Blocking oscillator switching power supply with transformer dema

Details Blocking oscillator switching power supply with transformer dema Blocking oscillator switching power supply with transformer dema

1990-10-01

1991-12-24

Beha, Jr., William H.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

307354, 363 56, H02M 3338

Patent

active

050758373

ABSTRACT:
The transformer of a blocking oscillator converter is magnetized in a flux phase during which a switch on its primary side is switched on. In a blocking phase, in which the switch is switched off, the transformer is demagnetized by giving off energy to a load connected on the secondary side. In order to ensure for the switch to be switched on only after the transformer is fully demagnetized, a transfomer voltage is formed and the switch is only allowed to switch on when the voltage of values with a polarity has returned to finite values with the opposite polarity. The threshold value begins at zero or a value of the first polarity after the switching power supply is put into operation and then shifts to values of a second polarity if the shift does not begin before the time at which the voltage at the load rises.

REFERENCES:
patent: 4352999 (1982-10-01), Galpin
patent: 4958268 (1990-09-01), Nagagata
patent: 4984145 (1991-01-01), Dangschat et al.

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