Regulated flyback power supply using a combination of frequency

Details Regulated flyback power supply using a combination of frequency Regulated flyback power supply using a combination of frequency

1982-07-01

1984-07-10

Wong, Peter S.

Electric power conversion systems

Current conversion

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

363 4997, H02M 3335

Patent

active

044596510

ABSTRACT:
A switching regulator power supply operates at a variable high frequency and pulse width with low power dissipation and a minimum of complexity. The transformer primary windings which are included as part of a self starting circuit start a pulse generator having a variable pulse width and variable frequency. During operation, the input RC network of the pulse generator, in response to the input rectified AC line voltage, conditions the pulse generator to generate output pulses whose widths vary as a function of changes in the input rectified AC voltge. An error circuit coupled to the secondary winding compares the output DC supply voltage to a reference voltage and generates an error signal which is applied through a coupling circuit for further adjusting the frequency of the pulse generator within a desired range to existing load conditions.

REFERENCES:
patent: 4037271 (1977-07-01), Keller
patent: 4400767 (1983-08-01), Fenter

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