參數(shù)資料
型號: N2086NS090
廠商: WESTCODE SEMICONDUCTORS LTD
元件分類: 晶閘管
英文描述: 4207 A, 900 V, SCR
文件頁數(shù): 8/12頁
文件大小: 264K
代理商: N2086NS090
WESTCODE An IXYS Company
Phase Control Thyristor Types N2086NS060 to N2086NS100
Data Sheet. Types N2086NS060 to N2086NS100 Issue 2.
Page 5 of 11
March, 2004
8.3 D.C. Thermal Impedance Calculation
=
=
n
p
t
p
t
p
e
r
1
τ
Where p = 1 to n, n is the number of terms in the series and:
t = Duration of heating pulse in seconds.
r
t = Thermal resistance at time t.
rp = Amplitude of pth term.
τp = Time Constant of rth term.
The coefficients for this device are shown in the tables below:
D.C. Double Side Cooled
Term
12345
rp
0.01249139
6.316833×10
-3
1.850855×10
-3
1.922045×10
-3
6.135330×10
-4
τp
0.8840810
0.1215195
0.03400152
6.742908×10
-3
1.326292×10
-3
D.C. Single Side Cooled
Term
1234
56
rp
0.02919832
4.863568×10
-3
3.744798×10
-3
6.818034×10
-3
2.183558×10
-3
1.848294×10
-3
τp
6.298105
3.286174
0.5359179
0.1186897
0.02404574
3.379476×10
-3
9.0 Reverse recovery ratings
(i) Qra is based on 50% Irm chord as shown in Fig. 1
Fig. 1
(ii) Qrr is based on a 150
s integration time i.e.
=
s
rr
dt
i
Q
150
0
.
(iii)
2
1
t
Factor
K
=
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