VI-BAMD VICOR Corporation, VI-BAMD Datasheet

VI-BAMD

Manufacturer Part Number

VI-BAMD

Description

Harmonic Attenuator Modules

Manufacturer

VICOR Corporation

Datasheet

1.VI-BAMD.pdf (6 pages)

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VI-HAM

Harmonic Attenuator

Modules

Figure 1b.

Features

Figure 1a.

Above: Oscilloscope photos showing input

voltage and current without power factor

correction (A) and with power factor correction

as provided by the VI-HAM (B).

Unity Power Factor

Safety Agency Approvals:

UL, CSA, TÜV, BABT

Meets IEC 6100-3-2 for Line

Current Harmonic Content

Reduces Peak and RMS Line

Currents

Universal Input: 85-264Vac:

50/60 Hz

Up to 600W of Power

Power Density Up to100W/in

Adaptive Output Voltage Control

Short-Circuit Protection

Input Surge Current Limiting

Converter Enable

Power OK Output

Size: 4.6" x 2.4" x 0.5"

(116,8mm x 61,0mm x 12,7mm)

Efficiency: 90-94% Typical

CE Marked

1-800-735-6200

Unity Power Factor

Conventional capacitive-input front ends draw

energy from the AC line in short bursts of current

at the peaks of the line voltage waveform. These

current bursts are characterized by high peak currents

and high harmonic content. The effect of the

distorted line current can be appreciated by

measuring the rms line current drawn by a

conventional front end: the product of the

measured rms current and the rms line voltage —

the "apparent power" being delivered by the line

— will be significantly greater (typically 1.6X)

than the DC power delivered by the front end.

The "extra" rms current at the input is circulating

harmonic currents which deliver no power to the

load but which flow in the delivery system and

contribute to losses. Only the fundamental

component of the line current contributes to "real"

power flow. Power factor — the ratio of "real" to

"apparent" power — is a measure of the

effectiveness with which an AC load can extract

usable power from an AC source.

The VI-HAM (see Fig. 2) consists of a

full-wave rectifier, a proprietary high-frequency zero-

current switching (ZCS) boost regulator (patents

applied for), active inrush, short-circuit protection,

control and housekeeping circuitry. The incoming

AC line is rectified and fed to the ZCS boost

converter. The control circuitry varies the operating

frequency of the ZCS boost converter so as to

simultaneously maintain the output voltage of the

HAM at a DC voltage value above the peak of the

incoming line, while forcing the input current to

the ZCS converter to follow the waveshape of the

rectified line. By this means, the AC input current

follows the AC voltage waveform and a power

factor better than 0.99 is achieved. Operating

efficiency of the ZCS boost converter is optimized

at any incoming line voltage by a patented

adaptive output voltage control scheme.

Gate Out

NOTE: No input to output isolation.

Gate In

Line

Waveform

Voltage

Recti-

fier

Figure 2 • VI-HAM Block Diagram

Converter

& House-

Circuitry

keeping

Control

Current

Sense

Boost

ZCS

Aux. Supply

The HAM also includes active circuitry which

controls inrush currents when power is applied and

active short circuit protection circuitry — features

not normally found in conventional power factor

correctors.

Housekeeping circuitry provides two signals of use

to the system designer (see Fig. 2): Module Enable

and Power OK. Referencing the timing diagram

(see Fig. 3), the Module Enable signal, which is

connected to the Gate In inputs of the Vicor DC-

DC converters powered by the HAM, will come

high and enable the DC-DC converters when the

HAM output voltage exceeds 240Vdc. The

DC-DC converter voltage outputs will be up

approximately 10 ms after Module Enable goes

high. Typically, 20 ms after Module Enable goes

high the HAM Power OK signal, which can be

used by the system designer to enable circuitry

low. On loss of power or brownout, the Power OK

signal will go high when the HAM DC output

voltage drops below 230V, signaling an impending

loss of input power to the converter modules.

When the DC output dips below 195V, the Module

Enable signal will toggle low, disabling the

converter modules and unloading the HAM.

The HAM will provide at least 16 ms of

ride-through or holdup time, and at least 5 ms of

AC fail warning time with a 1000 µF output

capacitor.

High Frequency

Control

Output Voltage

Module Enable

Protection

Power OK

& Short

Circuit

Inrush

Out

Note:

Non-Isolate

Output

–

Related parts for VI-BAMD

VI-BAMD Summary of contents

Page 1

... Fig. 2): Module Enable and Power OK. Referencing the timing diagram (see Fig. 3), the Module Enable signal, which is connected to the Gate In inputs of the Vicor DC- DC converters powered by the HAM, will come high and enable the DC-DC converters when the HAM output voltage exceeds 240Vdc. The ...

Page 2

... Lower capacitance values may degrade power factor specifications. • Auxiliary Supply (A/S): The VI-HAM and VI-BAMD contain an internal low voltage output (A/S) that may be used to power primary side logic. This output is 19-23Vdc, referenced to -OUT max. Do not overload or short this output as the HAM will fail ...

Page 3

... Driver HAM: Fully configured power factor correcting front end. VI-HAMD-CM Driver HAM: No internal bridge rectifier or synchronization diodes. VI-BAMD-CM Booster HAM: Companion module to VI-HAMD-CM used for additional output power. No internal bridge rectifier. Use the VI-HAM-CM for applications requiring up to 600W from the front end. ...

Page 4

... Specifications VI-HAM and VI-HAMD With External Bridge and Synchronization Diodes, 1000 µF Output Capacitor and Vicor Line Filter P/N 07818. VI-BAMD When Operated with VI-HAM and VI-HAMD, Respectively. (Unless otherwise indicated, specifications apply over operating input voltage and temperature range) Parameter ...

Page 5

... F HUB470-P 870 F HUB870-P 1100 F HUB1100-P Connection Diagram, VI-HAMD/VI-BAMD Input 20A L1 L1 MOV Line Filter GND P/N 03040 12.6A* L2/N L2/N * Please consult Vicor's Application Engineering Department for specific VI-HAMD/VI-BAMD filtering information. VI-HAM / HAMD / BAMD Mechanical Diagram 4.60 (116,8) .50 3.60 (91,4) (12,7) 1.80 (45,7) .30 (7,6) .015 (0,38 2.10 VI-HAM ...

Page 6

... FREQUENCY (MEGAHERTZ) ø.080 PIN 6 PLACES FACE MAY BE BOWED .04 MAX 1.800 .900 .30 .02 .13 .02 .500 2.800 ' HAM Filter P/N 07818 100 . SEE .060 NOTE 1 VICOR LABEL SEE NOTE 2 1.00 MAX ...

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