Gearbox Torque vs Input Speed     


Consider the following gearbox input velocity, n, and output torque, T, profiles:

Maximum Output Torque Utilization

Where SF = Shock Factor
 

Nominal Output Torque Utilization

Actual Duty Cycle, ED

 

Maximum Output Torque Curve Rating

  • Gearbox manufacturer rated maximum output torque vs input speed

Nominal Output Torque Rating

  • Gearbox manufacturer rated nominal output torque vs input speed

Nominal Output Torque at Mean Input Speed

  Type 0: Dwell, Exp=3, T2N>T2n if ED>EDcont

  • If the actual duty cycle EDActual >= EDContOperation, then the calculated nominal output torque and mean input speed must fall within the manufacturer’s specified nominal rating.
  • Nominal output torque and mean input speed are calculated as follows:
 

Nominal output torque

 

Mean input speed

 
  Type 1: No dwell, Exp=3, T2N>T2n always

  • The calculated nominal output torque and mean input speed must fall within the manufacturer’s specified nominal rating.
  • Nominal output torque and mean input speed are calculated as follows:
 

Nominal output torque

 

Mean input speed

 
  Type 2: No dwell, Exp=10/3, T2N>T2n always

  • The calculated nominal output torque and mean input speed must fall within the manufacturer’s specified nominal rating.
  • Nominal output torque and mean input speed are calculated as follows:
 

Nominal output torque

 

Mean input speed

 
  Type 3: Dwell, Exp=3, T2N>T2n always

  • The calculated nominal output torque and mean input speed must fall within the manufacturer’s specified nominal rating.
  • Nominal output torque and mean input speed are calculated as follows:
 

Nominal output torque

 

Mean input speed

 
  Type 4: Dwell, Exp=10/3, T2N>T2n always

  • The calculated nominal output torque and mean input speed must fall within the manufacturer’s specified nominal rating.
  • Nominal output torque and mean input speed are calculated as follows:
 

Nominal output torque

 

Mean input speed

 
  Type 5: No dwell, Exp=3, T2N>T2n if ED>EDcont

  • If the actual duty cycle EDActual >= EDContOperation, then the calculated nominal output torque and mean input speed must fall within the manufacturer’s specified nominal rating.
  • Nominal output torque and mean input speed are calculated as follows:
 

Nominal output torque

 

Mean input speed

 
  Type 6: Dwell, Exp=10/3, T2N>T2n if ED>EDcont

  • If the actual duty cycle EDActual >= EDContOperation, then the calculated nominal output torque and mean input speed must fall within the manufacturer’s specified nominal rating.
  • Nominal output torque and mean input speed are calculated as follows:
 

Nominal output torque

 

Mean input speed

 
  Type 7: No dwell, Exp=10/3, T2N>T2n if ED>EDcont

  • If the actual duty cycle EDActual >= EDContOperation, then the calculated nominal output torque and mean input speed must fall within the manufacturer’s specified nominal rating.
  • Nominal output torque and mean input speed are calculated as follows:
 

Nominal output torque

 

Mean input speed

 

Move Profiles of Output Torque vs Input Speed

  • Clearly illustrates when a design is near or exceeds rated maximum output torque and/or input speed
     

Inertia Mismatch

Where:
  iT2 Transformation 2 ratio
  iGB Gearbox ratio
  iT1 Transformation 1 ratio
  JDM Load inertia at the drive mechanism input
  JT2 Transformation 2 inertia at the input
  JGB Gearbox inertia at the input
  JT1 Transformation 1 inertia at the input
  JBr Motor brake inertia
  JM Motor rotor inertia

Specify the the gearbox speed display at the input (n1) or output (n2)
 

Specify the numbers of Gearboxes in parallel

 

 

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