Film Capacitors – Power Electronic Capacitors

B2562*

MKP DC

FILM R&D / FILM P PM

January 2013 – Version 8

Please read Cautions and warnings and

Page 7 of 20

Important notes at the end of this document.

Maximum operating temperature

Highest permitted capacitor temperature during operation, i.e. temperature at the hottest point of the case.

Hot-spot temperature

Temperature zone inside of the capacitor at hottest spot.

Tangent of the loss angle of a capacitor tan

δ

Ratio between the equivalent series resistance and the capacitive reactance of a capacitor at a specified

sinusoidal alternating voltage, frequency and temperature.

The sum of all Ohmic resistances occurring inside the capacitor.

ESR

ESR (Equivalent Series Resistance) representing entire active power in capacitor.

ESR =

C

⋅

ω

δ

tan

=

C

R

s

⋅

+

ω

δ

0

tan

The thermal resistance indicates by how many degrees the capacitor temperature at the hot spot rises in relation

to the dissipation losses.

Maximum permissible power dissipation for the capacitor’s operation.

th

A

hs

R

Θ

−

Θ

The sum of all inductive elements which are contained in a capacitor.

The lowest frequency at which the impedance of the capacitor becomes minimum.

R

self

C

L

2

1

⋅

⋅

π