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three shunt resistors method of current sensing in 3 phase inverter

shady_mamdouh_2011
Associate II
Posted on May 14, 2015 at 21:16

How can i calculate the phase currents (ia, ib, ic) from the currents of the 3 shunt resistors placed under the lower switches of the inverter?

like in steval-ihm023v3

#steval-ihm023v2
1 REPLY 1
Cesar cfg
Associate II
Posted on May 22, 2015 at 15:58

The IGBT's driver used in the card contains an operational amplifier that gives you a voltage(0 ==>3.3V) proportional to the current just you need the amplifier gain to compute the  current.