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Microwave source transmission power control method and microwave transmission system

A technology of emission power control and microwave emission, applied in microwave heating, electric/magnetic/electromagnetic heating, electrical components, etc., can solve the problems affecting the heating efficiency and effect of materials, and achieve a wide range of effects

Active Publication Date: 2021-10-22
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Setting the monitoring threshold lower will often affect the heating efficiency and effect of the material

Method used

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  • Microwave source transmission power control method and microwave transmission system
  • Microwave source transmission power control method and microwave transmission system
  • Microwave source transmission power control method and microwave transmission system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] In this example, the microwave transmitting system has a structure such as figure 2 As shown, it includes a magnetron microwave source 10 , a power collection device 12 and a control device 11 .

[0044] The magnetron microwave source 10 in this example is a high-power microwave source composed of four magnetrons, and transmits microwave energy to the load through the power coupling device 13 .

[0045] In this example, the power coupling device 13 is composed of a high-power circulator.

[0046] The power collection device 12 collects microwave power data reflected by the load at a set sampling frequency through the power coupling device 13 .

[0047] The power collection device 12 may use a power meter or a power measurement circuit, etc., and may use one or more reflected power measurement methods to measure microwave power.

[0048] The control device 11 is connected with the power collection device 12 and the microwave source 10 to form a closed feedback control l...

Embodiment 2

[0069] The microwave source transmission power control method of the present invention is particularly suitable for microwave heating systems in which the microwave source is a magnetron microwave source, such as various microwave heating devices, microwave heating reaction furnaces, microwave parameter measurement systems, and the like. In particular, a high-power microwave heating system composed of more than two magnetrons is also very suitable for controlling the microwave source power by using the microwave source emission power control method of the present invention.

[0070] For industrial microwave heating systems, due to the need for very large microwave power, N magnetrons are usually used to form a high-power microwave source. For a high-power microwave heating system composed of N magnetrons, the magnetrons can be divided into 1, 2...n groups, and each group has k1, k2...kn magnetrons respectively. k1, k2...kn can be equal or not. According to the power adjustment...

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Abstract

The invention relates to microwave transmission power control technology. The invention discloses a method for controlling the transmission power of a microwave source, comprising the steps of: a. setting the sampling rate, the reflection power threshold and the reflection power change rate threshold; b. collecting the load reflection power according to the set sampling rate; c. according to the steps b. Calculate the rate of change of the reflected power from the collected reflected power; d. Compare the collected reflected power and the calculated rate of change of the reflected power with the set threshold and execute step e when the reflected power or the rate of change of the reflected power exceeds the set threshold. Otherwise, return to step b; e, send a control signal to the microwave source to adjust the transmit power; f, return to step b. The invention also discloses a microwave transmitting system which adopts the above method to control the transmitting power of the microwave source. The technical solution of the invention is widely used, and can regulate and control a single magnetron microwave source and a microwave source composed of multiple magnetrons, and is very suitable for the control of industrial microwave heating systems.

Description

technical field [0001] The invention belongs to the field of microwave energy applications, and in particular relates to microwave transmission power control technology, in particular to a microwave source transmission power control method and a microwave transmission system. Background technique [0002] In recent years, microwave energy, as a clean and green energy, has been widely used in various fields. At present, microwave energy is mainly used in the fields of metallurgy, food processing, waste product processing and chemical industry, mainly in the heat treatment of materials by using microwave. Due to the large-scale industrial application, the microwave reactor has a large processing capacity and requires a very high feed-in power. Magnetrons are often used as microwave sources to heat materials in industry. In addition to the changes in physical properties, many materials often involve chemical reactions during the heating process, and their dielectric properties...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B6/68
CPCH05B6/68H05B6/681
Inventor 杨阳黄卡玛陈星刘长军朱铧丞吴丽
Owner SICHUAN UNIV