Week 3 Session 7
Compare the different motors used in EV and list down the advantages and disadvantages of each.
Ans:
Different types of EV motors
Brushed Dc Motor
Advantages:
- It gives the maximum torque at low speed.
Disadvantages:
- Bulky structure
- Low efficiency
- Heat generation at brushes
Usage:
It is used by the Fiat Panda Elettra.
Permanent magnet brushless DC motor(BLDC)
Advantages:
- No rooter copper less
- More efficiency than the induction motors
- It is lighter
- Smaller
- Better heat dissipation
- More reliable
Disadvantages:
- Short constant power range
- When speed increases torque decreases
- Expensive
Usage:
Toyota Prius(2005)
Permanent magnet synchronous motor(PMSM)
Advantages:
- can be used without using gear systems in a different speed range
- More efficient
- Compact
- Best suitable for in-wheel application
- Gives high torque even at least speeds
Disadvantages:
- During the in-wheel operation at high speed it losses the high amount of iron
Usage:
Toyota Prius, Nissan Leaf, Soul EV
Induction Motor:
Advantages:
- It is the most mature commutator less motor drive system
- By employing the field operation control it can be operated like separately excited DC motor
Usage:
Tesla Model S, Tesla Model X,Toyota RAV4,GM EV1
Switched Reluctance motor(SRM)
Advantages:
- It is simple
- Robust construction
- High speed
- Low cost
- Constant long power range
- Fault-tolerant
- Higher power density
Disadvantages:
- Makes so much of noise
- Low efficiency
- Larger
- Heavy
- Complex and design control
- Problem creating in manufacturing and controllability
- Low power
Usage:
Chloride Lucas