MANATEE software | e-NVH Variable Speed Solutions |
---|---|

Sub-module |
VAR.TR |

Function |
Transient variable speed e-NVH calculations |

Validation |
ALG_044 |

See also |
VAR.TR Transient variable speed e-NVH calculations VAR.MAP Torque / speed plane e-NVH calculations |

### Objectives

During electrical machine start-up, quick variations of electrical currents may occur and vibroacoustic calculations can no longer be calculated assuming steady state. This module of MANATEE software enables **e-NVH calculations in time domain with arbitrary rotor position waveform and current waveforms**.

### Description

The module calls MANATEE models in **full transient mode**, without assuming that steady state is reached at each speeds. Currents and rotor angle are therefore specified as time waveforms during whole run-up. All variable speed post processing of LAB.VS are then available, performing STFT instead of FFT. It is especially useful when coupling MANATEE to a Simulink control block.

### Technical details

Contrary to quasi static approach of VS.QS module, all the quantities are here assumed to be always varying and a Short Time Fast Fourier Transform is used.

### Graphical post-processing

The complete list of plot commands is available on MANATEE plot commands webpage. The following visualizations are more particularly related to this module: