Home
Back
No Load Loss Equation:
| From: | To: |
Transformer No Load Loss (NLL) refers to the power loss in a transformer when it's energized but not supplying any load. It consists of hysteresis loss and eddy current loss in the transformer core.
The calculator uses the No Load Loss equation:
Where:
Explanation: Hysteresis loss occurs due to the magnetization and demagnetization of the core material, while eddy current loss results from circulating currents induced in the core.
Details: Calculating no load loss is essential for transformer efficiency analysis, energy consumption estimation, and transformer design optimization. It represents the constant loss that occurs whenever the transformer is energized.
Tips: Enter hysteresis loss and eddy current loss values in watts. Both values must be non-negative numbers.
Q1: What factors affect hysteresis loss?
A: Hysteresis loss depends on the magnetic properties of the core material, frequency of operation, and maximum flux density.
Q2: How can eddy current loss be reduced?
A: Eddy current loss can be minimized by using laminated cores, high-resistivity core materials, and thinner laminations.
Q3: Why is no load loss important in transformer selection?
A: No load loss represents the constant energy consumption of a transformer, which is important for calculating operating costs, especially for transformers that remain energized continuously.
Q4: Does no load loss change with load?
A: No, no load loss remains relatively constant regardless of the transformer load, as it depends primarily on the applied voltage and frequency.
Q5: How is no load loss measured in practice?
A: No load loss is typically measured by energizing the transformer at rated voltage and frequency with the secondary winding open-circuited, then measuring the input power.