Core Power Conversion Applications in Switching Power Supplies
High-Frequency Transformer Cores:Serving as the core component of switching power supplies, these facilitate the high-frequency conversion of electrical energy to magnetic energy and back to electrical energy. They enable voltage step-up/step-down and electrical isolation, achieving energy conversion efficiencies exceeding 95% and significantly reducing the burden on thermal management design.
Power Factor Correction (PFC) Inductor Cores: Used in PFC circuits to improve the power factor on the input side and reduce harmonic pollution in the power grid; suitable for applications such as small-to-medium power switching power supplies and UPS systems.
DC-DC Converter Energy-Storage Inductor Cores: In topologies such as Buck and Boost converters, these cores store magnetic energy when the switching transistor is conducting and release energy to the load when it is turned off, thereby smoothing output current ripple and enhancing power supply stability.
Power Supply EMC Filtering Applications
Common-Mode Choke Cores: Used to form common-mode filters at power input/output terminals, blocking grid surges (such as those from lightning) and line-coupled common-mode high-frequency interference, preventing such noise from propagating into downstream circuits.
Differential-Mode Filter Inductor Cores: Suppress differential-mode high-frequency spikes on power lines and filter out noise and unwanted signals, thereby improving the purity of the power supply output.
Anti-Interference Ferrite Rings for Power Ports: Placed around the input or output cables of power adapters and automotive power supplies, these absorb high-frequency radiated noise, resolving issues such as screen flickering or signal interference during charging.
