1. What is Motor Absorbed Power?

Definition: This calculator determines the actual power consumed by an electric motor in a car based on voltage, current, and power factor.

Purpose: It helps automotive engineers and technicians understand the electrical load and efficiency of vehicle motors.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Absorbed power (Watts)
• \( V \) — Voltage (Volts)
• \( I \) — Current (Amperes)
• \( PF \) — Power factor (dimensionless, 0-1)

Explanation: The product of voltage and current gives apparent power, which is then adjusted by the power factor to get the true power consumption.

3. Importance of Power Calculation

Details: Accurate power calculation ensures proper electrical system design, battery capacity planning, and motor performance evaluation.

4. Using the Calculator

Tips: Enter the voltage (typically 12V or 24V for cars), current draw, and power factor (default 0.8). All values must be > 0.

5. Frequently Asked Questions (FAQ)

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

Q2: Typical power factor for car motors?
A: Most automotive motors have power factors between 0.7-0.9, with 0.8 being a common default value.

Q3: How do I measure current?
A: Use a clamp meter or multimeter in series with the motor circuit while operating under normal load.

Q4: Why does voltage matter?
A: Vehicle electrical systems vary (12V/24V/48V), and power consumption changes proportionally with voltage.

Q5: Does this include startup current?
A: No, this calculates steady-state power. Startup currents are typically much higher but brief.