What phenomenon does the asynchronous motor rotor open?

With the sudden opening of the rotor, a large vibration will occur, and the rotor current will become 0.
If it is not a complete opening (referring to the three -phase winding of the three -phase winding at the same time), the motor can also be run, but because the rotor cannot be sensing normally, the vibration of the motor will continue until the fixed rotor winding is burned together together damage. If it is completely open, the electric opportunity stops quickly and will not have much impact on the settings of the settings.
The working principle of the single -phase asynchronous motor is in the AC motor. When the stator winding is through the AC current, the electronomic magnetism is established, which has a great impact on the motor conversion and operating performance. Therefore, the single -phase communication winding through the single phase communication generates the pulse magnetic momentum. This magnetic momentum can be decomposed into two rotating magnetic momentum with equal amplitude and opposite speed, so as to establish a positive and reversal in the air gap in the air gap. Magnetic field and. These two rotating magnetic fields are cut into rotor conductors, and induced electromotive momentum and induction current are generated in the rotor conductor.
The interaction of the current and the magnetic field produces positive and anti -electromagnetic torque. Positive electromagnetic torque attempts to make the rotor rotate; the reverse electromagnetic torque attempts to reverse the rotor. These two torque superimposed are the synthetic torque to promote the rotation of the motor.
Whether it is or, the relationship between their size and the turning rate is the same as the three -phase asynchronous motor. If the speed of the motor is,
For the positive rotation magnetic field, the rotation rate is:
For the reversal magnetic field, the rotation rate is:
See the main characteristics of the figure on the left
The main characteristics of the electric motor of the single phase, the electric motor of the single phase, is:
(1) n = 0, s = 1, t = t t-= 0, indicating that the single-phase asynchronous motor is not started and turns. Morning, if you do not take other measures, the motor cannot be started.
(2) When S ≠ 1, T 0, T has no fixed direction, it depends on the positive and negative of S.
(3) Due to the existence of reverse torque, the synthetic torque is reduced, so the overload capacity of the single asynchronous motor is low.
The principle of starting work of the capacitor division of the capacitance
The switch K closed when starting, so that the two -winding current i1, i2 phase difference is about 90 °, which generates rotary magnetic field, the motor turns; rotate positive
Often, the centrifugal switch is thrown away, and the starting winding is cut off.
The working principle of the hood polar single -phase motor
After the stator passs the current, some magnetic flux passes through the short circuit ring and generates induction current. The current in the short circuit ring hinders the change of magnetic flux, which causes the short -circuit ring part and the magnetic flux generated by the short circuit ring part to form a phase difference, thereby forming a rotating magnetic field and turning the rotor.
The rotation direction of the motor in the figure above: instantaneous rotation. Because the magnetic flux of the short circuit ring is led by the magnetic flux of the short circuit ring. The single -phase asynchronous motor power of the single -phase and different trail motor is small, and it is mainly made into small motors. It is very widely used, such as household appliances (washing machines, refrigerators, electric fans), electric tools (such as flashlight diamonds), medical devices, automated instruments, etc.