Menu
Siemens 6SN1123-1AA00-0DA2 Configuration Manual
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
805.018.12 Induction motor operation8-303© Siemens AG 2012 All Rights ReservedSIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition8.12 Induction motor operation8.12.1 Operating several induction motors in parallelSeveral motors can also be operated in parallel on a power module, for eachaxis. When selecting the motor and drive module, several engineering guide-lines must be observed.When expanded to the maximum, a drive configuration for parallel operationcan comprise up to eight motors. Motors connected to a drive module in parallelmust have the same V/f characteristics. Further, we recommend that the motorshave the same number of poles. If more than two motors are connected to adrive module, then these should essentially have the same power ratings.For a 2–motor configuration, the difference between the power ratings of themotors should not exceed a ratio of 1:10.The following engineering guidelines must be carefully observed: Selecting the size of the drive module– Steady–state operation of the motors connected in parallel – namely inthe closed–loop controlled range (> nmin1) ) and preferably in the ratedspeed range:Σ rated motor currents rated current of the drive module– Operation of motors connected in parallel with dynamic load (where theload condition changes quickly) and in the open–loop controlled rangerequire an additional dimensioning:1.2 (Σ rated motor currents) rated current of the drive module– The current limit of the drive module must be increased to 150% of therated current when commissioning the system. The motors should not be subject to torques that exceed their rated torque. For special high–speed induction motors, e.g. for woodworking, a seriesreactor must always be located between the drive module and the motorgroup:Rated reactor current: rms current of the motor group2)When the above information and instructions are taken into consideration, theindividual motors are able to correct even for dynamic load and speed steps.”Stable” operation without stalling – also for individual motors – is achievedwhen following the dimensioning guidelines specified above. The speeds of theindividual motors depend on the load. The currently set speeds can drift apartby several percent due to the closed–loop group slip control.1) Standard motor: 2-pin > 600 RPM4-pin > 300 RPM6-pin > 200 RPM8-pin > 150 RPMSpecial motors: nmin > 40 V • nrated >Urated motor600 RPMNo. of pole pairs2) Σ Rated motor currents, or when taking into account the load duty cycles, the total rms current of the motor group.8 Important Circuit Information10.0402.07 |
Product
Learn More
Legal
Copyright © 2024 OneStart. All Rights Reserved