What is the second type of multispeed induction motor besides the multiple-winding motor?

The second type of multispeed induction motor, aside from the multiple-winding motor, is the consequent-pole motor. This type of motor is specifically designed to provide multiple speed operations through the use of different pole configurations. In a consequent-pole motor, the rotor operates on the principle of various magnetic poles generated by the stator windings, allowing it to run at different speeds under different conditions.

In addition to its design, the consequent-pole motor can effectively manage speed variations by changing the number of poles in the circuit, which directly affects the motor's synchronous speed. This feature makes it particularly useful for applications requiring multiple speeds or for conditions where the load demands various operating speeds without changing the frequency of the supply.

Other options, such as series motors, variable speed motors, and permanent magnet motors, do not specifically represent the second type of multispeed induction motor. Series motors primarily rely on armature and field windings being in series, variable speed motors encompass a wider range of technologies and methods outputting variable speeds, and permanent magnet motors utilize magnets instead of induction principles to achieve rotation. Each of these types has its unique characteristics and applications but does not serve the same purpose as the consequent-pole motor within the context of multispeed induction motors