The core function of a pulse power rectifier is to convert alternating current (AC) into controllable pulsed direct current (DC). Its output is not continuous, smooth DC, but rather a pulse waveform with a specific frequency, duty cycle, and amplitude.
Rectification Process
The rectifier first converts AC into unidirectional, pulsating DC using devices such as diodes or silicon-controlled rectifiers (SCRs). The waveform is then smoothed by filtering circuits, but pulse power supplies typically retain or actively modulate the pulsating component to meet specific process requirements.
Pulse Modulation Technology
By controlling the on and off of switching devices (such as IGBTs and MOSFETs), precise regulation of output voltage/current parameters such as frequency, pulse width, and rising/falling edges is achieved. Common modulation methods include:
Pulse Width Modulation (PWM)
Pulse Frequency Modulation (PFM)
Hybrid Modulation Strategies
Classification of Pulse Rectifiers
Type
Features
Application
Single-phase pulse rectifier
Simple structure, low cost, low power
Laboratory equipment, small electroplating equipment
Electroplating and Electrolysis Industries
Pulsed power supplies can significantly improve coating uniformity, density, and adhesion, and are particularly suitable for precious metal electroplating.
Laser Drive Systems
Pulse rectifiers provide highly stable pulse energy for lasers, ensuring output beam quality and repeatability.
Electromagnetic Launch (e.g., electromagnetic guns)
MW-level pulse power is required, and the rectifier must release enormous energy within milliseconds, placing extremely high demands on system response and reliability.
Medical Pulse Devices
For example, pulsed electric field (IRE) technology used in tumor treatment relies on high-precision pulse power supplies to achieve precise cellular-level ablation.
