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Full-Wave Magnetic Amplifier Converter With Floating Outputs

IP.com Disclosure Number: IPCOM000099237D
Original Publication Date: 1990-Jan-01
Included in the Prior Art Database: 2005-Mar-14
Document File: 2 page(s) / 54K

Publishing Venue

IBM

Related People

Carroll, LB: AUTHOR

Abstract

The drawing shows a DC/DC converter with the voltage or current, controlled by magnetic (mag amp) devices. This converter is unique since outputs need not be electrically connected to the circuit ground within the converter. They are floating with respect to each other and the circuit ground. Control is possible by varying the through the reset windings on the power transformer mag amp modulators.

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Full-Wave Magnetic Amplifier Converter With Floating Outputs

       The drawing shows a DC/DC converter with the voltage or
current, controlled by magnetic (mag amp) devices.  This converter is
unique since outputs need not be electrically connected to the
circuit ground within the converter.  They are floating with respect
to each other and the circuit ground.  Control is possible by varying
the through the reset windings on the power transformer mag amp
modulators.

      A mag amp controller works by blocking the power AC output
current at the beginning of each half for a time determined by the
amount of current allowed pass through the modulator reset winding
during the half cycle.  This current is determined by the system.
The more reset current allowed to flow, the the modulator will block
the transformer current up a complete half cycle.  The rectifier
diodes allow flow in only one direction through the modulator winding
during the first half cycle.  During the half cycle, current flows
through the modulator and transformer reset windings.

      Although similar circuits are known, none use an power
transformer winding to carry modulator current to the control ground,
thus providing floating outputs.