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Transcript of Page 1 WIMA DC-LINK Capacitors. Page 2 Outline DC-Link Capacitors: Introduction Capacitor...
Page 1 www.wima.com
WIMA DC-LINK Capacitors
Page 2 www.wima.com
Outline
DC-Link Capacitors: Introduction
Capacitor Technologies
Characteristics
WIMA DC-LINK Range
Applications
Conclusion
Page 3 www.wima.com
WIMA DC-LINK capacitors are…
… designed for applications in high power converter technology
… substituting more and more electrolytic capacitors
… manufactured with low loss Polypropylene dielectric
… showing high current capability and low dissipation/self-heating
… available in rectangular and cylindrical cases with capacitances
up to 8 250 µF
… available in various customized versions
Basic Description
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Technical characteristics
Technology Capacitance per Volume
ESR Irms Stability / Reliability
Plastic Film Improving Low High High
Electrolytic High High Medium Medium
Capacitance drift with temperature
Plastic Film Electrolytic
115%
75%
85%
95%
105%
-60 65-35 -10 15 40 90
Comparison of DC-Link Capacitor Technologies: Film Cap vs. Electrolytics
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Very high volume / capacitance ratio
High voltage rating per component
Very low dissipation factor (ESR)
Very high insulation resistance
Excellent self-healing properties
Long life expectancy
Non-polar construction
Particularly reliable contact configuration
High shock and vibration resistance
Outstanding mechanical stability
Solvent-resistant, flame retardant plastic case (in accordance with UL 94 V-0)
WIMA DC-Link Characteristics
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Technical SolutionsBasic Criteria
Metallized plastic film Metallized plastic film
Plastic case (UL 94 V-0) Terminal robustness (according to capacitor size)
Plastic case (UL 94 V-0) Terminal robustness (according to capacitor size)
High self-healing capability Thermal / electrical stability Reliability
High self-healing capability Thermal / electrical stability Reliability
High ripple current capability Low ESR & ESL
High ripple current capability Low ESR & ESL
High resistance to mechanical stress High resistance to mechanical stress
Wound film technology PP film material Variable terminal configurations
Wound film technology PP film material Variable terminal configurations
Requirements and Technical Solutions
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Self-healing Characteristics of Metallized Film
Schematic depiction of the self-healing process
Isolated area after the self-healing process
During operation voltage spikes and/or high temperature may impact the capacitor
An electrical breakdown occurs causing temperatures of several thousand °C
The metallization evaporates in the area of the break-down channel
A metal-free zone is created isolating the area electrically.
The capacitor has regenerated (self-healed) completely.
b = breakdown channelc = current flowd = de-metallized area
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DC-Link Termination Options:
Cylindrical plastic case with screw fixing and male or female connections DC-LINK MKP 3
2-pin and 4-pin versions (screwable plate versions on request) DC-LINK MKP 4 / DC-LINK MKP 4S
Cylindrical capacitor body with pin connections for PCB mounting DC-LINK MKP 5
Cylindrical capacitor body with male or female connections for bus bar mounting DC-LINK MKP 6
Versatile and safe contact configurations by screwable plates DC-LINK HC / DC-LINK HY
Terminal Configurations
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DC-LINK MKP 4 / DC-LINK MKP 4S:
2-pin or 4-pin version (screwable metal plate versions on request)
Capacitors are non- polarized
Terminal Configurations
W PCM b d c
111315172017192024273135403545
27.527.527.527.527.537.537.537.537.537.537.537.537.552.552.5
57.57.510
12.51010
12.512.5202020202020
0.80.80.80.80.811111111
1.21.2
0.40.40.40.40.40.40.40.40.40.40.40.40.40.80.8
PCM d
27.537.5
0.81
DC-LINK MKP 3:
Cylindrical capacitor body with screw fixingfor PCB mounting
Capacitors are non-polarized and aredesigned with maleor female screw connection.
D L
84.584.5
5164
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DC-LINK MKP 5:
Cylindrical capacitor body with pin connections for PCB mounting
Capacitors are non-polarized.
The centre termination is designed as one pole whereas the four outer terminations form the other pole.
