Magnetic analyses calculate the magnetic field in devices such as:
Power generators | Magnetic tape/disk drives |
Transformers | Waveguides |
Solenoid actuators | Resonant cavities |
Electric motors | Connectors |
Magnetic imaging systems | Antenna radiation |
Video display device sensors | Filters |
Cyclotrons |
Typical quantities of interest in a magnetic analysis are:
Magnetic flux density | Power loss |
Magnetic field intensity | Flux leakage |
Magnetic forces and torques | S-parameters |
Impedance | Quality factor |
Inductance | Return loss |
Eddy currents | Eigenfrequencies |
Magnetic fields may exist as a result of an electric current, a permanent magnet, or an applied external field.
In general, parts/components of an electromagnetic analysis can be categorized by their electric and magnetic properties. Possible electric characteristics are:
No current exists in a body
Solid conductor, current, no eddy current effects (see Figure 1.3: Current-Fed Solid Conductor - Current Known, Figure 1.4: Voltage-Fed Solid Conductor - Voltage Known, and Figure 1.5: Circuit-Fed Solid Conductor)
Stranded conductor, no eddy current (see Figure 1.1: Current-Fed Stranded Source - Current Density Known and Figure 1.2: SOURC36 Current-fed Stranded Conductor)
Solid conductor, eddy current present (harmonic or transient analyses only)
Magnetic characteristics include:
Non-magnetic: typically air, copper, aluminum
Soft magnetic: typically iron or steel
Hard magnetic: typically samarium cobalt or Alnico
The use and combination of these electric and material properties is described in How Mechanical APDL Handles Magnetic Analysis.
The following low-frequency electromagnetic topics are available: