Transformer FAQ
What is an inverter-duty transformer?
An inverter-duty transformer is designed for the electrical and thermal stresses associated with power-electronic converters and inverter-connected systems.
Direct answer
An inverter-duty transformer is specified for service with power-electronic equipment such as solar inverters, wind converters, battery PCS or industrial drives. Depending on the circuit, the design may need additional turn insulation, electrostatic shielding, harmonic-loss allowance, split windings, controlled impedance, reduced flux density and specific thermal cycling capability.
Why a standard transformer may be insufficient
Fast switching can introduce steep-front voltage pulses and common-mode noise, while converter current may contain harmonics or a small DC component. The severity depends on topology, cable length, filters and switching frequency.
Typical design measures
Possible measures include reinforced turn insulation, electrostatic shields, winding segmentation, thermal margin, optimized core flux density and mechanical reinforcement.
Information required
Provide converter topology, waveform or harmonic spectrum, switching frequency, cable length, filters, voltage, capacity, duty cycle, grounding and expected overloads.
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