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Isolation transformer

About: Isolation transformer is a research topic. Over the lifetime, 8145 publications have been published within this topic receiving 72396 citations.


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Patent
25 Feb 1966

19 citations

Journal ArticleDOI
TL;DR: In this paper, the authors used 2D and 3D time stepping finite element methods (TSFEM) to investigate the leakage flux and electromagnetic forces due to short-circuit and inrush current on the windings of 1000kV A, 10/0.4kV three-phase, three leg, distribution transformer.

19 citations

Patent
22 Mar 2012
TL;DR: In this article, an isolated power conversion apparatus (2) has an isolation transformer (T), a series circuit including a load (16) and an inductor (L) connected in series with each other, the series circuit being disposed on a secondary side of the isolation transformer, and one or a plurality of switching means (S4) disposed between the circuit and the secondary side, the switching means being bidirectional.
Abstract: An isolated power conversion apparatus (2) has an isolation transformer (T), a series circuit including a load (16) and an inductor (L) connected in series with each other, the series circuit being disposed on a secondary side of the isolation transformer, and one or a plurality of switching means (S4) disposed between the series circuit and the secondary side of the isolation transformer, the switching means being bidirectional. This apparatus sends out power from a DC power supply of a primary side of the isolation transformer toward the load as DC power or AC power of an arbitrary polarity, or regenerates and supplies the DC power or AC power from the load to the DC power supply.

19 citations

Patent
17 Dec 2001
TL;DR: In this article, a primary winding of a first insulating transformer for balance-to-unbalance transformation is connected between the central electrode and the outer electrode of an input terminal, and windings of a noise eliminating transformer are provided within balanced lines on the side of a secondary winding of the first transformer.
Abstract: A primary winding of a first insulating transformer for balance-to-unbalance transformation is connected between the central electrode and the outer electrode of an input terminal, and windings of a noise eliminating transformer are provided within balanced lines on the side of a secondary winding of the first insulating transformer. A primary winding of a second insulating transformer for balance-to-unbalance transformation is connected between the central electrode and the outer electrode of an output terminal, and balanced lines on the side of the secondary winding of the second insulating transformer is connected to the noise eliminating transformer. One end of each of the primary windings, which is grounded to the ground line, is connected to the middle point of the secondary winding of each insulating transformer. Noise components having the same phase inputted from both electrodes of the input terminal are cancelled at the primary winding of the first insulating transformer, and the remaining noise components are completely eliminated through the noise eliminating transformer and the secondary winding of the second insulating transformer.

19 citations

Patent
02 Nov 1999
TL;DR: In this article, a DC-DC converter has an isolation transformer that conveys an alternating voltage of about a first frequency between a primary winding and at least one secondary winding thereof and a four-quadrant inverter, coupled to one of the at least secondary winding, that converts a portion of the alternating voltage into a waveform having about a second frequency that is less than the first frequency.
Abstract: A power supply and a method of operating the same. In one embodiment, the power supply includes: (1) a DC-DC converter having an isolation transformer that conveys an alternating voltage of about a first frequency between a primary winding and at least one secondary winding thereof and (2) a four-quadrant inverter, coupled to one of the at least secondary winding, that converts a portion of the alternating voltage into a waveform having about a second frequency that is less than the first frequency, including: (2a) a bi-directional switch, coupled between an input and an output of the four-quadrant inverter and (2b) a controller, coupled to the switch, that activates the switch to couple the input to the output during a portion of a switching cycle of the alternating voltage to change voltages in the waveform.

19 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202313
202251
202144
2020151
2019211
2018266