Examples of installation & Application

icon_01.gif Basic Design and Operation    icon_01.gif Structure    icon_01.gif Examples of installation & Application


icon-02.gifHow To Select :

item-01.gif Model selection in a basis of tension
      1-1 Three factors must be determinated, the formula is listed below:
            a.Torque T= F*(D/2)…………………………………… (Nm)
            b.Speed N=V /(π*D)……………………………… (r/min)
            c.Kinetic Power P=0.105*T*Nr …………………………… (W)
          F: tension(N)  V: Linear Velocity(m/min)  D: Roller Dia(m)
           Nr: Slip Speed of clutch/brake (r/min) (Clutch: speed difference at clutch input and clutch output; Brake: speed at brake input)
     1-2 The general instruction for selection of specification of clutch/brake:
  Confirm the use condition (linear speed、tension、roller Dia.) → Calculate the Maximum kinetic power (watt) → Calculate the roller torque → Calculate the roller speed → Calculate the clutch/brake torque → Calculate the clutch/brake speed → Calculate the clutch/brake slipping speed → Clutch/brake model is selected
item-02.gifNotes for Selection
      2-1 Torque:The adjustable torque range of hysteresis clutch/brake is between drag torque and rated torque. Please do consider the clutch/brake torque (maximum and minimum) is within the adjustable torque range (as close to the rated torque as possible). The optimized use is within 3%~100% of the torque range.
      2-2 Speed: The maximum clutch/brake speed must be lower than the allowable speed.
      2-3 Kinetic Power:Continuous slip causes high heat on hysteresis clutch/brake. Please note that the kinetic power during operation must be less than the allowable kinetic power of selected clutch/brake model.
item-03.gif Example of Model Selection

      Take the film roller as the output of hysteresis brake to explain how to select hysteresis brake.

      Example 1:
     Linear Velocity =200m/min consistent,Tension F=2.0N consistent
  Roller Dia. D=500mm
      a.Toqure (T):Torque (at the beginning and the end of operation) at tension 100N
      T=(D/2)*F=[(500*10^-3)/2]*2=0.5 Nm
  b.Speed (N):Brake speed (at the beginning and the end of operation) at linear velocity 200m/min
  N=V/(π*D1)=200/(π*500*10^-3)=128 r/min
      c.Kinetic Power (P)
  P=0.105*T*Nr=0.0167*F*V=0.0167*2*200=6.68 W
      d.Model Selection
  Calculated torque is 0.5NM which is 50% of the rated torque of CHB010AA. Per calculated torque (T) and kinetic power, CHB010AA is selected.

      Example 2:
      Given (please refer to the diagram below) 
      Maximum Linear Velocity (Vmax)=350m/min,
  Minimum Linear Velocity (Vmin)=250m/min
      Maximum Roller Dia. (D1)=550mm, Minimum Roller Dia. (D2)=100mm
      Tension F= 5N consistent, Reduction Ratio 2:1
      a. Brake Torque (T) and Brake Speed (N) at the start
  T=(5*550*10^-3)/2=1.38 Nm
  a-1.Brake Torque (T) at increasing ratio 1: 2 
  T=1.38*(1/2)=0.69 Nm 
      N=350/(π*550*10^-3)=202.7 r/min
      a-2.Brake Speed (N) at increasing ratio 1: 2
  N=202.7*2=405.4 r/min 
      b. Brake Torque (T) and Brake Speed (N) at the end of operation
      T=(5*100*10^-3)/2=0.25 Nm
      b-1.Brake Torque (T) at increasing ratio 1: 2
  T=0.25*(1/2)=0.125 Nm
  N=350/(π*100*10^-3)=1115 r/min
  b-2.Brake Speed (N) at increasing ratio 1: 2
      N=1115*2=2230 r/min 
      c. Maximum and Minimum Speed
  Nmax=350/(π*100*10^-3)*2=2230 r/min
      Nmin=250/(π*550*10^-3)*2=290 r/min
  d. Maximum and Minimum Brake Torque
  Tmax=(5*550*10^-3)/2*(1/2) =0.69Nm
  Tmin=(5*100*10^-3)/2*(1/2)=0.125 Nm
      e. Maximum Kinetic Power
  Pmax=0.0164*5*350=28.7 W
  f. Model Selection
     Calculated maximum kinetic power: 28.7W -> less than 38W
     Calculated maximum brake torque: 0.69NM -> less than 1.0NM
     CHB010AA is selected
  Diagram 1
 icon-02.gifOperating Guidelines
item-01.gif Shaft
      Please do not knock the brake shaft. Refer tolerance to H7/h7 for install shaft, and do pay attention to the concentricity and perpendicularity between two shafts when they are connected.
item-02.gifMounting screws
      Please use anti-loose washers or adhesives on mounting screws to prevent screws from loose when vibration.
item-03.gifInstallation surface
  The tolerance of perpendicularity and concentricity between mounting flange and shaft must be within 0.05mm T.I.R. to keep the rotor from rubbing the inner/outer poles.
item-04.gifResidual magnetism
      After the operation is stopped, due to residual magnetism torque will still remain at low-speed rotation. Please cut off the power and keep running brake at approx 100 rpm for 1 minute to eliminate the residual magnetism.