Questions tagged [motor]

An electronic component that creates torque (rotational force) when electricity is applied.

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5
votes
1answer
46 views

Estimate safe ESC curerent for 4108 600kv motors?

Is there a way to safely guess what current ESC's will need to be with this motor (or any motor in general)? The motors are rated 23A in the table, but that's only with a 4s; I might use a 6s in the ...
5
votes
2answers
1k views

Can motors be “too big” for any reason?

I'm wondering, what would make a certain motor "too powerful/large" for a build? Could software/firmware of FC/ESCs be a problem? The only thing I could come up with is strength of the frame ...
4
votes
1answer
72 views

Motor size and Kv advice for ZD550?

I'm building my first drone out of the ZD550 frame. Most of the extra weight would be from a small gimbal like this (180g) and a gopro hero 4 (83g). What kv/size of motor would be ideal for this ...
5
votes
2answers
182 views

Motor output limiting

Can you configure your motor output limit on betaflight or DJI goggles? I know you can do it through the fatshark goggles, but I do not have parts to build a drone, so I am asking before I get 2700 ...
6
votes
1answer
81 views

How can I run 2207 2450Kv motors on 4S with 7” props?

I’m looking to use some spare motors I have to build a 7” rig. The problem is that they are 2450Kv, and I don’t want to burn out my other components. As I understand it, if I set a motor output limit ...
5
votes
2answers
38 views

Does motor KV requirement scale linearly with voltage?

There have been myriad questions regarding motor KV, such as this one. Many of these come close to answering my question, however none have given me a definite answer. If I am picking motors for a ...
4
votes
3answers
65 views

How useful is knowing the torque generated by a motor prop combination?

I'm designing a series of small drones for use in a swarm configuration in combination with terrestrial / marine / submarine robots. As part of the process, I've designed a test rig to measure the ...
6
votes
1answer
141 views

How to identify and address multirotor motor overheating

When flying my drone, I often notice my drone motors getting hot after a flight and am concerned that it could explode/blow up. What does a hot drone motor mean? Is this something to be concerned ...
4
votes
1answer
31 views

Modeling heat build-up in air-cooled outrunners

I'm creating a thermal model for heat build-up in my outrunner motors. So far, I haven't found any online resources that discuss this. Here is the basic equations for forced convective transfer: Q = ...
4
votes
3answers
89 views

How should one chose the correct motor KV for a build?

For a 5 inch, 4S build, the general advice is to go 2300-2750KV. For the same size but 6S, it should be ~1800KV. However the same motors could be used on a 4S 7 inch quad. And all of this scaling ...
15
votes
6answers
149 views

How does one hold the motor bell still when tightening prop nuts?

Almost all of the brushless motors used in hobby-grade multirotors have a single threaded shaft and rely only on friction between the propeller and motor to keep the prop from slipping. This means ...
10
votes
2answers
115 views

How hot is too hot when it comes to multirotor motors?

I hear this question asked all the time. Are my motors getting too hot? How hot is too hot for motors to get? Anyone have a great way to answer this question, possibly with some temperatures? I ...
5
votes
5answers
74 views

What affects the total flight time for a drone?

What factors would affect a drone's flight time? Battery capacity? Weight? Anything else?
6
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2answers
63 views

Differences between brushed and brushless motors - advantanges and disadvantages of each

When buying a drone I have 2 options to consider: brushed and brushless motors. Are they much different from each other? Does one have advantages over the other?
4
votes
2answers
48 views

How to tell if you have a brushed or brushless motor?

I understand there are 2 main types of motors: brushed and brushless motors. How can you tell visibly what type of motor you have without researching/reading the manual?
9
votes
2answers
61 views

One motor on quadcopter broken

I have a small quadcopter and I realised one of the motors does not turn electronically, meaning it can't fly properly. There is no visible sign of something stuck in the motor, like some string or ...
8
votes
3answers
116 views

Why does a brushless drone fly longer?

I have noticed that drones with brushless motors fly longer than those with brushed motors. Why are drones with brushless motors able to fly for longer amounts of time?
4
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3answers
77 views

Why do higher voltage batteries need lower KV motors?

I've noticed that higher voltage batteries need lower KV motors, why is this?
14
votes
2answers
88 views

Why do the motors on my drone keep spinning up and max out when I run up the throttle on my radio on the bench?

When I test my drone for the first time and I run the throttle up form my remote with the props off the motors keep spinning even when I bring my throttle back down. Will my quad flip out if I put the ...
7
votes
3answers
81 views

What process should I use to ensure my motors are spinning the correct direction when using Betaflight

I heard that a lot of problems occur due to one or more motors spinning the wrong direction. What process should I take to ensure that all my motors are spinning the correct direction if I'm using ...
8
votes
2answers
98 views

Why do brushless motors have 3 wires compared to 2 wires on a brushed motor? [closed]

I'm familiar with regular DC motors, which is what brushed motors appear to be. They have fixed stator magnets, rotor coils connected to the shaft and two brushes that power the coils at the right ...
8
votes
3answers
128 views

How can I reverse the direction of a brushless motor?

I have a brushless motor on my RC plane. After connecting it to an ESC and testing it I've found that it is spinning in the wrong direction. How can I reverse the direction the prop is spinning?
11
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2answers
177 views

What does KV mean on motors?

I've seen ratings on brushless DC motors like this one for something called KV. What does that rating mean?
16
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3answers
114 views

How do you figure out which motors to use for your UAV?

There are a ton of electric motors on the market. Is there a mathematical formula or some other means for figuring out what size of motor you will need for your airplane, helicopter, or drone?