サイエンスソリューションズ List of Products and Services

This document presents examples of electromagnetic field analysis focused on permanent magnet synchronous motors. 【No-load Analysis】 - Cogging torque waveform - Induced voltage (back electromotive force) waveform 【Load Analysis】 - Explanation of rotating magnetic field using magnetic flux line diagrams - Torque waveform at rated current - Current-torque characteristics - Current phase angle-torque characteristics 【Coupled Analysis / Parametric Analysis】 - Current waveform - Speed-torque characteristics and efficiency map We also explain what can be understood from these results and how they can be useful for design and other purposes. If you are interested in electromagnetic field analysis of permanent magnet synchronous motors, please take a look. *For more details, please refer to the PDF document or feel free to contact us.

• Magnetic field analysis/electromagnetic wave analysis
• simulator
• PM motor

At Science Solutions Co., Ltd., we offer the "Motor Behavior Model" as a nonlinear motor model for 1D simulations. This document provides an easy-to-understand introduction to the behavior model, covering how to utilize it in evaluating motor drive systems and the simulation procedures. [Contents] ■ Introduction to EMSolution and its application products ■ What is the Motor Behavior Model? ■ What can it do? ■ Flow of analysis and implementation ■ Future collaboration and expansion plans ■ Introduction of various services The Motor Behavior Model from Science Solutions Co., Ltd. can achieve results much faster compared to conventional finite element method coupled analyses. For more details, please watch the video.

• Magnetic field analysis/electromagnetic wave analysis
• PM motor
• DC Motor

At SSIL, we have developed a method for evaluating the AC resistance of Litz wire coils using the "New Eddy Current Equivalent Circuit Method" (hereafter referred to as the CLN method). This method allows for the efficient and practical evaluation of the AC resistance of Litz wire coils. This document provides an overview of the method, so please refer to it. Our company offers analyses using the CLN method, including the evaluation of AC resistance for Litz wire coils. If you are interested, please feel free to contact us. *At SSIL, we enter into confidentiality agreements with our clients and manage confidential information in accordance with established procedures.

• Magnetic field analysis/electromagnetic wave analysis
• Analysis Services
• simulator

At Science Solutions, we support our customers' challenges during development, commercialization, and product troubleshooting through electromagnetic field analysis technology services. 【Examples of Customer Challenges】 - Cannot be analyzed with existing software - Want to efficiently set up when introducing software - Need analysis results immediately - Lack of engineers; no expertise in electromagnetic field analysis - Infrequent analysis makes software maintenance difficult 【Technical Services Leveraging Our Strengths】 - Ability to handle difficult analyses thanks to our specialists in electromagnetic field analysis - Function development and customization possible because we develop solvers - Ability to respond to short-term analysis using our unique analysis technology and more 【Contact Information】 ●TEL: 03-3711-8900 ●E-mail: em_solution@ssil.co.jp

• Analysis Services
• Contract Analysis
• Magnetic field analysis/electromagnetic wave analysis

The eddy current equivalent circuit method (hereinafter referred to as the CLN method) is a technique that represents the eddy current field using an equivalent circuit (ladder circuit), significantly reducing the computational load. Our company has developed a method that allows for the evaluation of Ritz wires, which have been difficult to analyze using the finite element method due to the complexity of their system, by applying the CLN method in a realistic timeframe. In this method, the Ritz wire is first homogenized, and then the AC loss is determined through AC analysis using the finite element method. By employing the Biot-Savart CLN method for the homogenization calculation, it eliminates the need to create a mesh for the air region of the analysis model. Additionally, by using an automatic mesh generation tool, the burden of mesh creation is significantly reduced. 【Features】 - Homogenization calculation of Ritz wires using the Biot-Savart CLN method - Evaluation of AC loss through AC analysis of the finite element method using the results of homogenization - No need to create a mesh for the air region in the Biot-Savart CLN method - Automation of mesh creation (up to 4-strand twisting) *For more details, please refer to the PDF document or feel free to contact us.

• Contract Analysis
• Analysis Services
• Magnetic field analysis/electromagnetic wave analysis

This document presents the features of EMSolution using the two-dimensional analysis of "induction motors" as an example. It provides a detailed explanation of the application of the sliding method in AC steady-state analysis, as well as transient analysis using the results of AC analysis as initial values. [Contents] ■ Application of the sliding method in AC steady-state analysis ■ Transient analysis using the results of AC analysis as initial values ■ Usage - AC steady-state analysis using the sliding method - Analysis using AC steady-state analysis as initial values *For more details, please refer to the PDF document or feel free to contact us.

