1. What is Motor Power Consumption?

Definition: This calculator estimates the electrical energy consumed by an electric motor based on its power rating and operating time.

Purpose: It helps determine electricity usage for motor-driven equipment, allowing for energy cost estimation and efficiency analysis.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( E \) — Energy consumption (kilowatt-hours)
• \( P \) — Motor power (watts)
• \( t \) — Operating time (hours)

Explanation: The motor's power consumption in watts is multiplied by operating hours, then divided by 1000 to convert to kilowatt-hours (kWh).

3. Importance of Power Consumption Calculation

Details: Accurate energy consumption estimates help with electricity cost budgeting, energy efficiency improvements, and equipment selection.

4. Using the Calculator

Tips: Enter the motor's rated power in watts and the total operating time in hours. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Where do I find the motor power rating?
A: Check the motor nameplate or manufacturer specifications, typically listed in watts (W) or kilowatts (kW).

Q2: Does this account for motor efficiency?
A: No, this calculates theoretical consumption. Actual usage may be higher due to efficiency losses (typically 80-95% for electric motors).

Q3: How do I calculate cost from kWh?
A: Multiply the result by your electricity rate (e.g., $0.12 per kWh).

Q4: What if my motor power is in horsepower (HP)?
A: Convert HP to watts (1 HP ≈ 746 watts) before using the calculator.

Q5: Does this work for variable speed motors?
A: Only if using average power consumption. For precise results with variable loads, use a power meter.