Closed loop of single phase AC voltage controller

版本 1.0.0 (45.5 KB) 作者: Abdelrahman Farghly
A closed-loop single-phase AC voltage controller improves performance by automatically adjusting the output voltage
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更新时间 2025/5/10

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What Is Closed-Loop Control?
In a closed-loop system:
  • Output is measured and compared to a reference (setpoint)
  • An error signal is generated
  • A controller (e.g., PI controller) adjusts the firing angle of SCRs or Triac to minimize the error
⚙️ System Components of Closed-Loop AC Voltage Controller
1. AC Source
  • Single-phase sinusoidal supply (e.g., 230 V, 50 Hz)
2. Power Electronics
  • Triac or 2 SCRs in anti-parallel
  • Controls conduction angle → adjusts RMS output voltage
3. Load
  • Resistive or RL load (e.g., heater, lamp, fan)
4. Voltage/Current Measurement
  • Measures the actual RMS voltage or power across the load
5. RMS Calculator Block
  • Computes output RMS voltage (can use built-in Simulink blocks or a custom RMS calculator)
6. Controller
  • PI or PID controller
  • Input: error between reference RMS voltage and measured RMS
  • Output: firing angle (α) or control signal
7. Firing Angle to Pulse Generator
  • Converts the firing angle to gate pulses for SCRs or Triac using zero-crossing detection + delay logic

引用格式

Abdelrahman Farghly (2025). Closed loop of single phase AC voltage controller (https://ww2.mathworks.cn/matlabcentral/fileexchange/181112-closed-loop-of-single-phase-ac-voltage-controller), MATLAB Central File Exchange. 检索时间: .

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版本 已发布 发行说明
1.0.0