AdvancedTopic 86 of 102Manufacturing, Robotics & Systems
Electric and hybrid powertrains
Motors, batteries and control replace or assist combustion engines.
In depth
BEVs use battery, inverter and motor with regenerative braking; HEVs combine engine and motor (series, parallel, power-split); PHEVs add plug-in charging. Efficiencies: EV ~85–90% tank-to-wheel vs ~25–35% for ICE. Concerns: range, charging, battery cost, thermal management and grid impact.
Key points
- Regenerative braking
- Motor types PMSM and induction
- Energy consumption kWh/100 km
ExampleA Prius power-split device blends engine and motor power through planetary gears.
What is Electric and hybrid powertrains?
Motors, batteries and control replace or assist combustion engines.
Why is it important to understand electric and hybrid powertrains?
Electric and hybrid powertrains reduce emissions and use energy more efficiently, so they are changing the automotive industry.
What is regenerative braking?
The motor acts as a generator during braking and returns energy to the battery, which recovers energy that would be lost in friction brakes.
What is the difference between series and parallel hybrids?
In a series hybrid the engine only generates electricity, while in a parallel hybrid the engine can drive the wheels directly, often with a motor helping.
How is Electric and hybrid powertrains used in practice?
Typical applications include designing a motor drive for an electric car with regenerative braking, choosing a series or parallel hybrid layout for a delivery van and controlling the battery charge in a plug-in hybrid for city driving.
What should I learn before Electric and hybrid powertrains?
Study "Automotive engineering" first (topic 85 of 102 in Manufacturing, Robotics & Systems). It covers the groundwork this topic builds on.
What are the key points of Electric and hybrid powertrains?
Regenerative braking. Motor types PMSM and induction. Energy consumption kWh/100 km.
Can you give an example of Electric and hybrid powertrains?
A Prius power-split device blends engine and motor power through planetary gears.
What comes after Electric and hybrid powertrains?
The next topic is "Battery systems", which builds directly on this one.
How difficult is Electric and hybrid powertrains?
It is classed as Advanced in Manufacturing, Robotics & Systems (topic 86 of 102). It is an advanced topic. It assumes you are comfortable with the intermediate topics in Manufacturing, Robotics & Systems.