Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1980-12-15
1982-06-22
Pellinen, A. D.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 56, 363 97, H02M 3335
Patent
active
043365833
ABSTRACT:
A DC-to-DC converter charges a capacitor connected to the secondary of a transformer having a primary connected to a low-level power supply through an input control circuit which, when triggered, connects the power supply to the primary for only a predetermined time interval whereby current flows in the primary establishing a magnetic field that stores energy derived from the power supply. When the current in the primary is interrupted, the field collapses, inducing current to flow in the secondary thereby transferring energy from the field to the capacitor. The control circuit is triggered by a voltage sensor that detects the collapse of the field to zero. The voltage sensor includes a sensor inductively coupled to the magnetic field for developing a sensed voltage having a first level during collapse of the field and a second level after the field collapses to zero, the breakpoint between the levels defining the instant at which the field collapses to zero. A level detector detects the break point in the sensed voltage and triggers the control circuit.
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Campbell Stephen J.
Hambly Warren E.
Harrison George C.
Pellinen A. D.
Polaroid Corporation
Roman Edward S.
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