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  • No : 21475
  • Release Date : 2018/08/22 16:27
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How can I calculate the processing torque from the measured power?

I use the standard three-phase motor SF-JR 7.5 kW 2P and the FR-A520-7.5K inverter to rotate the main shaft.

I want to calculate the processing torque of each while rotating at a certain output frequency.
The power is measured on the output side of the inverter. Can I calculate the torque from this power?


Is there any method to obtain the motor torque from the frequency and measured data (for example, current value)?
Category : 

Answer

You can calculate the torque from the power.

 

From the general equation: Pout = ωn × T

T = (Pout × τ)/ωn

Pout: Measured value

ωn: Actual motor shaft angular frequency (rad/s)

T: Torque

τ: Motor loss

Use this equation to calculate the torque.
Product Name
Inverter, magnet motor drive
Product Category
Others
Series
FR-A500

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