The DC stabilized power supply includes three components: the power circuit, the low-pass filter, and the voltage stabilization circuit. The inverter circuit converts the input AC current into a pulsating DC power supply, yet it still contains some components of pulsating AC current. To better obtain a stable DC power supply, a low-pass filter is added after the inverter circuit to eliminate the majority of single-pulse AC current components. Aeronautical Power Supply
Low-pass filters are still unable to remove all communication components in detail, thus a small portion of pulsating communication components remain in the output current. These pulsating communication components are referred to as ripple. After undergoing stabilization treatment by a voltage regulator in the subsequent voltage regulation circuit, the ripple voltage is significantly reduced. However, the degree of conversion to DC is not entirely proportional to the voltage regulator index S. 36V Avionics Power Supply
In our country, the DC frequency is 50Hz, therefore, the ripple working voltage is measured in multiples of 50Hz or non-negative integers of 50Hz. Whether to take 50Hz or multiples of 50Hz depends on the type of inverter circuit. For half-wave rectification, we use 50Hz; for full-wave rectification, we use double the 50Hz, which is 100Hz; for three-phase half-wave rectification, we use triple the 50Hz, which is 150Hz; and for three-phase full-wave rectification, we use six times the 50Hz, which is 300Hz.
Three common reasons for difficulties in the working voltage of a stable power supply system for alternating current power supplies are: 1) Issues with the voltage stabilizing equipment in the power generation unit of the power plant, causing fluctuations in the output voltage. This is usually the case for small and medium-sized hydropower plants. 2) Problems with the characteristics of the distribution transformer in the substation or substation, particularly in those that are old and brittle. 3) The total power consumption in the region greatly exceeds the load of the power supply system, leading to a continuous decrease in the working voltage of the power supply system. In severe cases, this can even cause the power system's power to be slightly low, resulting in a paralysis of the power grid and large-scale power outages! 400HZ power supply
