Lenze EMB9352−C Manual do Utilizador descarregar pdf (Página 80)

Dimensioning

Dimension brake chopper and brake resistor



EDBMB935X DE/EN/FR 13.0

Step 3: Calculate the number of brake choppers per brake resistor

Brm

gen,ave

(3s)

@ P

)

Brm

Number of brake choppers per brake resistor

Number of brake resistors

gen,ave

(3 s) Highest average regenerative power over 3 s (Fig. 3)

rated

) Rated brake chopper power, based on switching threshold U

( 75)

Always round the result up to the next integer!

If you want to use only one brake chopper per brake resistor:

ƒ Gradually increase the number of brake resistors in the formula until

Brm

£ 1 (one brake chopper per brake resistor).

 Note!

Technically, both solutions are possible. Please check the solutions

for cost effectiveness.

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Lenze EMB9352−C Manual do Utilizador Página 80