magnetic flux density

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  • Permanent Magnets Maximum Operating Temperatures

Permanent Magnets Operating Temperatures

Permanent Magnets Operating Temperatures All Permanent Magnets experience variations in field strength (flux density) as the ambient temperature increases or decreases. How these variations in operating temperature influence magnetic strength depend on the type of magnetic material and the degree above or below ambient temperature in which they are expected to operate. The shape of [...]

  • Magnetic Theory and Design

Magnetic Theory and Design

Magnetic Theory and Design 1. Can you explain the difference between coercive force and intrinsic coercive force? The intrinsic coercive force is the coercivity of a magnet material in a closed circuit configuration. A closed circuit configuration means the magnet does not have any exposed poles. Some examples of a closed circuit configuration are a [...]

  • magnetic magnetization patterns

Magnetic Magnetization Patterns

Magnetic Magnetization Patterns Isotropic magnets, such as Bonded Nd-Fe-B, are unoriented and have no preferred direction; therefore it is possible to magnetize them in any direction. Almost all other materials are anisotropic and have a preferred direction of magnetization. They will exhibit the best magnetic properties when magnetized in the direction of the grain. Higher [...]

Magnetic Caculations

Magnetic Caculations - About Rules of Thumb and Quick Calculations 1. How are energy product and magnet strength related? Magnet strength needs to be defined. Magnet strength actually is a measure of total flux in the area of interest. If greater holding strength is desired, then more Br is needed, and since holding force is [...]

  • The construction of Modeling Eddy Current Losses in Permanent Magnet Motor

Modeling Eddy Current Losses in Permanent Magnet Motor

Modeling Eddy Current Losses in Permanent Magnet Motor Let’s begin with our model geometry. In this example, we have a 3D model of an 18-pole PM motor. To reduce computational efforts and capture the full 3D behavior of the motor, we use sector symmetry and axial mirror symmetry. You can see an animation of the [...]

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