I need to find out how calculate magnetic forces appearing in AC induction motor rotor when it is not magnetically centered inside the stator.
The magnetic centering force is a function of the magnetizing current of the motor (basically the no load amperage of the motor), air gap flux density, air gap radial distance, number of aligned rotor and stator segments (ends of rotor, and stator and radial air ducts), voltage, air gap axial length and axial misalignment between the rotor and stator. [22, 23] The magnetic centering force increases from zero when the motor is operating on its magnetic center (magnetic equilibrium), while the rotor is displaced axially relative to the stator. See Figure 15. Typically, at a 0.125” axial displacement, non-ducted rotors may develop 50 to 150 pounds of axial centering force, whereas rotors with 12 radial ventilating ducts aligned with stator duct may develop up to several hundred pounds. At start-up, these motors will develop axial forces up to three times these steady state values.
Well, EXcuuuusse Me!Osvaldo said:I ask for advise to somebody with experience and not somebody advising me to "to expand my vocabulary and then phrase a well stated question" An expert in the matter (if there is one in this group) will understand my problem and would offer directions. The website jim hardy posted is vague and not very conclusive. OK for a begginer.
Osvaldo said:OK for a begginer.
Osvaldo said:Probably you never have to calculate it because you did not have to design the thrust bearing for a gear increaser coupled to a 1600 kw AV induction motor.
I ask for advise to somebody with experience and not somebody advising me to "to expand my vocabulary and then phrase a well stated question" An expert in the matter (if there is one in this group) will understand my problem and would offer directions. The website jim hardy posted is vague and not very conclusive. OK for a begginer.
Magnetic balance in AC induction motors refers to the equal distribution of magnetic flux across the stator and rotor of the motor. This balance is necessary for efficient and smooth operation of the motor.
Magnetic balance is important in AC induction motors because an imbalance in the magnetic flux can cause the motor to vibrate, produce excessive noise, and reduce its efficiency. It can also lead to premature wear and tear of motor components.
Magnetic balance in AC induction motors can be achieved by properly designing the stator and rotor, using high-quality materials, and ensuring proper installation and alignment of the motor.
An unbalanced magnetic field in AC induction motors can lead to increased energy consumption, decreased motor performance, and potential damage to motor components. It can also cause overheating and failure of the motor.
Yes, external factors such as temperature, voltage fluctuations, and mechanical stresses can affect the magnetic balance in AC induction motors. Regular maintenance and monitoring can help ensure that the motor remains in balance despite these external factors.