Hitachi AN091802-1 - Manuals

Hitachi AN091802-1 – Manual in PDF format online.

Manuals:

Manual Hitachi AN091802-1

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Summary

Page 2 - Powering Inverters from DC; Advantage and disadvantages of each connection method.; Case 1 : Connected in parallel to a common DC bus

Powering Inverters from DC It is possible to power inverters from a DC Power source, or to connect the DC Bus of multiple inverters together to achieve energy savings, since inverters in power driving mode can use power from those that are in regeneration mode. [1] Connection method There are severa...

Page 3 - Case 1 : Connected parallel to a common DC net

[2] DC voltage to be supplied Supplied DC voltage should be between the UV voltage and the OV voltage (or BRD ON level) of the inverter. Model name UV level BRD ON level OV level ( regen.) OV level (source) J100 200V class 140Vac ~ 160Vac (V-SET) +137.5V 390Vdc ± 15Vdc 400V class 280Vac ~ 320Vac (V-...

Page 4 - Case 2 : DC Bus connected n parallel to a single AC-fed inverter; Rated current of the main inverter should be higher than; AC input

Case 2 : DC Bus connected n parallel to a single AC-fed inverter Ø Pay attention to the selection of the main inverter(#1) because all the input current flows throughthe rectifier bridge of this inverter. (*2) Ø Need sufficient time for EEPROM to store the data.(Refer to Case 1) Ø Use DC choke. (Ref...

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