KHI PROPRIETARY
T-IDG® Technology Overview
March 26, 2015
Dr. Tatsuhiko GoiSr. Manager, Drive System EngineeringKawasaki Heavy Industries,Ltd.
Presentation @Europe-Japan Symposium
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The IDG(Integrated Drive Generator) is an aircraft power generation device which houses a Continuously Variable Transmission(CVT) to generate 400Hz constant frequency power regardless of the engine speed.Traction Drive IDG (T-IDG® ) is an innovative IDG which employs a traction drive mechanism as the CVT instead of a hydro-mechanical CVT used in conventional IDGs.T-IDG® was selected as the main generator for JSDF P-1/XC-2 aircraft and have shown its good reliability since 2007.
Introduction
XC-2
P-1*IDG: Integrated Drive Generator
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Principle of Traction Drive CVT
Speed Decreasing Mode Speed Increasing Mode
Typical Configuration of Traction Drive CVT*
Speed Ratio=R1/R2
R2R1
INPUT DISC
OUTPUT DISC
R1R2
POWER ROLLERTRUNNION
Loading Cam
Engine Generator
TILTING
*Continuously Variable Transmission
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Outline of T-IDG® MK III
T-IDG Cutaway
T-IDG Data•Cont.Rating:90kVA•5 min. Rating:112.5kVA•5 sec. Rating : 150kVA•Frequency:400±5Hz(3)•Voltage:115/200V•Size:375L×460W×330Hmm •Weight:54.0kgf(dry)
Traction Drive CVT(Speed Ratio 0.5~2.0)
Input Shaft(4500-9200rpm
variable)
Main Generator(90kVA;24000rpm const.)
Output Terminal
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Major Features of T-IDG®
High Efficiency (Low Heat Rejection or Low Power Loss)= leads to low fuel consumption
smaller oil cooler (substantial weight reduction)
High Reliability
Compatibility with the existing IDG(interface, envelope, weight, overhang moment, etc.)
Growth Potential up to 200kVA
No straight thorough speed(no operational limitation)
Competitive Total Life Cycle Cost(TLCC) Aluminum Housing(high corrosion resistance) Less Maintenance
Longer Servicing Interval No intermediate checks such as oil level, filter condition, etc)No speed control adjustment
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1999-2005: prototypes Mk I to Mk III were developed and tested (total 9 prototype IDGs were used). A series of development tests as well as an actual engine test using RR Trent 500 were performed.
In 2005 the qualification test for Mk IV versionfor P-1/XC-2 was completed.
Total 110,000 hour Lead The Fleet Test since Mar.2006 ( av.22,000hr5 T-IDGs)was completed in Sept.2013.
P-1 first flight: Sept.2007,XC-2 first flight: Jan. 2010Since then good reliability has been proven.
T-IDG® Development Status
T-IDG onTrent 500 Engine
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Time Elapse(sec)
Out
put
Freq
uenc
y(H
z)
MIL-STD-704E Frequency Allowable LimitsIDG Load
Output Frequency
Typical Test Results(1/2)
T-IDG Heat Rejection(@90kW Load)
150%(112.5kW) Step Load
Load
(kW
)
1000hr Endurance TestPer MIL-E-85583
Endured Traction Drive Parts
Power Roller
Disc
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Typical Test Results(2/2)
Attitude Test30deg Nose Down
T-IDG
Drive Motor
Tilting Bed
T-IDGEMI Test
Oscillator
T-IDG
Drive Motor
Vibration Test
Cold Temperature/ Altitude Test
Altitude/Cold Temp Chamber
Drive Motor
Refrigerator
Inside the Chamber
Oil Cooler T-IDGFurnaceT-IDGDrive Motor
High Temperature Test
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Technology Update
Optimization of CVT geometry
High stiffness structure
Hydraulic clamp control
Compact
High Responsiveness
Compact
High EfficiencyOptimization of control system
High Durability
High EfficiencyHigh Stability
High Responsiveness
High Durability
High EfficiencyOptimization of
oil flow and parts cooling
Extensive R&Ds have been conducted for the next generation T-IDG development.
© 2014 Kawasaki Heavy Industries, Ltd. All Rights Reserved 10KHI PROPRIETARY
Summary
Traction Drive IDG(T-IDG® ) has proved its high reliability and high efficiency on the P-1/XC-2 aircraft and in the 110,000 hour “Lead the Fleet Test”.
In parallel KHI has been improving the CVT technology to enhance its competitiveness.
The T-IDG® will meet the requirements for future MEAs.
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