Motor CAD Software

Romax Technology


Romax Technology are rotating machinery experts for geared and electro-mechanical systems providing simulation software and global services for design, performance simulation and manufacturing. Their mission is to transform the engineering of geared and electro-mechanical systems using Right First Time product development with their innovative software tools, global engineering expertise, processes and intellectual property.





Romax Nexus is the most complete simulation platform for engineering the next generation of electro-mechanical drive systems. It’s cloud-enabled ecosystem of applications align with your drivetrain and transmission development cycle, from rapid modelling and concept exploration to detailed simulation and virtual product sign-off. Intelligently integrated into the wider CAE world, Romax Nexus empowers your teams and enables Right First Time designs.

The three packages within the Romax Nexus platform that interface with Motor-CAD are:

  • Romax Concept
  • Romax Spectrum
  • Romax Evolve


Product detail


Romax Concept

Romax Concept is a rapid and intuitive early design tool for confident exploration of drivetrain ideas.

2D and 3D design and sizing is seamlessly combined with CAE simulation in an intuitive user interface to help drivetrain designers explore innovative solutions and make confident engineering decisions at the early stages of product development. Designs can be easily taken from Romax Concept and converted into CAD models and drawings, optimised multibody dynamic models and used in any other Romax Nexus product for more detailed analysis.

Romax Concept is able to import a native Motor-CAD file, allowing users to include electric machines created in Motor-CAD in a complete model of a powertrain system inside Concept. This enables a streamlined work flow for evaluating alternative e-powertrain architectures, bearing selection, early NVH assessment, materials costing and transitioning to detailed design and analysis in other Romax products and third-party CAD/CAE tools.


Romax Spectrum

Romax Spectrum provides a complete, validated solution for NVH simulation of electro-mechanical powertrain.

Providing fast, accurate frequency domain analysis for engineering insight and optimisation, Romax Spectrum combines validated analysis methods to predict dynamic gear excitations, with integrated links to electro-magnetic software to import and process motor forces. The powertrain NVH performance can be evaluated using frequency-domain simulation of system vibration response, or an embedded acoustic solver can be used to predict radiated noise and verify design targets.

The interface between Motor-CAD and Romax Spectrum allows the user to import a definition of the electrical machine active geometry (stator and rotor), as well as importing excitation data (tooth forces and torque ripple) required for NVH analysis. A single data file is used for this interface, minimising the amount of data handing, and reducing the risk of user error.


Romax Evolve

Romax Evolve is a multi-fidelity, application-specific tool for the structural design and analysis of electrical machines.

Romax have a proven track record in electro-mechanical simulation and design, rotor dynamic simulation for industrial generators and electrical machine NVH development. Romax Evolve incorporates this expertise into application specific tools for the structural design and analysis of electrical machines, which integrate into powerful multi-fidelity full system analysis. Romax Evolve includes capabilities for durability and efficiency analysis of bearings in electrical machines, rotor-dynamic analysis of rotor shafts, as well as NVH and acoustic analysis of electro-mechanical excitations.

Romax Evolve features the same interface capabilities as Romax Spectrum, whereby the user can import the definition of the electrical machine active geometry (stator and rotor), and excitation data for NVH analysis, within a single data file. In addition, Romax Evolve is able to import a complete electrical machine geometry (including active and structural parts) from a native Motor-CAD file, enabling a streamlined workflow from machine electrical design through to structural and dynamic simulation.


Product features

Complete process

  • End-to-end process integration from concept to detailed
  • Partnerships with industry-leading simulation tools, such as Motor-CAD
  • An integrated platform that streamlines and improves development

Complete solution

  • Simulation, analysis and optimisation
  • NVH, efficiency and durability
  • Any mechanical and electro-mechanical driveline

Complete system

  • System-level approach
  • Increased understanding of driveline behaviour
  • Considers all component misalignments and interactions


About Romax

Romax is the world’s leading provider of engineering and technology solutions for transport and wind turbine drivetrain design, simulation, testing and monitoring. If you’ve ever sat on a train, driven a car, traversed a building site, blended a milkshake, or paid an electricity bill, then the chances are you are in a chain of events that has been touched or shaped by Romax, its services or software. As a global leader in software and services for rotating + electric machinery, we work with more than 250 organisations, and our existence depends on helping them develop the right product, at the right time, for the right people.

Company Name: Romax Technology
Address: University of Nottingham Innovation Park, Triumph Road, NG7 2TU, UK
Phone: +44 (0)115 951 8800
Fax: +44 (0) 115 951 8801

Latest News

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Motor-CAD European User Conference 2020 – Save the Date

19th – 20th February 2020 I The 2020 Motor-CAD European User Conference will be held at the IET Austin Court in Birmingham, UK.

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New career opportunity for a Senior Research Engineer to join us at our Wrexham headquarters in the UK.

MDL welcomes Dr Melanie Michon, Head of Engineering

Motor Design Ltd is delighted to welcome Dr Melanie Michon, our new Head of Engineering.

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In our latest white paper, we discuss how different design choices, such as motor topology, winding type and cooling system, can be compared and evaluated with the overall system impact in mind.

Celebrating 20 years of Motor Design Ltd and Motor-CAD

Motor Design Ltd is proud to celebrate 20 years of Motor-CAD software! Read our interview with MDL founder and company president, Dr David Staton.

Latest software release – Motor-CAD v12

Motor Design Ltd is delighted to announce the release of Motor-CAD v12 — the latest version of our unique software package dedicated to the electromechanical performance of motors and generators and the optimisation of their cooling.

Motor-CAD European User Conference 2019

We are delighted to announce that Motor Design Ltd’s inaugural European Motor-CAD User Conference will take place on the 20th-21st February 2019, in Birmingham, UK. The two-day event will bring together engineers and researchers working on eMachine design to learn about technological developments, share best practice and discuss their challenges and approaches.

Workshop on ‘Design Trends and Performance Analysis of BEV & HEV Electric Machines’ at Motor & Drive Systems 2019

Dr. David Staton will be running a workshop on ‘Design Trends and Performance Analysis of BEV & HEV Electric Machines’ at the 2019 Motor & Drive Systems Conference in Orlando, Florida.


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