User Manual of EM760 High-Performance Inverter 7.2 Synchronous motor control 7.2.1 Synchronous motor SVC control (non-standard) Please contact your distributor to customize anon-standard inverter if synchronous motor SVC functions are to be used. Commissioning steps of synchronous motor SVC: (1) Check motor nameplate, and set the type and rated power/voltage/current/frequency/speed of the motor as noted on the nameplate. If the nameplate has indicated the counter- electromotive force, you need to input it into F01.22. If it’s not indicated, no input is required.
(2) Carryout static self-learning ofparameters for the motor, and then check if stator resistance (F01.19), d-axis inductance (F01.20) and q-axis inductance (F01.21) have been learned. (3) Rotary self-learning. If the motor nameplate has indicated accurately the counter- electromotive force, this is skipped. Otherwise, you can either perform rotary self-learning or skip it. However, self-learning allows you to get the counter-electromotive force more accurately. (4) Perform no-load running. If the motor is started smoothly without any reversing when Run is pressed, and stops smoothly when Stop is pressed, no-load start-up and stop works properly. (5) Perform running with loads.
Upon setting function-related parameters, do joint commissioning with loads. (6) If a large and short “Ding” sound occurs at the instant of start-up, reduce F06.61 appropriately, and then decrease F06.58 and F06.61 proportionally. (7) If low-frequency current is excessive during no-load commissioning, reduce F06.29. (8) If no-load currents of no-load high frequency of 30 Hz and above are excessive, reduce F06.33. However, over-reduction is not recommended, for it might lead to an increase in no-load noise. 211 Function code Function codename Parameter description Unit Default setting Attribute F06.21 Flux weakening control options Asynchronous motor Ones place:
Asynchronous flux weakening mode 0: Invalid Non-zero: PI adjustment output Tens place: Output voltage limiting method of asynchronous motor in the flux weakening mode 0: F06.22 output voltage limiting according to bus voltage 1: F06.22 output voltage limiting according to rated voltage 12 O