Please find the presentation from our webinar where you can learn more about the applications where our C44U and C44P-R series can be used. Our engineers speak about the performances of the series

1. © KEMET Electronics. All Rights Reserved.
WEB SEMINAR
C44U DC Link Can Film Capacitor
C44P-R AC Filter Can Film Capacitor
June 17, 2019

2. 2
• C44U : DC Link Can Film Capacitor
Agenda

3. 3
❑C44U series / Film Can DC link Capacitors
❑ - Function Requirements
❑ - Overview on Series: Size / Capacitance / Voltage Tables
❑ - Electrical characteristics
❑ - Hot spot calculation
❑ - Life Expectancy
❑ - Applications
❑ - Cross Reference
Agenda

4. 4
DC Link Capacitor
AC/DC
Converter
DC/AC
Converter
Typical rated voltages for film DC-Link:
• 700 Vdc - welders
• 600 - 1500 Vdc - solar converters
• 1200 Vdc - wind converters
Demanded Life Expectancy: >10 years
Trend to increase life expectancy
To support a DC network by
supplying periodically high currents
Typical IGBT switching frequency, Fswitch : 4 – 30 kHz
Iripple freq ≈ 2 x Fswitch

5. 5
C44U DC Link Capacitor
• Rated C = 90 ÷ 3000µF
• Rated Vdc = 600 ÷ 1800Vdc
• UL 810 certificate - Construction only
• Life expectancy > 100’000 hours
• ESR design optimization
High performances, high quality levels and
competitive cost structure thanks to Vertical
integrated Manufacturing
FOCUS SEGMENTS
• Solar Converters
• Windmills
• Motor Drives
Rated
Voltage
Capacity
Range
Max. Irms
@ Tamb 40°C
600 Vdc 1000 - 3000 μF 65 - 110 Arms
900 Vdc 300 - 2100 μF 60 - 100 Arms
1100 Vdc 300 - 1700 μF 60 - 100 Arms
1300 Vdc 200 - 1100 μF 50 - 100 Arms
1500 Vdc 120 - 700 uF 40 - 100 Arms
1800 Vdc 90 - 550 μF 40 - 90 Arms
Size Table
Dia (mm) Height (mm)
Ø 85 101 116 126 136 146 180 270
Ø 116 136 156 236 276

6. 6
C44U series - Electrical Characteristics
Rated voltage range (@ 70°C) - UNDC 600 – 1800 VDC
Capacitance range 90 – 3000 µF
Capacitance Tolerance ±10% at T = 25°C (±5°C)
Climatic category 40/85/21 IEC 60068-1
Dissipation Factor typical (tgδ0) ≤ 0.0002 at 10 kHz and +25°C (±5°C)
Surge voltage 1.5 * UNDC for maximum 10 times in life time at 25°C
Overvoltage IEC 61071
1.15 * UNDC for maximum 30 minutes - once per day
1.3 * UNDC for maximum 1 minute - once per day
Peak non Repetitive Current 1.5 * IPKR - maximum 1,000 times in life time
Insulation Resistance IR x C ≥ 30.000 seconds at 100 VDC 1 minute (+25°C)
Capacitance deviation in operation
±5% maximum on capacitance value measured at
(+25°C)
Test Voltage between terminations 1.5 * UNDC for 10s or 1.65 * UNDC for 2s @ +25°C.
Permissible Relative Humidity - Storage
Annual average ≤ 70%; 85% on 30 days/year randomly
distributed throughout the year. Dewing not admissible

7. 7
C44U - Life calculation
3. Hot spot calculation
5. Component expected life using datasheet graphs
4. Limit checks
1. Input data: Capacitance, Working Voltage, Irms, Ambient Temp, Expected life
2. Data from catalogue: ESR, Rth according to Capacitance and as a safety choice rated voltage ≥ Working voltage

