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Ansys Motor-CAD

In terms of the electrical machinery design process, after having the specification, it is followed by conceptual design, magnetic circuit detail design, structural heat transfer design analysis, and system analysis. Ansys offers comprehensive design and analysis solutions for all these procedures. The conceptual design solution is the Motor-CAD, a highly acclaimed and reliable software in the industry. Compared with Maxwell, which is a general electromagnetic field calculation tool, its electrical machinery design procedure is easier and simpler, and powerful functions and high precision are highly praised by the vast users. Motor-CAD has a more professional electrical machinery design procedure, which can calculate the electromagnetic and temperature faster for the electrical machinery. Uniquely, it takes the efficiency map and temperature curve of the driving conditions, allowing users to have an incomparable advantage in terms of the design solution and conceptual design.


Motor-CAD function modules

-Includes all typical radial flux machinery

-Integrated calculation of analytical and numerical solutions

-Form-type parametric design template

-Coupling with thermal model

-Can be quickly converted into Maxwell model

-Industry’s standardized tool for electrical machinery thermal analysis

-Calculates of steady-state and transient state electrical machinery temperature

- Natural cooling, fans, water channels, oil channels, and other cooling modules included

-Thermal resistance network modeling method

- Takes process-related parameters into consideration

- Calculation of efficiency and loss map

- Calculation of peak/rated power TN curve

- Applies MTPA control strategy to simulate the characteristics of electrical machinery with controller

- Vehicle parameter calculation and Driving Duty Cycle analysis

- Dynamic coupling calculations with the thermal model


- Strength analysis of rotor structure

- Finite element solver

- Allows import of DXF models
Motor-CAD is the only software that includes electromagnetic, structure, heat transfer, and dynamic characteristics (LAB) for the motor concept design stage, with fast calculation speed and a certain degree of accuracy. Usually, it is necessary to determine the size of the motor in the process of design as its size is directly related to heat dissipation. Even though with the same power, the sizes of the motors will be affected by their dissipation capacity. A direct example is that an air-cooled motor is usually bigger than a water-cooled motor. Generally, during the design, the size of the motor is estimated with the current density. However, this is just a reference as it is not easy to accurately estimate the actual size demand of the electrical machinery, especially for certain types of motor which had rated and maximum power requirements and requires the long-term and short-term ratings to be defined. Thus, if the short-term rating has different requirements, for instance, 2 minutes or 30 seconds, it will be difficult to estimate the size needed for the electrical machinery, so the size of the electrical machinery must stay undecided first until a verification or a detailed temperature analysis is done, then re-evaluated. The temperature analysis with Motor-CAD allows the designers to determine the accurate heat transfer requirements in a short time. The dynamic temperature increase results under different operative circumstances can even be learned right in the LAB.
Product features

  • Electrical machinery design tools
  • Includes a pre-defined electrical machinery template and design process
  • Transient magnetic field and magnetostatics field solver
  • Integration of 2D finite element and magnetic circuit method
  • Excitation current
  • Fault analysis: three-phase or two-phase short circuit
  • Fast calculation time
  • Map diagram that takes the efficiency of driving conditions into consideration
  • Calculation of temperature-related efficiency map
  • Coupled with Motor-CAD thermal analysis to calculate electromagnetic and thermal performance
  • Temperature curve that takes driving conditions into consideration