What is the role of the control in the on-board DCDC?(3)

Input protection circuit General high voltage input module 24V input power supply supply products use built-in filters, which can meet the requirements of general 24V input power supply applications. If a more demanding power system is required, control in the on-board DCDC the input filter network should be added. Either LC or π can be used but care should be taken to choose a smaller inductance and larger capacitance.

The high-voltage DC power supply for electrostatic precipitator has been developed in China. The commercial power is rectified into DC, and the full-bridge zero-current switch series resonant inverter circuit is used to invert the DC voltage to a high-frequency voltage, which is then boosted by a high-frequency transformer, and finally rectified. for DC high voltage. Under the condition of resistive load, the output DC voltage reaches 55kV, the current reaches 15mA, and the operating frequency is 25.6kHz.

In order to prevent the transient high voltage damage of the high voltage input module 24V input power supply supply, it is recommended that the user connect the transient absorption diode to the input terminal, and cooperate with the fuse to ensure that the module is within the safe input voltage range. In order to reduce the common mode noise, Y (Cy) can be increased and several capacitors nf high frequency capacitors are generally selected. R is a fuse, D is a protection diode, and D is a transient absorption diode (P6KE series).