A motor efficiency calculator normally requires input of essential characteristics such as the motor’s power consumption & output.
What is Motor Efficiency?
Motor efficiency is the ratio (or) percentage of input power that a motor, usually an electric one, can convert into consumable output power or load.
How to determine Motor Efficiency?
- Initially determine the input power.
- Following that, determine the maximum horsepower.
- Subsequently determine the load.
- Finally, calculate the motor’s efficiency.
Motor Efficiency Formula
Efficiency η (%)=(Output Power / Input Power )×100
This can be expressed in detail as,
Efficiency η (%) = (0.746 x HP X Load) / (Input Power x 100)
How is motor efficiency measured?
Input current & voltage waveforms are used to measure electric power. After getting torque & speed estimates, mechanical power (or load) is calculated by multiplying torque and speed. The motor efficiency is calculated by dividing the calculated mechanical power by the measured electrical power.
What is the efficiency of a 3 phase electric motor?
Normally, large three-phase induction motors are more efficient than single phase. Large induction motors can have an efficiency of up to 95% at full load, but 90% is more frequent.
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