The existence principle of triode in DC socket
Release time：2019-11-02 Clicks： Click
There may be triode in DC socket. What are the specific principles? Let's give you a detailed introduction.
Although many people are using and purchasing DC sockets, which are popular electronic components of DC socket manufacturers, they are not clear about the safe scale of the current carrying capacity of DC sockets.
DC socket series new photoelectric switches generally have the function of actively avoiding disturbance to each other, so there is no need to worry about disturbance to each other. However, when several groups of DC socket opposite infrared photoelectric switches are close to the device side by side, adjacent groups and mutual disturbance should be avoided. The most effective way to avoid disturbance is to set the projector and the receiver alternately, and to open the group distance when exceeding the group. Secondly, use Different frequency models are also a good way. The useful way to avoid disturbing each other is to swing away the distance. The farther the DC socket and detection distance are, the greater the distance should be. The detailed distance should be determined according to the debugging situation. Of course, different frequency models can also be used.
Sweep the influence of setting image: when using reflective decentralized projection and light receiver, sometimes the photoelectric switch may not be able to detect stably because the detected object is close to the cloth scene, and the photoelectric switch or setting is a high reflective object such as lubrication. Mirror angle influence: when the tested object has luster or meets the lubricated metal surface, the reflectivity is generally high, which has the effect of mirror like, At this time, the angle between the projector and the detection object device shall be formed so that its optical axis is not perpendicular to the detected object. Then, DC socket shall avoid misoperation.
According to the analysis of DC socket manufacturers, there is a large demand for electricity in winter. Some users like to plug computers, electric heaters, etc. into the same multi-purpose socket. Although it is very convenient to use, there is a great potential safety hazard. In terms of electric heating, its starting current is very large. If it is started at the same time with other high-power electrical appliances, the contact and lead of the socket will be difficult to bear unexpected super Large power load, mutual influence and even damage the electrical appliances themselves, and even the occurrence of accidents.
When DC socket is installed, the distance between the exposed socket and the ground shall not be less than 1.8m, and the distance between the concealed socket and the ground shall not be less than 0.3m. In order to avoid children's electric shock, the safety socket with a secure baffle must be selected to contact with the fingers or poke the hole of the power supply with a metal object.
Do you want to know how the headphone socket realizes the current transmission, how the triode works, and how they achieve the effect we want when we use them.
When the triode of headphone socket is full, the collector potential is very low or even close to or slightly lower than the base potential, and the collector junction is at zero bias, but there is still a large reverse current IC of collector junction. When the current of triode is expanded, the primary current inside the triode is composed of carrier electrons passing through the base area and then the collector area, that is, through the triode The current IC headphone socket with triode is the electronic current, which is very similar to the electronic triode in history.
The principle of current expansion of electronic triode can be explained naturally because of its intuitive structure. It is easy to understand that the fixed share relationship between IB and IC of electronic triode mainly depends on the structure of the gate (base) of electronic triode. When the external circuit conditions are satisfied, the operation of electronic triode is in the expansion state. In the expansion state, the current passing through the tube is mainly controlled by the The flow of electrons from the emitter through the gate to the collector.
When the electronic flow of headphone socket passes through the grid, it is obvious that the grid will intercept it. There is a question about the interception ratio. The size of the interception ratio is mainly related to the grid density. If the grid is made dense, its equivalent interception area will be large, the interception share will be large naturally, and there will be more electronic flow blocked. Otherwise, the interception ratio will be small, and the electronic flow blocked will be large naturally Less, the flow of electrons blocked by the grid is the current IB, and the other flow of electrons through the grid to the collector is IC.
If only the construction scale of the grid is determined, then the closure share is determined, that is, the ratio of IC to IB. therefore, only the internal structure of the pipe is determined, and the ratio is fixed. Therefore, the β value of the current expansion factor is mainly related to the grid density.