Lenze DSD Manual do Utilizador descarregar pdf (Página 117)

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Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23 117

7Applications

7.8 Hoist drive without counterweight

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Ascertainment of the active cable mass

The active cable mass is ascertained by means of the mass calculator (field: cylinder) and is calculat-

ed with the following equation:

[7-87] Equation 11: Active cable mass for the stationary torque

Ascertainment of the height difference

For the stationary torque the maximum height difference Δh is required.

[7-88] Determination of Δh

Torque loss

For including the losses for the hoist the friction torque is calculated from the individual efficiencies.

When carrying out a dimensioning process with a user-definable motion profile, the efficiency for a

travel with the maximum stationary torque is assumed.

• The sign is considered with the fraction n/|n|.

• The following equation calculates the torque loss in generator and motor mode:

[7-89] Equation 12: Torque loss

Torque of the application

[7-90] Equation 14: Torque of the application

acv Rop,

Rop

Δh10π

Rop

200

-----------





⋅⋅⋅⋅=

• The height Δh typically is the height differ-

ence from the winding drum to the cable

end of the payload at the lowest position

of the payload.

• The yellow highlighted cable sections

(+) are decisive for the steady-state

torque.

• The other cable sections (+) cancel

each other out.





Gdn

Pll

Cor

⋅⋅

-----------------------------------------

1–





max M

sds

()

------

⋅⋅=

App

sds

sum

α M

+⋅+=

1 2 ... 112 113 114 115 116 117 118 119 120 121 122 ... 495 496

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