Drive Kinematics and Electric Motor Selection

Enter the driven machine data — belt pull and speed or power and speed — and the drive layout. The calculator finds the efficiency and required power, offers motors at 3000, 1500, 1000 and 750 rpm, splits the ratio and fills in the shaft speed, power and torque table.

Procedure

Driven machine: P = Ft·v, n = 60 000·v / (π·D); for a chain conveyor D = p / sin(180°/z).
Efficiency η = product of all elements: enclosed spur/helical gear 0.97, bevel 0.96, worm 0.8, V-belt 0.95, chain 0.93, coupling 0.98, bearing pair 0.99.
Required power P_req = P_out / η; pick a motor with P_nom ≥ P_req.
For each synchronous speed compute u = n_nom / n_out and split it between the open drive and the gearbox within recommended limits.
Shaft table: n = n_prev / u, P = P_prev·η, T = 9550·P / n.

Motor catalogue: AIR induction motors (Sheinblit textbook table); nominal speeds vary slightly between manufacturers.

FAQ

How do I select a motor for a conveyor drive?

Divide the driven machine power by the drive efficiency and take the next larger standard motor whose speed keeps all ratios within limits.

How is the drive efficiency found?

Multiply the efficiencies of all gears, couplings and bearing pairs along the power flow.

How is the overall ratio split?

Take the gearbox ratio from the standard series and the open drive ratio as u_total / u_gearbox.

How do I find the shaft torque?

T = 9550·P / n (N·m, P in kW, n in rpm).

What comes next?

Design the gearbox gears from the output torque and ratio — the link under the solution passes the data on.