Question

A DC motor is specified to have a stall torque, Tstall of 10 in-lbf and a no-load speed, ωNL = 100 RPM. a. What is the maximum power output of this motor in in-lbf/s? In Horsepower? In Watts? b. What is the equation of torque, T, in terms of angular speed, ω? 

          A DC motor is specified to have a stall torque, Tstall of 10 in-lbf and a no-load speed, ωNL = 100 RPM. 

a. What is the maximum power output of this motor in in-lbf/s? In Horsepower? In Watts? 

b. What is the equation of torque, T, in terms of angular speed, ω?
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University Physics with Modern Physics
University Physics with Modern Physics
Hugh D. Young 14th Edition
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A DC motor is specified to have a stall torque, Tstall of 10 in-lbf and a no-load speed, ωNL = 100 RPM. a. What is the maximum power output of this motor in in-lbf/s? In Horsepower? In Watts? b. What is the equation of torque, T, in terms of angular speed, ω?
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Transcript

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00:01 Hi, first question you have a motor has a back amf of 110 volts and an amateur current 90 ampers and it's running at 1 ,500 revolutions minutes wanted to determine the power and the talk so for the power is equal to the back amf times an amateur current this is equal to 110 times 90 which is 9 ,900 watts, to 9 .9 kilowatts.
01:07 Now for the torque, we have that the power is equal to times the angular velocity.
01:21 And we're giving the angular velocity as 1 ,500 revolutions per minute.
01:30 So we're going to convert this to radiance per second...
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