A passive solution to harmonic current compliance
5 June 2002
Power Electronics / Power Management
Vicor's new solution for compliance to EN harmonic current and EMI standards, collectively referred to as 'ENMods', comprises a passive harmonic current attenuation module - the MiniHAM - and an auto ranging AC-DC front-end module - the FARM3 (Filter and Auto Ranging Module). Combined with a few additional filtering and holdup components as specified in the data sheet, the ENMods provide full compliance to:
* EN6100-3-2 Amendment 14 Harmonic Current Content limits.
* EN55022 Level B EMI limits.
* EN6100-4-5 Input Surge Withstand.
Vicor says the MiniHAM is the first passive product specifically designed for EN compliance. Unlike active PFC solutions, the MiniHAM generates no EMI, greatly simplifying and reducing system noise filtering requirements. It is also considerably smaller and more efficient than active alternatives and improves MTBF by an order of magnitude. Uniquely-intended to operate on the DC bus provided by an auto ranging AC front-end, rather than directly on the AC line, it provides harmonic current compliance at up to 600 W of input power.
The 115/230 V a.c. input FARM3 is a new member that has been optimised for use as the AC-DC front-end for the MiniHAM. Both modules are in Vicor's standard Mini half-brick package. Together, they form the basis of a rugged low noise, high efficiency EN compliant power system.
For further information contact Tony Reumermann, ECS, 011 805 4272.
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