Total Cost Ownership (TCO) calculator flexible tool that will quantify

The Datasheet Archive - 100 Million Datasheets from 7500 Manufacturers.

Total Cost Ownership (TCO) calculator flexible tool that will quantify

Datasheet Thumbnail

Top Searches for this datasheet

Tutorial Examples Total Cost Ownership Calculator
Total Cost Ownership (TCO) calculator flexible tool that will quantify, terms dollars other currency, effects many variables either system design performance power supply components. will present here some examples calculator used answer system design questions determine importance power module parameters.
Example Effect DC/DC Efficiency
Efficiency parameter power modules. affects thermal design, reliability, amount hardware required cost energy operate system. This example examines direct cost impacts energy cost hardware requirements. system configuration AC/DC front that supplies power total power modules follows: Module Type "Other" System Output
purposes example, efficiency modules assumed identical, varied, independent variable, between values 92%. efficiency changes, energy cost will change. Also, less efficient power modules will require additional power from AC/DC front end, raising cost front-end hardware. Other assumptions are: Production Systems/Yr: 1000 Field Support: Oper Hrs/Yr: AC/DC Efficiency: 5000 Interest Rate
Cost Repair: Energy Cost: $0.10
AC/DC Cost: 1.00
model each assumed value power module efficiency, resulting Present Value (NPV) energy cost cost AC/DC converters recorded. These results were then normalized value efficiency plotted shown Fig.
Effect Efficiency
Cost Efficiency
Energy Cost 000) AC/DC Cost Total Cost
000)
000) DC/DC Efficiency
Figure shows that total these costs, even this relatively small system, significant. There approximately million dollar change over range efficiencies evaluated. Clearly, using high efficiency converters (>80%) significant payback. addition direct cost impacts energy cost additional AC/DC converter hardware, there also significant indirect costs associated with power module efficiency. Less efficient modules will dissipate more heat, either requiring additional cooling hardware raising operating temperature power system. increased temperature will decrease reliability increase reliability cost shown next example.
Example Effect Reliability
this example, will explore reliability power modules, influenced system operating temperature, affects Total Cost Ownership. will system that implemented with Ericsson power modules assume that system designer control over ambient (and consequently case) temperatures controlling inlet temperature and/or airflow though system.
system composed following module types: Module Type PKG4611PI PKF4611 Number Efficiency Cost Each
Other system parameters assumptions follows: Production Systems/Yr: 1000 Field Support: Oper Hrs/Yr: AC/DC Efficiency: 5000 Interest Rate
Cost Repair: $250 Energy Cost: $0.10
AC/DC Cost: 1.00
effect operating temperature failure rate first determined using Ericsson Reliability Calculator. differential between ambient module case temperature assumed. results follows: Module Failure Rate PKF4611 PKG4611PI 35.0 38.1 41.8 46.1 51.2 57.1 64.1 72.2 81.7 92.8 235.5 260.8 289.4 321.8 358.4 400.0 447.0 500.3 560.7 629.2
Ambient Temp Case Temp
calculator then times using above module failure rates. resulting values Reliability Cost (NPV) plotted function Ambient Temperature shown Fig.
Effect Reliability
$180 Reliability Cost $160 $140 $120 $100 Ambient Temperature Reliability Cost
Reliability Cost ranges from $63,000 $169,000 over range operating temperature, demonstrating that system thermal design appreciable effect reliability cost. This effect even more significant when using modules with higher overall failure rates. example, Ericsson modules above example replaced with typical competitive products with higher failure rates, system cost implications estimated following calculation. From Datasheets Temp. Specified MTBF Hours 800,000 605,000 Ambient Ambient
Competitive Replacement substitute substitute
1250 1653
Module Reliability Estimator contained this then used find estimated failure rate function temperature: Module Failure Rate substitute substitute 1250 1575 1984 2500 3150 3969 5000 6300 7937 10000 1653 2083 2624 3306 4165 5248 6612 8331 10496 13224
Ambient Temp Case Temp
calculator again using these values. order isolate effects module reliability, other module-related parameters (efficiency cost) were kept same corresponding values Ericsson modules. system-related parameters assumptions were kept same. results calculator, comparing Ericsson competitive solution, plotted below Fig.
Fig. Reliability Cost Comparison
Reliability Cost Ambient Temperature Ericsson Modules Competitive Modules
Figure shows extreme importance both power module failure rate effects system operating temperature. similar approach used evaluate these trade-offs your specific system substituting values from datasheets modules being considered along with your system-oriented parameters.

Total Cost Ownership (TCO) calculator flexible tool that will quantify

Top Searches for this datasheet

Other recent searches