{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Useful Equations

Useful Equations - EML2322L MAE Design and Manufacturing...

This preview shows pages 1–3. Sign up to view the full content.

EML2322L -- MAE Design and Manufacturing Laboratory Useful Motor/Torque Equations for EML2322L Force (N) F = m x a m = mass (kg) a = acceleration (m/sec 2 ) Motor Torque (N-m) T = F x d F = force (N) d = moment arm (m) Power (W) P = I x V I = current (amps) V = voltage (V) P = T x ω T = torque (N-m) ω = angular velocity (rad/sec) Unit Conversions Length: 1 in = 0.0254 m Velocity: 1 RPM = 0.11 rad/sec Torque: 1 in-lb = 0.11 N-m Power: 1 HP = 745.7 W = 550 lb-ft/sec

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Example 1 Determine if the following motor can be used to lift a 5kg load using a 0.5m lever arm. Merkle-Korff Gearmotor specifications Stall Torque = 40 lb-in Stall Current = 3.5 amps Solution Convert stall torque from in-lb to N-m: 1 in-lb = 0.112985 N-m 40 in-lb = 40 x 0.112985 N-m = 4.5194 N-m Calculate the force required to lift the 5-kg load: F = m x a = 5 kg x 9.81 m/s 2 = 49.05 N Calculate the torque required to lift the force with the lever arm: T = F x d = 49.05 N x 0.5 m = 24.525 N-m We cannot perform the lift with this set-up, because the stall torque is smaller than the torque required for the lift. We must either shorten the length of the lever arm,
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}