Permanent magnet (PM) motor is the best choice in the application to a hybrid vehicle. PM configuration is one of the critical design points for the application. This paper presents the effect of PM shapes on the motor performance, especially sinusoidal induced voltage. The proposed design by finite element method has been confirmed by comparing emf wave form, harmonics, reluctance torque, and rated torque between conventional and models. Quantitative comparison of the characteristics for interior permanent magnet synchronous motor of four models is shown. The four models are lateral magnet, V-shape magnet, modified V-shape magnet, and C-shape magnet.

In this study, we developed the molded underfill (MUF) technology for system in package (SiP) module with fine pitch flip chip in RF application, in which two flip chips, LC filter, and additional passive components are integrated sideby-side. This study covered not only MUF reliability performance but also MUF design study focused on minimizing voids between flip chip bumps in the SiP module. The investigation comprises several aspects: A design study that present a printed circuit board (PCB) and epoxy molding compound (EMC) selection approach, air vent design of cavity vacuum molding, and results of void free from Design of Experiment (DOE) of several SiP module layouts. In the end, Scanning Acoustic Tomography (SAT) result of void, moisture sensitivity test, thermal cycle test and pressure cooker test had also been carried out for reliability evaluation. The test result shows that the optimized SiP module with fine flip pitch has a good reliability performance.