What is the structural difference between a two-speed motor and a regular motor
The change of the pole winding method of the motor is achieved by changing the stator winding of the motor. Two-speed motor is general internal winding is 4/6 (or: 6/8), and lead to the winding respectively, through the contactor control to achieve the two kinds of rotation speed of the machine. Take the example of the four-sixth pole double speed motor, which is a low speed 6, 1000-rpm (delta connection), high speed 41500 RPM (double star connection).
There are two sets of coils in the two-speed motor slot, and the ordinary motor has a set of coils through the special switch control speed. This is the main difference.
Most of speed regulating pole change motor for squirrel-cage rotor motor, its structure is similar to the basic series three-phase asynchronous squirrel cage motor, now the domestic production of two, three, four speed 3 classes. Common asynchronous motor rotor speed formula: n = 60f/p, ordinary motor has only one speed.
