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Originally Posted by fox46
Whatever the capacitor is in the middle of the ring of transistors is.
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Here's the FET bridge portion of the Black Jag. As you can see, there is no filter capacitor on the Jag's output.
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I agree but seems like this is much more than a basic AC circuit
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With the rotor stalled (which is what we're discussing) it's just a switched LR circuit.
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The original purpose of the OP's question was to determe if it was acceptable to stall the RS775 at 20% power.
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Correct.
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My OPINION is that it is not acceptable, but by all means, go for it- you are only burning up 40W right?
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I do not know how long the RS775 can tolerate 40W without overheating. I suggested to Leav that he run some low-power tests to determine at what point the motor starts to become uncomfortably warm to the touch.
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Last I checked, a 20% position of a joystick did not result in a 4% robot speed.
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I don't know where you got that from. I hope you do not think I am claiming that.
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Let me know what your simulation shows.
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I already ran the simulation with 20 uH and it shows 40 watts. I do not know what the actual inductance is but I
suspect it is higher than that.