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To avoid surface abrasion while measuring the external diameter of the work piece with directly contact measurement, the eddy current sensor based non-contact on line measurement technique for the external cylindrical grinder is proposed. The experiment was carried out with different cylindrical work piece, some features including linearity, resolution and sensitivity were tested and the influence...
To increase the fault tolerance for cascaded H-bridge inverter, a novel powerful driver is introduced for H-bridge drive and protection. This driving-circuit could drive four high power IGBTs simultaneously, with slowly decreasing grid-voltage and softly turn-off based over-current protection, the H-bridge and cascaded system could be protected effectively. Characteristics of over-current protection...
To increase the fault tolerance for cascaded H-bridge inverter, a novel powerful driver is used for H-bridge drive and protection. This driving-circuit could drive four high power IGBTs simultaneously, with slowly decreasing grid-voltage and softly turn-off based short circuit protection. To obtain a balanced line to line voltage with the cell-fault inverter, neutral shift based control methods is...
To improve the output performance of cascaded H-bridge multilevel inverter under faulty conditions, this paper presents an optimized method suitable for harmonic cancellation while the faulty inverter are operated with neutral shift. With some parameters adjusted according to the fault type, the line to line voltages of the cell-fault inverter are increased than traditional control method, while keeping...
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