Hi guys,
I am designing a solar array fed induction motor pumping system. I will use 100 watt PV panel to run a 0.5hp induction motor pump.The DC link voltage (around 18 -24 volt) will be modulated to AC using a pure sine wave inverter with Space vector modulation. The AC voltage waveform will be less than 20 volt and will be stepped up by a transformer. V/f control will be used for induction motor. Most of the time a DC-DC boost converter is used to extarct maximum power point ,then a inverter is used. So there is no need for transformers for those double power stage systems. But my system will be a single stage system with a inverter and a transformer (no DC-DC converter). Now i have some question on some points:
1. Can i directly use a transformer to step up the voltage from inverter, I mean is there any possibility of destruction of the inverter due to voltage spike?If any then why?
2. Do i need to use any kind of passive filter after inverter to smooth voltage waveform,then fed it to transformer? If yes,then what type of passive filter can be used?
3.Do i need any snubber ? Actually when i am trying to simulate the system in matlab, it suggest me to add a snubber between inverter and transformer and also between transformer and induction motor?pump.
I am designing a solar array fed induction motor pumping system. I will use 100 watt PV panel to run a 0.5hp induction motor pump.The DC link voltage (around 18 -24 volt) will be modulated to AC using a pure sine wave inverter with Space vector modulation. The AC voltage waveform will be less than 20 volt and will be stepped up by a transformer. V/f control will be used for induction motor. Most of the time a DC-DC boost converter is used to extarct maximum power point ,then a inverter is used. So there is no need for transformers for those double power stage systems. But my system will be a single stage system with a inverter and a transformer (no DC-DC converter). Now i have some question on some points:
1. Can i directly use a transformer to step up the voltage from inverter, I mean is there any possibility of destruction of the inverter due to voltage spike?If any then why?
2. Do i need to use any kind of passive filter after inverter to smooth voltage waveform,then fed it to transformer? If yes,then what type of passive filter can be used?
3.Do i need any snubber ? Actually when i am trying to simulate the system in matlab, it suggest me to add a snubber between inverter and transformer and also between transformer and induction motor?pump.