NDLI: Pulsewidth modulation derived through control of flux distribution in dual-core transformer

Content Provider	IEEE Xplore Digital Library
Author	Kadri, F.
Copyright Year	1965
Abstract	A novel method of achieving pulsewidth regulation through control of the distribution of flux variations in a dual-core transformer is described. Transfer of drive power or load power is accomplished by utilizing a principal core during a portion of each half-cycle of applied ac voltage. The flux excursion necessary to generate the required counter EMF during the remainder of each input half-cycle takes place in a second or "control core" by which means the duty cycle is varied. Applicability of the scheme to dc-to-dc converters is discussed. Although direct sensing of the output is employed, the negative feedback loop is closed by magnetic coupling to the transformer so that complete input-to-output isolation is obtained. Integrated circuitry provides the required variable time delay in the feedback network.
Sponsorship	IEEE Magnetics Society
Starting Page	581
Ending Page	583
Page Count	3
File Size	325626
File Format	PDF
ISSN	00189464
Volume Number	7
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1971-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Pulse transformers Space vector pulse width modulation Pulse modulation Transformer cores Counting circuits Magnetic cores DC-DC power converters Negative feedback loops Magnetic flux Coupling circuits
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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