Goodyschle A (1), a new butenolide, was isolated from the whole grass of Goodyera schlechtendaliana, an orchidaceous edible medicinal plant. The structure of the new compound was elucidated by 1D and 2D NMR experiments in addition to HRESIMS analyses. Compound 1 was evaluated for its bioactivities including cytotoxic activity against human gastric cancer (SGC-7901) and human hepatocellular carcinoma (HepG2) cell lines, inhibitory activity on acetylcholinesterase (AChE) and butyrylcholinesterase (BChE), and DPPH radical scavenging activity. As a result, compound 1 showed potent BChE inhibitory activity (IC 50 value = 6.88 ± 1.63 μM), moderate DPPH radical scavenging activity (IC 50 value = 16.25 ± 0.21 μM), and

Abstract. This paper presents the design and performance analysis of a 60kW Interior PM (IPM) synchronous motor used as traction drive in a medium commercial electric vehicle (EV). The 2D time-stepping finite element method (TS-FEM) simulation model of the IPM motor is built by using 2D Maxwell software. The geometric structures of the IPM motor are optimized, and the operational performances of the IPM motor running at full speed range are investigated. Finally, the experimental platform of the prototype motor and its controlling system are set up. The performance comparison of the experimental results and simulation results of the IPM motor running in various operating mode are reported. All the results show that the designed IPM motor can match all requirements of the medium commercial electric vehicle driving applications.

In order to improve the utilization of PM in electric machine, this paper focus on the performance analysis of a coreless axial-flux PM machine with four types of Halbach PM arrangement. A 3-D FEM model is built and the flux distribution, electromotive force waveforms, output torque, core losses, and efficiency of the four types of Halbach PM arrangement machines have been investigated.

This paper presents flux modulation permanent magnet machines with four topologies, which have incorporated the magnetic gear structure and a stator within one machine. Four types of flux modulation permanent magnet machines are compared quantitatively. According to the location of the four structures, the four proposed machines are referred as motor I, motor II, motor III, and motor IV. This paper focuses on the performance comparative analysis of the four proposed machines by using finite element method (FEM). The output electromagnetic torque, induced voltage, cogging torque and efficiency of the four proposed machines have been investigated.