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Unbalanced grids introduce performance deterioration for the Vienna rectifier topology by producing twice fundamental frequency ripple in the dc-link voltage and input active/reactive power. A traditional control strategy is the input current tracking scheme, which can work under any unbalanced conditions, but it cannot eliminate the input power ripple and(More)
The simultaneous online estimation algorithm of rotor time constant and rotor speed for speed sensorless induction machine is proposed. With a small signal injected to the flux command, the method can accurately complete the online tuning of Tr over a wide range of speed estimation including the rated speed and the very low speed of 1Hz or even lower speeds(More)
A new silicon microstrip detector was designed by the CDF collaboration for the proposed high-luminosity operation of the Tevatron pp̄ collider (Run IIb). The detector is radiation-tolerant and will still be functional after exposure to particle fluences of 10 1-MeV equivalent neutrons=cm and radiation doses of 20MRad. The detector will maintain or exceed(More)
Open-loop constant voltage/frequency (v/f) adjustable speed drives (ASDs) can often experience undesirablesustained oscillations. Factors affecting these oscillation states include induction machine (IM) parameters, dead time,dc-link capacitor size, IM saturation, output voltage, carrier frequency, and IM speed. Many literatures have discussedthe(More)
The innermost layer (L00) of the Run IIa silicon detector of CDF was planned to be replaced for the high luminosity Tevatron upgrade of Run IIb. This new silicon layer (L0) is designed to be a radiation tolerant replacement for the otherwise very similar L00 from Run IIa. The data are read out via long, fine-pitch, low-mass cables allowing the hybrids with(More)
This paper begins by illustrating the issue of switch stresses on synchronous rectifiers (SRs) which happens during the hot plug-in and plug-out operation – turn on and off moment of the synchronous rectification in isolated non-regulated Dc-Dc converters, such as the single stage unregulated bus converter. Next, full analysis of the working principle of(More)
This paper proposes a new family of three-switch three-state single-phase Z-source inverters (TSTS-ZSIs) that can be classified into two groups, boost-based TSTS-ZSI and buck– boost-based TSTS-ZSI, according to the step-up circuit. All of the topologies have the merits of buck–boost capability and low voltage stress, and some of them have the feature of(More)