Three-phase voltage inverter (some questions)

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Three-phase voltage inverters are complex devices that require a solid understanding of electrical engineering principles. To gain knowledge, it's recommended to start with visual resources like Google Images to explore circuit diagrams and configurations. Additionally, seeking out educational websites, online courses, and textbooks focused on power electronics can provide valuable insights. Engaging in forums or discussion groups dedicated to electrical engineering may also yield helpful information and answers. Understanding these concepts is crucial for effectively tackling related questions and assignments.
polibuda
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Homework Statement
Three-phase voltage inverter. How many instantaneous values can: phase-to-phase voltage, phase voltage, control signal, phase current in the case of a symmetrical load RL connected in a star without a neutral conductor? How many combinations of transistors of such a converter are there? Which give the same output voltage?
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lack
I have no idea how to answer to these questions. Our teacher has given it to solve, but i don't know where I sholud to search informations. Could somebody recommend me valuable sources of knowledge?
 
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I would probably start with a Google Images search on the circuits for 3-phase power inverters, and see where that leads me... :wink:
 
Thread 'Chain falling out of a horizontal tube onto a table'

Thread 'Chain falling out of a horizontal tube onto a table'

My attempt: Initial total M.E = PE of hanging part + PE of part of chain in the tube. I've considered the table as to be at zero of PE. PE of hanging part = ##\frac{1}{2} \frac{m}{l}gh^{2}##. PE of part in the tube = ##\frac{m}{l}(l - h)gh##. Final ME = ##\frac{1}{2}\frac{m}{l}gh^{2}## + ##\frac{1}{2}\frac{m}{l}hv^{2}##. Since Initial ME = Final ME. Therefore, ##\frac{1}{2}\frac{m}{l}hv^{2}## = ##\frac{m}{l}(l-h)gh##. Solving this gives: ## v = \sqrt{2g(l-h)}##. But the answer in the book...
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