Guide: Magnetron is an electronic device, but what is “magneticâ€? What is “tubeâ€? What kind of device is “ magnetron â€, what function can be done? Its working principle is What kind of? If you are anxious, this article will tell you the answer~
First, the principle of magnetron - - Introduction
The magnetron, the English name for Magnetron, was developed between 1936 and 1937 and was applied on the market in 1939. It is a device that can generate microwave energy. "Magnetic" in "magnetron" refers to the magnetic field, and "tube" refers to the diode. Therefore, the "magnetron" actually places the diode in a magnetic field. Under the action of the magnetic field and the generated electric field, the electron in the tube will The process of converting the energy acquired in an electric field into microwave energy. Magnetrons are widely used because of their low cost, small size, high power, and high efficiency.
Second, the principle of magnetron - - classification
There are many classification methods for magnetrons, which can be divided into frequency-adjustable magnetrons and frequency-fixed magnetrons according to whether the frequency is fixed. It can also be divided into coaxial magnetrons and anti-coaxial magnetrons according to different structural characteristics. Tube and ordinary magnetron; it can also be divided into continuous wave magnetron and pulse magnetron according to different working states.
Third, the principle of magnetron - - structure
The magnetron is mainly composed of an anode, a cathode, an energy output device, a magnetic circuit system and a tuning device. Among them, the anode has three functions, one of which is to form a high-frequency electromagnetic field together with the cathode, which provides space for energy conversion of electrons in the diode; the second is to complete the function of collecting electrons; the third is to determine the high-frequency electromagnetic field to a certain extent. Vibration frequency. The cathode is regarded as the "heart" of the magnetron, and it performs three functions. One is to form a high-frequency electromagnetic field together with the anode (as described above); the other is to emit electrons; the third is to affect to some extent. The performance and life of the magnetron. The energy output device, as its name implies, is an output device for connecting to the outside world to deliver the converted microwave energy to an external system. Magnetic circuit systems are used to generate a constant magnetic field. The tuning device is used to adjust the frequency, and this portion may not be added to some fixed frequency tubes.
Fourth, the principle of magnetron
The working principle of the magnetron is like this: First, the cathode emits electrons. Under the action of the orthogonal high-frequency electromagnetic field, the electrons move in a wobble motion, and the magnetic field and the electric field are adjusted to make the electrons move in the circumferential direction just like the microwave field. The speed is equal, for synchronous movement. Secondly, the electrons in the microwave deceleration field gradually move closer to the anode, converting energy into microwave energy, which is beneficial to stabilize the generation of microwave oscillations, which is called favorable electrons; on the contrary, the electrons in the microwave acceleration field gradually move closer to the cathode. Converting microwave energy absorption into its own energy is not conducive to stabilizing the generation of microwave oscillations, which is called unfavorable electrons. Finally, in the deceleration field, the electrons gradually gather, and in the acceleration field, the electrons gradually disperse under the action of the center force away from the acceleration field, so that the favorable electrons are gradually increased and the electrons are gradually reduced. To a certain extent, the magnetron is in the magnetron. A stable microwave oscillation is generated, that is, microwave energy is generated.
Fifth, the application
In daily life, the application of magnetrons is still very extensive. This device is included in the microwave oven to generate microwave energy through the magnetron, thereby heating the food in the microwave oven. In addition, what kind of equipment does the magnetron still exist in daily life? Hurry and think about it~
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