Zhixun Ma

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Introduction At the Lawrence Berkeley National Laboratory (LBNL), there are approximately sixty laboratories where unbound engineered nanoparticles (UNP) are used. 1 Each of these laboratories will need to be evaluated for worker exposures and environmental releases of UNP. To obtain information regarding potential releases of UNP, LBNL retained RJ Lee(More)
—Surface-mounted permanent magnet synchronous machine with concentrated windings (cwSPMSM) is a high-performance drive machine and has been adopted in many applications. The difficulty of implementing its sensorless control at low and zero speeds is its multiple saliencies, which is much more significant than most other ac machines. The traditional(More)
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