Satellite-borne double-refrigerator peak load shifting controller

Abstract

The invention discloses a satellite-borne double-refrigerator peak load controller which is composed of a control circuit and a power circuit. The control circuit is composed of a microprocessor circuit, a communication interface circuit and an SPWM (sinusoidal pulse width modulation) interface circuit. The power circuit is composed of a first inverter circuit, a second inverter circuit, a first LC filter circuit and a second filter circuit. The control circuit outputs two independent SPWM signals for respectively controlling the two inverter circuits in the power circuit. Then the two independent SPWM signals are converted to smooth sinusoidal voltage signals through the two LC filter circuits. The controller controls the two refrigerators for operation through outputting the two sinusoidal voltage signals of which the phase difference is 90 DEG. The satellite-borne double-refrigerator peak load controller can reduce a total input peak power through peak load shifting and reduces the requirement for a satellite-borne power system in operation of the refrigerators on condition that the two refrigerators are controlled for performing simultaneous operation. Furthermore relative to a manner that two refrigerators are controlled by two controllers, the satellite-borne double-refrigerator peak load controller has functions of simplifying the system and reducing cost.

Description

technical field [0001] The invention belongs to the refrigeration machine control technology in a space-borne infrared remote sensor, and mainly relates to a space-borne double refrigeration machine peak shift controller. Background technique [0002] With the rapid development of space infrared remote sensing technology, the functions of spaceborne infrared remote sensors have become more abundant, and the spectral bands have become more numerous. A remote sensor is usually equipped with two or more infrared detection devices to meet different observation requirements. Since the infrared detector needs a low-temperature environment to work, a corresponding number of refrigerators are required to work at the same time. The characteristic of the operation of the refrigerator is that it is driven by a sinusoidal voltage, so the power required for the operation of the refrigerator fluctuates in a sinusoidal form. After calculation, its peak power can reach twice the average p...

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, and to propose a peak-staggered controller for dual refrigerating machines on board, which solves the problem that the required total peak input power is too large when the two refrigerating machines work at the same time

Aiming at the problem that the required total peak input power is too large due to the superposition of the same phase when two refrigerators work at the same time, a space-borne dual refrigerator peak shift controller is provided

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