Creating an FEM Model with JMAG (PM motor)
An FEM model needs to be created to meet the following requirements.
教师年度考核登记表个人总结l Three FEM coil conditions need to be specified.
The FEM model cannot be imported into JMAG-RT if there are more or less than three FEM coil conditions.
l A rotation motion condition needs to be specified.
l Select [Rotation] under [Type] in the [Motion] dialog box for JMAG-Studio.
Furthermore, lect [Constant] for [Method] under [Displacement].
l
Select [Constant Revolution Speed] in the [Rotation Motion] ttings for JMAG-
Designer. JMAG-RT us the FEM model ttings described above even if the ttings that are specified differ.
l The initial position of the rotor can be t to any position. JMAG-RT automatically
determines the position for the current pha at zero bad on the flux linkage calculation when creating a JMAG-RT model.
l A torque condition needs to be specified to create a simple spatial harmonics model or spatial harmonics model.
l Specify an electromagnetic force and torque calculation condition, and then lect the
[Calculate Torque] check box when creating an FEM model in JMAG-Studio.
l
Specify a torque condition, such as nodal force, Lorentz force, or surface force, when creating an FEM model in JMAG-Designer.
A torque condition is not required for an Ld, Lq model.
l The conversion factors for both the results and the circuit need to be specified if a partial model is ud.
l
Specify the conversion factors in the [Analysis Control] dialog box for JMAG-Studio. l Specify the conversion factors in the [Study Properties] dialog box for JMAG-Designer.
JMAG-RT us the results obtained from an FEM analysis as full model values.
The following should be noted.
l The FEM coil condition needs to be associated with an FEM coil component by creating a circuit in a standard FEM analysis, but a circuit and the FEM coil components do not need to be specified to u JMAG-RT.
页码，1/1Creating an FEM model with JMAG
Settings in the JMAG-RT Library Manager (PM motor)
Three types of JMAG-RT models can be created for a three-pha PM synchronous motor.
l[Ld,Lq Model]:
The Ld,Lq model has Ld/Lq current and a pha angle dependency. The effects of
harmonics due to the slots cannot be simulated becau only a sinusoidal component of electromotive force for the motor is ud to calculate Ld and Lq.
铁道车辆专业l[Simple Spatial Harmonic Model]:
The simple spatial harmonic model has inductance, torque with current, and a pha
angle dependency. The effects of harmonics due to the slots can be simulated. However, the inductance may not be accurate if the model has a very high magnetic saturation.
l[Spatial Harmonic Model]:
The spatial harmonic model has inductance, torque with current, and a pha angle
dependency. The effects of harmonics due to the slots can be simulated. The inductance can be obtained highly accurately even if the model has a very high magnetic saturation.
[Information] tab
The [Information] tab specifies the information about the JMAG-RT model.
l[Model Name]
l[Comment]
l[Directory]:
The JMAG-RT model data file (*.rtt) is exported to the directory indicated in this text box.
The HTML file (JCF file name.html) created when the JMAG-RT model data is created is exported to this directory with the model data. Furthermore, a "run" folder is created in this directory when a JMAG-RT model is created. The PLOT file, etc., of the FEM analysis is exported to the run directory.
[Create] tab
The [Create] tab specifies the parameters for the FEM analysis required to create a JMAG-RT model.
l[Motor Model]:
Changes the model type. Click [Change Model] to open the [Select Motor Model] dialog box. However, the model type cannot be changed once a JMAG-RT model has been
created.
l[Number of Poles]:
Specifies the number of poles for the motor.
l[Configuration of FEM Coil]:
l[U-Pha], [V-Pha], [W-Pha]:
Displays the FEM coil conditions t for the FEM model. Specify the condition is
associated with each pha. The motor rotates counterclockwi and the pha
difference between the three phas is defined relative to the U-pha. V-pha is
displaced by the electric angle of -120 degrees and the W-pha by +120 degrees.
l[Number of Turns]:
Specifies the number of turns for the coil.
