The Principle of Action of Automobile IGBT Rectifier
Principle of action analysis:
All electrical equipment on the car is powered by batteries and generators. So we have to ask, the battery output is already DC, and then also high-frequency IGBT Rectifier filter what wave? Do not worry, let's start with the generator. The car engine drives the generator through three sets of Y-type stator stator coils, resulting in three sets of different AC voltage, and then through the generator built-in six positive and negative rectifier crystal (rectifier particles), full-wave rectifier After the conversion into a DC voltage to supply the car's electrical equipment such as air-conditioning compressor, audio, ECU, ignition coil, fuel pump and headlights and so on. In other words, all the electricity in the car is supplied by the generator, and the battery is purely the conversion of the electric energy into a chemical energy storage unit. In addition to being able to supply the electricity needed to start the engine, It is possible to carry out the compensation function of the discharge at any time, so the battery itself has certain constant voltage rectification effect, and after the rectifier after the rectifier, there are still some irregular fluctuations ( The so-called even wave voltage, through the oscilloscope can be seen as a sinusoidal voltage curve, the voltage fluctuates within a certain range, when the high and low, peak wave valley voltage difference of 1.6 to 1.7 volts or more, again and again, do not underestimate the 1.7 volt drop , To know your car's working voltage is 12V, a difference of 1.7 volts, it means that your car is only 85% of the ignition efficiency ah! In the sine wave peak, the voltage is high, the spark plug can be normal ignition, explosive power in the sine valley, Low voltage, IGBT Rectifier spark plug can not be normal ignition, explosive power is weak, is bound to cause fuel is not sufficient, fuel consumption oil, carbon deposition, etc. The above characteristics by the automotive generators Making the decision, both the high-end cars and low-grade cars are the same), in the city to stop walking driving conditions, the degree of voltage instability will become increasingly evident, if coupled with higher age circuit system oxidation , The impact of high resistance, more likely to have accelerated strength reduction, idle instability and low efficiency of air-conditioning compressor and so on the situation, and not stable enough for the electrical appliances itself, it is the cause of reduced life one.
It can be seen, just rely on the battery itself, the regulator effect, the effect is very limited, because the battery is a lot of positive and negative lead with the combination of electrolytes, and its contact with the electrolyte area is small, charge and discharge The performance is naturally limited, but engage in a DC regulator, the cost is too high (the total car is the maximum current is very large), IGBT Rectifier so the use of capacitor filtering to enhance the efficiency of the regulator (does not have a long time storage of electricity ) The method is relatively simple and low cost. The internal structure of the capacitor is composed of two or more metal foil and dielectric combination, with fast charge and discharge, make up the effect of the traditional battery performance, IGBT Rectifier in the car load soared (open air conditioning, vigorously step on the gas, etc.) Can quickly make up the required power.
The Function and Characteristics of High Frequency IGBT Rectifier for Vehicles
1, to enhance the engine horsepower, so throttle reaction more light and sensitive
2, to improve the brightness of the light, high beam lights are much brighter than before
3, to improve the low-end driving the phenomenon of vehicles, so that the file more smoothly
4, to improve the ignition efficiency, so that the spark plug burning more fully
5, to reduce the phenomenon of idle jitter, making it more stable
6, to reduce the clutter interference, improve the sound quality of car audio system
7, to protect the battery and the original car electrical circuit system, reduce its load and extend the service life