1. What is the Vishay Inductor Loss Formula?

The Vishay inductor loss formula calculates total power loss in an inductor by summing core losses (P_core) and copper losses (P_copper). This is a fundamental calculation for power electronics design and inductor selection.

2. How Does the Calculator Work?

The calculator uses the Vishay formula:

Where:

• \( P_{core} \) — Core loss in watts (magnetic hysteresis and eddy current losses)
• \( P_{copper} \) — Copper loss in watts (I²R losses in the winding)

Explanation: The total power loss in an inductor is the sum of its core losses (dependent on frequency and flux density) and copper losses (dependent on current and winding resistance).

3. Importance of Inductor Loss Calculation

Details: Accurate loss calculation is crucial for thermal management, efficiency optimization, and component reliability in power supply designs.

4. Using the Calculator

Tips: Enter core loss and copper loss values in watts. Both values must be non-negative. The calculator will sum them to provide total inductor loss.

5. Frequently Asked Questions (FAQ)

Q1: How do I determine core losses?
A: Core losses are typically calculated from manufacturer's datasheets using frequency and flux density, or measured experimentally.

Q2: How do I calculate copper losses?
A: Copper loss is calculated as I²R, where I is RMS current and R is winding resistance at operating temperature.

Q3: What are typical loss values?
A: Losses vary widely by application. In power supplies, inductor losses might range from milliwatts to several watts depending on power level.

Q4: Does this account for temperature effects?
A: No, this is a basic calculation. For precise results, temperature effects on core material and winding resistance should be considered.

Q5: When should I use more detailed loss models?
A: For high-frequency or high-power applications, consider more detailed models that account for skin effect, proximity effect, and nonlinear core behavior.