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Results tagged with power
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user 7701
Electric power is the rate at which electrical energy is transferred by an electric circuit. The SI unit of power is the watt (one joule per second). Use this tag where power is a primary concern for the design under discussion. Use the "low-power" tag when that applies.
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Is the energy flow due to a an alternating current constant or cyclic
Electrical energy flows from energy source to load between the conductors via electromagnetic radiation, which has both wave-like and particle-like properties. Energy only flows in one direction - fr …
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How can AC current power anything?
The picture many people have in their heads is that the power source somehow gives energy to electrons. … Afterall, electrons aren't flowing back and forth 50 or 60 times a second from the lightbulb in your kitchen all the way the way back to the generator at the power plant. …
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DC Motor Efficiency at Fixed Torque
The input power to a motor (any motor, not just DC) is always the voltage at the lead wires times the current into the motor (not I2R). … The output power is, as you said, always speed times torque.
The difference between the input power and the output power will always be greater than zero and is referred to as the losses. …
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How do I find the voltage range for an unknown DC motor?
A simple model for a DC motor is \$V= R*i + e\$, where \$V\$ is the terminal voltage, \$R\$ is the motor resistance, and \$e\$ is the back-emf voltage.
R can be measured as I said above in a commen …
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Accepted
How can I calculate DC motor continuous current?
Regarding your calculations ... 550 W is listed as the maximum output power. This is usually much bigger than the continuous rated power of the motor (which for this motor appears to be 400 W). … Note that the efficiency at maximum power will be closer to 50%, so the current at maximum power will be approximately \$\frac{550 W}{24 V*0.5} = 45.8 A\$.
But these are just estimates. …
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Is Power consumed by a motor under various load conditions constant?
The rating on a motor is the rated power that the motor produces at the shaft. It isn't the power that the motor draws. … Also note that this is the rated power, which means that it doesn't always produce this power, only that this is the maximum power that the motor can safely run at continuously. …
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