The thermal model in Motor-CAD is based upon analytical lumped-circuit analysis making it extremely fast to calculate. This allows the user to perform ‘what-if’ calculations in real time. Alternative numerical methods typically require days or even weeks to model and several hours to calculate a solution.
All the thermal resistances and capacitances in the Motor-CAD model are calculated automatically from geometric dimensions and material properties. The user does not need to be familiar with complex heat transfer phenomena such as dimensionless analysis correlations for convection. Motor-CAD automatically selects and solves the most appropriate formulation for a given surface and the cooling type selected. Motor-CAD features efficient, accurate and robust mathematical algorithms for forced and natural convection, liquid cooling, radiation and conduction. An extensive library of proven laminar and turbulent convection correlations are used to give accurate models for all internal and external surfaces. The airgap model includes laminar, vortex and turbulent convection.
The software is used to optimise the cooling of a wide variety of motor types and cooling methods. The fast calculation speeds are huge benefit when modelling complex duty cycles, such as traction motor drive cycles, and applications such as elevator load cycles.
Motor-CAD modules are available for the following motor types:
- Brushless permanent magnet motors (BPM)
- Outer rotor BPM motors
- Induction motors
- Permanent magnet DC machines
- Switched reluctance motors
- Synchronous reluctance motors
- Synchronous machines
- Claw pole machines
- Universal motors
There are many different motor types, housing types and cooling types available in Motor-CAD.
Motor-CAD models are available for the following cooling methods:
- natural convection (TENV)
- forced convection (TEFC)
- through ventilation
- water jackets (several configurations)
- wet rotor and wet stator
- spray cooling
Users are also able to include various mounting configurations in the model that can provide heating or extra cooling to the machine.
Motor-CAD uses powerful analytical methods to calculate the performance of electric machines and cooling systems.
The Motor-CAD FE-Therm add-on module provides increased detail on conduction heat transfer in various components. For example this allows visualisation of the hotspot in the winding.
It can be used to analyse conduction heat transfer for complex geometries such as multi-layer interior magnet motor rotors.
FE-Therm can be used to calibrate analytical lumped circuit models, thus improving accuracy.
It is fully automated and takes only a few seconds to calculate.
This image shows an automatic model generation with detailed conductor mesh:
The image below is a form wound machine showing the winding hotspot:
This shows slot water jacket cooling with two cooling ducts inside the slot:
This shows magnet losses impacting on temperatures:
The features in the FE-Therm module allow for a full 3D model of the machine to be generated with results as shown here:
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.
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.
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.
We are delighted to announce that the Electric Drive Tail Rotor Team, which included representatives from MDL, was awarded a Team Bronze Medal at the 2018 Royal Aeronautical Society awards ceremony in November.
Watch our webinar on ‘Accounting for AC Winding Losses in the Electric Machine Design Process using Motor-CAD’
Watch a recording of our recent webinar on ‘Accounting for AC Winding Losses in the Electric Machine Design Process using Motor-CAD’.
Registration open for our training course on the design of brushless permanent magnet (BPM) and induction motors using Motor-CAD.
Register now to attend our U.S. Motor-CAD users meeting and training course, taking place from 17th-21st September 2018 in Mason, Ohio
Motor Design Ltd are delighted to introduce Michael Rubbo, who will be supporting Motor-CAD users based in the U.S. as a Lead Applications Engineer.
To celebrate everything the INWED 2018 campaign is doing to raise the profile of women in engineering and inspire future engineers, we have been asking members of our team to talk to us about why they chose a career in engineering.
FIND OUT MORE...
The Motor-CAD software is distributed worldwide. Our carefully selected partners are experts in the use of the software and can provide support and training.
To find a distributor near you, click on the link below.