Question:
What is the function of the inverter error compensation?
Answer:
The motor identification (C0148 = 1) executes a metrological detection of the inverter error that occurs due to the different delays of the power semi conductors and due to the cable and motor capacities on the voltage rise.
The inverter error compensation characteristic is saved in a mode protecting against mains failure after successful motor identification in EEPROM of the frequency inverter. By means of the operating module keypad (E82ZBC) or keypad XT (EMZ9371BC) the inverter error compensation can be transmitted to an identical drive system (same power stage, same motor, same cable lengths and cross sections). If a parameter set is transmitted from one drive system to another, where not all drive components are identical (e. g. only the function block structure is to be transmitted), the motor identification is to be executed to enable further drive.
The inverter error compensation is the most influential when motor cables are very long and input powers are hgih. Motor frame sizes at the same power stage have less influence on the inverter error compensation.
If due to the motor identification (C0148 = 1) an inverter error compensation cannot be detected, the 8200vector/motec frequency inverter will operate with an internally pre-defined characteristic that is dimensioned for medium motor cable lengths (10 ... 20 m) corresponding to the input power.
