Electronically commutated motor calculation

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To calculate the energy consumption of an electronically commutated motor (ECM), knowing the voltage and current allows for straightforward power consumption calculations. Monitoring the electrical power draw is essential for accurate measurements. Alternatively, if the load and efficiency of the motor are known, the required power input can also be determined. These methods provide engineers with effective ways to assess ECM energy usage. Accurate calculations are crucial for optimizing motor performance and energy efficiency.
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hi everyone, I am an engineer in Singapore. I have come to a question that required the formula of calculating the energy consumption of ECM. Can my engineer bodies please give me a hand?
 
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Can you monitor the electrical power draw of the motor? If the know the voltage and current, you can calculate power consumption, which seems to me would be the most straightforward method.
 
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Or if you know the load and the efficiency you can calculate the power input needed.
 

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