EE33 transformer for 15kw VFD/Inverter with multi-outputs

The EE33 transformer is widely used in Variable Frequency Drives (VFDs) to provide stable, isolated power for control circuits, gate drivers, fans, sensors, and communication modules. 

Key Features

• High isolation up to 4kV
• Multiple output windings (5V/12V/15V/24V)
• Low EMI & low leakage inductance
• Suitable for 50–120 kHz switching frequency
• Supports Flyback / Forward / LLC topologies
• High-temperature ferrite material optional
• Compact size for VFD control boards

Typical Applications in VFDs

• Auxiliary SMPS power module
• DSP/MCU controller power
• IGBT/SiC gate driver supply
• Fan and relay power
• Sensor supply (current, voltage, encoder)
• Communication interface (CAN, RS485, Modbus)

Design Advantages for VFD Applications

• Stable operation under high dv/dt environments
• Designed for long-term 24/7 industrial operation
• Optimized for EMI compliance
• Low loss and reduced temperature rise
• Reliable isolation for high-voltage inverter systems

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Why Choose TRAFOPSU

• Fast lead time: Prototype in 7–10 days, 2-week production
• Low MOQ for industrial customers
• Engineering team with European background
• Strict quality control (100% hi-pot, inductance & functional test)
• Custom magnetic design for VFD, SMPS, chargers and industrial power