我的物流l[Connection Pattern]:
Specifies [Y-connection] or [Delta-connection].
l[Resistance (ohm)]:
Specifies the pha resistance of the coil. The pha resistance of the coil is ud as the default value for the MagCoupler-RT PMSM Machine block in PSIM. [Resistance
玉米仁
(ohm)] is not ud for Simulink.
l[Current]:
Specifies the current including the current flowing while driving the motor. If the upper limit of current is not large enough, the effect of magnetic saturation may not be taken into account.
l Ld/Lq Model
l[Simple Settings]:
Specifies [Rated Current (A)] and [Current Pha Range (deg)]. The point
quence of the current is automatically defined from the specified rated current
and current pha range. The JMAG-RT model that is created has a range of
current between 0 A and three times the specified rated current. Seven data points
are specified for the current. The current pha has data points every 10 degrees
for the specified range and every 45 degrees beyond that range.
l[Advanced Settings]:
Specifies the [Amplitude (A)] and [Current Pha (deg)]. Select [Advanced
Settings], and then click [Setting]. The [Advanced Settings of Current] dialog box
is displayed. Click [Point Sequence] for each item to open the [Current Point
Sequence] or [Current Pha Point Sequence] dialog boxes, and then specify the
point quence for the current and the current pha. The [Create Point Sequence]
dialog box is displayed by clicking [Create Point Sequence] in the [Current Point
Sequence] dialog box. Specify [Min], [Max], and [Division], and then click [OK].
The point quence that is created is displayed in each point quence dialog box.
If the current exceeds the specified range when using the JMAG-RT model in a circuit/control simulator, the inductance and torque values obtained at the maximum or minimum current are applied to the model instead of extrapolating the data
points.
l Simple Spatial Harmonics Model
l[Drive Type]:
Specifies the current waveform for the JMAG-RT model. The JMAG-RT model
contains the rotation angle and current dependent, inductance, and torque data.
The time required to create a JMAG-RT model varies depending on the current
waveform pattern. Select the type of current waveform of the motor to drive in the circuit/control simulator according to whether the motor has a sinusoidal or non-
sinusoidal current waveform. Furthermore, specify the current using [Simple
Settings] or [Advanced Settings].
l[Sine Wave Drive] and [Simple Settings]:
梦星堂Specify [Sine Wave Drive] for a current applied to the motor that has a
sinusoidal waveform, and then specify [Rated Current (A)] and [Current Pha
Range (deg)]. The point quence is t automatically bad on the [Rated
Current (A)] and [Current Pha Range (deg)] ttings. The JMAG-RT model
that is created has a range of current between 0 A and three times the
specified rated current. Seven data points are specified for the current. The
current pha has data points every 10 degrees for the specified range and
every 45 degrees beyond that range.
l[Sine Wave Drive] and [Advanced Settings]:
pecifies the current amplitude of the inductance and torque and the current
pha angle dependency. Select [Advanced Settings], and then click [Setting].
The [Advanced Settings of Current] is displayed.
The [Amplitude (A)] point quence and [Mechanical Angle Resolution (deg)] is
specified for the inductance.
The [Amplitude (A)] point quence, the [Current Pha (deg)] point quence,
and [Mechanical Angle Resolution (deg)] and [Periodic Angle (deg)] of the
torque ripple are specified for torque. If the periodicity of torque ripple can be
determined from the number of poles, lect the [Calculate Rotation Angle
from the Number of Poles] check box. The angle per period is automatically
calculated.
l[Other] and [Simple Settings]:
Specify [Other] when the current waveform is not sinusoidal. The current
values of all the possible combinations specified for each rotation angle are
applied to each coil. The JMAG-RT model contains the data for the current
values. Specify only [Rated Current (A)]. The JMAG-RT model that is created
has a range of current between 0 A and three times the specified rated current.
Seven data points are specified for the current.
l[Other] and [Advanced Settings]:
specifies the amplitude and pha angle dependency, inductance, and torque
data. Select [Advanced Settings], and then click [Setting]. The [Advanced
Settings of Current] dialog box is displayed.
The [Amplitude (A)] point quence and [Mechanical Angle Resolution (deg)]
are specified for the inductance.
The [Amplitude (A)] point quence, [Mechanical Angle Resolution (deg)], and
[Periodic Angle (deg)] are specified for the torque. If the periodicity of torque
ripple can be determined from the number of poles, lect the [Calculate
三八节文案Rotation Angle from the Number of Poles] check box. The angle per period is
automatically calculated.
l Spatial Harmonics Model
l[Sine Wave Drive] and [Simple Settings]:
The ttings are the same as tho for the simple spatial harmonic model.
l[Sine Wave Drive] and [Advanced Settings]:
specifies the amplitude and pha angle dependency, inductance, and torque data.
