Question { 13876 }

Why are the HV motors are connected in star connection?

Answer

In Star connected HT Motors , stator applied phase voltage
reduced by root 3 times so Current would be redueced
equivalant to this as well as stator Line current is equal
to phase current.
In Delta connected winding full line voltage(equal to phase
voltage) is applied on each phase so stator current would
be higher (root 3 times more than star connections).

Question { 4290 }

difference between slippring induction motor and Generator?

Answer

The Main Difference between Slipring Induction Motor and
Generator is Field Winding(Which is excited by DC source
while Brushless / direct linked in field stationary
condition in Genrator case).
Second thing , Generator speed likely remains constant and
voltage stability is achieved by field excitation and in
SRIM case speed variation ie rquired as per load by GRR,
LRS, SPRS connected to its Rotor through Sliprings.