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

A technology of power modulation and high-voltage switching, which is applied in the field of electronic information, can solve the problems of several thousand volts to tens of thousand volts, volume, weight, reliability, difficulty in designing price, small output voltage change, etc. Released energy, improved protection performance and reliability, and good voltage stabilization performance

Inactive Publication Date: 2010-12-29
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

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Embodiment Construction

[0023] Various details involved in the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be pointed out that the described embodiments are only intended to facilitate the understanding of the present invention, rather than limiting it in any way.

[0024] The electrical principle block diagram of a high-voltage switching power supply used in a traveling wave tube power supply modulator is shown in figure 1 .

[0025] The input circuit 1 is mainly to convert the primary input voltage U in Rectification and filtering form the required DC voltage. If a power supply U in It is a DC power supply, and the input circuit 1 is mainly an electromagnetic compatibility filter (EMI) circuit.

[0026] The inverter circuit 2 is the core of the switching power supply. The AC and DC conversion input of the inverter circuit 2 is connected to the output of the input circuit 1, and its control input is conne...

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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...

Claims

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Application Information

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IPC IPC(8): H02M3/24H02M3/335G05F1/46
Inventor 董戈陈宇陈仲林徐成前
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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