• Magnetic field analysis/electromagnetic wave analysis
• Generators and transmission motors
• Analysis Services

This document presents a case study on the analysis of "transformers." It provides a detailed explanation of transformer analysis, as well as load analysis results. 【Contents】 ■Introduction ■Transformer Analysis ・Fig.1 Transformer Finite Element Mesh: 1/4 Model and COIL ・Fig.2 No-load Analysis Electrical Circuit ・Fig.3 No-load Analysis Primary Current Waveform ・Fig.4 No-load Analysis Secondary Voltage Waveform ・Table 1 No-load Analysis Results ・Table 2 Load Analysis Results, etc. *For more details, please refer to the PDF document or feel free to contact us.

• Magnetic field analysis/electromagnetic wave analysis
• Contract Analysis
• Analysis Services

This document presents a case study on the analysis of a "plunger." As a simple example of electromagnetic field analysis coupled with motion and external circuit systems, it provides a detailed explanation of the analysis of a plunger model using graphs and figures. [Contents] ■ Plunger - Fig.1 Plunger analysis model - Fig.2 Motion of the movable element and distribution of eddy current density (A/m²) - Fig.3 Change in magnetic flux - Fig.4 Fluctuation of the movable element's vertical position - Fig.5 Change in current within the circuit - Fig.6 Variation of electromagnetic force acting on the movable element *For more details, please refer to the PDF document or feel free to contact us.

• Magnetic field analysis/electromagnetic wave analysis
• Analysis Services
• Contract Analysis

This document presents a case study on the analysis of "servo motors." It provides a detailed explanation of the impact load analysis of a DC brushless servo motor using circuit diagrams and figures. [Contents] ■ Impact load analysis of DC brushless servo motors - Fig.1 Analysis model and mesh - Fig.2 Rotor rotational speed - Fig.6 PSIM circuit diagram - Fig.7 Motion equation equivalent circuit diagram - Fig.12 Coil current waveform - Fig.13 Terminal voltage waveform, etc. *For more details, please refer to the PDF document or feel free to contact us.

• Magnetic field analysis/electromagnetic wave analysis
• Analysis Services
• Servo motor

This document covers "Coupled Analysis with MATLAB/Simulink." It provides a detailed explanation of the coupled analysis methods, including examples of the plunger model. 【Contents】 ■ Introduction ■ Coupled Analysis Methods ・ Coupling of Electrical Circuit Systems ・ Coupling of Motion Equations ■ Analysis Examples ・ Plunger Model ・ Analysis of Brushless Servo Motors ■ Conclusion ■ Usage *For more details, please refer to the PDF document or feel free to contact us.

• Magnetic field analysis/electromagnetic wave analysis
• Analysis Services
• simulator

This document introduces our contracted analysis and development solutions in electromagnetic field analysis. In the development and design of electromagnetic devices, electromagnetic field analysis has become an essential technology. Properly setting the specific conditions for electromagnetic field analysis requires not only analytical skills to address the issues but also knowledge and experience regarding analysis methods. As your problem-solving partner, our company will work with you on unprecedented themes, from "clarifying fundamental issues" to "discussing the results obtained." [Features] ■ Solving analysis challenges that are difficult for other companies ■ Responding to short-term analysis needs such as failure analysis ■ Including development and customization in our services *For more details, please refer to the PDF document or feel free to contact us.

• Magnetic field analysis/electromagnetic wave analysis
• Contract Analysis
• Analysis Services

In recent years, the demand for higher efficiency has been increasing, and improving the accuracy of iron loss analysis in motors has become a key issue, with attention being drawn to iron loss analysis that takes hysteresis characteristics into account. This document will shift the perspective slightly and focus on the cogging torque of IPMSMs, explaining the comparison between analyses using the BH curve and those considering hysteresis characteristics. 【Content of the document (excerpt)】 - What is cogging torque analysis of IPMSMs? - Results of cogging torque analysis - Discussion results 【Benefits of conducting hysteresis analysis】 - It is expected to improve the accuracy of iron loss analysis, contributing to the higher efficiency of motors. - Improved accuracy of cogging torque is anticipated to lead to further reductions in noise and vibration. *This document can be viewed by downloading the PDF. Please feel free to contact us for more details.

