Dc switching power supply is the use of circuit control switch tube for high-speed conduction and cutting, DC into high-frequency alternating current to provide transformer voltage, thereby generating a group or more groups of required voltage. The reason to convert to high frequency ac, because high frequency ac in the transformer circuit is much more efficient than 50HZ, so the switching transformer can be done very small, and work when the heat is not much, the temperature is not high, the cost is very low, if you do not turn 50HZ into high frequency, then dc power supply is not very meaningful.

 

500KW load bank
 

The main circuit of DC power supply input from AC grid, DC output process:

1, the input filter: its role is to filter the clutter in the power grid, but also to prevent the clutter generated by the machine feedback to the public power grid.

2, rectifier filtering: the grid AC power supply is directly rectified to a smoother DC, the next level of transformation.

3, inverter: DC rectification into high frequency alternating current, is the core part of high frequency switching DC power supply, the higher the frequency, the smaller the volume, weight and output power ratio.

4, output rectifier filtering: according to the load needs, to provide stable and reliable DC power supply.