Life is how to calculate, capacitors can use how long

Life estimation ( 预期寿命) : electrolytic capacitor under the highest working temperature, time of sustainable action.

Lx=Lo*2( - Ta) 10 < br / >

Lx = actual working life

Lo = guarantee life

To (= maximum operating temperature 85℃or105℃)

the practical work of Ta = capacitor surrounding temperature

for example: 105 ℃ / 1000 HRS specification values

65 ℃ life estimate: Lx = 1000 * 2 ( 105 - 65). 10 < br / >

the actual working life: 16000 HRS

high temperature load life ( LoadLife) The electrolytic capacitor under the highest working temperature, the Inca rated voltage, by a continuous regulation do

time, must comply with the following changes: & Delta; Cap: before the test within the 20% of the value of the

tanδ Characteristics: the initial specification values less than 200% of the

LC: the early features below the specification values

high temperature place (life 货架寿命) : the electrolytic capacitor under the highest working temperature, the time after the completion of the continuous provision shall conform to the

change: & Delta; Cap: before the test value of less than 20% tanδ Characteristics: the initial specification values less than 200% of the

LC: the early features below the specification values

hot charging and discharging test ( 电荷/ DischargeTest) The electrolytic capacitor under the highest working temperature, the Inca rated voltage,

330 seconds after charging for 30 seconds and then discharge for a cycle, so after 1000 cycles, shall comply with the following changes: & Delta; Cap: before the test of the value of the

10%

tanδ Characteristics: the initial specification values less than 175% of the

LC: the early features below the specification values

ripple load test ( RippleLife) The electrolytic capacitor under the highest working temperature, the Inca dc voltage and maximum ripple current ( Direct current (dc)

= + maximum ripple voltage peak pressure rated voltage) , after a continuous stipulated finish time, must comply with the following changes: & Delta; Cap: test before the

20% of the value within the

tanδ Characteristics: the initial specification values less than 200% of the

LC: the early features below the specification values

the commonly used formula of electrolytic capacitor

capacitive reactance: XC = 1 / ( 2π fC) 【 Ω 】

impedance: XL = 2 & PI; fL【 Ω 】 :

impedance Z = & radic; ESR2+( XL - XC) 2' Ω 】

ripple current: IR = & radic; ( β △T / ESR) 【 女士】

power: P = I2ESR 【 W】

resonance frequency: fo = 1 / ( 2π √ LC) 【 Hz】

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