The aim of this paper is to study the feasibility of fault detection and diagnosis in a three-phase inverter feeding an induction motor. The proposed approach is a sensor-based technique using the
A DC to 3-phase series-resonant converter with low Fundamentals of dc to 3-phase ac power conversion have been known for many decades. Because of the simplicity of control and the clarity of insight into the method of opera-tion, some of these systems, such as the load-commutated bridge inverter, the square-wave inverter, and the high-fre-quency pulsewidth-modulated inverter, are well developed
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Efficiency Analysis on a Two-Level Three-Phase Quasi For the two-stage inverter as shown in Fig. 1, the power loss caused by the reverse recovery of the diodes (e.g. the diode VDa1 of Boost DC-DC stage) is high, if the silicon diode is used . In order to achieve a good efficiency with low cost, a two-level three-phase quasi-soft-switching inverter was
three-port three-phase symmetrical transformer. The converter provides galvanic isolation and supports bidirectional power ow for all the three ports. An arbitrary power ow prole in the system can be achieved by phase shifting the three inverter stages. Thanks to the three-phase
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Phase Current Sensing Method Using Three Shunt Resistors Oct 28, 2020 · Phase current information is essential in ac motor drive systems for instantaneous torque control. The performance of current sensing techniques such as Hall-effect sensors, current transformers, Rogowski coils, and shunt resistors was reviewed in Ref. .Hall current sensors have been preferred for current measurement due to their high-accuracy and fully electrical isolation [1,2,3].
A three-phase inverter converts a DC input into a three-phase AC output. Its three arms are normally delayed by an angle of 120° so as to generate a three-phase AC supply. The inverter switches each has a ratio of 50% and switching occurs after every T/6 of the time T (60° angle interval). The switches S1 and S4, the switches S2 and S5 and switches S3 and S6 complement each other. The figure below shows a circuit for a three phase inverter.
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