Power Ring Film Capacitors
TM
SBE Part 700D117912-408
Power Ring Film Capacitor™
115 µF, 1200 Vdc
The 700D117912-408 Power Ring is a
1200Vdc, 115 µF DC Link Capacitor with
an ESR of 500 micro-Ohms at 20kHz and
an ESL of less than 5nH.
Electrical Specifications
SBE Part #:
700D117912-408
ESL:
Capacitance/Tolerance:
115 µF ±10%
DC Voltage Rating:
1200 Vdc
Less than 5 nH in a suitable
laminar bus structure
Operating Temperature:
-40°C to +85°C at full
DC voltage rating
Voltage, Temperature
De-rate voltage linearly to
De-rating:
800 Vdc from +85°C
to +105°C
Dielectric/Construction:
Metallized polypropylene.
Single section design
Dielectric Withstand:
Units 100% tested at DC
potential of 1500 Volts for two
System Fault Current
4,000 Amps maximum
minutes at 25°C
Rating (external to the
capacitor):
RMS Current Rating:
400
Typical ESR vs. Frequency:
Typical 700D408 ESR vs Frequency
7
6
ESR,
milliohms
4
3
2
1
0
0.01
0.1
Maximum Ripple Current (A rms)
5
300
200
Case Side Cooling Only
Case and Bus Side Cooling
100
700D408 with 20 kHz ripple current
Temperature rise due to capacitor losses only
Bus heat load NOT included
0
Frequency, KHz
1
10
100
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
Case Temperature (
o
C)
SBE reserves the right to amend design data
At the Leading Edge of Film Capacitor Technology®
Power Ring Film Capacitors
SBE Part 700D117912-408
TM
Thermal Specifications
Here are two representations of “Capacitor Surface
Temperature over Time” for two specific Thermal
Resistances of 1°C/W and 0.5°C/W.
Notes regarding these graphs:
Sample 1.
Capacitor surface temperature rise above application
environment @ 71 Amps RMS current load, 10 KHz.
Thermal resistance = 0.5°C/W:
Capacitor Surface Temperature
Cap at Uniform Temperature
Temperature degrees C
• The thermal resistance is that from capacitor to
application. This is a function of the application
environment, not the capacitor itself.
• The capacitor can handle extreme current for small
duty ratios. Trise occurs very slowly. This is because
the capacitor has a high specific heat.
• These charts can be adapted for other currents by
multiplying y axis values for any time by (Iapp/71)²
• Internal capacitor Trise is added to the capacitor
surface/terminal temperature.
•
Terminals are assumed to be at case temperature.
26.4
26.2
26
25.8
25.6
25.4
25.2
25
24.8
0
500
1000
1500
2000
Time in seconds
Sample 2.
Capacitor surface temperature rise above application
environment @ 71 Amps RMS current load, 10 KHz.
Thermal resistance = 1°C/W:
Capacitor Surface Temperature
Cap at Uniform Temperature
28
27.5
Dimensions:
Terminals:
Encapsulation:
Marking:
SBE
700D408
115 µF ±10%
Refer to layout details
Tin plated copper,
0.032” thick
Molded polymer case,
potted with RTV
Temperature degrees C
Mechanical Specifications
27
26.5
26
25.5
25
24.5
0
1000
SBE company identification
SBE “short form” part number
Capacitance value and
tolerance
1200 Vdc
DC voltage rating
yyww-lot#-unit 12-digit serial number (date
code, lot number, unit number)
Time in seconds
2000
3000
4000
SBE reserves the right to amend design data
SBE Inc. 81 Parker Road
Barre, Vermont 05641 USA
telephone:
802.476.4146
fax:
802.661.3950
web site:
www.SBElectronics.com
e-mail:
PowerRing@SBElectronics.com
Power Ring Film Capacitors
Mechanical Mounting and Additional Thermal Notes:
TM
SBE Part 700D117912-408
that the capacitor internal heating is VERY small, and
other bus structure heat sources are very likely signifi-
This capacitor is optimized for extremely low self
cantly higher than the heat added to the bus by the
inductance when connected to a suitable laminar bus
capacitor. Capacitor dissipation is approximately 2.5W
structure. When so connected, the capacitor is very
at 71Arms, from 1-100KHz. It is highly recommended
rigidly attached to such a structure and thus does not
to use infrared thermal imaging from a system cold
necessarily need to be mounted to a chassis. However, start to determine the location and relative magnitude
the capacitor case can be attached to an application
of thermal input to the bus. The capacitor may well
surface/heat sink, etc. if desired. When so mounted,
function as a thermal conduit for bus structure heat,
the capacitor can be part of the bus structure sup-
and it will be very possible that the capacitor internal
port. Use of thermal interface compound between the
hot spot is less than the terminal temperature.
capacitor case and application surface/heat sink will
Thermal contour maps are available for some repre-
assist with removal of capacitor and bus heat. Note
sentative conditions.
