Direct-current drive and active temperature control system of two-stage high-frequency pulse tube refrigerator and design method thereof

Abstract

The invention discloses a direct-current drive and active temperature control system of a two-stage high-frequency pulse tube refrigerator and a design method of the two-stage high-frequency pulse tube refrigerator. The system is composed of a first DC (direct current)-DC conversion module, a second DC-DC conversion module, a dual-channel analogue-digital signal conversion module, a two-stage weighing control module, a PID (Proportion Integration Differentiation) control module, a SPWM (Sinusoidal Pulse Width Modulation) signal modulating module, a dual-channel digital-analogue signal conversion module, a dual-channel temperature signal collecting and operation amplifying module and an H bridge power amplifying module. Cold end temperature in each stage of the two-stage refrigerator is collected and converted into appropriate voltage signals, control signals are output by treating a series of signals so that the two-stage pulse tube refrigerator can be efficiently driven by a direct current power supply, and the cold end temperature in each stage of the two-stage refrigerator is actively controlled. The two-stage high-frequency pulse tube refrigerator has a very positive connotation when being applied to spaceflight and other special fields.

Description

technical field [0001] The invention relates to the field of refrigeration and cryogenic engineering and the field of physical electronics, in particular to a DC drive and active temperature control system and design method of a two-stage pulse tube refrigerator. Background technique [0002] The pulse tube refrigerator is a major innovation of the regenerative cryogenic refrigerator. It cancels the cold end ejector widely used in the conventional regenerative cryogenic refrigerator (such as Stirling and G-M refrigerators), and realizes the cold Low vibration, low interference and no wear at the end; and after structural optimization and important improvements in phase adjustment methods, its actual efficiency has reached the highest value of regenerative cryogenic refrigerators in typical temperature ranges. These remarkable advantages make the pulse tube refrigerator a hot spot in the research of cryogenic refrigerators in the past 30 years, and have been widely used in ae...

AI Technical Summary

Problems solved by technology

Compared with the single-stage pulse tube refrigerator system, the two-stage pulse tube refrigerator system has to drive and control the two-stage pulse tube cold fingers, and the driving and control tasks become more sensitive and cumbersome

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