triaczero crossing
I am trying to simulate a circuit for Zero Cross Detection. The end goal is triac phase control. My simulation using proteus hangs up and with message "Simulation is not running in real time" and proteus freezes untill crash.
For the ZCD Circuit, I referred to the following post.
The circuit i am trying to simulate is this
Simulation screen shot:
Is there anything wrong with the circuit or am i not simulating it right?
Please advice.
The calculated angle is accidental, it is not a reliable value. To demonstrate how unreliable is it, imagine that capacitor is 1 pF. The angle will be close to zero, << much less << than 270.
I'd suggest to add optocoupler with high voltage diode and resistor, read zero crossing with accurate estimate of current transfer ratio of optocoupler, known part's delays, and known software delays. Though with high voltages (above 300V) the coupler should be super low current kind, say with LED requiring less than 1 mA to be detectable.
You could try building an ZCD circuit using Transistor. CE configuration. You need to size your AC input voltage to something reasonable using Voltage Divider.
Choose the voltage divider resistors and keep in mind the power dissipation too. Mostly 1/4W resistors will be sufficient.
Triggering Quadrant of Triac
Best Answer
I have tested this that and found that there are something unstable over it. It develops a form of "noise" which disturb the signal. This takes place between every 30 seconds to 1 minute. (Perhaps my setup?)
This is a simple one
Opdate:
About the message "Simulation is not running in real time" here, try the following.
Select 'Set Animation Option' from the menu system and simply push the 'SPICE Options button'. Try to put [ABSTOL] down to, for example 1e-08 and see if it helped.
If it has not helped, try to go further down or if it helped, try to go one up by one until the error recurs, then go one down.