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The Role Of Rectifier In The Alternator Power Supply System
Jul 26, 2017

The role of Rectifier in the alternator power supply system
        High-frequency Rectifier used in the alternator power system, the role of the alternator is generated by alternating current alternating current to achieve the power supply to the electrical equipment and to the battery; the second is to limit the battery current back to the generator, The generator is not burned by the reverse current. Silicon diode with a one-way conductive characteristics, that is, at both ends of the silicon diode with a certain voltage (power positive diode diode connected, the negative side of the negative power supply diode), the diode on the conduction, there is current flow, and vice versa, the diode does not Conduction, no current through.
        In this way, the current can only pass from one direction. People use the characteristics of the diode, made of Rectifier. When the AC voltage is applied to the high frequency Rectifier, only half of the alternating current is allowed to pass and the negative half cycle does not pass, so the pulsating direct current is output at the negative end of the Rectifier.
 The characteristics of thyristor Rectifier: "explosive". However, if the anode or the control electrode is the reverse voltage, the thyristor can not turn on. The effect of the control electrode is to turn on the thyristor by applying a positive trigger pulse, but it can not turn it off. So, what method can the turn-on thyristor turn off? Turn the thyristor off, turn off the anode power (switch S in Figure 3) or make the anode current less than the minimum value Maintain current). If the thyristor anode and cathode are added between the AC voltage or pulsating DC voltage, then the voltage zero, the thyristor will turn off.
 SCR Rectifier, is a thyristor (power electronic power devices) as the basis, intelligent digital control circuit as the core of the power power control electrical appliances. With high efficiency, no mechanical noise and wear, fast response, small size, light weight and many other advantages.
Thyristor (Thyristor) is a short description of the thyristor, also known as silicon controlled Rectifier (Silicon Controlled Rectifier - SCR), previously referred to as thyristor. Because of its ability to withstand the voltage and current capacity is still the highest in the current power electronics, and reliable, so in large-capacity applications still have a more important position.
The characteristics of thyristor Rectifier: "explosive". However, if the anode or the control electrode is the reverse voltage, the thyristor can not turn on. The effect of the control electrode is to turn on the thyristor by applying a positive trigger pulse, but it can not turn it off. So, what method can the turn-on thyristor turn off? Turn the thyristor off, turn off the anode power (switch S in Figure 3) or make the anode current less than the minimum value Maintain current). If the thyristor anode and cathode are added between the AC voltage or pulsating DC voltage, then the voltage zero, the thyristor will turn off.
  These appliances used in the car, such as home appliances are generally "parallel" use, but the load characteristics of each kind of electrical appliances are not the same, these battery-powered Rectifier in the start, the load characteristics will be different from each other Different voltage stabilization results.
  In the two basic types of Rectifier based on high power diodes or thyristors, the high voltage AC power of the grid is converted to DC power by the transformer. Other types of Rectifier that refer to future (near or far away): choppers, choppers DC / DC converters or current source inverters, based on uncontrollable diode-walled products. Obviously, this latest type of Rectifier technically contains more to develop content, but it can show advantages, for example, it is very small harmonic interference and 1 power factor loaded on the grid.
        Rectifier is the direction of the size of the ever-changing AC, into the same direction, the size of the change in the one-way pulse power. And then through the filter circuit, the regulator circuit, the pulsating power into the same size of the DC.