NDLI: Excitation circuits for ignitron rectifiers

Content Provider	IEEE Xplore Digital Library
Author	Myers, H. C. Cox, J. H.
Copyright Year	1931
Abstract	THE development of the ignitron type of mercury arc rectifier, with its outstanding advantage in efficiency, introduced the need of a new type of excitation circuit. For the theory of how the arc is initiated, the reader is referred to the previous papers on ignitrons.^1,2 Associated with each anode of an ignitron rectifier is an ignitor for initiating the arc. Each ignitor requires a positive impulse of current once each cycle to start the arc at the beginning of the conducting period of the main anode. In order to accomplish control of the output voltage of the rectifier, it must be possible to adjust the phase position of these impulses with respect to the supply voltage, either manually or by automatic provisions. Although the instantaneous current and power of the impulses are quite high, the impulse duration may be such that the average power is low and does not seriously affect the efficiency of rectifiers with the ratings usually encountered. If an excitation system such as “main anode” is used with which only enough energy is applied to the ignitor each cycle to ignite the arc, the average power is very small. However, with separate excitation systems, every impulse must have the same energy and this must be adequate to ignite the arc under the most adverse conditions encountered.
Starting Page	943
Ending Page	948
Page Count	6
File Size	1425781
File Format	PDF
ISSN	00959197
Volume Number	60
Issue Number	10
Language	English
Publisher	American Institute of Electrical Engineers
Publisher Date	1941-10-01
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Rectifiers Inductors Thyratrons Anodes Circuit faults Capacitors Phase transformers
Content Type	Text
Resource Type	Article

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