I just need answers hat is the difference between the locked rotor (starting tor
ID: 2087384 • Letter: I
Question
I just need answers
hat is the difference between the locked rotor (starting torque) and the breakdown torque? 1) Breakdown torque is the torque output of the motor at standstill, while locked rotor torque is the maximum torque output of the motor. 2) Breakdown torque is the minimal point reached in the torque speed curve soon after startup, while locked rotor torque is the maximum torque output of the motor. 3) Locked rotor torque is the torque output of the motor at standstill, while breakdown torque is the maximum torque output of the motor. 4) Breakdown torque is the point in the torque-speed curve where the motor is in danger of failing, while locked rotor torque in the torque output of the motor at standstill 5) Items (3) and (4) B)In the video demonstration of the split phase motor, how do the cooling fins keep the motor from overheating? 1)The fins rotate around the stator windings at the speed of the motor, creating a large air current. 2)The large air current created by the rotating fins channels away the hot air located around the windings 3) As the fan cools the air around the windings, the differential temperature between the windings and ambient air increases. This allows heat to flow awav from the windings 4) ltems (1) and (2) 5) ltems (1), (2) and (3)Explanation / Answer
(A)answer-(5)-items 3 and 4
maximum torque is also called breakdown torque.
if required torque is greater than breakdown torque then the motor will not be able to supply the load . and eventually rotor will stop from rotating.
(B) 5) items 1,2 and 3
fins create large air current which forces hot air located around the stator windings.
cool air coming from the fins forces the hot air as well as create temperature difference as the stator windings are hot so heat flows by convection between this cold air and hot windings causing the cold air to be hot which is then forced out by the incoming cold air.