Lenze EMB9352−C Instrukcja Użytkownika Pobierz pdf (Strona 84)

Dimensioning

Dimensioning examples

Vertical movement



EDBMB935X DE/EN/FR 13.0

5.4.2 Vertical movement

A vertical movement is to be braked (e.g. lowering a hoist).

Provided data:

ƒ U

= 725 V

ƒ Power characteristic in generator mode:

123 4 5 6 t [s]

gen

[kW]

9350br_16c

Fig. 5 Power characteristic in generator mode

Data provided by the diagram:

ƒ Max. regenerative power: P

gen,max

= 11 kW

ƒ Average regenerative power over 3 s: P

gen,ave

(3 s) = 9.33 kW

– In a time range of 3 s, the highest power is provided between t = 2  5 s.

The mean value is calculated for this range. The circumscribed area of

the curve represents the average power.

– Mean value for 3 s: P

gen,ave

= 9 kW

– Mean value for 1 s: P

gen,ave

= (11 kW ˘ 9 kW) × 0.5 / 3 s = 0.33 kW

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Lenze EMB9352−C Instrukcja Użytkownika Strona 84