What are ferromagnetic materials and why are they used for transformer cores?
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what is magnetizing current
- How does the voltage drop across the transformer's impedance (including the magnetizing branch) vary with the load and power factor?
- Does magnetizing current contribute to useful work? How does the voltage applied to the primary winding affect magnetizing current?
- What are the typical tolerances allowed for magnetizing current measurements in factory acceptance tests?
- What is the significance of the power factor associated with the magnetizing current? How does the power factor of the magnetizing current compare to the power factor of the load current?
- How is magnetizing current related to the core material? What happens to magnetizing current if the core has an air gap?
- How do more advanced non-linear models, such as the Jiles-Atherton model, represent the hysteresis and saturation effects in the core material and their impact on magnetizing current?
- How does the design of high-frequency transformers differ from low-frequency transformers with respect to magnetizing current and core material selection? What are the challenges in designing transformers for DC-DC converters, where the concept of AC magnetizing current needs to be adapted?
- What are the specialized core materials or transformer designs used in aerospace to minimize size and losses while maintaining performance?
- How is magnetizing current measured? What instruments are used to measure magnetizing current?
- Are there specific transformer designs optimized for renewable energy applications with respect to magnetizing current and harmonic handling? How does the magnetizing current contribute to the overall impedance of a transformer as seen from the primary side under no-load conditions?
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