[SBOML-001] ∇-IPM

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Model Data
Designer Data

[Designer Data] is available in JMAG-Designer Ver. 25.1 or later.

Features and principal use

Model Diagram

Nabla-shaped IPM Motors for e-Axles
Compare models with various sizes and pole/slot combinations.

  • Number of Poles / Number of Slots（6p54s, 8p48s, 10p12s）
  • Outside Diameter（200, 250, 300mm)

Design Variables

Design Variables
HEIGHT (150-300)mm
NUM_TURNS 4,5,6
#1 MAG2_MAJOR_D *
#2 MAG_ORIGIN_DISTANCE *
#3 MAG_2_V_AMGLE *
#4 MAG_MAJOR_D *
#5 ODISTANCE_2 *
*Design variables differ according to model

Target, Constraints

Target

Max. Torque MaxTorque_High Maxmise
Magnet Volume MagnetVolume Minimise

Constraints

Max. Torque MaxTorque_High >= 300 Nm
Max. Rotational Speed MaxSpeed_High >= 10,000 rpm
Wire Current Density CurrentDensity (MaxTorq) <= 25 A/mm2
Max. Mieses stress (10,000 rpm) MiesesStress <= 300MPa

Surrogate Model

Training Datasets

The training datasets used to create each surrogate model consist of 50,000 analysis cases.

Surrogate Model Accuracy（6p54s 200mm）

Surrogate Model Accuracy（6p54s 200mm）

Surrogate Model Accuracy（6p54s 250mm）

Surrogate Model Accuracy（6p54s 250mm）

Surrogate Model Accuracy（6p54s 300mm）

Surrogate Model Accuracy（6p54s 300mm）

Surrogate Model Accuracy（8p48s 200mm）

Surrogate Model Accuracy（8p48s 200mm）

Surrogate Model Accuracy（8p48s 250mm）

Surrogate Model Accuracy（8p48s 250mm）

Surrogate Model Accuracy（8p48s 300mm）

Surrogate Model Accuracy（8p48s 300mm）

Surrogate Model Accuracy（10p12s 200mm）

Surrogate Model Accuracy（10p12s 200mm）

Surrogate Model Accuracy（10p12s 250mm）

Surrogate Model Accuracy（10p12s 250mm）

Surrogate Model Accuracy（10p12s 300mm）

Surrogate Model Accuracy（10p12s 300mm）

Surrogate Model Accuracy：Coefficient of Determination (R2)

6p54s 8p48s 10p12s
Φ200 Φ250 Φ300 Φ200 Φ250 Φ300 Φ200 Φ250 Φ300
Magnet Volume MagnetVolume 0.9999 0.9999 0.9999 0.9997 0.9999 0.9999 0.9999 0.9999 0.9999
Max. output MaxOutputPower_High 0.9958 0.9966 0.9972 0.9957 0.9969 0.9967 0.9948 0.9958 0.9965
MaxOutputPower_Middle 0.9975 0.9979 0.9972 0.9973 0.9967 0.9965 0.9967 0.9967 0.9966
MaxOutputPower_Low 0.9947 0.9959 0.9947 0.9961 0.9969 0.9966 0.9965 0.9965 0.9967
Max. Torque MaxTorque_High 0.9979 0.9984 0.9982 0.9974 0.9982 0.9977 0.9975 0.9975 0.9981
MaxTorque_Middle 0.9982 0.9985 0.9984 0.9975 0.9982 0.9976 0.9975 0.9975 0.9977
MaxTorque_Low 0.998 0.9986 0.9984 0.9972 0.9981 0.9975 0.9972 0.9972 0.9971
Current Density CurrentDensity (MaxTorq) 0.9999 0.9978 0.9999 0.9931 0.9999 0.9999 0.9999 0.9999 0.9999
Stress MisesStress 0.7285 0.8442 0.904 0.6149 0.7916 0.8834 0.7992 0.7992 0.8828