Nidec Unidrive M600 Series Design Manual

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Nidec Unidrive M600 Series Design Manual Manual pdf 141 page image

Safetyinformation Introduction ProductInformationSystemdesignMechanicalInstallationElectricalInstallationGettingstarted Optimization Parameters TechnicaldataComponentsizing Diagnostics ULInformationUnidrive M Regen Design Guide 141Issue Number: 4• OR the supply contactor is de-energized:Main supply contactor auxiliary contact connected to controlterminal 25 of Regen drive opens.• OR the Regen drive is disabled:• OR the MCB trips:External softstart resistor.Then:• the Regen drive will inhibit.• the motoring drive will be disabled by the Regen drive.• the Regen drive main contactor will be opened.7.2.1 SequenceThe motoring drive must only be enabled when the Regen drive isenabled, healthy, and synchronized to the AC supply. This will preventany damage to the Regen drive start-up circuit and prevent OV trips.7.3 Regen drive commissioning / start-up• Ensure power and control connections are made as specified in thisDesign Guide.• Ensure the Regen and motoring drives are not enabled.• Switch on the AC supply.• Both the Regen and motoring drives should now power up throughthe relevant start-up circuits in standard open loop mode.• On the Regen drive, configure the drive type Pr 11.031 (Pr 00.048)to Regen.• The main contactors should now close; the relevant start-up circuit isdisabled at this point.• On the Regen drive, set up the switching frequency and DC bus setpoint voltage to the required values in either Menu 0 or Menu 3, referto section 7.1.2 DC bus voltage set point. If the Regen inductorthermistor has been connected to analog input 3, Pr 07.015 must bechanged to Therm Short Cct or Thermistor mode to enableprotection against inductor overheating. Save the parameters.• The Regen drive can now be enabled, the Regen drive shoulddisplay Active.• The commissioning / start-up of the motoring drive(s) can now becarried out.7.4 Motoring drive commissioning7.4.1 Motoring drive enableWhen the Regen drive has been successfully synchronized, Pr 03.009on the Regen drive will become active and digital I/O 1 on terminal 24also becomes active allowing the motoring drive(s) to be enabled. If theRegen drive trips or attempts to re-synchronize to the supply, Pr 03.009becomes zero and the enable signal for the motoring drive(s) isremoved.The setting of certain parameters in the motoring drive must be givenspecial consideration when used in a Regen system.7.4.2 Ramp Mode - Pr 02.004 (Pr 00.015)When a motoring drive is used in a Regen system, the ramp modeshould be set to Fast. The default setting of standard control will result inincorrect operation.7.4.3 Open-loop Control Mode - Open loop onlyPr 05.014 (Pr 00.007)The default setting of UR I does not function correctly in the motoringdrive when used in a Regen system. When the system is powered up,the motoring drive is disabled while the Regen drive synchronizes to theAC supply. The resultant delay before the motoring drive is enabledmeans that the stator resistance test cannot be completed. When openloop vector operation is required the voltage mode should be set toUR S.7.4.4 AC Supply Loss Mode - Pr 06.003The motoring drive will not operate correctly if the AC supply loss modeis set to Ramp Stop. If the AC supply is lost, the Regen drive disablesthe motoring drive and prevents a controlled stop from being completed.