Transformer impedance refers to the impedance of the coil winding in the transformer, including resistance, inductive reactance, and capacitive reactance.
Transformer standards have clear specifications for impedance and loss. After some users increase or decrease the impedance voltage, the loss is still unreasonable according to the standard requirements. If the impedance voltage becomes smaller, a reasonable change is: the no-load loss becomes larger and the load loss becomes smaller; if the impedance voltage becomes large, a reasonable change is: the no-load loss becomes smaller and the load loss becomes larger;
Transformer impedance changeThe transformer is like a water pipe. Since one end is fine and the other end is rough, of course, the resistance to water is not the same.
The transformer primary line is thin and the number of turns is large, so the inductance (resistance) is large (the input voltage is high and the current is small.)
The secondary line is thick and the number of turns is small, so the inductance (resistance) is small (the output voltage is low and the current is large.)
Because the primary and secondary are wound on the same core, their impedance is closely linked and interacts with each other.
If the secondary impedance changes. The primary impedance will also change accordingly (ie, the magnetic flux absorbed by the secondary will be larger and the magnetic resistance will be smaller. The primary will increase the current to increase the flux. This is the impedance reflection... If the secondary circuit is short-circuited, the primary will Burned.). Therefore, we should use it rationally according to the parameters of the transformer. (Ideal transformer impedance change property)
Hypothesis is that the transformer secondary primary turns ratio is n:1, depending on the characteristics of the transformer,
The secondary voltage is primary 1n and current is n times primary.
Primary impedance = primary voltage
Primary current
Secondary impedance = secondary voltage
Secondary Current = (1n) Primary Voltage
(n primary current) = [1
(nn)] Primary impedance. Or primary impedance = (nn) secondary impedance.
This shows that the impedance of each coil of the transformer is proportional to the square of the number of turns of the coil. Using this feature, you can use transformers with different turns of the transformer to change the impedance. The simplest is the TV antenna. When using a flat feed line, the impedance is 300Ω, and the TV antenna input is 75Ω. An impedance conversion socket must be used, which is a 2:1 transformer of a ferrite core. 300Ω and 75Ω impedance matching.
(Ideal transformer impedance change property)
Transformer impedance change propertiesThe simplest impedance transformation is to convert the conversion between a series form and a parallel form between a resistor and a reactance element based on the fact that the quality factor Q of the series and parallel equivalent circuits does not change.
This type of transformation is commonly used in impedance matching (ie tuning) techniques. In addition, in order to obtain a high Q value, an inductor and capacitor tap impedance converter is generated, which can convert a smaller source resistance and load resistance into a larger resistance value so that Q becomes correspondingly larger.
Impedance is the total resistance and reactance of the typical reactance components such as: capacitance and inductance. The reactance value changes with frequency. Of course, a load may have both a reactance component and a resistive component at the same time.
With the advancement of technology, LED technology has been applied to projectors. There are many good domestic LED projector manufacturers in the market. For example, Shenzhen Resources has perfectly combined this technology with DLP technology to make it portable and compact. Because of its low power consumption and heat generation, it is more widely used in life and in personal business. The same goes for LED hotel projectors.
portable led projector,led home theater projector,led holiday projector,led room light projector,led 4k projectors
Shenzhen Happybate Trading Co.,LTD , https://www.happybateprojector.com