High-efficiency pulse load power supply and voltage hysteresis control method thereof

Abstract

The invention discloses a high-efficiency pulse load power supply and a voltage hysteresis control method thereof. The voltage hysteresis control method comprises the steps of acquiring a load end voltage of an interleaved parallel bidirectional buck / boost converter connected between the power supply and a load by using a sampling circuit; comparing the load end voltage of the interleaved parallel bidirectional buck / boost converter with a boost low-voltage given value, a boost high-voltage given value, a buck low-voltage given value and a buck high-voltage given value which are preset, and generating a corresponding square-wave pulse control voltage according to a comparison result; and amplifying the square-wave pulse control voltage and transmitting the amplified square-wave pulse control voltage to a switching tube in the interleaved parallel bidirectional buck / boost converter so as to control the on-off of the switching tube by using a voltage hysteresis control algorithm. According to the invention, a voltage hysteresis loop double-position control mode is adopted, and in the control mode, the action times of the switching tube in the system are obviously reduced, so that the switching loss of the system is reduced, and the working efficiency of the system is improved.

Description

technical field [0001] The invention belongs to the technical field of power electronic converters and controls, and in particular relates to a high-efficiency pulse load power supply and a voltage hysteresis control method thereof. Background technique [0002] The bidirectional buck / boost converter has the advantages of high efficiency, high power density, simple structure, etc., and has the function of bidirectional energy transmission. It is suitable for various power supply systems, such as radar base station power supply systems, vehicle batteries, photovoltaic grid-connected systems, wind power generation systems, Wait for the power supply system. Combined with interleaved parallel technology, the bidirectional buck / boost converter can be expanded and frequency multiplied, thereby increasing the switching frequency of the system, reducing output ripple, reducing the volume of magnetic components, and increasing system power density. [0003] Working efficiency and sw...

AI Technical Summary

Problems solved by technology

When applied to pulse-type loads, such loads have the characteristics of intermittent work, and the load is light and heavy, and the traditional control mode often cannot meet the work efficiency when the load changes.

The traditional control mode often makes the bidirectional buck / boost converter work continuously, the switching tube continues to switch, and unnecessary continuous action will cause the system to continuously generate large switching losses, showing a situation where the reactive power of the system remains unchanged and the total power decreases. phenomenon, resulting in a gradual decrease in the efficiency of the system

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