Flux-AMESim co-simulation: linear actuator

Conditions of operation

The studied device is a linear actuator.

It is characterized by:

  • a mobile part, with translating motion along an axis
  • a magnetic circuit, in which eddy currents are developed
  • a coil of the stranded conductor type, supplied from a voltage source

Description in Flux

The described device in Flux should observe the rules listed in the table below.

  • Dimension: 2D plan, 2D axis, Skew or 3D
  • Application: Magnetic Transient
  • Physical:
Mechanical

A mobile mechanical set:

  • of the translating motion along an axis type
  • kinematic of the imposed position type
Electrical

A coil supplied by a voltage source:

  • region of the stranded conductor type in the finite element domain, or a non meshed coil in the 3D applications
  • component of stranded conductor type in an electrical circuit, supplied from a voltage source
  • Solving: The solving scenario(s) in Flux will not be taken into account. It is the AMESim software that manages the time step of the simulation and imposes it to Flux during the co – simulation.
The Flux project should include:
  • No more than one mechanical set
  • No more than one coil
  • No more than one voltage source

Coupling component

To carry out a Flux-AMESim co-simulation, in Flux the user creates a coupling component (phase 1).

The coupling component facilitates the:

  • setting of the conditions for data exchanges
  • generation of the co-simulation Flux project (named F2A)

Conditions of exchange / linear actuator:

  • name of the mechanical set in translating motion
  • name of the voltage source
  • choice for the calculus of losses:
    • without losses / with losses
    • losses in the electrical circuit
    • electromagnetic losses
  • addition of supplementary parameters

The coupling component is created when the project is ready for solving (physics completely described).

Exchange of data (1)

The exchange of data is carried out by means of the predefined parameters as presented in the diagram below.

Exchange of data (2)

The I/O parameters predefined in Flux during the creation of the coupling component are given in detail in the table below.

The input parameters (in Flux) are I/O parameters of the multiphysical type. Their value is piloted by AMESim.

I/O parameters of multiphysical type
AMESIM_VOLTAGE Value of the voltage source voltage
AMESIM_POSITION Linear position of the mobile mechanical set
AMESIM_TEMPERATURE Operation temperature

The output parameters (of Flux) are I/O parameters defined by means of formulas.

I/O parameter of the formula type
FLUX_CURRENT Current in the electrical circuit I(NOM_SOURCE_TENSION)
FLUX_FORCE

Electromagnetic force

over the mobile part

 ForceElecMag(NOM_EM_MOBILE)
FLUX_LOSSES Losses in the electrical circuit, respectively the Joule losses in the stranded coils and in the resistors of the electrical circuit FLUX_LOSSES_COND_BOB + FLUX_LOSSES_RESISTANCE
Electromagnetic losses, respectively the Joule losses in the regions of solid conductor type, due to the eddy currents FLUX_LOSSES_DOMAIN