Enter the net output of the shaft (watts) and the net electrical input to the motor (watts) into the calculator to determine the 3 Phase Motor Efficiency.
- All Efficiency Calculators
- 3 Phase Current Calculator
- Output Power Calculator
- Motor Efficiency Calculator
- Hydraulic Motor Efficiency Calculator
3 Phase Motor Efficiency Formula
The following formula is used to calculate the 3 Phase Motor Efficiency.
E3p = NO / NI *100
- Where E3p is the 3 Phase Motor Efficiency (%)
- NO is the net output of the shaft (watts)
- NI is the net electrical input to the motor (watts)
How to Calculate 3 Phase Motor Efficiency?
The following two example problems outline how to calculate the 3 Phase Motor Efficiency.
Example Problem #1:
- First, determine the net output of the shaft (watts). In this example, the net output of the shaft (watts) is given as 500.
- Next, determine the net electrical input to the motor (watts). For this problem, the net electrical input to the motor (watts) is given as 2000.
- Finally, calculate the 3 Phase Motor Efficiency using the equation above:
E3p = NO / NI *100
Inserting the values from above and solving the equation:
E3p = 500 /2000 *100 = 25 (%)
Example Problem #2:
Using the same process as above, first define the variables required by the formula. In this case, these values are:
net output of the shaft (watts) = 13
net electrical input to the motor (watts) = 82
Entering these values yields:
E3p = 13 / 82 *100 = 15.85 (%)
