# Post-processing quantities: rotation motion

## Introduction

This paragraph deals with physical quantities computed for rotating motion .

## Kinematic variables

The list of kinematic variables used for solving and the names of the corresponding Flux parameters are given in the table below; in this table MS indicates the concerned mechanical set.

Kinematic variable | Name | Unit |
---|---|---|

Angular position: | AngPos(MS) | degree |

Angular speed: | AngSpeed(MS) | degree/s |

Angular acceleration: | AngAcc(MS) | degree/s² |

## Physical quantities

The list of physical quantities computed in the post-processing module and the names of the corresponding Flux parameters are given in the table below; in this table MS indicates the concerned mechanical set.

Torque | Name | Unit | Explanation |
---|---|---|---|

Electromagnetic torque: | TorqueElecMag(MS) | N.m | |

Internal
system |
|||

Friction torque: | TorqueFrInt(MS) | N.m | |

Spring return torque: | TorqueSpInt(MS) | N.m | |

Inertia torque: | TorqueInInt(MS) | N.m | |

Resistant torque*: | TorqueReInt(MS) | N.m | or |

External
system |
|||

Friction torque: | TorqueFrExt(MS) | N.m | |

Spring return torque: | TorqueSpExt(MS) | N.m | |

Inertia torque: | TorqueInExt(MS) | N.m | |

Resistant torque *: | TorqueReExt(MS) | N.m | or |

- either the sum of the friction torque + the spring return torque
- or the resistant torque defined using a formula

## Reminder of the solved mechanical equation

The solved mechanical equation for rotating motion is:

where:

**J**is the moment of inertia:

- is the moment of inertia of the moving mechanical set itself (internal system)

- is the moment of inertia of the external load (external system)

- is the electromagnetic torque
- is the resistant torque:

- is the resistant torque acting on the moving mechanical set (internal system)
- is the resistant torque acting on the external load (external system)

## Important note

When there are symmetries or periodicities, the computed values of the torque correspond to the entire device.