1. What is Electric Motor Operating Cost?

Electric motor operating cost refers to the total electricity cost required to run an electric motor for a specific period. This calculation helps businesses and individuals estimate energy expenses for motor-driven equipment and machinery.

2. How Does the Calculator Work?

The calculator uses the electric motor operating cost formula:

Where:

• \( HP \) — Motor horsepower rating
• \( 0.746 \) — Conversion factor from HP to kW
• \( Hours \) — Operating hours
• \( Rate \) — Electricity rate in dollars per kWh
• \( Efficiency \) — Motor efficiency percentage

Explanation: The formula converts horsepower to kilowatts, multiplies by operating hours and electricity rate, then divides by motor efficiency to account for energy losses.

3. Importance of Motor Cost Calculation

Details: Calculating motor operating costs helps in budgeting, energy management, equipment selection, and identifying opportunities for energy efficiency improvements.

4. Using the Calculator

Tips: Enter motor horsepower, operating hours, electricity rate in $/kWh, and motor efficiency as a percentage. All values must be positive numbers with efficiency between 0-100%.

5. Frequently Asked Questions (FAQ)

Q1: What is the 0.746 conversion factor?
A: 0.746 is the conversion factor from horsepower to kilowatts (1 HP = 0.746 kW).

Q2: How do I find my electricity rate?
A: Check your electricity bill for the rate per kWh, which is typically listed in the charges section.

Q3: What is typical motor efficiency?
A: Standard efficiency motors range from 85-95%, while premium efficiency motors can reach 95-97%.

Q4: Why include efficiency in the calculation?
A: Efficiency accounts for energy losses in the motor, providing a more accurate operating cost estimate.

Q5: Can this calculator be used for multiple motors?
A: For multiple identical motors, multiply the result by the number of motors. For different motors, calculate each separately and sum the costs.