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Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23 119

7Applications

7.8 Hoist drive without counterweight

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7.8.2 Data for the entry

7.8.2.1 Diameter of cable drum

7.8.2.2 Reeving, load

Cable guided hoists have both simple- and multi-cable guides via guide pulleys, so-called reevings

(pulley block principle). For multi-cable guides, the circumferential speed of the cable drum is an in-

teger multiple of the lifting speed. Here, the required torque on the cable drum decreases by the

reeving factor N

and the speed increases by this factor.

The reeving has no impact on the drive power (except for highly dynamic movements).

[7-92] Reeving

7.8.2.3 Mass of hoisting cage

7.8.2.4 Efficiency of the cable drum

Symbol Description

Cor

Diameter of the cable drum without cable

Symbol Description

The reeving of the cable to the payload.

• The reeving is the ratio of cable velocity of the cable drum to the lifting speed of the payload.

 Reeving for a cable guide via guide pulleys. The reeving factor N

in this case is 4 ().

Symbol Description

Cbn

Mass of the hoisting cage for the payload

• Value can be entered directly or calculated using the mass calculator.

Mass calculator

( 405)

Symbol Description

Cor

Efficiency limited by friction between cable drum and cable

1 2 ... 114 115 116 117 118 119 120 121 122 123 124 ... 495 496

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