powering next-generation serverslidow+ibm+cooling+sep05+final+ir.pdfnote (1): lawrence berkley...
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Powering Next-Generation Servers
Alex LidowCEO, International Rectifier
September 20, 2005
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Keeping Servers Cool
Increasing Processing and Storage Demands are pushing the limits in thermal management
• Server power densities increasedfrom 800 W/ft2 to 1600 W/ft2 in last5 years (1)
• More than 50% of the energy consumed in powering and cooling the data center
• Cost of energy for a 500KWdata center exceeds $5M overa 10 year life!
Note (1): Lawrence Berkley National Labs, APC White Paper 2003
Cost of Energy for a 500KW Data Center
HeatTransfer$750K
Power Systems
$720K
Cooling Systems$1400KIT Loads
$2350K
Based on 500KW data center,over 10 year life, at $0.10/kWhr
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Cooling Systems
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Fan Blower Motor Technology
sensors
Brushless DC MotorTrapezoidal ControlUsing Position Sensors
Permanent Magnet AC MotorSinusoidal ControlPosition Sensorless
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Higher Efficiency
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Silent OperationNoise Data Comparison
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A New Approach to Motor Control
Modular Control Engine• Pre-designed control
elements• Fast deterministic
computation• Configurable control
algorithm• Configuration
software with GUI
• Angle estimator algorithm forsensor-less control
• Sinusoidal field oriented controlfor high efficiency and low noise
• Single shunt current re-constructionfor low cost
• Digital PFC algorithm – Improved PFand THD
• Time share withmotor control
• Multiple power conversion andmotor controlunder same MCE
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Mixed-Signal Controller Silicon Implementation
• MCU for application code and communication• MCE for motor control and power conversion control• ASE for analog signal processing
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Driving multiple fan blowers with one controller
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Power Systems
$720K
Cooling Systems$1400KIT Loads
$2350K
HeatTransfer$750K
Heat Transfer Savings
• Efficiency gains from 70% to 90% projected
− Transition from Brush DC, to Trapezoidal Control Brushless (BLDC), to Sensor-less Sinusoidal Control Permanent Magnet (PMAC)
• Energy savings of $160K from higher fan motor efficiency
• Energy savings of $60K associated with reducing cooling system costs
− Less heat from the fan motors
Cost of Energy for a 500KW Data Center
Based on 500KW data center,over 10 year life, at $0.10/kWhr
HeatTransfer$590K
Power Systems
$720K
Cooling Systems$1400KIT Loads
$2350K
HeatTransfer$590K
Power Systems
$720K
Cooling Systems$1340KIT Loads
$2350K
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Power Systems
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Gen 1 DirectFETsGen 1 xPhaseMulti-phase
Advanced DirectFETsGen 2 xPhase
Coupled Inductors20% shrink
Gen 2 DirectFETsGen 3 xPhase
Digital Comm’ns40% shrink
Advancedpower switches
Gen 4 xPhase60% shrink
Vcore DCDC Efficiency Roadmap12V Input, 1.2V & 130A Output
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ZVS Full BridgeSuperJunction FET
Si PFC DiodeDiode rectification
ZVS Full BridgeAdvanced SJ FET
SiC PFC DiodeSync rectification
Bridge-less BoostOCC PFC
SJ FET + SiC PFCAdvanced Topology
Advanced BLB + OCCHigh-level IntegrationAdvanced Switches
Efficiency
ACDC Efficiency Roadmap110~240VAC Input, 12V & 1KW Output
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Power System Savings
• Significant efficiency gains projected:
− DC-DC converters from 88% to 95%
− AC-DC converters from 87% to 94%
• Energy Savings of $440K from higher power systems efficiency
• Energy savings of $140K associated with reducing cooling system costs
− Less heat from the power system
Cost of Energy for a 500KW Data Center
Based on 500KW data center,over 10 year life, at $0.10/kWhr
HeatTransfer$590K
Power Systems
$720K
Cooling Systems$1340KIT Loads
$2350K
HeatTransfer$590K
Power Systems
$280K
Cooling Systems$1340KIT Loads
$2350K
HeatTransfer$590K
Power Systems
$280K
Cooling Systems$1200KIT Loads
$2350K
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Future Server Thermal & Power Management Architecture
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• All power stages reach 90~95% efficiency range
• Total Energy Cost Savings of $800K
HeatTransfer$590K
Power Systems
$280K
Cooling Systems$1200KIT Loads
$2350K
Re-Defining Server Power Management
Cost of Energy for a 500KW Data Center
HeatTransfer$590K
Power Systems
$280K
Cooling Systems$1200KIT Loads
$2350KEnergySavings$800K
• The cost to gain these savings?
• If BOMs increase 20% . . . that’s $9,000 per data center
• Nearly a 1000% ROI per year of operation!
• Central intelligence of all power systems will create further gains in energy savings