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Along with the higher requirement of aircraft's generation system proposed, Integrated Starter Generator system appeared on the stage of history which can work as an electric motor and a generator at the same time. This paper talks about a Permanent Magnet Machine (PMM) which is applied as Integrated Starter Generator (ISG) used into the unmanned aerial vehicle (UAV). Permanent Magnet Machine has...
We report switching performance of perpendicularly magnetized Spin-Transfer Torque MRAM (STT-MRAM) devices with double tunnel barriers and two reference layers. We show that stacks with double tunnel barriers improve the switching efficiency (Eb/Ic0) by 2x, when compared to similar stacks with a single tunnel barrier. Switching efficiency up to 10 kBT/uA was observed in single devices. A large operating...
Spin Transfer Torque Magnetic Random Access Memory (MRAM) possesses a unique combination of high speed, high endurance, non-volatility, and small cell size. Among the emerging new memory technologies, including phase change memory, resistive random access memory, and conductive bridging random access memory, Spin Transfer Torque MRAM is the only candidate with the potential for unlimited endurance,...
An accurate knowledge of the air-gap magnetic field distribution is necessary for the design of PM torque motors. The two-dimensional air-gap magnetic of the surface-mounted permanent-magnet motor can be solved by the numerical method or the analytical method. The analytical method contributes to the optimization design and structural adjustment not only because its physical concept is instinct and...
This paper presents the performance investigation and design technology of Line Start-up Permanent Magnet Synchronous Motor(LSPMSM) with super premium efficiency, including design consideration and evaluation for motor starting-up, key performance, advanced finite element analysis(FEA) for the design, improvement and verification, prototype build and test, design and test data comparison to Premium®...
Induction motors are the workhorses of industry and represent nearly the entire installed base of constant-speed and most variable-speed motors. But the power factor and efficiency of induction motor are limited by its squirrel cage rotor. In the past, the colleagues all over the world tried to research and develop supper premium efficient electrical motor to replace the Premium® efficient induction...
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