EE55 FLYBACK CONVERTER CHARGER TRANSFORMER 30A FOR 24V INVERTER(USED)
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This specification describes a high-power Flyback Converter designed to act as a battery charger for a 24V system. While the EE55 core is often used in Push-Pull or Full-Bridge topologies, using it in a Flyback configuration for 30A is a specialized design choice that requires careful management of "Air Gaps" to prevent core saturation.
Technical Specification Overview
Input: Usually Universal AC (90V–265V) or High-Voltage DC.
Output:28.8V (Bulk charge) to 27.6V (Float charge) at 30A.
Power Level:30A X 28.8Vapprox 865W.
Core: EE55 Ferrite (Large size to handle the high energy storage required by Flyback topology).
The Role of the EE55 in Flyback Mode
In a Flyback converter, the transformer actually acts as a coupled inductor. It stores energy in its magnetic field during the "ON" time and releases it to the battery during the "OFF" time.
1. The Critical Air Gap
A Flyback transformer must have a physical air gap (usually 1.0mm to 2.5mm) between the ferrite halves.
Purpose: The gap allows the core to store the energy required for a 30A output without the magnetic flux "clamping" or saturating the ferrite.
2. Winding for 30A Output
The secondary winding must handle 30A continuous current. At high frequencies, a single thick wire will suffer from massive heat due to the skin effect.
Secondary Construction: It is best to use Copper Foil or a massive bundle of Litz wire (e.g., 40–50 strands of 0.1mm wire).
Turns Ratio: Typically, for a 220V AC input, the primary will have many more turns than the secondary (e.g., 40T primary to 6T secondary).