A control circuit that can reduce the input current ripple of space-borne phased array pulse power supply

Abstract

A control circuit capable of reducing input current pulsation of a satellite borne phased array pulsed power source comprises a pulse load multi-pulse driving signal receiving circuit, a control loop switching circuit, a voltage loop control circuit, a current loop control circuit and an output overshooting preventing circuit. When a pulse load does not work, voltage closed loop control is adopted to a power supply so that output voltage can be established to a rated value. When the pulse load begins to work, output voltage closed loop control is switched into output current closed loop control, pulse load multi-pulse driving signals serve as a basis of adjusting the output current so that the output current can automatically change along with the change of pulse duty factor of the load, and the output voltage can be kept relatively stable. The corresponding output overshooting preventing circuit is used in cooperation to solve the output voltage overshooting problem produced in the switching process of a control loop, the output voltage can be controlled within a limited range, and the problem that output voltage overshooting damages a subsequent-level load at the moment of state switching is prevented.

Description

technical field [0001] The invention belongs to the technical field of secondary power supplies for spacecraft, and relates to a power supply control circuit, in particular to a pulse power supply with low input current ripple and high power density. Background technique [0002] Nowadays, phased array radar has a very wide range of applications in the fields of resource exploration, environmental monitoring, disaster warning, military reconnaissance, image matching guidance, etc. demanding. The output peak power of each power amplifier component of the phased array radar antenna array is generally several hundred watts. For the secondary power supply of the load system, its subsequent stage is a capacitive pulse load. When the system is working, the output current of the secondary power supply exists large fluctuations. According to the law of energy conservation, the fluctuation of the output power will inevitably be reflected in the input power, so the input current wil...

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Problems solved by technology

However, due to the constraints of actual conditions, such as the limitation of the size and weight of the secondary power supply, the poor high-frequency characteristics of the capacitor and other factors, the above method will pay a large price, which is contrary to the current design ideas of miniaturization and high power density of the power supply. Moreover, these methods have very limited effects on reducing the amplitude of current fluctuations, and are not an optimal solution.

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