Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1981-02-12
1983-03-29
Shoop, William M.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
323902, 331112, H02M 3335
Patent
active
043785859
ABSTRACT:
A free-running blocking oscillator-type converter for producing a controlled output signal. The converter is provided with a primary winding of a transformer, a switching transistor, and a resistor which are connected in series with one another between first and second input terminals of the converter. The transformer is further provided with a feedback winding which is coupled to the base terminal of the switching transistor. In some embodiments, optoelectronic coupling devices are used in a sensor arrangement for providing a control signal responsive to variations in the magnitude of the output signal of the converter. In other embodiments, such variations in the output signal of the converter are sensed by a transformer winding. Circuitry is disclosed for applying the sensor control signal selectably to the base and emitter terminals of the switching transistor.
REFERENCES:
patent: 3327202 (1967-06-01), Mills
patent: 3911352 (1975-10-01), Slack
patent: 4005351 (1977-01-01), Blum
patent: 4079436 (1978-03-01), Brown
patent: 4316242 (1982-02-01), Colangelo et al.
"Transistor-Gleichspannungswandler", von Helmut Schweitzer, 1969, p. 34.
Shoop William M.
Siemens Aktiengesellschaft
Wong Peter S.
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