High-voltage switch power supply for power modulator of travelling wave tube

Abstract

The invention belongs to the field of electronic information and provides a high-voltage switch power supply for a power modulator of a travelling wave tube. The power supply comprises an input circuit, a low-voltage storage capacitor, an inverter circuit, a step-up transformer, a rectifying and filtering circuit, a voltage-dividing and sampling circuit and an isolation feedback circuit. The power modulator of the travelling wave tube is realized. The power supply is characterized in that: an isolation closed-loop feedback switch power supply and the low-voltage storage capacitor are adopted, so that high output voltage stability, small size and light weight of the power modulator for a travelling wave tube amplifier are ensured, reliability is enhanced and cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of electronic information, and realizes a traveling wave tube amplifier power supply modulator by using an isolated closed-loop feedback high-voltage switching power supply with a low-voltage energy storage capacitor. Background technique [0002] Traveling wave tube amplifiers are widely used in modern pulsed radar systems. Due to the small size, light weight and small output voltage ripple of the switching power supply, it has become the development direction to use the switching power supply as the modulator of the traveling wave tube power supply. In order to improve the phase stability of the traveling wave tube amplifier (Traveling wave tube Amplifier, TWTA) microwave output signal, it is required that the output voltage stability of the high-voltage power supply powered by the traveling wave tube is very high. In modern coherent radar systems, the output voltage stability of the high-voltage power sup...

AI Technical Summary

Problems solved by technology

There are many forms of linear voltage regulators, the main disadvantage of which is the problem caused by the high potential of the suspended high-voltage output terminal, and has little effect on the output voltage change caused by the fluctuation of the primary power supply. Generally, it is necessary to add a pre-stabilization circuit at the power input terminal.

The capacity of the high-voltage energy storage capacitor is a few tenths to several microfarads, and its withstand voltage requires several thousand volts to tens of thousand volts. Its volume, weight, reliability, price and other issues are difficult for designers to solve.

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