400Hz Alternators - bei Elektromotoren.de

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KEMMERICH ELEKTROMOTORENGmbH & Co. KGKemmerich Elektromotoren 400Hz In DepthProven CapabilityHigh levels of performance, with the standardalternators filled with performance enhancingfeatures. Supported through an experienced andcomputer assisted FEM design, professional teamable to evaluate all tenders and ensure exceptionalsupport both pre and post order. Unique specialmachines to suit case specific applicationsare available, with a specific design to assurethe lowest possible losses that is so critical in400Hz machines. We know that iron losses andshaft currents are a thought job at high frequency,and we select the lowest losses electrical steel onthe market.Exceptional ExcitationThe Auxiliary Winding is usedthroughout the range of alternators, and has beena proven standard in all market sectors.It is a brushless excitation system derivingpower from a dedicated auxiliary winding withinthe main stator. This winding is protected by 4layers of polyester in addition to the clear varnishand EG43 severe environment protection used inthe most demanding applications. Fitted withinthe main stator, it minimizes overall dimensionsof the alternator and ensures a compact machine.This system ensures a high level of motor startability, and surpasses the mandatory requirementsgiving >300% forced current (short circuitmaintenance) for 20 seconds – 10 seconds morethan the standards require.S.R.7-H400bThe S.R.7-H400B regulator is an advanced compactelectronic regulator used for400 Hz machines. It is internally designed, as weknow that this is the only viable route to get thebest from our machines.This regulator is equipped with a low speed andoverload protection with an adjustable interventionthreshold, it has adjustable voltage stabilityand it offers the possibility for a remote voltageregulationConstruction‹- Rigid steel frames (FeP12)‹- Rotors are dynamically balanced with ½ key(ISO 8821), conforms to class G.2.5 (ISO 1940)‹- Squirrel damper windings is available uponcustomer request, if the application needs it.Bearings‹- Sealed for life bearings. On customer r equest,we can select insulated bearingRadio Interference SuppressionThe standard generators comply with the specificationVDE 0875, degree N and with the basic safetyrequirements of the European regulation onelectromagnetic compatibility; by applying theEuropean standards EN 60034-1, we comply withthe above-mentioned regulation. Other standardscan be achieved adding filter sets.www.elektromotoren.de2
KEMMERICH ELEKTROMOTORENGmbH & Co. KGKemmerich Elektromotoren 400Hz In DepthInsulation and ImpregnationInsulation materials used provide a system insulatedto Class H level. Superior processes areemployed to add an EG43 compound after insulationover the main and exciter windings to givea very high standard of protection. Higher levelssuch as the black butadiene (rubberized) coatingare also available.ReliabilityStandardized components are used with ‘families’of industrial machines to give very high degreesof interchangeability. Lower component countthroughout the range, and also within individualmachines, has focused efforts to enhance thereliability of the products. In testimony to this, thereliability prediction according to the military standardMIL-HDBK-217F, was a failure rate of 75,82fpmh (failures per million hours), 13,189 hoursmtbf (mean time between failures).Minimum MaintenanceThe design of the 400Hz alternators arebuilt with low maintenance in mind. Bearings haveup to 40,000 hours life expectancy, and windings,including the auxiliary winding, have high degreesof protection. Where maintenance is necessary,access is very simple (ie no PMG (permanentmagnet generator) to remove before replacingand exciter stator. In addition the commonality ofparts improves component availability.AccessoriesA large number of accessories are available onrequest. Including:• Space heaters• Temperature detectors (thermistors or PT100),for windings and bearings• Higher degrees of mechanical protection(IP45 or IP54)• Parallel operation CT’s• Black butadiene winding protectionQuality AssuranceProducts are built in accordance with ISO 9001,accredited by Det Norske Veritas; approvals byCanadian Standards Authority (CSA) and alsoUnderwriters Laboratory (UL) for the insulationsystems.Designs are executed according to the most commonspecifications such as CEI 2-3, IEC 34-1, EN60034-1, VDE 0530, BS 4999-5000, CAN/CSA-C22.2 No.14-95 – No.100-95.Lamination design has been devel oped by finiteelement analysis.Compact DimensionsComparing against the competition, the400Hz alternators are among the most compactand light alternator packages available. Thisincredible fact considers machines are among thehighest efficiency. This highlights the superiorability in the design and productionof their alternators.www.elektromotoren.de3
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400Hz Alternators - bei Elektromotoren.de

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