Terminal Configurations
D L
505050
5795
120
DC-LINK MKP 6:
Cylindrical capacitor body with screw connec-tions for bus bar mounting
Capacitors are non-polarized and are designed with male
or female screw connection.
D L a b c
8585858585858585116116116116116
60768595
11012013214095
110120132140
32323232323232325050505050
12121212121212121414141414
6666666655555
D L a b c
858585858585858585
116116116116116116116116116
110140155185210235252260345110140158185215230255295342
323232323232323232505050505050505050
121212121212121212141414141414141414
666666666555555555
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Terminal Configurations
DC-LINK HY:
Rectangular capacitor body with screw fixingand screwable plate connections
Customized capacitors with variable contact configurations on request.
W H L a b c d
84107130
6691114
179179179
828282
132132132
255073
7.57.57.5
84107130
6691114
291291291
135.5135.5135.5
239239239
255073
101010
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Speed Adjustment and Control of Three-Phase AC Motors
Frequency Converters are designed for starting, braking, speed adjustment as well as control or positioning of three-phase AC motors.
Fields of application: Trains, Freight Elevators, Wind Power Plants
Mains Mains Filter Mains Rectifier Voltage Motor Inverter Motor Intermediate
Circuit
Application: Frequency Converter
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Layout of a DC distribution network for offshore windparks
DC/DC converter
Application: DC/DC Converters
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DC capacitor as intermediate circuit buffer
Mains Rectifier Buffer Motor Inverter
Mains Motor
Requirements for DC-LINK
- For plastic film capacitors highest volume/capacitance ratio combined with high DC voltage strength by self-healing capability
- Intermediate circuit voltage =/> 450 V
- High ripple current capability and resistance against superimposed AC- and pulse voltage respectively
Typical Converter Circuit using a DC-Link Capacitor
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Customized Solutions
2 x 1500 µF800 VDC
1100 µF600 VDC
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Customized Solutions
500 µF450 VDC
350 µF800 VDC
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Operational Data Required:
Electrical data of the capacitor - Capacitance - Rated voltage (DC / AC) - Tolerance* - Dimensions* / PCM*
Electrical data of the application - Voltage - Current - Pulse frequency / Repetition frequency - Time axis - Pulse rise time*
Application data - Ambient temperature - Kind of application*
Oscillogram (voltage and current) appreciated *optional
Selection of Capacitors for Customized Applications
Page 29 www.wima.com
WIMA film capacitor technology isreplacing more and more electrolytic capacitors in DC-Link applications
made possible due to:
Longer life time and growing efficiency requirements in applications
Parameter stability that makes the design easier
New film cap designs with greater density of capacitance per volume (reducing the size)
For more information: www.wima.com
Conclusion
Page 30 www.wima.com
Competitors
Kemet Vishay TDK/Epcos AVX Electronicon Faratronic
Product Family Range Description Picture
DC-LINK MKP 3 35 µF – 200 µF700 VDC to 1500 VDC
C4DE B2563… FFVE/FFVI(FFVS)
E53 C3AC3A(G)
DC-LINK MKP 4DC-LINK MKP 4S
2 µF – 150 µF450 VDC to 1300 VDC
C4AE MKP1848MKP1848CMKP1848S
B32674…678B32774…778
FBFE
C3D
DC-LINK MKP 5 16 µF – 260 µF500 VDC to 1300 VDC
E61
DC-LINK MKP 6 75 µF – 4920 µF600 VDC to 1500 VDC
C44U ESTA: HDMKP B2562… FFLI PK16 XC (E50) C3B
DC-LINK HC 140 µF – 8250 µF450 VDC to 1500 VDC
Customized solutions on request
PCC LP: B25655…
FFLC C36
DC-LINK HY 500 µF450 VDC
B25655 C3NC36
Cross-Reference List
Page 31 www.wima.com
WIMA Spezialvertrieb elektronischer Bauelemente GmbH & Co.KG
Besselstr. 2-4D-682199 MannheimGermany
Phone: +49-621-86295-0Fax: +49-621-86295-95Email: [email protected]: www.wima.com
Thank You !