Catalogues - avx-high-power-capacitors-for-high-power-electronics

Catalogue AVX High Power Capacitors for High Power Electronics

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AVAX

TRAFIM Products

Standard

LIFETIME EXPECTANCY DESIGN

1.1

> >

1.05

V_w/V_n vs Hot spot temperature

0.95

0.9

0.85

0.8

°e(°q

The highest V_w/V_n ratio (= p_max) for a lifetime of 100,000 hours can be deduced from Curve 1.

Pmax = Vwmax/Vn = 1.040

so V_Wmax = 2080 V (= 1.040 x 2000)

(for 9_HS = 56.8°C and 100,000 hours)

1.6

! >

1.5

1.4

1.3

CURVE 2

V_w/V_n vs Lifetime expectancy

1.2

1.1

Pmax

0.9

0.8

100

1,000

10,000 100,000 1,000,000

Lifetime expectancy (hours)

According to Curve 2, theoretical lifetime expectancy at V_w = 1876 V and 0_HS = 56.8°C can be determined.

This gives a lifetime of 400,000 hours for this capacitor under working conditions. This value is explained by the choice of

Vn >> Vw.