Induction Motors Dotpoint (1 Viewer)

[untouchablecuz]

Has a question regarding the advantages/disadvantages of the AC induction motor ever been asked in a physics paper (whether it's HSC, CSSA etc)?

 

[helper]

No there hasn't been and while I wouldn't be surprised if there is a question that compares them with DC motors. I wouldn't expect them to have more than that as they deleted the following in 2002:

• explain the advantages of induction motors

 

[water89]

well even it was it isnt that hard to answer is it?

Like the adv/disadv are really quick to memorise:

ie.

ADv
-Cheap
-Simple design
- Efficient as electrical energy is nto passed to the rotor.

Disadv
- Low starting torque
- As load on motor increases current decreases

If it ever comes in an exam just churn those out, youll get the marks..

 

[meggo-meggo]

Disadv
- Low starting torque
- As load on motor increases current decreases

actually, wouldn't the current increase as the load on the motor increases? (as there is a higher slip speed, hence a greater rate of change in flux, hence a greater current induced - faradays law)