Magnetic isolation signal feedback device for space power supply control

Abstract

The invention discloses a magnetic isolation signal feedback device for space power supply control, which belongs to the technical field of space power supplies, and is characterized in that a feedback signal generation circuit realizes sampling and signal conversion of secondary side output voltage and load current of an isolation power supply, generates characteristic signals reflecting the output voltage and current, and realizes an auxiliary source self-lifting function of the circuit; after reference comparison of output characteristic signals is achieved, the output characteristic signals are converted into error signals reflecting topological secondary side output voltage and load current of the isolated power supply, and signal transmission from the secondary side characteristic signals to the primary side in an isolated mode is achieved through a magnetic isolation circuit. The magnetic isolation circuit controls the conduction time and energy storage of a secondary winding of the signal isolation transformer, transmits an error signal to a main winding end of the signal isolation transformer, and completes the signal isolation transmission of the secondary side output voltage and load current characteristics of the isolation power supply. The feedback signal demodulation circuit demodulates the error signal, and the generated error signal is directly proportional to the output voltage and the load current of the isolated power supply.

Description

technical field [0001] The invention belongs to the field of space power supply technology, and in particular relates to a magnetic isolation signal feedback device for space power supply control. Background technique [0002] With the continuous development of my country's aerospace industry, the energy system of space vehicles has become more complex and flexible, such as the reconfigurable requirements of current satellite power supplies, space suits, future lunar vehicles, etc., and the demand for space power supplies is becoming more and more diverse. , especially satellite power supplies are mostly designed for non-isolated topologies. With the multi-bus requirements of space vehicles, such as the voltage supply of multi-type busbars in space stations and the mutual power supply between multi-platform buses through isolated power supplies, the isolated power supply topology between different buses The demand is increasing. The choice of isolated power supply topology mu...

AI Technical Summary

Problems solved by technology

At present, the magnetic isolation feedback method for space power supply applications is extremely complex around the control circuit of the feedback transformer, and the adjustment accuracy is not high. Some methods also require a multi-winding feedback transformer to provide auxiliary sources for the secondary side control circuit or require a special magnetic isolation integrated chip. , especially the traditional magnetic isolation method is only used for voltage loop control, and cannot be controlled for constant current source or constant current constant voltage control, that is, an auxiliary source is required to power and convert the current sampling signal circuit, facing the current space power supply for high-precision control requirements, low static power consumption, multifunction control of current and voltage, and non-traditional topologies become unsuitable

[0003] To sum up, the existing magnetic isolation technology for space power applications requires a dedicated magnetic isolation control chip, and the design of the transformer is complex and requires multiple windings, and the existing technology can only feed back the output voltage of the isolated power supply, and some require complex devices. Due to reasons such as satisfying the space device library, many isolated power topologies cannot be used due to isolation feedback

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