EMAG · Transformers & Power Engineering

Transformer electromagnetic simulation with EMWORKS EMAG

EMWORKS EMAG uses finite element analysis to compute electromagnetic fields, losses, thermal distribution, and structural loads in transformer cores, windings, and tanks — from a single-phase distribution unit to a high-power three-phase system.

Core saturation detection

Switching frequency loss trade-off

Thermal derating

Winding insulation stress

Vibration & noise from magnetostriction

Short-circuit structural loads

Equivalent circuit extraction

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Recorded · June 18, 2026

Planar Transformer Design and Simulation for EV Power Conversion

This webinar is about planar transformers in EV power electronics, covering design constraints, high-frequency effects, and EMWORKS simulation for real-world design.

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Transformer types

What EMWORKS EMAG simulates

Power & Grid

Power transformer

Grid-level voltage conversion, core and winding loss, load regulation

Measurement & Safety

Current transformer (CT)

Ratio accuracy, burden, saturation under fault current

Voltage transformer (PT)

Accuracy class, phase error, insulation stress

Power Electronics

Flyback transformer

Switching frequency losses, leakage inductance, core selection

Forward converter

Core reset, flux density, loss at operating frequency

Planar transformer

Winding proximity effects, low-profile thermal management, PCB-layer losses

Watch

How EMWorks simulates transformer electromagnetics

6:12

Transformer design & simulation with EMWorks EMAG

In this series

2 videos

Capability

Core loss and efficiency

EMWORKS EMAG AC Magnetic study computes core losses separated by loss mechanism — hysteresis, eddy current, and excess loss — using the laminate's measured P-B curve. Results are available as totals, per-component values, and 3D field plots. Winding copper losses are computed simultaneously from current density distribution.

Hysteresis loss (W)

Eddy current loss (W)

Excess loss (W)

Total core loss (W)

Copper loss (W)

Core loss density — 3D plot

▶

AC Transformer Core Loss and AC Magnetic Simulation with EMWorks

C-core transformer, 50 Hz — flux density, current density, separated core losses

Capability

Thermal management

EMWORKS EMAG couples AC Magnetic and steady-state thermal solvers in a single study. Joule losses and core losses are passed directly as heat sources to the thermal solver. Results include temperature distribution across core, windings, and tank, and heat flux through insulation and cooling surfaces.

Temperature distribution (°C) — 3D plot

Hotspot location and magnitude

Heat flux (W/m²)

Winding temperature rise (ΔT)

▶

Electro-Thermal Modeling of 3-Phase Transformers: Techniques & Insights

Short-circuit secondaries — eddy, hysteresis, winding losses, temperature distribution

▶

Virtual Prototyping of a 3-Phase Cylindrical Transformer

Open-circuit — AC Magnetic + thermal, flux density, core losses, temperature distribution

Capability

Open and short-circuit test simulation

EMWORKS EMAG runs virtual open-circuit and short-circuit tests from a CAD model with defined laminate properties and coil windings. Each test runs as a separate AC Magnetic study. Results build the transformer's equivalent circuit and support evaluation of efficiency in system-level simulations — without a physical prototype.

Core loss (open-circuit)

Copper loss (short-circuit)

Leakage inductance

Winding resistance

Equivalent circuit parameters

▶

Understanding Open and Short Circuit Testing Simulation for Transformers

Single-phase — virtual OC and SC tests, equivalent circuit extraction

Capability

Vibration, noise, and structural loading

Magnetostriction in the core and Lorentz forces on the windings are the primary sources of transformer vibration and noise. EMWORKS EMAG couples AC Magnetic with a linear static structural solver to compute displacement and stress in core, windings, and tank. Magnetic shunts can be modeled to evaluate their effect on tank loading and vibration.

Core displacement (nm-scale)

Winding displacement (µm-scale)

Tank displacement (µm-scale)

Mechanical stress (N/m²)

Safety factor

Force per component (N)

▶

Impact of Magnetic Shunts on High-Power Transformer Performance

Short-circuit — magnetostriction forces, Lorentz forces, displacement and stress in core, windings, and tank with/without shunts

Get started

Simulate your transformer before you build it

Run virtual open- and short-circuit tests, extract core and winding losses, and check hotspots and tank vibration — all from your existing CAD model.

No physical prototype
Built into your CAD
Support from real engineers

Request a free trial Talk to an engineer

EMWorks EMAG result Flux density · 3D plot

Reference

All application notes — Transformers

Electro-Thermal Modeling of 3-Phase Transformers: Techniques & Insights

Short-circuit secondaries — eddy, hysteresis, winding losses, temperature distribution

AC Magnetic Analysis Thermal Coupling

Virtual Prototyping of a 3-Phase Cylindrical Transformer

Open-circuit — AC Magnetic + thermal, flux density, core losses, temperature distribution

AC Magnetic Analysis Thermal Coupling

AC Transformer Core Loss and AC Magnetic Simulation with EMWorks

C-core transformer, 50 Hz — flux density, current density, separated core losses

AC Magnetic Analysis

Single-Phase Transformer | AC Magnetic and Thermal Analysis

M27 laminated core, 60 Hz open-circuit — separated losses, temperature rise

AC Magnetic Analysis Thermal Coupling

Understanding Open and Short Circuit Testing Simulation for Transformers

Single-phase — virtual OC and SC tests, equivalent circuit extraction

AC Magnetic Analysis

Impact of Magnetic Shunts on High-Power Transformer Performance

Short-circuit — magnetostriction forces, Lorentz forces, displacement and stress in core, windings, and tank with/without shunts

AC Magnetic Analysis Structural Coupling

FAQ

Frequently asked questions

What types of transformers can EMWORKS EMAG simulate?

Power and distribution transformers, instrument transformers (CT and PT), isolation and autotransformers, and power electronics types including flyback, forward, and planar designs. Single-phase and three-phase topologies. Models built directly from CAD geometry.

What study types are available for transformer simulation?

AC Magnetic for field, loss, and frequency-domain analysis. AC Magnetic coupled with thermal for temperature distribution and hotspot prediction. AC Magnetic coupled with linear static structural for displacement and stress from magnetostriction and Lorentz forces. Transient Magnetic for time-domain and switching behavior.

Can EMWORKS EMAG extract equivalent circuit parameters?

Yes. Virtual open-circuit and short-circuit tests run as separate AC Magnetic studies and produce core loss, copper loss, leakage inductance, and winding resistance — the parameters needed to build the transformer's equivalent circuit for system-level simulation.

Does EMWORKS EMAG handle magnetostriction and vibration analysis?

Yes. AC Magnetic couples with a linear static structural solver to compute displacement and mechanical stress from magnetostriction forces in the core and Lorentz forces on the windings. Results are available per component — core, windings, and tank separately.

How do I access EMWORKS EMAG for transformer simulation?

A free trial is available on request. EMWORKS engineers support the evaluation — including guidance on study setup and result interpretation for your specific transformer design.

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