Electric and Hybrid Vehicles
Syllabus- Module-2
• Hybrid Electric Drive-trains: Basic concept of hybrid traction, introduction
to various hybrid drive-train topologies, power flow control in hybrid
drive-train topologies, fuel efficiency analysis.
• Electric Drive-trains: Basic concept of electric traction, introduction to
various electric drive-train topologies, power flow control in electric drive-
train topologies, fuel efficiency analysis.
,Hybrid Electric Vehicle (HEV)
• The term hybrid vehicle refers to a vehicle with at least two sources of
power
• A hybrid-electric vehicle indicates that one source of power is provided
by an electric motor. The other source of motive power can come from a
number of different technologies, but is typically provided by an internal
combustion engine designed to run on either gasoline or diesel fuel.
• A HEV is a vehicle in which propulsion energy is available from two or
more types of energy sources and at least one of them can deliver
electrical energy.
,• Based on this general definition, there are many types of HEVs, such as:
• gasoline ICE and battery
• diesel ICE and battery
• battery and FC
• battery and capacitor
• battery and flywheel
• Most commonly, the propulsion force in HEV is provided by a
combination of electric motor and an ICE.
• The electric motor is used to improve the energy efficiency and
vehicular emissions while the ICE provides extended range capability.
, • In Figure 1 the generic concept of a hybrid drivetrain and possible energy
flow route is shown. The various possible ways of combining the power
flow to meet the driving requirements are:
• 1. powertrain 1 alone delivers power
• 2. powertrain 2 alone delivers power
• 3. both powertrain 1 and 2 deliver power to load at the same time
• 4. powertrain 2 obtains power from load (regenerative braking)
• 5. powertrain 2 obtains power from powertrain 1
• 6. powertrain 2 obtains power from powertrain 1 and load at the same time
• 7. powertrain 1 delivers power simultaneously to load and to powertrain 2
• 8. powertrain 1 delivers power to powertrain 2 and powertrain 2 delivers power
to load
• 9. powertrain 1 delivers power to load and load delivers power to powertrain 2.
Syllabus- Module-2
• Hybrid Electric Drive-trains: Basic concept of hybrid traction, introduction
to various hybrid drive-train topologies, power flow control in hybrid
drive-train topologies, fuel efficiency analysis.
• Electric Drive-trains: Basic concept of electric traction, introduction to
various electric drive-train topologies, power flow control in electric drive-
train topologies, fuel efficiency analysis.
,Hybrid Electric Vehicle (HEV)
• The term hybrid vehicle refers to a vehicle with at least two sources of
power
• A hybrid-electric vehicle indicates that one source of power is provided
by an electric motor. The other source of motive power can come from a
number of different technologies, but is typically provided by an internal
combustion engine designed to run on either gasoline or diesel fuel.
• A HEV is a vehicle in which propulsion energy is available from two or
more types of energy sources and at least one of them can deliver
electrical energy.
,• Based on this general definition, there are many types of HEVs, such as:
• gasoline ICE and battery
• diesel ICE and battery
• battery and FC
• battery and capacitor
• battery and flywheel
• Most commonly, the propulsion force in HEV is provided by a
combination of electric motor and an ICE.
• The electric motor is used to improve the energy efficiency and
vehicular emissions while the ICE provides extended range capability.
, • In Figure 1 the generic concept of a hybrid drivetrain and possible energy
flow route is shown. The various possible ways of combining the power
flow to meet the driving requirements are:
• 1. powertrain 1 alone delivers power
• 2. powertrain 2 alone delivers power
• 3. both powertrain 1 and 2 deliver power to load at the same time
• 4. powertrain 2 obtains power from load (regenerative braking)
• 5. powertrain 2 obtains power from powertrain 1
• 6. powertrain 2 obtains power from powertrain 1 and load at the same time
• 7. powertrain 1 delivers power simultaneously to load and to powertrain 2
• 8. powertrain 1 delivers power to powertrain 2 and powertrain 2 delivers power
to load
• 9. powertrain 1 delivers power to load and load delivers power to powertrain 2.
