<p>No, changes in speed should have little effect. The only wearing part of a brushless motor is the bearings, which are generally rated for a certain number of rotations and a certain load (and are reasonably easy to replace).</p>

<p>With IC engines there are complex issues piston and bore temperature, expansion, lubrication and heat cycling - but electric motors are much simpler.</p>

CC BY-SA 4.0
2020-05-21T08:43:23.907Z
2020-05-21T08:43:23.907Z
Robin Bennett
<p>If you had a brushless dc motor and kept it running but changing the power input every few seconds/minutes would it wear it out?</p>

<p>I ask because for a drone like aircraft I'm designing, making turns requires change in rpm and input power. If it helps, the motors are large and 167kv bldc motor with 100cc.</p>

<brushless-motors>
Does frequently changing the amount of power to a bldc motor wear it out?
Gabriel Kusiak
# Does frequently changing the amount of power to a bldc motor wear it out?

(Asked by: username_0 on 2020-05-21)

If you had a brushless dc motor and kept it running but changing the power input every few seconds/minutes would it wear it out?

I ask because for a drone like aircraft I'm designing, making turns requires change in rpm and input power. If it helps, the motors are large and 167kv bldc motor with 100cc.

**Tags:** brushless-motors


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## 1 answers

### Answer by username_1 on 2020-05-21. Score: 12 | Accepted answer

No, changes in speed should have little effect. The only wearing part of a brushless motor is the bearings, which are generally rated for a certain number of rotations and a certain load (and are reasonably easy to replace).

With IC engines there are complex issues piston and bore temperature, expansion, lubrication and heat cycling - but electric motors are much simpler.


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