Technical Calculation of Power

Gearmotor for chain conveyor drive

In the case of frequent start-stop operation, consider the load factor listed in a calalog.
Click here to refer the load factor listed in a catalog.

Summary of the machine

1.1 Specification of machine

① Gross weight of the carrier
W = kg
② Gross weight of chain or velt
B = kg
③P.C.D of main sprocket wheel, or Diameter of dram
D = mm
④ Frictional resistance
μ =  

1.2. Connecting method with reducer (gearmotor)

 Using a sprocket wheel or a gear  Shaft direct connection

⑤ P.C.D of a sprocket wheel or a gear
P1 = mm
⑥ P.C.D of a sprocket wheel or a gear
P2 = mm

Decision of any condition for input & output

① Motor speed
N = r/min

Decision of conveyance speed and reduction ratio

 In the case that conveyance speed is decided  In the case that redcution ratio is decided

① Speed
V = m/min
②Reduction ratio (calculated value at ①)
Z =  
① Reduction ratio
Z =
② Speed(calculated value at ①)
V = m/min

Caluclation of lead torque

4.1 Input of efficiency

① Efficiency of reducer and gearmotor
ηc =  
② Efficiency of the sprocket wheel or the gear
ηg =  

4.2 Calculation result (load torque and motor power)

③ Load tprque (Converted in a motor shaft)
Tf = N･m
④Conversion from load torque Tf to motor-power Pf
Pf = kW

Calculation of load moment of inertia

5.1 Calculation result (load moment of inertia)

① Moment of inertia of carrier and chain or belt (Converted in a motor shaft)
JW = kg･m2

5.2 The moment of inertia of total load

 Input mass of sprocket, drum, gear etc.  Weight of sprocket, drum, gear etc is unknown

② Total weight of sprocket wheel and dram (Wd)
Wd = kg
③ Input the inside diameter D1=□mm in the case of the hollow type drum.
D1 = mm
④ Moment of inertia of sprocket wheel or drum P2 (Converted in a motor shaft)
jd = kg･m2
⑤ Total weight of sprocket wheel and gear (P1)
Wp1 = kg
⑥ Total weight of sprocket wheel and gear (P2)
Wp1 = kg
⑦ Moment of inertia of sprocket wheel or gear (Converted in a motor shaft)
 
 
Jp1 = kg･m2
 
Jp2 = kg･m2
② Moment of inertia of sprocket wheel or gear (Converted in a motor shaft)
Jp1+Jp2 = kg･m2
⑤ Calculating the moment of inertia of total load(Converted in a motor shaft)
Jf = kg･m2

Temporary selection of motor

6.1 Type of motor

 Motor: Standard type  For inverter drive

① Motor power
kW × P
② Brake
 
③ Pattern of operation
 
 

Pattern of operation

Commercial power supply
A = sec
 
B = sec
Inverter control
C = sec
 
D = sec
 
E = sec
 
B = sec