Three Phase Motor Efficiency Calculator

This calculator helps determine the efficiency of a three-phase motor by comparing power input to power output.

Input Parameters

Calculation Results

Calculation Formula

Efficiency (η) = (Power Output / Power Input) × 100%

Where:
Power Input: Total electrical power consumed by the motor
Power Output: Mechanical power delivered by the motor
Efficiency: Percentage of electrical power converted to mechanical power

Three Phase Motor Efficiency Calculator Usage Guide

Learn how to use the Three Phase Motor Efficiency Calculator and understand motor efficiency calculations

How to Use This Calculator

  1. Enter the Power Input (kW) - this is the total electrical power consumed by the motor.
  2. Enter the Power Output (kW) - this is the mechanical power delivered by the motor.
  3. Enter the Line Voltage (V) - the voltage of the power supply.
  4. Enter the Line Current (A) - the current drawn by the motor.
  5. Click the "Calculate" button to compute the motor efficiency and related parameters.
  6. The results will show the efficiency percentage, input power, and output power.

Understanding Motor Efficiency

Motor efficiency is a measure of how well the motor converts electrical energy into mechanical energy. It is expressed as a percentage and is calculated as:

Efficiency (η) = (Power Output / Power Input) × 100%

A higher efficiency means less energy is wasted as heat, resulting in lower operating costs and reduced environmental impact. Typical motor efficiencies range from 80% to over 95% for modern motors.

Practical Applications

  • Comparing the efficiency of different motors to make informed purchasing decisions.
  • Assessing the energy consumption of existing motor systems.
  • Designing energy-efficient motor replacement programs.
  • Compliance with energy efficiency standards and regulations.