Control objectives and classification analysis of pulse rectifiers
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Control objectives and classification analysis of pulse rectifiers

Posted Date: 2024-01-27

What is the control objective of a pulse rectifier?

The control goal of the pulse rectifier is to convert the input pulse signal into a DC signal and reduce the output pulsation and fluctuation as much as possible. Specifically, the control objectives of the pulse rectifier can be summarized as follows:

1. Rectification: The main goal of the pulse rectifier is to convert the input AC pulse signal into a DC signal. Through appropriate control, only current in one direction is transmitted, while current in the reverse direction is blocked or reduced to a minimum.

2. Smooth output: After the pulse rectifier converts the pulse signal into a DC signal, the output voltage or current will still have fluctuations and pulsations. The control goal is to reduce the pulsation of the output signal as much as possible so that the output signal becomes more stable.

3. Maximum power transfer: An important goal of pulse rectifier control is to achieve maximum power transfer efficiency. By adjusting the control parameters of the pulse rectifier, the power supply can efficiently transmit energy to the load, thereby maximizing the power transfer efficiency.

4. Response speed: Pulse rectifiers need to have a fast response speed and be able to quickly adjust control parameters to adapt to different input conditions and load requirements. Therefore, the control objectives also include achieving faster response and stable control performance.

The control goal of pulse rectifiers is to achieve efficient, smooth and stable signal conversion to meet the needs of specific applications and to maximize power transfer efficiency.

Characteristics of pulse rectifiers

·Pulse rectifier is a rectifier that works in pulse width control (PWM) mode, also known as four-quadrant converter. Compared with phase-controlled rectifiers, it has the following advantages:

1. The power factor is high, AC side cos=±1;

2. Low harmonic content, AC side current close to sinusoidal; Small size, light weight, fast dynamic response.

Pulse rectifiers are classified according to voltage and current conditions on the DC side

Pulse rectifiers and DC rectifiers are two different electronic devices with different functions and characteristics.

Pulse Rectifier: A pulse rectifier is a device used to convert a pulse signal into a DC signal. Its main feature is that the input signal is a pulse signal and the output signal is a DC signal. Pulse rectifiers usually use switching elements (such as diodes) to control the current. By rectifying the required part of the pulse signal, that is, only retaining the positive half-cycle or negative half-cycle signal, the signal is converted. The main application scenarios of pulse rectifiers are electronic systems that need to extract useful information from pulse signals, such as communication systems, sensors, etc.

DC Rectifier: A DC rectifier is a device used to convert AC signals into DC signals. Its main feature is that the input signal is an AC signal and the output signal is a DC signal. DC rectifiers usually use a rectifier bridge circuit (such as four diodes) to rectify the AC signal, that is, convert it into a current with only one direction. The main application scenario of DC rectifier is to convert AC power into DC power to supply electronic equipment, battery charging, etc.

Therefore, pulse rectifiers and DC rectifiers differ in the type of signals they process and the way they are converted. Pulse rectifiers are mainly used to extract useful information from pulse signals, while DC rectifiers are mainly used to convert AC signals into DC signals.

Review Editor: Huang Fei


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