I-DRIVE TECHNICAL MANUAL – PROGRAMMING PG DRIVES TECHNOLOGY
Boost Drive Current Sets the maximum current available during the boost period.
Boost Drive Time This sets the period for which the Boost Drive Current will be available.
Boost Drive Current can be set in 1A steps between 10A and 180A but not less than the Current Limit Max. setting.
Boost Drive Time can be set in 1-second steps between 0 and 10 seconds.
The following table shows the maximum permissible values for Current Limit Max. & Min., Boost Drive Current and Boost Drive Time
for each of the i-Drive family variants.
Model i45 i70 i140 i180
Current Limit Max. 45 Amps 60 Amps 120 Amps 180 Amps
Boost Drive Current 45 Amps 70 Amps 140 Amps 180 Amps
Boost Drive Time 10 seconds 10 seconds 10 seconds 10 seconds
Current Limit Min. 45 Amps 55 Amps 120 Amps 180 Amps
8.3 Current Foldback Threshold, Current Foldback Time, Current Foldback Level and Motor Cooling Time
The parameters Current Foldback Threshold, Time, Level and Motor Cooling can be used to protect the motor from overheating.
If the motor current exceeds the value set by Threshold for a period set by Time, then the i-Drive’s current output will be reduced
to a value set by Level. After this has occurred, full current is only permissible after a time period set by Motor Cooling.
Current Foldback Threshold Adjustable between 1A and the value of Current Limit Max. in steps of 1A.
Current Foldback Time Adjustable between 0s and 255s in steps of 1s.
Current Foldback Level Adjustable between 25% and 100% in steps of 1%.
Motor Cooling Time Adjustable between 0s and 3825s in steps of 15s.
This is useful for protecting motors against potential damage when the machine is being used on a long gradient.
Example:
Current Limit Max.= 60A, Threshold = 40A, Time = 30s, Level = 50% and Motor Cooling = 150s.
If the motor current is greater than 40A for 30s, then the i-Drive’s maximum output current will be reduced to 50% of
60A = 30A. The maximum possible output current will then be 30A for the next 150s. After that time, full current
capability will be restored.
SK76977-07 76
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