RU1800566C - Single-cycle d c/d c converter - Google Patents

Abstract

Usage: in the source of secondary power of electronic equipment. SUMMARY OF THE INVENTION: between the input terminal 1 of the voltage converter and the terminal of the input capacitor 3, a current limiting resistor 13 is connected, shunted by the triac 4, the control electrode of which is connected to the second terminal of the power bus 7. The charge current of the input capacitor 3 is limited to safe for the network and the elements of the converter level, which determines an increase in the reliability of the voltage converter. 2 ill.

Description

ate

WITH

Figure 1

The invention relates to electrical engineering and can be used in secondary power sources of electronic equipment.

An object of the invention is to increase reliability by optimizing key management with self-locking open state.

In FIG. 1 is a circuit diagram of a one-stroke voltage converter according to the invention; in FIG. 2 is a timing diagram illustrating its operation.

The single-ended DC / DC converter contains a controlled key 1, through the primary winding 2 of the transformer 3, connected to the first output of the power jumper 4, while the damping winding 5 of the transformer 3 is connected by one output to the primary winding 2 of the transformer 3, and the other output is connected to the first output diode 6, the input capacitor 7, connected to the input terminals 8 and 9 through a current-limiting resistor 10, shunted with a key with self-locking open state (triac) 11, and the secondary winding 12 the transformer 3 through the rectifier 13 and the filter 14 is connected to the output terminals 115 and 16, the second terminal of the diode 6 is connected to the junction point of the current-limiting resistor 10 with the input capacitor 7, and the second output of the power jumper 4 is connected to the control electrode of the key with self-locking open state 11 made in the form of a triac.

The voltage converter operates as follows.

When the input voltage is applied to the input terminals 8 and 9 of the converter, the input capacitor 7 is charged through the resistor 10, whereby its charge current is limited to a safe value both for the input network and for the elements of the voltage converter circuit. Upon completion of charging of the capacitor 7, an opening voltage pulse is supplied to the controlled switch 1 (time ti, diagram Uynp 1). In this case, current h flows in circuit 7-11-4-2-1-7 (time interval ti-t2 in FIG.

2). Triac 11 opens and shunts resistor 10, which eliminates power dissipation in it. The voltage of the secondary winding 12 of the transformer 3 through the rectifier 13 and the filter 14 is supplied to the output terminals 15 and 16 of the Converter. At the end of the opening voltage pulse (time 12), the controlled switch 1 is closed. In this case, the current Is,

due to the energy of the power throttle 4, flowing along the circuit 4-5-6-уе1,1-4, supports the triac 11 in the open state (time interval ta-ta). Secondary rectified voltage 12

transformer 3 through the rectifier, 13 and the filter 14 is fed to the output terminals of the Converter 15 and 16.

The current of the control electrode of the triac 11 is shown in the diagram C (i knot 11)

FIG. 2.

Upon receipt of the next opening voltage pulse to the controlled key 1, all processes are repeated.

Claims (1)

The claims A single-ended DC / DC converter containing a controlled key through the primary winding of the transformer is connected to the first terminal of the power throttle, while the damping winding of the transformer is connected by one terminal to the primary winding of the transformer, the other terminal is connected to the first terminal of the diode, an input capacitor connected to the input terminals through a current-limiting resistor, shunted with a key with self-locking open state, and the secondary winding of the transformer through a rectifier and a filter are connected to the output terminals, characterized in that, in order to increase reliability by optimizing key management with self-locking the open state, the second the output of the diode is connected to the connection point of the current-limiting resistor with the input capacitor, and the second output of the power throttle is connected to the control electrode of the self-locking key open state in the form of a triac. Fi .. 2