Dual EE55 transformer for Battery Chargers

High-efficiency 7kW high-voltage isolation transformer designed with dual EE55 ferrite cores for 3P 380V & 4P 480V EV chargers and industrial power supplies. Delivers 48V/150A continuous output with ultra-low DCR and high isolation.

Modello: modello	2 x EE55
Ae(mm2) :	2 x 354
Potenza di riferimento:	7 kW

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Panoramica del prodotto

Il 7kW Dual EE55 High-Frequency Isolation Transformer (P/N: 179108) is specially engineered for high-power industrial battery chargers, 3-Phase 380V, and 4-Phase 480V EV charging stations. Featuring a unique dual EE55/21 PC95/3C95 ferrite core, this transformer efficiently handles continuous power delivery up to 7.2kW with high power density and excellent thermal dissipation.

Utilizing a combination of multi-strand Litz wire (250×0.1mm) for primary windings and heavy-duty copper foil (0.4mm x 30mm) for secondary high-current output, this transformer minimizes skin effect and proximity loss at high operating frequencies. It provides reliable 1500Vac safety isolation and ultra-low DC resistance (DCR ≤ 2.0mΩ), making it the perfect choice for demanding fast-charging applications.

Caratteristiche principali

Optimized for 7kW Charging Modules: Designed to interface seamlessly with 3P 380V and 4P 480V AC input systems converting to 48V DC nominal output up to 150A continuous current.
Dual EE55 High-Permeability Core Structure: Uses 4 pcs of EE56/21 PC95 high-frequency ferrite cores to ensure superior power density and effective thermal dissipation.
Low Loss Hybrid Winding Construction: Primary winding employs 250-strand Litz wire to suppress high-frequency skin losses, while secondary winding adopts high-thickness copper foil for ultra-low resistance at high output current.
High Dielectric Strength: Tested at 3600Vac / 50Hz / 60s insulation strength between primary and secondary windings.
Industrial-Grade Insulation System: Incorporates Dupont Nomex 410, Kapton PI tape, and high-temperature epoxy encapsulating material for maximum operating reliability under heavy workloads.

Key Specifications

Parametro	Specifiche / Valore
Model / Part Number	Hipower 179108 (48V150A)
Target Power Rating	7.0 kW – 7.2 kW Continuous
Input Voltage Range	3-Phase 380Vac / 4-Phase 480Vac
Output Voltage / Current	48V DC / 150A Max
Primary Inductance ( $L_s$ )	1.5 mH Min. @ 1.0 kHz / 0.3Vac
Leakage Inductance	1.5 µH Max. @ 100 kHz / 0.3Vac
Rapporto di trasformazione	2.75 : 1 (±1%) [(N1+N3) : (N2+N4)]
DC Resistance (DCR)	2.0 mΩ Max.
Dielectric Strength (Hi-Pot)	3600 Vac / 60s / 3mA (Pri to Sec)
Tipo di nucleo	Dual EE55 / EE56/21 PC95 (4 pcs)
Primary Winding Material	Ø0.1mm x 250P 2UEWF-PI Litz Wire
Secondary Winding Material	0.4mm x 30mm Copper Foil + 350×0.1mm Lead Wire
Dimensions (L x W x H)	75.0 mm Max x 60.0 mm Max x 61.0 mm Max
Lead-Out Wire Length	130 mm (8 mm tinned end)