8. 8
• Life expectancy is function of:
1) Ripple current Irms
2) Ambient temperature Tamb
3) Operating voltage Vop
• Any declaration must consider contemporary all the 3 variables
• The right combination of Irms, Tamb, Vop should be based on:
• ambient temperature
• installation, ventilation
• working voltage
• ripple current spectrum
• duty cycle
Analysis of the application and Lifetime
Calculation

9. 9
C44U series for DC-Link Applications
Hot spot calculation
𝑃 𝐷 = 𝐼𝑟𝑚𝑠2 ∗ 𝐸𝑆𝑅
Δ 𝑇 𝐴𝑚𝑏 − 𝐻𝑆 = 𝑃 𝐷 ∗ 𝑅𝑡ℎ
𝑇 𝐻𝑆 = T 𝑎𝑚𝑏 + 𝑅𝑡ℎ * (𝐼𝑟𝑚𝑠2
∗ 𝐸𝑆𝑅)
In DC-Link capacitors the ESR is constant in the range 2KHz – 50KHz, so
we can simply consider the total Irms instead of the harmonic composition
in order to calculate the Power Dissipation.
• Rth = Thermal resistance
• PD = Power dissipated
• ESR = Equivalent Series Resistance @ 10KHz
Input data: Irms, T 𝑎𝑚𝑏
Catalogue data: 𝑅𝑡ℎ , 𝐸𝑆𝑅
Output data: 𝑇 𝐻𝑆
𝑇 𝐻𝑆 = T 𝑎𝑚𝑏 + Δ 𝑇 𝐴𝑚𝑏 − 𝐻𝑆
The hot spot is the internal point of the capacitor where the temperature reaches maximum value.
Rth and ESR are listed in the catalogue as a function of cap and Rated Voltage
Typical trend

10. 10
Life Calculation Example for DC Link
• The DC link capacitor in a converter shall provide an Irms current of 60A at 990V / 10kHz. Capacitance of
around 500uF and temperature around 55°C - Life time 100 khrs.
1) Calculation of the ripple voltage: Urms = 60A / (2π * 10000 Hz * 500 μF) = 1.9 V
2) Calculation of Undc: Undc = 990 + (1.9 * √2) = 992.7 V
3) For DC application our range C44U is the best choice and we choose the C44U 1100V
4) Irms application = 60A < 90A → OK
5) ESR = 1.1 mOhm, Rth = 3.4 °C/W
6) P = ESR * Irms ^ 2 = 1.1 mOhm * 60 ^ 2 = 4.0 W
7) Ths = Tamb + (Rth * P) = 55 + (3.4 * 4.0) = 68.6 °C
8) 68.6°C < 70°C max reference temperature → OK

11. 11
Life Calculation Example for DC Link
9) Life Expectancy from Life
Time Curve:
Voltage ratio 992.7 / 1100 = 0.9
at Ths ≈ 70 °C
Result of around
130 khrs → OK

12. 12
Life Calculation Example for DC Link
10) FIT value from FIT curve:
Voltage ratio 992.7 / 1100 = 0.9
at Ths ≈ 70 °C
Result of around
30 FIT→ OK

13. 13
DC Link Film Capacitors Applications
DC/AC
Inverter
mains
1 DC Link AC Harmonic Filter2
• DC Link : C44U
(600 – 1800 Vdc)
• AC Harm Filter : C44P-R
(330Vrms – 1000Vrms)
1 2
AC/DC
Converter
2
mains

14. 14
C44U series Cross Reference
Function Series TDK/EPCOS
Electronic
Concepts
Electronicon AVX
DC-Link C44U B2562x UP3 E50 (PK16) FFLI

15. 15
C44U series for DC Link
Questions ?

