The advantages are simple construction, low cost and low maintenance. The limitations of the cage induction motor of basic standard design are low breakaway torque and high starting current, the former typically ranging from 0.5 to 2.0 times and the latter three to seven times rated values, ...
Definition:A slip ring induction motor is referred to as an asynchronous motor as the speed at which it operates is not equal to the synchronous speed of a rotor. The rotor of this type of motor is wound type. It comprises of a cylindrical laminated steel core and a semi-closed groove a...
INDUCTION-MOTOR CONSTRUCTION.HENRY F. ELSHOFF
cagewindingwoundrotorinductionmotor 5 4.1.2Operationmodesofinductionmachine slipspeed nnn s −=∆ Therotorspeednisalwaysdifferentfromthesynchronous speedn s . slip 100% s s nn s n − = n s =60f/P synchronousspeed 6 (a)electromagneticbraking(b)motor(c)generator operationmodesofinduction...
4.1.1ConstructionofInductionMotors * squirrel-cageinductionmotors wound-rotorinductionmotors 1.Stator statorcore statorwinding frame cover. 2.Rotor rotorcore rotorwinding shaft. * * cagewindingwoundrotorinductionmotor * 4.1.2Operationmodesofinductionmachine ...
The full-load speed is a function of the motor design and power and is usually in the range of 94–99% of the synchronous speed; the difference is the “slip.” Figure 2 shows the typical construction of a squirrel-cage induction motor. The rotor squirrel cage, detached from the steel ...
Construction Diagram In the above diagram, both the resistor & the auxiliary winding are connected in series. The flowing current in the windings cannot be equal consequently the rotary field is not consistent therefore, the initial torque is little. At the beginning of the motor, the two windin...
Construction of Deep Bar Double Cage Induction Motor In deep bar double cage rotor bars are there in two layers. The outer layer contains bars with small cross-sections and high resistance, which are shorted at both ends. This results in low flux linkage and low inductance. The high resistanc...
This motor is not powerful, and it needs something else to get it started, which is not shown in the diagram. Once it gets going, the rotor has to come around to the correct position for repulsion, just in time for the next ac cycle to occur. This is one of the principles of ac ...
3 Phase Induction Motor Construction Stator frame can be constructed using cast iron, aluminum, or rolled steel. The stator frame provides necessary mechanical protection and support for stator laminated core, windings, and other arrangements for ventilation. The stator is wounded with three-phase wind...