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參數(shù)資料
| 型號(hào)： | 19077 |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO28 |
| 封裝： | SOIC-28 |
| 文件頁數(shù)： | 5/8頁 |
| 文件大?。?/td> | 366K |
| 代理商： | 19077 |
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
PAC, Phased Array Controller
Rev. 1.2
Page 5 of 8
Set your site on VICOR at vicorpower.com
1f
2f
3f
4f
5f
6f
1f
2f
3f4f
5f
6f
8f
9f
10f
11f
12f
13f
14f
15f
16f
17f
18f
60
40
20
60
40
20
magnitude
(dB)
magnitude
(dB)
Frequency Synchronous / Phase Split
with PAC
Frequency / Phase Synchronous
No PAC
7f
communication with both PR and PC pins of each module,
as illustrated in figure 6. A multiplying phase locked loop
captures and locks on the PR signal from the one converter
in the array that operates at the highest frequency to satisfy
control equilibrium. Randomly selected modules of a given
type typically display less than 5% variance in operating
frequencies at any given line / load condition. This is due to
internal component tolerances. Decoding logic sequentially
provides sync pulses to PR pins of all other modules in the
array whose PC pins are high.
The PAC takes full advantage of the ability of Vicor
converters to share the load when the operating frequencies
are synchronous. The PAC however, provides an additional
benefit: phase shifted, frequency synchronous operation.
That is, the sync pulses are sequentially generated with
respect to the controlling converter, and delivered
individually to each converter in the array, so that each
generates a power conversion pulse equidistantly displaced
in time, rather than simultaneously. Figure 7 illustrates a
typical PR pulse sequence for a three module array. The
apparent switching frequency of the array is increased by a
factor of N, where N is the number of converters in the
array. More significantly, the array produces energy
conversion pulses of magnitude E, as opposed to NE, which
is the case when all switching occurs simultaneously.
There exists a linear relationship between the apparent
magnitude of a power conversion pulse produced by the
array, the peak reflected input ripple current and the output
ripple voltage. Performance tests of converter arrays
employing a PAC have demonstrated a substantial reduction
in magnitude of input ripple current, not only of the
fundamental switching frequency component f, but also of
all harmonic components generated by individual
converters in the array. Equiangular phasor rotation from
module to module produces a cancellation effect, as
illustrated in figure 8. The conducted emissions spectrum
produced by an array where the PAC is employed includes
components at Nf and it’s harmonics; each carrying upper
and lower sidebands at f and it’s harmonics. This effect is
illustrated in figure 9 for the case of an eight module array.
The resulting redistribution of energy over a broadened and
upward shifted spectrum substantially reduces the input
filter required to meet conducted EMI standards. This is
evident in the measurement data presented in figure 10,
which illustrates the reflected input current spectrum of an
array comprising eight 300 Vin to 5 Vout, 400 W converters
delivering 500 Amperes. This array employs only a single
260 H, 40 Ampere common mode choke on the input bus,
yet the conducted emissions are under the Class B limit per
FCC part 15 and EN55022, with substantial margin.
Figure 9: Conducted emissions spectrum of an 8-converter array without PAC, with PAC
Figure 8: Vector representation of inter module
phase rotation; 8-module array with PAC
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 190770001 | 制造商:MOLEX 制造商全稱:Molex Electronics Ltd. 功能描述:Avikrimp? Star Ring Tongue Terminal for 18-22 AWG Wire, Stud Size 6 |
| 19077-0001 | 功能描述:端子 STAR RING AVIKRIMP ( VIKRIMP (SRA-829-06) RoHS:否 制造商:AVX 產(chǎn)品:Junction Box - Wire to Wire 系列:9826 線規(guī):26-18 接線柱/接頭大小: 絕緣: 顏色:Red 型式:Female 觸點(diǎn)電鍍:Tin over Nickel 觸點(diǎn)材料:Beryllium Copper, Phosphor Bronze 端接類型:Crimp |
| 190770002 | 制造商:MOLEX 制造商全稱:Molex Electronics Ltd. 功能描述:Avikrimp? Star Ring Tongue Terminal for 18-22 AWG Wire, Stud Size 6, Mylar TapeCarrier |
| 19077-0002 | 功能描述:端子 STAR RING RoHS:否 制造商:AVX 產(chǎn)品:Junction Box - Wire to Wire 系列:9826 線規(guī):26-18 接線柱/接頭大小: 絕緣: 顏色:Red 型式:Female 觸點(diǎn)電鍍:Tin over Nickel 觸點(diǎn)材料:Beryllium Copper, Phosphor Bronze 端接類型:Crimp |
| 190770005 | 制造商:Molex 功能描述:Star Ring Tongue Terminal 18-22AWG 23.62mm 9.78mm Tin Box |
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