16. 16
• C44P-R : Power Can for AC Filtering
Agenda

17. 17
❑C44P-R series / Power Can for AC Filtering
❑ - Function Requirements
❑ - Overview on Series: Size / Capacitance / Voltage Tables
❑ - Electrical characteristics
❑ - Hot spot calculation
❑ - Life Expectancy
❑ - Applications
❑ - Cross Reference
Agenda

18. 18
AC Filter
To reduce the harmonic components
overlapped to the fundamental
frequency
AC Harmonic Filter
Typical rated voltages:
• 250 -350 Vac - Output / Star Connection
• 400 Vac - 500Vac - Output / Delta Connection
• 690Vac - Solar
• > 690 Vac - Wind Generators
Demanded Life Expectancy: > 10 years

19. 19
C44P-R AC Filter
• FPU safety overpressure device
• UL 810 certification
• Ambient temperature up to + 70°C
• Exp. life 100.000hours @ Ths = 75°C
• Upon request voltage > 1000Vrms
FOCUS SEGMENTS
• Solar Converters
• UPS
• Windmills
Rated
Voltage
Capacity
Range
Max. Irms
330 Vrms 100 ÷ 600 μF 25 -75 Arms
440 Vrms 100 ÷ 400 μF 30 - 60 Arms
480 Vrms 60 ÷ 250 μF 30 - 50 Arms
550 Vrms 22 ÷ 150 μF 40 - 60 Arms
640 Vrms 15 ÷ 150 μF 35 - 60 Arms
780 Vrms 10 ÷ 100 μF 30 - 60 Arms
1000 Vrms 15 ÷ 68 μF 33- 55 Arms
Dia
(mm)
Ø 65 Ø 75 Ø 85 Ø 95 Ø 116
H
(mm)
117 117 147 247 247
147 147 197
197 197 247
247 247 280
Size Table
High performances, high quality levels and
competitive cost structure thanks to Vertical
integrated Manufacturing

20. 20
C44P-R Technical Information
General Technical Data
Electrical Characteristics

21. 21
C44P-R AC Filter: Safety Device activation
The expansion of the internal oil causes the elongation
of the can and the disconnection of the wire.
The oil expansion limit the maximum hotspot at 80°C
NOTICE: Care should be taken to ensure that there
still is electrical clearance of 15 mm between
terminations and other live or earthed parts above the
capacitor, in case of safety device activation

22. 22
C44P-R - Life calculation
1. Data from the application: Operating Voltage, Ripple Current/Frequency, Ambient Temp, Expected life
2. Data from catalogue: Capacitance, Rs, Rth, Rated Voltage and tgδ0
3. Hot spot calculation
5. Component expected life using datasheet graphs
4. Limit checks

23. 23
C44P-R - Life calculation
The hot spot is the internal point of the capacitor where the temperature reaches maximum value.
Rth and Rs are listed in the catalogue for each P/N. tgδ0 = 2*10-4 (typical value)
Where:
• Rth = thermal resistance
• Rs = series resistance; considered a constant value
• PT = total power losses
• PD = dielectric power losses
• PJ = Joule power losses

24. 24
C44P-R - Life calculation

25. 25
C44P-R - Limit checks
1 Max ripple voltage check
2 Max ripple current check
3 Max hot spot temperature check

26. 26
Life calculation example:
Hotspot = 75°C
Working voltage = 440 Vac
Rated Voltage = 440 Vac
Lifetime expectancy request > 80000 hours
Step 3) Output life expectancy > 80 Kh
Step 2) Select 75°C Hotspot curves
C44P-R - Lifetime calculation graphs
Step 1) Calculate Voltage Ratio
V/VACMAX = 1

27. 27
AC Filtering Power Film Capacitors
Applications
DC/AC
Inverter
mains
1 DC Link AC Harmonic Filter2
• DC Link :C44U-M
(600 – 1800 Vdc)
• AC Harm Filter :C44P-R
(330Vrms – 1000Vrms)
1 2
AC/DC
Converter
2
mains

28. 28
C44P-R series Cross Reference
Function Series TDK/EPCOS Electronicon AVX
AC-Filter C44P-R B3236x E62 FLA

29. 29
C44P-R series for AC Filtering
Questions ?

30. 30
Thank You
Rahul Sharma
Product Manager– Central Europe
Film Capacitors Business Group
Ph: +49 (089) 858403712
Email: rahulsharma@kemet.com