Analysis of an IPMSM Hybrid Magnetic Equivalent Circuit

The most common type of electric vehicle traction motor is the interior permanent magnet synchronous motor (IPMSM). For IPMSM designs, engineers make use of the magnetic equivalent circuit method, which is a lumped constant circuit method, and the finite element method, which is a distributed constant circuit method. The magnetic equivalent circuit method is useful for simple design through fast and intuitive parameters, but it cannot derive the distribution of the magnetic field. The finite element method can derive an accurate magnetic field distribution, but it takes a long time and is difficult to use for analysis of intuitive design parameters. In this study, the magnetic equivalent circuit method and Carter’s coefficient were combined for rotor structure design and accurate identification and analysis of circuit constants. In this paper, this design method is called the hybrid magnetic equivalent circuit method. Intuitive design parameters are derived through this hybrid magnetic equivalent circuit method. The air gap flux density distribution according to rotor shape, no-load-induced voltage, and cogging torque was analyzed and compared to results of the finite element method. The proposed method was found to achieve a short solving time and acceptably accurate results.

Visual Comparison of Phylogenetic Trees Through iPhyloC, a New Interactive Web-based Framework

Current side-by-side phylogenetic trees comparison frameworks face two issues: (1) accepting binary trees as input, and (2) assuming input trees having identical or highly overlapping taxa. We present a task abstraction of the problem of side-by-side comparison of two phylogenetic trees and propose a set-based measure for detailed structural comparison between two phylogenetic trees, which can be non-binary and not highly overlapping. iPhyloC is an interactive web-based framework including automatic identification of the common taxa in both trees, comparing input trees in several modes, intuitive design, high usability, scalability to large trees, and cross-platform support. iPhyloC was tested in hypothetical and real biological examples.

Using Mixed Reality (MR) to Improve On-Site Design Experience in Community Planning

In recent years, designing in existing environments has been consistently emphasized in community planning. However, practicing such on-site design is not easy for designers, because the current technical conditions do not allow virtual design objects into real environments for 3D visualization and interaction. Thus, designers’ intuitive design perceptions, accurate design judgments, and convenient design decisions are hardly supported. This paper explores the possibilities of using mixed reality (MR) technology to improve designers’ on-site design experiences in community planning. For this, we introduced an MR design support system (MR-DSS) for the interactive on-site 3D visualization of virtual design objects. With the MR-DSS, we performed a design experiment with sixteen participants in a typical on-site design scene of community planning. The results showed that the MR technology could provide designers with intuitive design perceptions, accurate design judgments, and convenient design decisions, thus effectively improving their on-site design experiences.

Non-stackable molecules assemble into porous crystals displaying concerted cavity-changing motions

With small molecules, it is not easy to create large void spaces. Flat aromatics stack tightly, while flexible chains fold to fill the cavities. As an intuitive design to make...

Methanol fuel production from solar-assisted supercritical water gasification of algae: A techno-economic annual optimisation

Methanol synthesis offers a relatively fast transient response compared to other fuel synthesis technologies—a promising downstream alternative for solar-derived syngas. However, many non-intuitive design choices must be analysed to achieve...

What is it like to see a bat?

The article outlines the main strands of design research into means-based and end-based inquiry. It examines problems with design research on the appearances of objects which are qualitative and psychological. A tentative outline is made about the core of design and how designers approach aesthetic judgements during design. The distinction between intuitive design and process-based design is made before exploring a question posed by Hillier (1998) concerning design´s relation to processes and form. Finally, a case is made for an art-criticism approach to design research.

Intuitive design: framing a software test system as a status reporting tool for business

Purpose This paper aims to present a conceptual framework of how software teams can leverage the implicit information of implemented acceptance tests to cater to the needs of decision makers. The research questions on this framework were how business stakeholders can receive project status information in an intuitive way and how this framework can guarantee the traceability of tests to requirements. Design/methodology/approach The conceptual framework delineates the design of an acceptance test framework in three aspects: how the requirements model reflects the evolving states of requirement maturity over a project, how the acceptance test model becomes synchronized with the requirements model without a traceability matrix and how the acceptance test model communicates business value to the decision makers. Findings In an industrial case study, the presented framework yielded the positive effects of intuitive understanding by business stakeholders, high test coverage of requirements and distinctly reduced manual quality assurance (QA) work by automated testing for browsers and mobile devices. Practical implications The presented framework can help to convince business stakeholders to approve the budget for building a testing framework because it delivers them value as a status reporting tool. Originality/value This paper is the first to describe a step-by-step approach to solving a critical problem that IT departments frequently face. The solution consists in a new way of transforming the perception of a technical framework into a reporting tool for business information by intuitive design. The idea of mapping hierarchically corresponding abstraction layers can be transferred to other engineering domains.