Layout Details:
NOTES:
1.
2.
All Hole Positions Inspected
All Dimensions Inspected Unless
Marked As Reference
7X 45.0°
22.5°
4.618
Bolt Circle
A
C
.165 THRU
M5X0.8 - 6H THRU
.020 A B C
Revisions
REV.
01
02
DESCRIPTION
Initial Release
Standardized Layout View
CHG
BY
-
AGH
CHK
BY
-
DMB
APR
BY
-
MSB
DATE
-
12/14/2010
B
6.498
Bolt Circle
6.264
.197±.005 THRU
4X
Accepts 1/4" Plastite Screw
40 in-lbs MAX Torque
.020 A B C
.040
16 Surfaces
.263
2.157
A
7.051
Bolt Circle
.750
.663
.375
.280
NON-TOLERANCED DIMENSIONS ARE BASIC
.010 A B C
UNLESS OTHERWISE SPECIFIED:
ALL DIMENSIONS ARE IN INCHES
SBE, INC.
81 PARKER ROAD
BARRE, VT 05641 USA
802.476.4146 FAX: 802.661.3950
GEOMETRIC TOLERANCING PER: Y14.5-2009
PROPRIETARY AND CONFIDENTIAL
THE INFORMATION CONTAINED IN THIS DRAWING IS THE SOLE PROPERTY OF SBE. ANY
REPRODUCTION IN PART OR AS A WHOLE WITHOUT THE WRITTEN PERMISSION OF SBE IS PROHIBITED.
DETAIL A
SCALE 1 : 1
MATERIAL
DRAWN
CHECKED
ENG APPR.
FINISH
MGS
MGS
MSB
2/13/2010
10/13/2010
10/13/2010
Power Ring Capacitor,
115uF, 1200VDC
DWG. NO.
TITLE
700D408LV
DO NOT SCALE DRAWING
SIZE
A
REV
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SHEET 1 OF 1
Contact SBE Inc. to discuss your specific requirements.
SBE reserves the right to amend design data
At the Leading Edge of Film Capacitor Technology®
Power Ring Film Capacitors
SBE Part 700D117912-408
TM
Advantages of Power Ring DC Link Capacitors
• Ability to handle higher ripple currents with less
capacitance, weight, and volume
• Use of 105°C ICE coolant for power
electronics cooling
• Demonstrated MTTF >> 20,000 hours for realistic
operating conditions, due to lower losses and
better thermal performance
• Minimization of IGBT overshoot and elimination of the
need for additional snubber capacitors
• Most effective isolation of DC storage or supply
from AC switching artifacts
• Lowest industry ESL at <5nH typical with a
properly integrated bus structure
•
Smaller inverter packaging
•
Overall system cost savings
• Capacitance from 400 µF to 2500 µF and voltages
from 250 Vdc to 1200 Vdc
Integrating the Power Ring in an Existing Design
The “stacked” inverter design evolves from modifying
a typical automotive inverter by utilizing the excess
space left above the IGBT module (figure 1). By bend-
ing the end of the laminar bus plate, the IBGT, die,
cooling plate, and the ring capacitor are “stacked” on
top of each other in a symmetrical fashion. The ring
capacitor is placed underneath the cooling plate.
The cooling plate is shared with the IGBT module
which is mounted on the top.
Figure 1
The SBE Power Ring Film Capacitors™ utilize tradition-
ally available and economical polypropylene and poly-
ester capacitor dielectric films. However, the power
of the shape™ allows for both thermal and electrical
performance which has been unachievable in the film
capacitor industry to date.
Power Ring System Performance
The combination of lowest available Trise, ESR and ESL
coupled with highest ripple current handling capability
enable the development of industry leading inverter
designs with unbeatable performance and reliability.
Lowest available Trise for a given ripple current
Lowest available ESL, less than 5nH demonstrated with
optimal integrated bus
Lowest available ESR, less than 150 micro-Ohms typical
Crown terminal architecture provides for a multitude
of current paths which allows the monolithic capacitor
to function as a distributed element with a much lower
ESR than an equivalent array of smaller parts. SBE has
developed a next generation capacitor simulation tool
that allows accurate calculation of hotspot tempera-
ture to allow optimal rating with excellent reliability.
Figure 2
Figure 2 shows the “stacked” inverter design after the
integration of the ring capacitor and the laminar bus
plate. By now combining both aspects of vertical inte-
gration and the low temperature rise characteristics
of the capacitors, an increase to 50% or more volume
reduction is realistically possible. These improvements
clearly translate into weight and cost reductions.
#SBE-PR-408-01/11
SBE reserves the right to amend design data
SBE Inc. 81 Parker Road
Barre, Vermont 05641 USA
telephone:
802.476.4146
fax:
802.661.3950
web site:
www.SBElectronics.com
e-mail:
PowerRing@SBElectronics.com
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