The rectifier module is a part of the switching power supply system in the communication inverter power supply, and it is also the core part. So what is the basic working principle of the communication power rectifier module? The editor of EVEREXCEED will teach you some knowledge below.

The working principle of the high-frequency switching rectifier (rectifier module) is that after the commercial power is directly rectified by the diode, the DC power is converted into a high-frequency AC current through a power factor correction circuit and a power conversion circuit, and then the high-frequency rectified into the required low-voltage ^{DC power supply}.

1. Main circuit

The whole process of inputting from AC grid and outputting DC, including:

a. Input filter: its function is to filter out the clutter existing in the power grid, and also prevent the clutter generated by the machine from being fed back to the public power grid.

b. Rectification and filtering: The AC power of the grid is directly rectified into a smoother DC power for the next-level transformation.

c. Inverter: Convert the rectified direct current into high-frequency alternating current, which is the core part of the high-frequency switching power supply. The higher the frequency, the smaller the ratio of volume, weight and output power.

d. Output rectification and filtering: according to the needs of the load, provide a stable and reliable DC power supply.

2. High frequency switching power supply control circuit

a. On the one hand, take samples from the output end, compare with the set standard, and then control the inverter to change its frequency or pulse width to achieve stable output; on the other hand, according to the data provided by the test circuit, the protection circuit identifies , Provide control circuit to carry out various protection measures for the whole machine.

b. High frequency switching power supply detection circuit

In addition to providing various parameters in operation in the protection circuit, it also provides various display instrument data.

c. High frequency switching power supply auxiliary power supply

d. Provide the different requirements power supply for all single circuits.

3. According to the control principle, there are four ways:

a. Pulse Width Modulation (Pulse Width Modulation, abbreviated as PWM)

The switching period is constant, and the duty cycle is changed by changing the pulse width.

b. Pulse Frequency Modulation (Pulse Frequency Modulation, abbreviated as PFM)

The turn-on pulse width is constant, and the duty cycle is changed by changing the switching frequency.

c. Pulse Density Modulation (Pulse Density Modulation, abbreviated as PDM)

The on-pulse width is constant, and the voltage regulation is achieved by changing the number of pulses.

d. Hybrid modulation

The on-pulse width and the switching frequency are not fixed, and can change each other. It is a mixture of the above two methods.

The high-frequency switching power supply can theoretically reduce the switching loss to zero without greatly increasing the switching speed and the noise is also small.

If you have any requirements or any kind of query regarding the rectifier solutions for your applications, feel free to communicate with our dedicated team at any time at marketing@everexceed.com.