Magnetron Filament Power Supply Control System

Abstract

This application relates to the field of microwave magnetron technology, and discloses a magnetron filament power supply control system for controlling the work of the magnetron filament, including a main power module, a sampling control module, a monitoring and protection module and a current mode PWM controller , the main power module includes a power switch tube; the sampling control module is electrically connected to the input terminal of the monitoring and protection module, the current mode PWM controller and the main power module, and the output terminal of the monitoring and protection module is electrically connected to the current mode PWM controller Connection; the monitoring and protection module is not only used to judge whether the sampled voltage signal or the sampled current signal exceeds the preset threshold, if it exceeds, it will control the current mode PWM controller to stop output, so that the main power module stops working, and is also used to The size of the output pulse width signal of the current mode PWM controller is adjusted in real time according to the sampled voltage and current signals. The invention has the effects of stable output and real-time monitoring and protection.

Description

technical field [0001] The present application relates to the technical field of microwave magnetrons, and in particular, to a magnetron filament power supply control system. Background technique [0002] Traditional magnetron filament power supplies mostly use flyback switching power supplies. Flyback switching power supplies are generally suitable for power applications below 100W, but the output of the filament power supply is small voltage and high current, and the power is generally above 100W. The application needs to output a relatively stable DC voltage to provide energy for the preheating of the filament and to protect it accurately, so it is more suitable to use a forward topology. [0003] The magnetron filament power supply produced by some manufacturers already has a sampling circuit and a current mode PWM controller to control the work of the magnetron filament, and can sample the output voltage signal and current signal of the magnetron filament; The correspo...

AI Technical Summary

Problems solved by technology

[0003] Although the magnetron filament power supply produced by some manufacturers already has a sampling circuit and uses a current mode PWM controller to control the work of the magnetron filament, and can sample the output voltage signal and current signal of the magnetron filament; but lacks The corresponding circuit integrated with monitoring and protection functions lacks real-time monitoring of the auxiliary voltage, and the output voltage signal and current signal of the magnetron filament, timely adjusts the output pulse width signal of the current mode PWM controller, and cannot timely Detect voltage and current signals that exceed the safe range and control the magnetron filament to stop working

[0004] For the above problems, there is no effective technical solution

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