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looking for 24V-48V motor with high cogging torque

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looking for 24V-48V motor with high cogging torque

Old 09-23-2015, 08:54 AM
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jmsachs
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Default looking for 24V-48V motor with high cogging torque

I work on brushless motor controllers (not for RC market, sorry) and am trying to find some example BLDC motors in the 24-48V range with relatively high cogging torque. (yes, that's not a typo: high cogging torque, rather than low cogging torque).

If you know of any off-the-shelf parts (no ebay/alibaba please) of this type, I'd appreciate any pointers.
Old 09-25-2015, 11:04 AM
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aeajr
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High cogging torque. High is a meaningless term. High is higher than low but not as high as very high.

In any case you should be more specific in your application description. Are you looking for a motor with 100 grams of thrust or 100 pounds of thrust?

Really have no way to address your question.
Old 09-25-2015, 12:07 PM
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jmsachs
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OK, if you want to be pedantic, then let's say a cogging torque that's more than 2% of rated torque.

Except very few people out there have equipment to measure cogging torque... which is why I guess I'm just asking for noticeably high cogging torque. If you can spin a motor shaft by hand and you can feel the cogging torque, that's relatively high.
Old 09-25-2015, 12:28 PM
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Originally Posted by jmsachs View Post
OK, if you want to be pedantic, then let's say a cogging torque that's more than 2% of rated torque.

Except very few people out there have equipment to measure cogging torque... which is why I guess I'm just asking for noticeably high cogging torque. If you can spin a motor shaft by hand and you can feel the cogging torque, that's relatively high.
OK, that helps. Many of my brushless motors would fall into that category but not high enough voltage for your needs.

Now, how big of a motor do you need in wattage? 24V is fairly common for aircraft brushless. That is just 7 cells. 37 V would be readily available. Can't comment on the cogging nature.

I can't offer anything personally as I don't typically fly motors bigger than 4 cells but wanted to get more specifics from you so that someone else reading this might be able to help you. When the request is too vague generally no one answers. you had 40 views of this message and no one responded.

Best of luck

Last edited by aeajr; 09-25-2015 at 12:32 PM.
Old 12-29-2015, 01:36 PM
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Jimbonk
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The old and larger versions of the Aveox and Kontronik ( in runners ) were pretty "Coggy" . The larger ones were almost impossible to rotate by Hand. When Aveox went out of the Model Airplane Motor Business they stayed in the Industrial Brushless Motor Business, and I would not be surprised if Castle RC was also in the industrial business too. Someone like Steve Neu should be able to help.

Jim B

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