# Calculating BLDC controller efficiency

1. ## Calculating BLDC controller efficiency

Hello guys,

I am working on bldc motor controller project and now i have to calculate its efficiency.
What is the equipment used to calculate BLDC controller efficiency in industry level?

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2. ## Re: Calculating BLDC controller efficiency

Hi,

What efficiency?

Motor_mechanical_power_out / electrical_DC_power_in ?

Klaus

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3. ## Re: Calculating BLDC controller efficiency

Originally Posted by KlausST
Hi,

What efficiency?

Motor_mechanical_power_out / electrical_DC_power_in ?

Klaus
yeah that's the formula used.
But I want to know what are the equipments used to test the bldc motor controller.
To find,
efficiency
torque and etc.

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4. ## Re: Calculating BLDC controller efficiency

Hi,

I just did an internet search for "motor test equippment" ... a lot of good looking results.
Did't you try this in your own?

And for DC.. maybe just voltage and current measurement is sufficient.

Klaus

5. ## Re: Calculating BLDC controller efficiency

A paddle in liquid is a simple way to load a motor. You alter it with ease, by immersing less or more of the paddle. Or by using liquids with less or more viscosity.

In engineering class we tested our homemade turbines, by clamping a slotted block of metal around the rotating shaft. We tightened the clamp until the block just started to bind. Then rpm was measured by stroboscope. This became the turbine's torque score.

Usually a motor has a certain rpm which produces the most torque, or most work delivered to a load. In other words its most efficient operating rpm. A lot of things contribute, including your controller of course.

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