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The effects of the obliteration of portal venules (OPV) in cirrhotic portal hypertension are poorly understood. To investigate its contribution to portal hypertension in biliary cirrhosis and its underlying mechanism, we evaluated OPV using two‐dimensional (2D) histopathology in liver explants from patients with biliary atresia (BA, n = 63), primary biliary cholangitis (PBC, n = 18), and hepatitis...
The influences of current amplitudes on four-phase 24/18-pole doubly salient electro-magnetic motor(DSEM) under fault-tolerant operation are studied in this paper. Taking average output torque, output torque ripple and stator copper losses into consideration, the optimal fault-tolerant current amplitude (FTCA) range is obtained. A four-phase full-bridge converter with two bilateral switches is applied...
In order to achieve the integration of ac/dc output in the aircraft power system, a novel single-input/dual-output indirect matrix converter (IMC) is proposed in this paper. Based on the fact that a real dc-link is formed in IMC, the proposed topology realizes dc output by inserting a simple two transistor forward converter (TTFC) into the dc-link. Its modulation strategy is composed of two parts,...
Power converter open-circuit fault leads to reduction of motor output performance. Fault-tolerant control strategy, which is applied to power converter of four-phase doubly salient electro-magnetic motor (DSEM) drive, is investigated in this paper to improve the post-fault motor performance. A fault-tolerant topology is newly presented. It has the advantage of simple structure with only two bidirectional...
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