Select [Advanced Settings], and then click [Setting]. The [Advanced Settings of
Current] dialog box is displayed.
The [Amplitude (A)] point quence and [Mechanical Angle Resolution (deg)] are
specified for the inductance. If the angle dependency of the inductance for each
pha has a periodicity of 1/2 electric period, lect the [1/2 Electric Angle with
Periodicity] check box. The calculation time to create a JMAG-RT model is reduced.
The [Amplitude (A)] point quence, [Current Pha (deg)] point quence,
[Mechanical Angle Resolution (deg)], and [Periodic Angle (deg)] are specified for
the torque. If the same data points can be defined for both inductance and torque,
lect the [U the Same Value for Inductance and Torque] check box. The
calculation time to create a JMAG-RT model is reduced. If the periodicity of torque
ripple can be determined from the number of poles, lect the [Calculate Rotation
Angle from the Number of Poles] check box. The angle per period is automatically
calculated.
l[Other] and [Simple Settings]:
The ttings are the same as tho for the simple spatial harmonic model.
l[Other] and [Advanced Settings]:
Specifies the amplitude and pha angle dependency, inductance, and torque data.
Select [Advanced Settings], and then click [Setting]. The [Advanced Settings for
Current] dialog box is displayed.
The [Amplitude (A)] point quence, [Mechanical Angle Resolution (deg)], and
[Periodic Angle (deg)] are specified for the torque. If the same data points can be
defined for both inductance and torque, lect the [U the Same Value for
Inductance and Torque] check box. The calculation time to create a JMAG-RT
model is reduced. If the periodicity of torque ripple can be determined from the
number of poles, lect the [Calculate Rotation Angle from the Number of Poles]
check box. The angle per period is automatically calculated.
l[Equation of Motion (PSIM only)]:
Specifies the moment of inertia and time constant for a JMAG-RT model to u in a PSIM control/circuit simulator. The values are ud as default values in the MagCoupler RT PMSM Machine block.
The JMAG-RT model created for Simulink contains the values, but the ttings cannot be ud in Simulink. The parameters need to be specified again in Simulink.
A correction coefficient can be applied to the moment of inertia. The correction coefficient is as follows.
三宝四口l [Inertia Moment J0 (kg*m^2)]:
Specify the inertia moment.
l The value specified for [Inertia Moment for Target Region J1] in the [Equation of
Motion] dialog box for JMAG-Studio is displayed by default.
l
The value specified for [Inertia J1] in the [Define Equation of Motion] dialog box
for JMAG-Designer is displayed by default.
l [Inertia Moment Correction Coefficient (coef_inertia 1)]:
Specifies a correction coefficient for the inertia moment.
l The value specified for [Coefficient p] in the [Equation of Motion] dialog box for
JMAG-Studio is displayed by default.
l
The value specified for [Inertia Coefficient, p] in the [Define Equation of Motion]
dialog box in JMAG-Designer is displayed by default. l [Inertia Moment Correction Coefficient (coef_inertia 2)]:
Specifies a correction coefficient for the inertia moment.
l The value specified for [Correction Value J2] in the [Equation of Motion] dialog
box for JMAG-Studio is displayed by default.
l
The value specified for [Correction Value J2] in the [Define Equation of Motion]
dialog box for JMAG-Designer is displayed by default. l [Time Constant (c)]:
Specifies a time constant.
l [Distributed Calculation]:
Select the [U Distributed Calculation] check box when distributing the calculation to multiple machines on the same network using JMAG-RT, and then lect the CPU group to u for the calculation from the [CPU Group Name] list.
l [Calculation Mode]:
Specifies the type of calculation to re-calculate the data that has already been calculated from the following.
l [Recalculate Only Failed Cas]:
Re-calculates only the failed cas.
The JMAG-RT model data file (*.rtt) cannot be exported until after all the cas of an analysis have been completed in JMAG-RT. The calculation time is reduced by
calculating only the failed cas.
When re-calculating the failed cas, make sure to change the run directory in which the PLOT file of the FEM analysis is saved. The run folder can be created in the model directory of the [Information] tab.
l [Redo All Calculations]:
Re-calculates all of the cas even if there is only one ca that fails. If there are
parameters that cannot be added to a JMAG-RT model data file (*.rtt), all the cas
need to be re-calculated.
l
[Recalculate with Incread Resolution]:
Calculates only the cas that are added and adds the results to the existing JMAG
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