Self-excited push-pull oscillation circuit

Abstract

The invention discloses a self-excited push-pull oscillation circuit, which comprises at least two self-excited oscillation unit circuits sharing the same transformer, and each power coil II of the transformer adopts a coil with a center tap. According to the self-excited push-pull oscillation circuit, signals on the power coils are directly used for controlling connection and disconnection of thepower tubes through the coupling network, and particularly, diodes are respectively arranged for accelerating disconnection of the corresponding power tubes, so that the self-oscillation unit circuits can be synchronized with one another, and the situation that in an asynchronous state, currentflows the internal diodes, power consumption is multiplied, and the self-oscillation unit circuits are heated and damaged is avoided. According to the invention, each self-excited oscillation unit circuit is synchronized through the power coil, the blank of synchronous work of a plurality of self-excited oscillation unit circuits is solved, the units with different levels to ground are strictly synchronized, the circuit connection is very simple, and the units coordinate with each other to work at the optimal working point.

Description

technical field [0001] The invention relates to the field of electronic circuits, in particular to a self-excited push-pull oscillation circuit. Background technique [0002] At present, the existing self-excited push-pull oscillating circuit is used in occasions such as signal generation, DC conversion, and power output, and generally uses a single-unit self-excited oscillating circuit. However, there are gaps in the application of multiple units. Because strict synchronization is required between multiple units, even strict synchronization circuits with different ground levels between units, especially when dozens of power units work synchronously, once the synchronization is poor and the power tubes fail to conduct in time, the current will Through the internal body diode, the power consumption is doubled, and the MOS tube is overheated and damaged. Although some can be driven by an isolation transformer, there are problems such as complex circuits, easy deviation of th...

AI Technical Summary

Problems solved by technology

However, there are gaps in the application of multiple units

Because strict synchronization is required between multiple units, even strict synchronization circuits with different ground levels between units, especially when dozens of power units work synchronously, once the synchronization is poor and the power tubes fail to conduct in time, the current will Through the internal body diode, the power consumption is doubled, and the MOS tube is overheated and damaged

Although some can be driven by an isolation transformer, there are problems such as complex circuits, easy deviation of the midpoint of the main power core, and poor circuit stability, so it is difficult to apply in power circuits.

Images