Recent content by donbcg

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    Merry Go Round Effect - Understand its Physics & Answer Daughter

    Gentlemen, Your humble science intelect required. My daughter and I were riding a merry go round recently and as we were spinning she realized that if she pushed her upper body to the center and back out agian the rpm increased and we spun faster. I am a PLC/PC programmer and haven't...
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    Between d.c generators and a.c generators

    DC generators require full retrace. The positive must flow all the way to the work and back to the generator or battery to cpmplete the circuit causing heat and severe loss. DC requires large conductors and can only be kept at short disyances. AC is sinusodal, or alternates between high and...
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    Calculating Generator Shaft Torque

    Is it true then that there is a direct corelation between motor torque and generator torque? Why is this the same? Shouldn't it take less torque to make rather than use? Let's say I drive the 5K @189RPM generator with a 2.2K@3600 motor geared appr. 18:1. Is it possible to do this?
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    Is now a good time to invest in solar?

    The difference lies in cost benefit ratios. A solar panel is by far the least economical in terms of power production. They can only generate at a 12% - 18% efficiency. The rest is lost to heat. Secondly, the amount of panels to create such a system would be in the nature of 1200 sqft...
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    Calculating Generator Shaft Torque

    Gentlemen, Here is my scenario. I am building a new project utilizing a PMG that produces 5KW at 840V at 189 RPM. The manufacturer is supplying me with a torque curve that does not appear to be correct. They say, at full power extraction it has 350Nm of shaft torque. Is this correct? If so...
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    Gearing a 2.2KW 24000RPM Motor to 200RPM Output Shaft Torque

    I have a 2.2 KW 24000RPM motor i want to gear to 200RPM. What is the effective torque on the output shaft?
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