1. What is Power Consumption of Electric Motor?

Definition: This calculator estimates the power consumption of an electric motor based on voltage, current, and power factor.

Purpose: It helps electrical engineers, technicians, and facility managers determine the power requirements of electric motors.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_w \) — Power consumption (watts)
• \( V \) — Voltage (volts)
• \( I \) — Current (amps)
• \( PF \) — Power factor (unitless, between 0 and 1)

Explanation: The formula calculates real power consumption by accounting for the phase difference between voltage and current.

3. Importance of Power Calculation

Details: Accurate power calculation ensures proper electrical system design, energy efficiency, and cost estimation for motor operation.

4. Using the Calculator

Tips: Enter the voltage in volts, current in amps, and power factor (default 0.8). All values must be > 0, with PF ≤ 1.

5. Frequently Asked Questions (FAQ)

Q1: What is power factor?
A: Power factor is the ratio of real power to apparent power, representing how effectively current is converted to useful work.

Q2: What's a typical power factor for motors?
A: Most AC induction motors have power factors between 0.7 and 0.9 when fully loaded.

Q3: How do I measure current and voltage?
A: Use a multimeter or clamp meter to measure voltage across and current through the motor terminals.

Q4: Does this include startup current?
A: No, this calculates steady-state power consumption. Startup current can be 5-7 times higher.

Q5: How can I improve power factor?
A: Use power factor correction capacitors, ensure proper motor sizing, and maintain equipment.