Hitachi AN091802-1 manual

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Table of contents for the manual

  • Page 1

    Application Note:  Powering Inverters from a  DC Supply Hitachi America, Ltd. AN091802-1 Please refer also to the Inverter Instruction Manual © 2002 Hitachi America, Ltd.[...]

  • Page 2

    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 several ways for DC bus connection of the inverters. (Ex[...]

  • Page 3

    [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-SET) +275V 780Vdc ± 30Vdc J300 200V class 140Vac[...]

  • Page 4

    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 through the rectifier bridge of this inverter. (*2) Ø Need sufficient time for EEPROM to store the data. (Refer to Case 1) Ø Use DC choke. (Refer to Case 1) <Selection of the main inve[...]