VI-HAMD-EM HAM - AC HARMONIC ATTENUATOR AC/DC Power Modules

Description

The Harmonic Attenuator Module (HAM) accepts an input of 85 – 264VAC. It provides a DC output compatible with Vicor’s VI-26x, VI-J6x and user-defined Maxi, Mini and Micro DC-DC converters. The combination of a HAM, one or more Vicor DC-DC converters, and the 30205 line filter, listed on Page 8, offers a high density power solution meeting EN61000-3-2.

Features

• Unity power factor

• Safety agency approvals: CE marked, cTÜVus, cURus

• Meets IEC 6100-3-2 for line Current harmonic content

• Reduces peak and RMS line currents

• Universal input: 85 – 264VAC: 50/60Hz

• Up to 600W of power

• Power density up to 100W/in3

• Adaptive output voltage control

• Short-circuit protection

• Input surge current limiting

• Converter enable

• Power OK output

• Efficiency: 90-94% typical

• RoHS compliant

Technical Description

The HAM Figure 1, consists of a full-wave rectifier, a high-frequency zero-current switching (ZCS) boost converter, active inrush current limiting, short-circuit protection, control and housekeeping circuitry. The incoming AC line is rectified and fed to the boost converter. The control circuitry varies the operating frequency of the boost converter to maintain the output voltage of the HAM above the peak of the incoming line, while forcing the input current to follow the waveshape and phase of the line voltage. The AC input current follows the voltage waveform and a power factor better than 0.99 is achieved. Operating efficiency of the boost converter is optimized at any incoming line voltage by an adaptive output voltage control scheme.