The paper analyses the commutation processes in polyphase brushless DC generators.

本文分析了多相无刷直流发电机的换向过程。

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While no official cause of the crash has been named, sources have told CNN that 150 of the oxygen generators -- improperly packed and stowed in the DC-9's cargo hold -- are believed to have ignited the fire that brought down the plane.

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The source of the fire has still not been pinpointed, but it was widely speculated that a group of oxygen generators in the cargo hold may have caused or contributed to a blaze in the cargo hold of the DC-9.

CNN: ValuJet back in the air at last - Sept. 26, 1996