TH230D30NZ-3 220v series high frequency switching power supply The manufacturer will show you the working principle of high frequency switching power supply
TH230D30NZ-3 220v series high frequency switching power supply tells you that the AC power supply is connected to the rectifier module, and after filtering and a three-phase full-wave rectifier, it becomes DC, and then it is connected to the high-frequency inverter circuit to convert the DC into high-frequency AC. Finally, a stable DC is output after the high-frequency transformer, rectifier bridge, and filter.
TH230D30NZ-3 220v series high frequency switching power supply The manufacturer tells you that the high frequency switching circuit is mainly composed of rectifier filter circuit, full bridge conversion circuit, PWM control circuit, voltage stabilizing and voltage limiting circuit, current stabilizing and current limiting circuit, maintenance circuit, and Auxiliary power circuit and other components.
TH230D30NZ-3 220v series high frequency switching power supply The manufacturer tells you that the three-phase grid (or single-phase) voltage is rectified and filtered after the power switch, and the smooth DC voltage of 520Vdc (single-phase 300Vdc) is obtained to supply the inverter circuit.
The inverter circuit is mainly composed of high-power IGBT modules (or field-effect MOSFET modules) to meet the bridge conversion circuit. TH230D30NZ-3 220v series high frequency switching power supply The manufacturer tells you that when the PWM output control signal passes through the barrier driver to drive the power module, the two sets of diagonal tubes are turned on alternately, and a high-frequency pulse voltage is generated in the primary of the high-frequency transformer, and the secondary voltage is After being transformed by a high-frequency transformer, energy is supplied to the load through rectification.
TH230D30NZ-3 220v series high frequency switching power supply The manufacturer tells you that the output terminal has response circuits such as voltage stabilization, current limiting, current stabilization, and voltage limiting. When placed in a voltage stabilization condition, the voltage stabilization and current limiting circuit take effect. When the output voltage rises or falls, the sampled voltage is compared with the reference voltage through the internal voltage comparator of the stabilization circuit, and the error signal voltage is added to the PWM control circuit , The PWM output pulse width is changed accordingly, and then the output voltage is stabilized. If the load current is too high, the current-limiting circuit works to limit the output current within the current-limiting set value.
Similarly, under steady current conditions, the effect of the steady current circuit keeps the output current stable within the set value, and when overvoltage, the voltage limit circuit clamps the output voltage at the limit voltage value. TH230D30NZ-3 220v series high frequency switching power supply The manufacturer tells you that when there is an abnormal situation (such as input overvoltage or undervoltage, overcurrent or overheating, etc.) when the maintenance signal is added to the maintenance control circuit, the maintenance circuit outputs a voltage and adds it to the PWM The circuit causes the PWM circuit to suspend the output, and then reaches the maintenance intention.