Hello,
I'm trying to analize again the pros and cons of the circuit attached. It's not been simulated yet. But some people have told me that it might not work and some of them say it will work. But I want to really analyze what could be happening in the circuit in real life.
First, a signal at PB7 (R3) should be applied by a microcontroller in order to activate the optotriac. The optotriac will then enable the power triac to let the 120VAC feed the bridge rectifier. The bridge rectifier is the GBPC3506 (If= 35A), the power triac is Q6035RH5, which is 3Q, IT(RMS) = 35A. The bridge rectifier output will then be filtered by two 2200uF capacitors (4400uF in total). The two resistors and the led after the bulk capacitors are like a bleed path.
So, the question is if this circuit can handle the inrush current, (I really don't know how much it would be). It has zero crossing, which can probaly help limiting the inrush. How much would be the steady state filtered voltage? I will be soon implementing this circuit in real life (PCB), so I want to make sure first that I don't mess anything. That's why I've been asking this several times until I'm totally clear of what will be happening in this circuit.
I've seen four ways to control a DC motor:
1- The unfiltered half-wave Silicon Controlled Rectifier (SCR) control
2- The unfiltered full-wave SCR control
3- The filtered full-wave SCR control
4- A filtered Pulse Width Modulation (PWM)
I've chosen the number 4: Filtered PWM.
I'm trying to analize again the pros and cons of the circuit attached. It's not been simulated yet. But some people have told me that it might not work and some of them say it will work. But I want to really analyze what could be happening in the circuit in real life.
First, a signal at PB7 (R3) should be applied by a microcontroller in order to activate the optotriac. The optotriac will then enable the power triac to let the 120VAC feed the bridge rectifier. The bridge rectifier is the GBPC3506 (If= 35A), the power triac is Q6035RH5, which is 3Q, IT(RMS) = 35A. The bridge rectifier output will then be filtered by two 2200uF capacitors (4400uF in total). The two resistors and the led after the bulk capacitors are like a bleed path.
So, the question is if this circuit can handle the inrush current, (I really don't know how much it would be). It has zero crossing, which can probaly help limiting the inrush. How much would be the steady state filtered voltage? I will be soon implementing this circuit in real life (PCB), so I want to make sure first that I don't mess anything. That's why I've been asking this several times until I'm totally clear of what will be happening in this circuit.
I've seen four ways to control a DC motor:
1- The unfiltered half-wave Silicon Controlled Rectifier (SCR) control
2- The unfiltered full-wave SCR control
3- The filtered full-wave SCR control
4- A filtered Pulse Width Modulation (PWM)
I've chosen the number 4: Filtered PWM.
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