ac motor control and ev applicationsphome.postech.ac.kr/user/cmdlab/acmc(ch12).pdf · ac motor...
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AC Motor Control and EV Applications
Hybrid Electric Vehicles
Chapter 12
HEV Basics
Benefits of HEVs:
1.Idle off 2.Regenerative braking3.Power assist or power split
Types of HEVs
0%
Electric100%
Electric
Traditional
ICE
Mild HEV PHEV 10 Battery Electric
Vehicle (`BEV’)
Micro HEV Full HEV PHEV 20
PHEV 40
PHEV 60
Engine
Battery
Motor
Gas
Generator
Battery
Motor
Gas
Battery
Motor
(a) (b) (c)
POSTECH CMD Lab
Types of HEVs
ICE Brake Specific Fuel Map
1000 30002000 4000
20
(Nm)
40
60
80
100
(rpm)Engine speed
Eng
ine
torq
ue
500 g/kWh
400350
300
270
250
240
230 235
0
Optimal operating line
120 Max. torque line(Max. throttle angle)
Engine offin HEV
Engine offin HEV
POSTECH CMD Lab
Input Split e-CVT Architecture
Engine
Drive to Wheels
Engine
Drive to Wheels
Engine
Drive to Wheels
Converter
InverterBattery
Generator
Motor
Converter
InverterBattery
Motor
Converter
InverterBattery
Generator
Motor
Power SplitDevice
(b) Parallel (c) Series/parallel(a) Series
POSTECH CMD Lab
Planetary Gear
Ring gear
Carrier
Sun gear
(a) (b)
S
C R
(c)
Planetary Gear
Generatorrpm
Enginerpm
Motor rpm(vehicle speed)
Sun gear Carrier Ring gear
Planetary Gear Torque Equation
Torque and powerbalance equation
E-CVT of Toyota Hybrid System
Power Split with Speeder and Torquer
Lever Diagram
Vehicle Launch and Battery EV Mode
Normal Driving Mode
Normal Driving Mode (Sankey Diagram)
FD loss-2635WMechanical drive train
M/G. & inv. loss-216W
Electrical drive train
Power Boost Mode at Sudden Acceleration
Power Boost Mode (Sankey Diagram)
FD loss : -6829 W
M/G, inv. losses: -1944 W
Regenerative Braking
Engine Cranking and Battery Charging
Prius II Driving Cycle Simulation
Battery SOC
US06Hwy
ICE freq. map
UDDS
Series Drive Train
ICE
Generator Motor
ReductionGear
DC/DCConverter
Inverter
Power Bus
x 0.92 x 0.97
ACDC
x 0.97
DCAC
x 0.92
Total elec. path efficiency = 0.8
Inverter
Battery
Motor Operation Points (Series Drive Train)
US06HwyUDDS
Engine Involvement in a Series HEV
UDDSUDDS
SOC
Engine
Parallel Drive Train
Overall Parallel Hybrid Control Block
BMS
Main battery
14Vbattery
DC/DC converter PowerControlUnit
Gatedriver
CVT
Engine
TPS
Throttlebody
Enginecontroller
CVTcontroller
PMSM
Throttle command
Throttle angleTemperatureResolver
HallCurrentSensor
CAN
Inverter
voltage
Current
On/off
CAN
Batterycellvoltage
SDU
Parallel Hybrid Engine/Motor Operation Points
UDDS US06Hwy