Application Examples - Brushless DC motors - SPM

Application examples with Model Files available
Minimizing the cogging torque in a brushless DC motor
The predicted cogging torque in a brushless DC motor is compared between two different stator geometries: a straight stator and a skewed stator.

Cogging torque is undesirable because it introduces vibration and noise, and also makes precise positioning of the rotor impossible because the rotor tends to lock onto a position where it is aligned with the stator poles. By skewing the stator, the cogging torque can be significantly reduced.

MagNet makes it easy to set up multiple problems for solution at different rotor angles. And MagNet's Static 3D solver reports the magnetic forces and torques experienced by each body in the model, so it is easy to create a torque-angle curve.

Open Report (Model 0088)

Request MagNet model files - Model Number 0088

Application Examples - Brushless DC motors - SPM
Other application examples (report only)
Cogging torque in a skewed brushless DC motor
Brushless motor design with Simcenter Motorsolve
Simulating a Halbach cylinder servo motor
Reducing the eddy-current losses in permanent magnets by segmentation
Cogging torque in a skewed brushless DC motor
The predicted cogging torque in a brushless DC motor is compared between two different stator geometries: a straight stator and a skewed stator.

Cogging torque is undesirable because it introduces vibration and noise, and also makes precise positioning of the rotor impossible because the rotor tends to lock onto a position where it is aligned with the stator poles. By skewing the stator, the cogging torque can be significantly reduced.

Open Report (Model 0075)

Brushless motor design with Simcenter Motorsolve
MotorSolve is the most powerful and intuitive package for design and analysis for rotating electric machines. MotorSolve offers a new and enhanced user experience, a powerful geometry engine and windings editor, a simple results-driven post-processor and the capability to manage, compare and analyse multiple designs and generate reports with any combination of the dozens of graphs, values, plots and data that are available.

Open Report (Model 0142)

Simulating a Halbach cylinder servo motor
MagNet's magnetization pattern predicting capability is used to design a Halbach cylinder BLDC servo motor in this example. A four pole 12 slot, 3 phase machine is designed here including accurate modeling of an external, impulse magnetization of the Halbach cylinder. Presented below is the magnetizing fixture, the resulting magnetization pattern and performance of the servo motor.

Open Report (Model 0176)

Reducing the eddy-current losses in permanent magnets by segmentation
Permanent magnet machines are increasingly popular. When dealing with high speed applications, the eddy current losses will often cause deterioration of their magnetic properties and potentially risk thermal demagnetization.

Segmentation of the permanent magnets helps to reduce the eddy current losses and risk of damage. In this example, MagNet is used to investigate the effect of segmentation in a surface mounted permanent magnet machine.

Open Report (Model 0199)