Appendix B

International English

Moment of Inertia

The load moment of inertia can be referred to the motor shaft

J*load = Jload/ I2 or

J*load = Jload. (Nload)2/ (Nmotor)2

Output Power

Output Power = (Input Power) X (Gearbox efficiency)

Output Torque

Output Torque = (Input Torque) X (Gearbox efficiency)/ (Gearbox Ratio)

Conveyor Applications

Mass M

Velocity

Pulley Speed

 

 

 

 

rpm

Retarding Force

 

Radius

(Friction or Gravity)

 

Figure B-2 Practical Assemblies. Conveyor

Accelerating Torque = Mass X Velocity

Steady state Torque = Retarding Force X Radius

Velocity = 2.p.Radius X Pulley Speed.

Power = Retarding Force X Velocity

Moment of inertia = Mass X (Velocity )2 + Pulley etc.

Hoist Applications.

A hoist is a vertical conveyor where the Retarding force is gravity.

Steady state Torque = Retarding Force X Radius

=Mass X g X Radius.

Power = Mass X g X Velocity

Moment of inertia = Mass X (Velocity )2 + Pulley etc

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MICROMASTER Applications Handbook