1. What is Motor Efficiency?

Motor efficiency (η) is the ratio of mechanical power output to electrical power input, expressed as a percentage. It measures how effectively a motor converts electrical energy into mechanical energy.

2. How Does the Calculator Work?

The calculator uses the motor efficiency formula:

Where:

• \( \eta \) — Motor efficiency (%)
• Output Power — Mechanical power output (W)
• Input Power — Electrical power input (W)

Explanation: The formula calculates what percentage of input electrical energy is converted to useful mechanical energy.

3. Importance of Efficiency Calculation

Details: Motor efficiency is crucial for energy conservation, cost savings, and environmental impact. Higher efficiency motors consume less electricity for the same output.

4. Using the Calculator

Tips: Enter both output and input power in watts (W). Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a good motor efficiency percentage?
A: Standard motors typically range from 70-96% efficiency. Premium efficiency motors are usually above 90%.

Q2: Why is my motor efficiency over 100%?
A: This is impossible - check your measurements. Efficiency over 100% would violate energy conservation laws.

Q3: How can I improve motor efficiency?
A: Use properly sized motors, maintain them well, consider premium efficiency models, and ensure optimal loading.

Q4: Does motor efficiency change with load?
A: Yes, motors are typically most efficient at 75-100% of rated load, with efficiency dropping at lighter loads.

Q5: What factors affect motor efficiency?
A: Design, materials, load, temperature, voltage balance, maintenance, and operating conditions all affect efficiency.