參數(shù)資料
型號(hào): MC34262
廠商: ON SEMICONDUCTOR
元件分類(lèi): 基準(zhǔn)電壓源/電流源
英文描述: Power Factor Controllers(功率因數(shù)控制器)
中文描述: 功率因數(shù)控制器(功率因數(shù)控制器)
文件頁(yè)數(shù): 14/19頁(yè)
文件大?。?/td> 394K
代理商: MC34262
MC34262, MC33262
http://onsemi.com
14
Figure 23. Power Factor Corrected Input Waveforms
(Figure 20 Circuit)
Figure 24. Output Voltage Startup Overshoot
(Figure 20 Circuit)
Input = 115 VAC, Output = 175 W
Input = 230 VAC, Output = 175 W
2.0 ms/DIV
2.0 ms/DIV
V
C
V
C
Without Overvoltage Comparator
200 ms/DIV
200 ms/DIV
500 V
400 V
0 V
432 V
400 V
0 V
8
8
26%
8%
With Overvoltage Comparator
Figure 25. Power Factor Test SetUp
0.005
1.0
0.005
HARM
FREQ
11
LO
0.1
O
I
T
0 to 270 Vac
Output to Power
Factor
Controller Circuit
Earth
Line
Neutral
115 Vac
Input
RFI Test Filter
Autoformer
2X StepUp
Isolation
Transformer
LO
HI
HI
V
A
Ainst
Acf
Vcf
Arms
Vrms
PF
VA
W
13
9
7
5
3
2
1
0
Voltech
AC POWER ANALYZER
PM 1000
An RFI filter is required for best performance when connecting the preconverter directly to the ac line. The filter attenuates
the level of high frequency switching that appears on the ac line current waveform. Figures 19 and 20 work well with
commercially available two stage filters such as the Delta Electronics 03DPCG5. Shown above is a single stage test filter
that can easily be constructed with four ac line rated capacitors and a commonmode transformer. Coilcraft CMT3282
was used to test Figures 19 and 20. It has a minimum inductance of 28 mH and a maximum current rating of 2.0 A. Coilcraft
CMT4179 was used to test Figure 21. It has a minimum inductance of 17 mH and a maximum current rating of 9.0 A. Circuit
conversion efficiency (%) was calculated without the power loss of the RFI filter.
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