Electromagnetic calculations and simulations
Aanalytical insight as the main driver
Huygens Engineers performs the necessary calculations and simulations during the process of development and engineering. The share of calculation and simulation varies widely among projects. In some projects the share is 100%. We aim to keep analytical insight as the main driver for design, with subsequent confirmation through FEA.
Huygens Engineers delivers calculation and simulation services in the fields of mechanics, heat, fluid flow and electromagnetics. For electromagnetics, we have capabilities on the following subjects:
- Magnetic brake
- Reluctance motors and effect of moving electromagnets on toothed geometry
- Topology comparison for electromagnetic actuation
- Design of motors, actuators and generators
Magnetic brakes (or eddy current brakes) are widely used in several applications, such as in trains and fairground rides. They can be based on electromagnets for control of the braking force, or on permanent magnets for reliability.
Huygens Engineers used an eddy current brake, based on permanent magnets, to develop a low-cost brake for a system with a high space constraint and no possibility for active control of the brake force, while a constant brake force was required over a large range of speeds and temperatures. The figure and video below show magnetic flow fields in the brake.
There are several challenges in developing such a system, as the brake force generated by eddy currents is highly speed- and temperature dependent and the performance of the brake assembly can be sensitive to tolerances. Huygens Engineers used a combination of FEA in ANSYS to optimize the heat flow and ANSYS Maxwell to optimize the performance of the brake to make it less sensitive to building tolerances and speed variations. After the simulation stage, a prototype was built and measurements were performed on the design.