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Originally Posted by jonboy
The source of the ultimate amount of energy input to the spring is from the motor that is compressing or stretching the spring. The problem was stated that the motor loading the spring stalled. Bad for the motor but what is even worse the power or energy out from the motor is Zero.
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The power is zero but the torque is maximum.
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Max motor power output is usually when the speed of the motor is loaded down to about 1/3 of max RPM as I remember it.
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The maximum power output occurs at 1/2 maximum rpm.
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Therefore the trick to get the max power available from the motor
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This thread is not about getting maximum power from the motor. It is about storing the maximum energy in the spring. They are two different problems.
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get a “weaker” spring and plan on greater travel for loading it.
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a weaker spring with greater travel at the same stall force would indeed produce more stored energy in the spring.
but greater travel is not
necessary to get greater stored energy: a weaker spring can be used with greater pre-load to stall the motor at the same travel, and this will produce greater stored energy in the spring.
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