Modified Steinmetz Model Reference

Simcenter STAR-CCM+ calculates the losses using a modified Steinmetz formula, based on magnetic flux density calculations (see Eqn. (4344)). You can use the loss terms for thermal analysis.

Material Properties

Applies to solid materials.

Eddy-Current Loss Coefficient

The eddy-current loss coefficient $C_e$ in Eqn. (4344). The default value is 0.

Hysteresis Loss Coefficient

The hysteresis loss coefficient $C_h$ in Eqn. (4344). The default value is 0.

Steinmetz Coefficient A

$a$ in Eqn. (4344). The default value is 0.

Steinmetz Coefficient B

$b$ in Eqn. (4344). The default value is 0.

Modified Steinmetz Monitor

Parts

Specifies the input parts where you monitor the peak value and the average time derivative of the Modified Steinmetz monitor field function.

Enabled

Activates/deactivates the Modified Steinmetz monitor.

Field Function

Specifies the field function for which the peak value and the derivative are calculated. The associated maximum, minimum, peak, and time derivative field functions appear as read-only properties. Simcenter STAR-CCM+ sets the name of the associated field functions based on the specified function. See Field Functions.

Excitation Frequency

Specifies the excitation frequency $f$, as defined in Eqn. (4344), as a scalar profile.

Field Functions

Eddy-Current Loss Coefficient

Corresponds to the coefficient $C_e$ in Eqn. (4344).

Hysteresis Loss Coefficient

Corresponds to the coefficient $C_h$ in Eqn. (4344).

Modified Steinmetz Monitor Field Functions

The following field functions are associated with the Steinmetz monitor (see Modified Steinmetz Monitor). The name of these field functions change based on the field function that you specify for the Steinmetz monitor. As by default the field function specified for the monitor is the Magnetic Flux Density: Magnitude, the associated field functions are: Magnetic Flux Density: Magnitude Maximum, Magnetic Flux Density: Magnitude Minimum, Magnetic Flux Density: Magnitude Peak, Magnetic Flux Density: Magnitude Mean Square Time Derivative.

• [SteinmetzMonitorFF Maximum]—corresponds to the maximum value of the field function that you select for the Steinmetz monitor. See Eqn. (4345).
• [SteinmetzMonitorFF Minimum]—corresponds to the minimum value of the field function that you select for the Steinmetz monitor. See Eqn. (4345).
• [SteinmetzMonitorFF Peak]—corresponds to the peak of the field function that you select for the Steinmetz monitor. See Eqn. (4345).
• [SteinmetzMonitorFF Mean Square Time Derivative]—corresponds to the average time derivative of the field function that you select for the Steinmetz monitor. See Eqn. (4346).

The following field functions are also associated with the Steinmetz monitor. The name of these field functions change based on the monitor name. By default, the monitor name is Modified Steinmetz 1, so the default names are Modified Steinmetz 1 Eddy-Current Loss, Modified Steinmetz 1 Hysteresis Loss, and Modified Steinmetz 1 Total Loss.

• [SteinmetzMonitor Eddy-Current Loss]—corresponds to the losses by eddy-currents
• [SteinmetzMonitor Hysteresis Loss]—corresponds to the losses by hysteresis
• [SteinmetzMonitor Total Loss]—corresponds to the total core losses $W$

Steinmetz Coefficient A

Corresponds to the coefficient $a$ in Eqn. (4344).

Steinmetz Coefficient B

Corresponds to the coefficient $b$ in Eqn. (4344).

Steinmetz Coefficients Validity Range

The Steinmetz coefficients for the materials in the Electromagnetics material database derive from experimental data. The following tables provide information on the valid range of excitation frequencies for commonly referenced materials.