I am supposed to give a presentation on VFD
so i thought of having a Load commutated inverter circuit simulated.
so i first tried to make an inverter circuit using matlab simulink
the problem that i am encountering is when i turn on a SCR it is supposed to remain on until it gets reverse biased (right?)
so how do i turn it off in case of an inverter which has constant polarity DC at its input?
i gave firing using a pulse generating circuit which had an on for 10 % of cycle and i kept the firing pulse period = o/p voltage frequency?
but i only got the desired o/p for first cycle(only monitored one phase )
after which the SCR remained on, any ideas on what i might be doing wrong?
did i set the firing times incorrectly?(i'll post all details if required -amplitude,Ton
circuit i designed and waveform that i obtained )
so i thought of having a Load commutated inverter circuit simulated.
so i first tried to make an inverter circuit using matlab simulink
the problem that i am encountering is when i turn on a SCR it is supposed to remain on until it gets reverse biased (right?)
so how do i turn it off in case of an inverter which has constant polarity DC at its input?
i gave firing using a pulse generating circuit which had an on for 10 % of cycle and i kept the firing pulse period = o/p voltage frequency?
but i only got the desired o/p for first cycle(only monitored one phase )
after which the SCR remained on, any ideas on what i might be doing wrong?
did i set the firing times incorrectly?(i'll post all details if required -amplitude,Ton
circuit i designed and waveform that i obtained )
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