Self start flyback power supply

Patent · Tue Aug 23 00:00:00 EDT 1983

OSTI ID:5566171

Fenter, W S

A switching regulator power supply operates at a variable high frequency with low power dissipation and a minimum of complexity. The transformer primary windings are included as part of a self starting circuit which starts a pulse generator having a fixed pulse width and variable frequency. During a first cycle of operation, the self starting circuit in response to the input rectified AC power after a predetermined period of time applies sufficient voltage which enables the pulse generator to begin generating a first output pulse of fixed pulse width. This causes the primary windings to store energy and feedback energy to the self starting circuit which increases the voltage applied to the generator causing it to begin normal operation at maximum frequency. 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 DC coupling circuit for adjusting the frequency of the pulse generator to existing line and load conditions.

• Assignee: Honeywell Information systems Inc.
• Patent Number(s): US 4400767
• OSTI ID: 5566171
• Resource Relation: Patent File Date: Filed date 30 Jun 1981; Other Information: PAT-APPL-279108
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
SWITCHING CIRCUITS
POWER SUPPLIES
AC SYSTEMS
DC SYSTEMS
PULSE GENERATORS
PULSES
TRANSFORMERS
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
ENERGY SYSTEMS
EQUIPMENT
FUNCTION GENERATORS
POWER SYSTEMS
200301* - Power Transmission & Distribution- AC Systems
EHV & UHV- (-1989)
200302 - Power Transmission & Distribution- DC Systems- (1989-)