Release Overview

Version V2.2

On top of the existing features and modules for electrical engineers and mechanical engineers, Version 2.2 is now also specifically addressing acoustic engineers involved in the design of electrical systems:

Version V2.1

Additionally to the already existing features for electrical engineers, Version 2.1 also integrated those aiming at mechanical engineers involved in the design of electrical systems:

Version V2.0

Version V2.0 primarily aimed at electrical engineers, so they can evaluate the e-NVH performances of their electrical machine design. The main features included in Manatee software V2.0 has been:

Release History

  • Possibility to define SPMSM with uneven North/South pole.
  • Possibility to add additional magnetic materials in the airgap using “keys”, the same way it is possible to remove magnetic materials using notches
  • New/improved schematics for Slot, Notch and Hole
  • Improvements on DXF/Flux/Modal Basis import
  • Possibility to define a parameter sweep on magnet temperature
  • Rework of the ELUT GUI
  • Parameter sweep with incorrect design bug corrected
  • Quick vibration model of stators with a Beam Element Model more representative of tooth bending effects
  • Possibility to define Induced Voltage as a standard output (including for optimization)
  • Improvement of winding definition GUI (including new pattern plots)
  • Extension of Romax Force export to all skew types

New topologies

  •  Adding WRSM machines and fast workflow
  • Adding IPMSM machine with uneven North/South pole
  • Adding inclination angle for V-shape and zig-zag skew patterns
  • Extending DXF import possibilities (several layer winding and surface magnets)
  • Adding Uneven bore shape for IPMSM rotor
  • Improving machine definition process
  • Adding Oval ventilation duct



  • Adding Fixed speed simulation
  • Improving the MLUT point distribution for max-torque curves
  • Possibility to import external noise



  • Possibility to visualize lumped forces applied on the mechanical mesh, with frequency and wavenumber selection
  • Notches both on stator and rotor (including dxf shape)
  • Parameter sweep on notches (dimensions and placement)
  • Improve Modal Basis import (translation and rotation)
  • PWM harmonics in Magnetic Force Signature Analysis
  • New post-processing for load case contribution
  • Two new workflows have been added to simulate on-load SCIM. Both of them are Voltage driven and compute both stator and rotor current by using an enforced Electrical Equivalent Circuit.
  • Dedicated solution skew interface to automatically define a parameter sweep to find the optimal skew pattern (linear, step-skew, zig-zag, V-shape) with the best tradeoff between noise minimization and torque maximization.
  • Interface to visualize the operational forces (radial, tangential or both) on the external structure for each operating points. Including possibility to animate the forces.
  • Sound Pressure Level and Sound Quality metrics (Loudness, Sharpness, Roughness) are now available
  • Rework of the post-processing interface to provide new customization of the plots (overlay, axis selection, animation…)
  • Compute and Plot Sound Pressure Level
  • New Parameter Sweep design variables (Faults & Tolerances, coil pitch, machine external radius)
  • Preview of all the design before running a Parameter Sweep
  • Possibility to track harmonic amplitude in Parameter Sweep
  • Design Explorer
  • Overlay in plot
  • Compatibility with new slot DXF format
  • The Parameter Sweep of skew angle is now available
  • New options in plots
  • New icons
  • Simulation viewer corrected (bug on some screen)
  • Improvement of workflow descriptions
  • The Parameter Sweep feature was improved but is still in Beta Version (current priority of the development road map)
  • Various bug corrections and improvements
  • Handle ventilation ducts on symmetry axes
  • Unit MMF plot is now interactive
  • Added advanced simulation parameters (accessible in GUI)
  • Added advanced software parameters (accessible in GUI)
  • Better handle dxf import through FEMM conversion
  • Improved output management
  • Various bug corrections and improvements
  • Use periodicity with ventilation ducts
  • Improvements in slice handling + force computation
  • overall level in dB/dBA in order tracking plots
  • redesign of GUI for ventilation duct
  • Ansys modal basis import
  • Licensing related bugs
  • Outer rotor machine e-NVH simulation
  • Machine definition
  • Ansys Modal Basis import
  • Optimized magnetic force and noise and vibration calculation algorithms 
  • Additional plots on magnetic flux and forces 
  • Load / save optimization of heavy data used for calculation (Magnetic Look-Up Table, modal basis, Wave Frequency Response Function etc.) 
  • Global improvement of GUI and pictures rendering (since V2.1.3)
  • Rotor eccentricity modelling (parallel & inclined, static & dynamic)
  • Modal basis import from Altair Optistruct, including modal basis preview
  • Operational Deflection Shape (ODS) and Operational Force Shape (OFS) animations
  • NVH spectrogram per Load Case (spatiograms) for quicker troubleshooting
  • e-NVH calculation on the whole torque-speed plane based on current map
  • Update of Magnetic Force Signature Analysis feature with different colors per orders, improving harmonic origin description and export harmonic table as .txt
  • Easier set-up of e-machine (new winding definition algorithm using Star of Slots, optimization of DXF import, rework of rotor skew definition interface)
  • Possibility to model and simulate rotor skew to estimate the impact of axially varying forces on noise and vibration
  • Possibility to import rotor slots from dxf for interior PM rotors
  • Add WF5 to calculate airborne noise such as WF2 and WF4, with flux and forces directly calculated using FEA (more accurate than WF2 and WF4)
  • 2 new slot types of magnets for PMSM, to enable simulation of high speed SPMSM without shaft and iron
  • Enable dxf scaling to change unit
  • Button to reset view and reset selection in dxf import     
  • Add help text for dxf import
  • WF2 now automatically calculates MLUT of forces from analytical model (no need to calculate the MLUT of forces with WF1 anymore)
  • core at rotor side (only a cylindrical magnet) and spoke type PMSM
  • Preceding the simulation, a user interface to ease the definition of user’s own machine topology, among the two main machine types that are available: Permanent Magnet Synchronous Machines (PMSM) and Squirrel Cage Induction Machines (SCIM).
  • To set up the simulation, a user interface to choose between predefined workflows to get e-NVH performances with the best trade-off between computation and accuracy, according to on how far the user is in the design process.
  • Following the simulation, a user interface to perform automated e-NVH post-processings such as noise spectrograms and order tracking analysis.