Single-phase motor crane motor up and down wiring method
Single-phase motors generally refer to low-power single-phase asynchronous motors powered by single-phase AC motor. This type of motor usually has two-phase windings on the stator, and the rotor is a common squirrel-cage type. The distribution of the two-phase windings on the stator and the different power supply conditions can produce different starting and operating characteristics. This is related to the wiring of the single-phase motor, which we will introduce in detail below.
This is the most commonly used motor type, and the most commonly used in the market is squirrel-cage asynchronous motors, including squirrel-cage induction motors and wound induction motors. Line induction motor: three-phase symmetrical windings are embedded in the stator, connected with insulators, and insulated from each other. Because it is interconnected, it is also called capacitance.
Due to their simple structure, they usually interact with the rotor armature windings and have a certain degree of insulation. Armature winding: Two-pole slots are connected in series in the stator circuit. A group of coils in the figure are used for crossed or approximately circular three-phase windings, which belong to a squirrel induction motor.
The squirrel-cage winding is connected in series with the two-pole decompression starting winding in the stator circuit, which becomes the starting method of the squirrel-cage asynchronous motor. The starting method and starting principle of squirrel cage asynchronous motor: When the three-phase current of the motor stator passes through the stator winding, the direction of the current flowing in the winding starts to rotate as shown in the figure. Since the direction of the current rotates continuously with the rotation direction of the rotor, the rotation direction of the motor is changed.
In the actual process, the structure and working principle of squirrel-cage asynchronous motor are basically the same as the winding. A rotating magnetic field is generated in the stator windings only when the direction of the rotating magnetic field of the rotor changes.
The rotating magnetic field formed by the stator winding interacts with the cutting magnetic field of the rotor winding to generate electromagnetic torque and electromagnetic torque.
When the motor starts in the early summer, the rotor winding is heated to the air gap between the aluminum conductor and the stator core, and the squirrel-cage asynchronous motor starts automatically. A closed loop is formed.