Editing Motor peak and continuous current limits
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If motor is being driven long enough above continuous current limit, motor temperature will rise to a level where I<sup>2</sup>t will prevent drive from driving current above MCC. | If motor is being driven long enough above continuous current limit, motor temperature will rise to a level where I<sup>2</sup>t will prevent drive from driving current above MCC. | ||
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[[File:Currentlimits graph i2t.png|800px]] | [[File:Currentlimits graph i2t.png|800px]] | ||
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MTC parameter sets the speed of motor temperature change. Larger motors have greater mass which heats up slowly giving them large thermal time constant while small motors heat up very quickly thus their MTC value is low. | MTC parameter sets the speed of motor temperature change. Larger motors have greater mass which heats up slowly giving them large thermal time constant while small motors heat up very quickly thus their MTC value is low. | ||
Physical definition of time constant is the time where measured variable (in this case temperature) has risen to 63% of final settling value under constant driving. | Physical definition of time constant is the time where measured variable (in this case temperature) has risen to 63% of final settling value under constant driving. | ||
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