• Magnetic field analysis/electromagnetic wave analysis
• Contract Analysis
• PM motor

Does dq-axis interference affect motor operation? As a standalone motor, it has characteristics that can be considered its individuality, generating torque in response to applied three-phase voltage and operating accordingly. Rather, the issue lies in how to determine the parameters of the control circuit that commands the operation. Generally, IPMSMs are controlled with d-axis and q-axis inductance and magnetic flux as constants in the dq-axis coordinate system. In cases like the D1 model, where there is a strong dependence on current and current phase angle, it may be challenging to decide which current value and current phase angle to use as control parameters. Care is needed when trying to operate efficiently or to control in a way that prevents irreversible demagnetization of the permanent magnets.

• Magnetic field analysis/electromagnetic wave analysis
• PM motor
• Analysis Services

The motor behavior model of Science Solutions Inc. uses parameters such as current amplitude and phase, allowing for the reproduction of nonlinear elements like magnetic saturation and spatial harmonics of the motor on control and circuit simulators. It can be utilized as a high-precision model for 1D simulation in model-based development. 【Features】 ■ High-precision nonlinear motor model ■ Integration with general-purpose simulators and fast analysis ■ Support for special motor models (multi-phase multi-winding motors) *For more details, please refer to the PDF document or feel free to contact us.

• Magnetic field analysis/electromagnetic wave analysis
• PM motor
• Brushless DC Motor

We are developing a method to analyze systems that include multi-turn coils, represented by the Ritz line, using a new eddy current equivalent circuit method (CLN method) for homogenization, which allows for analysis within a realistic computation time. The CLN method is a technique that represents the eddy current field with an equivalent circuit (ladder circuit), significantly reducing the computational load of eddy current analysis, and enabling time-domain simulations using the obtained equivalent circuit. This document introduces an overview of how to utilize this method for a non-contact power supply system. 【Analysis Flow】 ■ Cell analysis using the CLN method ■ Electromagnetic field analysis using homogenized coils ■ System characteristic evaluation through circuit simulation *For more details, please refer to the PDF document or feel free to contact us.

• Magnetic field analysis/electromagnetic wave analysis
• Contract Analysis
• Analysis Services

When an alternating current is applied to a Litz wire, it is known that the resistance increases with higher frequencies due to the skin effect and proximity effect, and this AC resistance can be determined through electromagnetic field analysis. This document introduces examples of calculating the AC resistance of a Litz wire twisted in two stages using EMSolution. By utilizing the periodic symmetry conditions available in EMSolution, it demonstrates that AC resistance calculations using a three-dimensional model of the Litz wire can be performed with low computational costs. **Benefits of calculating AC resistance through electromagnetic analysis:** - Frequency-dependent characteristics of AC resistance can be obtained before prototyping. - The quantitative impact of the number of strands and twist pitch on AC resistance can be understood. - The current distribution within the strands can be visualized. - A deeper understanding of the phenomena can be achieved. *For more details, please refer to the PDF document or feel free to contact us.*

• Magnetic field analysis/electromagnetic wave analysis
• Contract Analysis
• Analysis Services

This document introduces useful examples related to modeling in three-dimensional motor analysis, which is a specialty of the electromagnetic field analysis software "EMSolution." Electromagnetic field analysis (FEA) is a powerful tool for motor design and development. The usefulness of electromagnetic field analysis for motors includes the ability to understand the physical phenomena inside the motor, calculate motor current, voltage, torque, and eddy current losses in permanent magnets, among other things. [Contents] ■ Purpose and usefulness ■ Application details ■ Analysis examples ■ Analysis techniques that enable solutions ■ Summary *For more details, please refer to the PDF document or feel free to contact us.

• Magnetic field analysis/electromagnetic wave analysis
• Analysis Services
• PM motor

In a wireless power transfer system, the position of the receiving coil changes relative to the transmitting coil, so it is necessary to determine the transmission efficiency of the system at multiple relative positions. This document introduces a method for performing magnetic field analysis at each relative position using the sliding method within a single analytical model. By using the sliding method, it is possible to conduct analyses at multiple relative positions with minimal effort using a common analytical model. Additionally, when a full model is created, displacement in the Y direction is also possible. 【Contents】 ■ Purpose and usefulness ■ Application details ■ Analysis examples ■ Analytical techniques that enable solutions ■ Summary *For more details, please refer to the PDF document or feel free to contact us.

