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Taner said:Hi Friends,
I was built this inverter circuit and test it. The circuit works fine.
But there still have some finishing works in software.
I will be complete the software soon, i hope.
I was attach a pictures of the PCB with some soldered components (without power transistors, current transformer and output LC-filter).
Best regards.
Taner
Taner said:Hi mvs sarma,
Thank you very much, but only the electrical circuit is mine,
PCB was designed from my friend.
Current transformers secondary side has a two load resistors: R8=100 for high range and R18=1.5k for low range. They are in the feedbacks of two OPAMPs (U1A and U1C).
Best regards.
Taner.
i appreciate your effort and time. the above explanation has revealed my misconception. To further clarify the above, 1. can i subsequently refer to Q1 and Q3(running on 20khz PWM signal) as High MOSFETS While Q5 and Q7(running 50Hz) as Low MOSFETS. 2. Pls, how is the 50Hz running Q5 and Q7 generated? 3. What are the switching patterns of the 4 transistors?. i mean which group switch on and off together. i will be grateful if these doubts are cleared."In this inverter we have a full-bridge power circuits with 4 transistors (paralleled-8 transistors), Q1, Q3, Q5 and Q7.
Two of transistors works with low frequency - 50Hz (Q5 and Q7) depending on the state of the A/B (direction) signal (RC1). Other two transistors (Q1 and Q3) works with high-frequency (20kHz) of the sinewave PWM signal.
Best regards.
Taner "