1DISTRIBUTION A. See first page.
U.S. ARMY COMBAT CAPABILITIES DEVELOPMENT COMMAND –GROUND VEHICLE SYSTEMS CENTER
George Hamilton
VEA
CCDC GVSC
Power Electronics and Architecture
DISTRIBUTION A. Approved for public release; distribution unlimited.
2DISTRIBUTION A. See first page.
WHY IS TARDEC DEVELOPING POWER ARCHITECTURES?
• Electrical power requirements continue to grow as more electronics are added to Military Ground Vehicles (radios, displays, computers, cameras, turret motors)
• Vehicle designs utilize proprietary electrical architectures to meet power requirements
• The Army pays for a new power architecture implementation every time a new vehicle is developed. A reusable standardized architecture implementation is needed to reduce development cost and schedule
0200400600800
10001200140016001800
28VDC Power (Amps)
Alternator Size(Amps)
3DISTRIBUTION A. See first page.
ELECTRICAL POWER ARCHITECTURE SYSTEM REQUIREMENTS
• Provide 45kW @ 28VDC -> MIL-STD-1275E
• Provide 175kW @ 600VDC -> MIL-PRF-GCS600A.
• Silent Watch: 4 kW for 4 hours to vehicle Low Voltage loads with the main engine off
• Import/Export 30kW @ 208VAC
• Utilize the SAE-J1772 connector for exporting/importing High Voltage power
• Power electronics liquid cooling temp @ 105C
• Automated power management with anti-idling
• Meet the Abrams & Bradley environmental requirements contained within ATPD-2404
Enables Energy Weapons and >10% Fuel Savings
4DISTRIBUTION A. See first page.
TEMPERATURE, COOLANT, & AIRFLOW REQUIREMENTS
Ambient Temperatures• Combat Vehicles Operate in Hot, Basic, and Cold
climates as defined in AR 70-38 & MIL-STD-810G• Vehicles without air-conditioning experience
temperatures up to 71C in the crew areas• Touch temperatures less than 60C in 29.5C
ambient• Engine compartment temperatures vary from 121C
– 260C right near the exhaustCoolant Temperatures• Using Engine Coolant or 100-105C allows a
radiator size reduction of 75% from standard 70C electronics coolant
Airflow• No natural airflow on military vehicles. Assume no
airflow. Forced air cooling approaches must be able to survive MIL-STD-810G requirements
5DISTRIBUTION A. See first page.
MIL-STD-1275E & MIL-PRF-GCS600A
6DISTRIBUTION A. See first page.
SAFETY FEATURES – HV INTERLOCKS
NGCVEPA High Voltage Interlocks
7DISTRIBUTION A. See first page.
SAFETY FEATURES – HV DISCHARGE
High Voltage Discharge Requirements
• The voltage differential between the High Voltage Power and High Voltage Return pins of any High Voltage connection shall be less than 2 VDC within 300 microseconds upon HVIL circuit interruption, assuming external power has been removed.
• The assembly shall reduce all stored charge to less than 5 microcoulombsbefore access can be gained for repair activities.
8DISTRIBUTION A. See first page.
NGCVEPA ARCHITECTURE
9DISTRIBUTION A. See first page.
INTEGRATED STARTER GENERATOR CONTROLLER (ISGC)
ISGC Details:
• Power capability - 200kW High Voltage
• Three SSPC channels: 350A, 2 x 100A
• Silicon Carbide (SiC) based
• Liquid Cooled, 105oC
• Operating Temp, -45oC to +121oC
• High Power Density (181W/cu.in; 11kW/L)
• Size: 5.76” x 13.7” x 14”
• Weight: 50 lbs.
10DISTRIBUTION A. See first page.
BI-DIRECTIONAL CONVERTER (BDC)
BDC Details:
• Uses Silicon Carbide (SiC) for the 600Vdc Active bridge
• Uses Gallium Nitride (GaN) for the 28Vdc Active bridge
• Designed to be rack mounted to minimize safety concerns with HV and liquid cooling
• Liquid Cooled, 105oC
• Size: 712 in3
• Weight: 39 lbs.
11DISTRIBUTION A. See first page.
HIGH VOLTAGE POWER CONTROLLER (HVPC)
HVPC Details:
• 12 solid state circuit-protected channels (350/200/50/30x5/10x4)
• Configurable Pre-charge capability for each channel
• Provides central control of safety features:
• Ground Isolation Fault (GIF) Detection
• HV Interlock
• Overcurrent Protection
• Arc Flash Mitigation
• Silicon Carbide (SiC) based
• Liquid Cooled, 105oC
• Size: 6 x 12 x 15”, Weight: 48 lbs.
12DISTRIBUTION A. See first page.
UNIVERSAL HIGH VOLTAGE CONVERTER (UHVC
UHVC Details:
• Non-isolated continuous transfer of 120kW
• Channel 1 – Flexible Voltage
• Lower bound 270VDC MIL-STD-704F
• Upper bound 600VDC MIL-PRF-GCS600A
• Channel 2 – Fixed Voltage
• 600VDC MIL-PRF-GCS600A
• Liquid Cooled, 105oC
• RFQ has been issued to solicit development
Universal High Voltage Converter (UHVC)
Power Conversion
Heater Circuit
Processor
J1939 CAN28Vdc
Channel 2Interlock Channel 2
Iiquid Cooling
Channel 1Interlock Channel 1
13DISTRIBUTION A. See first page.
Silicon Silicon Carbide
ERCA POWER DISTRIBUTION UPGRADE