• Magnetic field analysis/electromagnetic wave analysis
• Contract Analysis
• Analysis Services

This document introduces a new eddy current equivalent circuit method (CLN equivalent circuit method) developed by our company. The CLN equivalent circuit method is a type of model order reduction, based on a new technique that utilizes the orthogonalization of predetermined functions, similar to the mode synthesis method. The conductor shape is represented by a mesh, but unlike conventional FEA, it determines the resistance and inductance of the ladder circuit by alternately performing static magnetic field and static electric field analyses. Additionally, by coupling the ladder circuit with electrical circuits and control circuits, it is possible to solve the eddy current field, including skin effect and proximity effect. 【Features】 ■ Equivalent circuits that include frequency dependence can be obtained in less computation time than conventional methods. ■ Not only frequency domain simulations but also time domain simulations are possible. ■ Conductors can be created using meshes and analyzed with FEA. ■ It is possible to achieve the same computational accuracy at a lower computational cost than conventional FEA circuit coupling analyses. *For more details, please refer to the PDF document or feel free to contact us.

• Magnetic field analysis/electromagnetic wave analysis
• Contract Analysis
• simulator

Electromagnetic field analysis (FEA) is a powerful tool for motor design and development, capable of considering magnetic saturation and dq-axis interference. Permanent magnet (PM) motors are typically driven by control circuits, and fast coupled analysis is required. At our company, we leverage the high speed and accuracy of EMSolution to create behavior models. By using behavior models based on FEA results, we can simulate behaviors equivalent to those of actual machines. Additionally, control coupled analysis often involves thousands to tens of thousands of steps, which can take several hours for direct coupled analysis with FEA. However, using behavior models reduces the computation time to just a few seconds. 【Features】 ■ Behavior model based on chain magnetic flux ■ Accurate reproduction of magnetic saturation, dq-axis interference, and slot harmonics ■ Enables fast analysis by using as motor elements in control circuit simulators like MATLAB/Simulink, or as nonlinear elements within control circuits *For more details, please refer to the PDF document or feel free to contact us.

• Magnetic field analysis/electromagnetic wave analysis
• PM motor
• simulator

When creating a magnetic field analysis model of a small transformer composed of coils made of laminated copper sheets, if the solid shape of the coil is automatically generated using a mesh creation tool, it results in flat elements that worsen the convergence characteristics. This document introduces a method for modeling the thin plate conductors in the coil section using shell elements for magnetic field analysis. It also explains case studies of magnetic field analysis for small transformers. [Contents] ■ Purpose and usefulness ■ Application details ■ Analysis case studies ■ Analysis techniques that enable solutions ■ Summary *For more details, please refer to the PDF document or feel free to contact us.

• Magnetic field analysis/electromagnetic wave analysis
• Contract Analysis
• Analysis Services

EMSolution-Lite is a budget version of EMSolution (electromagnetic field analysis) specifically designed for two-dimensional analysis. While the analysis model is limited to two dimensions, it allows users to utilize most of EMSolution's features (equivalent to the Professional package) for models with up to 100,000 elements. It was created in response to users' demands for an easy way to perform two-dimensional electromagnetic field analysis. For example, it can perform no-load analysis of PM motors as well as PWM voltage source analysis. Additionally, it can analyze the slip-torque characteristics of induction motors. Circuit and motion coupling analysis for electromagnets and actuators is also possible. We encourage you to use it for two-dimensional analysis and parameter surveys of motors, actuators, and more.

• Magnetic field analysis/electromagnetic wave analysis
• simulator

We have developed the parallel high-speed electromagnetic field analysis solver 'HPC-EMSolution' that "accelerates electromagnetic field analysis by 100 times and analyzes models 10 times larger." Its overwhelming speed and capability to handle large-scale models break the conventional wisdom of electromagnetic field analysis in electrical equipment design, leading to breakthroughs in product development and providing a competitive edge that overwhelms other companies. 【Features】 ■ Significantly reduces analysis time through parallel analysis ■ Enables analysis of large-scale models with tens of millions of elements ■ Improves analysis speed through parallelization ■ Available for immediate use with no initial investment *For more details, please refer to the PDF document or feel free to contact us.

• Magnetic field analysis/electromagnetic wave analysis
• simulator
• Analysis Services

EMSolution is an electromagnetic field analysis software that has introduced and improved the edge element finite element method since its early stages. In addition to the introduction of edge elements and the ICCG method, it has independently developed and implemented advanced analysis techniques such as the nodal force method and the sliding method, enabling large-scale and high-precision analyses to be performed quickly.

• Magnetic field analysis/electromagnetic wave analysis
• simulator