# EMDtool

EMDtool is a continuously-developed Matlab toolbox for the design of electric motors using finite element analysis (FEA).

## Phisolosophy

Object oriented approach, with extendable base classes for e.g.

- Geometry creation
- Radial and axial flux motor models
- Circuits
- FEA problems

Click here for very partial documentation.

## Features

What you see here below probably isn’t up to date. However, at the time of writing, the situation is as follows:

Existing features:

- Time-static and transient analysis in 2D, with motion.
- Class-based geometry definition
- Flexible definition of circuits, including
- Polyphase circuits with current density, net current, or voltage supply
- Large solid conductors like rotor bars or solid shafts
- Axially-segmented solid conductors like permanent magnets

- Simple post-processing of quantities of interest, including
- Torque, current, and voltage waveforms
- Visualization of flux and eddy-current densities
- Losses

- Synchronous machine analysis with current supply (sinusoidal & PWM):
- Efficiency maps
- Equivalent circuits
- Automatic operation point iteration (current d- and q-axis components for reaching desired speed, torque point)

Features under development; working but not pretty:

- 3D analysis, static and transient
- Only linear so far, nonlinear next

- Rotation/motion
*almost*working

- Thermal analysis
- Rotor centrifugal stress analysis
- Different modulators
- SVPWM and SEH at the moment

Planned features:

- Synchronous machine analysis with voltage supply (sinusoidal or modulated)

## Pricing

Less than Ansys. Less than, or roughly on par with, rent money in many parts of the world, too.

## Gallery

Everything computed with EMDtool. Some 3D visualizations made with Paraview.