87Hz operácia na menicoch siemens

[sawo333]

Chcel by som sa spýtať ako sa motor zapojí v tomto prípade, poprípade aj fotku zapojenia.

Dakujem

[Drakoush]

Zapojí sa podľa pokynov výrobcu.

[sawo333]

No v tomto prípade moc o tých pokynoch práve nevem, viem len ze siemens starter vas nepusti ďalej pokiaľ nedáte že je to trojuholník 230V pri zaskrknuti 87 Hz. Tak práve preto sa pýtam nemajte to za zlé.

[OK1IN]

Měnič má manuál a tam je to jasně dané. Nenapsal jsi nic bližšího (jaký motor, jaký měnič), tudíž se nedočkáš ani bližší odpovědi...

[Dolfi]

My nemajte to za zlé. No akosi informácie z teba lezú ako z chlpatej deky. A vešteckú guľu sme kdesi zapatrošili ...

To o akej 87 Hz operácii píšeš, na akom meniči (myslím vstup a výstup), s akým motorom ? Asi ten menič si kontroluje prípadné "kraviny" od obsluhy ...

[clim-ber]

Je to nejaka funkcia tychto Micromasterov

"87Hz characteristic" This operating mode is possible for motors that, at the rated frequency, can be connected-up both in a star as well as a delta circuit configuration. The star circuit configuration with a voltage that is lower by a factor of root (3) is used which means that the speed can therefore be increased by a factor up to root (3) of the motor frequency (87Hz) at an almost constant torque. For this operating mode, e.g. a 230 / 400V motor is connected-up in the ̈ circuit configuration (50Hz / 230V) - however, the frequency inverter is parameterized for 87Hz / 400V (for a 400V line supply voltage). For the motor, this means that from the rated motor frequency (50Hz / 230V), the voltage is continuously increased up to almost fmax = 87Hz. This means that the motor is not operated in the field-weakening range, but instead operates with a constant flux.