM has the software to deal with these types of motors. But the Quark apparently does. Maybe the Quark's programming compensates for a "difficult" motor by adjusting timing, switching frequency, who knows? After all, both ESCs use the same FETs, so it's not a electronic capacity issue. We also know that MM's problem is not because the Neu is a 4 poler, because people have run 4-6 pole motors with apparently no issue. I think MM's problem is strictly in software. We also have to remember that the MM was designed specifically for MM motors. Since they are 2 polers, it only makes sense that most other 2 polers work as well. However, I bet if there was a two pole motor built similar to the Neu with low turn counts (yet typical KV rating) and a cored soil setup, that 2 pole would have similar problems as the Neu. To be clear; I'm not knocking the Neus by any means. I LOVE mine and it works great on the Quark.