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Styx said:not much to ask...
I have said that the output torque ~15Nm, Torque = i*kt Without any infomation about the torque constant of the machine the current handling of the IGBT's cannot be stated. If the toruqe constant is low the you could need 1000A, but it if is high you could need 10A
panic mode said:it's cheaper if you can use lower voltage such as 230 instead of 480V.
Phasor said:Styx said:not much to ask...
I have said that the output torque ~15Nm, Torque = i*kt Without any infomation about the torque constant of the machine the current handling of the IGBT's cannot be stated. If the toruqe constant is low the you could need 1000A, but it if is high you could need 10A
1000A :shock: unlikely - normal sort of figures for torque constant of this size motor seems to be about 1.0 Nm/A (give or take a bit). Thus the current rating of the IGBTs should probably be 30-40A (allowing a safety factor).
Nigel Goodwin said:panic mode said:it's cheaper if you can use lower voltage such as 230 instead of 480V.
440V is three phase, where each phase is 230V. The 440V is the voltage between phases.