NORD drives pass se­ries of tests ac­cord­ing to EN 50598-2

DEMM Engineering & Manufacturing - - MOTORS & DRIVES -

In the most re­cent Ecode­sign stan­dard EN 50598-2, the Euro­pean Union is es­tab­lish­ing ef­fi­ciency re­quire­ments for drive elec­tron­ics as well as com­plete drive sys­tems. Ahead of any reg­u­la­tions be­com­ing ef­fec­tive, NORD Drivesys­tems is al­ready per­form­ing tests and nu­mer­i­cal analy­ses for com­po­nents and sys­tems man­u­fac­tured in-house and can there­fore quickly pro­vide de­tailed in­for­ma­tion to re­solve any cus­tomer queries con­cern­ing the EN 50598-2 stan­dard. Fu­ture re­quire­ments can be f lex­i­bly ful­filled. The stan­dard de­fines ef­fi­ciency classes for fre­quency in­vert­ers and mo­tor starters: IE0 (high losses), IE1 (ref­er­ence val­ues), and IE2 (losses sig­nif­i­cantly be­low ref­er­ence). Fol­low­ing the same pat­tern, sys­tem ef­fi­ciency is rated IES0, IES1, and IES2. Cur­rent tests with NORD in­vert­ers have shown power losses sig­nif­i­cantly be­low the ref­er­ence val­ues in the EN 50598-2 stan­dard both for the in­vert­ers them­selves and for power drive sys­tems (PDS) com­bin­ing in­vert­ers and en­er­gy­ef­fi­cient mo­tors. Con­se­quen­tially, NORD is al­ways able to achieve an IES2 sys­tem ef­fi­ciency rat­ing.

NORD has al­ways taken a com­pre­hen­sive ap­proach that con­sid­ers the en­tire drive train. All com­po­nents – gear­boxes, mo­tors, power elec­tron­ics, and func­tional in­tel­li­gence are in-house de­vel­op­ments man­u­fac­tured in NORD fac­to­ries, which makes the com­pany a sin­gle-source provider of com­plete drive so­lu­tions for over 100 in­dus­tries. The 50-year-old com­pany has gath­ered ex­ten­sive ap­pli­ca­tion know-how and a de­tailed un­der­stand­ing of the in­ter­ac­tion of all drive com­po­nents. Sys­tem ef­fi­ciency ac­cord­ing to EN 50598-2 is not only rated at full power but at eight des­ig­nated load points with dif­fer­ent torques and speeds. Break­ing with a long-es­tab­lished con­cept, the stan­dard does not con­sider en­ergy ef­fi­ciency per­centiles, but in­cre­men­tal power loss in Watts. One con­se­quence of this new ap­proach is that sys­tem per­for­mance in drive sce­nar­ios with the mo­tor at stand­still and un­der load (e.g. el­e­va­tor stop) can now also be com­pared. en­quiry #150520.

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