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Old 05-13-2012, 03:46 AM   #718 (permalink)
nlc
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Quote:
Originally Posted by MPaulHolmes View Post
Someone recommended to me that at relatively low powers (60-70kW haha) 2 sensors is OK. He did another one that was closer to 150kW and used 3 sensors.
In my opinion, the real reason to use 3 sensors on big controller is because the current sensor price is really low compared to the global controller cost, thus it become really interesting to completely protect the third phase semiconductor too.

Because with 2 sensors, the 3 phase outputs can be short circuit protected between each other, but only two of them are short circuit protected between phase and +vbus ou gnd. With the third phase current, all phase can be completely protected (short circuit with an other phase, vbus ou gnd)

Last edited by nlc; 05-13-2012 at 03:51 AM..
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