NDLI: Magnetizing currents in self-locking polyphase inverters

Content Provider	IEEE Xplore Digital Library
Author	Campling, C. Deluca, A. Richard, G.
Copyright Year	1965
Abstract	In conventional polyphase self-locking transistor-magnetic inverters, a single master inverter controls frequency, plays a key role in determining the phase-lock angles of all slave inverter units connected to it, and shares the load equally with these slaves. Implicit in this diversity of function is the need for the transistors in the master to carry magnetizing currents for a set of square-loop timing cores-one associated with each slave. The nature of these magnetizing currents is such that, in the presence of heavy loads, they tend to cause premature switching of the master inverter transistors and, hence, a loss of system synchronism. An arrangement is presented in which the load sharing and timing-locking functions of the master inverter are delegated to an in-phase slave and a submaster. The master inverter retains its key position in the operation of the system, but its residual functions, i.e., stimulation of the system and determination of system frequency, do not require great size and therefore permit simple and economic frequency regulation. The scheme has been applied to a 6-unit 3-phase twelve-step per cycle 1.5-kW inverter, with a nominal 28-volt input and a regulated operating frequency of 400 c/s.
Sponsorship	IEEE Magnetics Society
Starting Page	629
Ending Page	632
Page Count	4
File Size	515505
File Format	PDF
ISSN	00189464
Volume Number	2
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1966-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Inverters Master-slave Timing Magnetic separation Circuits Transformer cores Magnetic cores Magnetic switching Frequency synchronization Power generation economics
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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