Ml Aluminum Housing Double Capacitor 0.5 HP Single Phase Electric Motors

• Application: Industrial
• Speed: Constant Speed
• Number of Stator: Single-Phase
• Function: Driving
• Casing Protection: Protection Type
• Number of Poles: 4
• Model NO.: ML712-4-0.5HP
• Starting Mode: y-δ Starting
• Certification: ISO9001, CCC, CE
• Brand: Liyuan
• Housing: Aluminum
• Cover: Aluminum
• Terminal Box: PPO
• Fan: PP
• Fan Cover: A3
• Shaft: C45
• Transport Package: Carton or Plywood
• Trademark: LIYUAN
• Origin: Fuan
• HS Code: 8501400000
• Production Capacity: 50000 Pieces/Year

Product Description

Ml Aluminum Housing Double Capacitor 0.5 HP Single Phase Electric Motors

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Product Description

Model	HP	KW	Currnet	Speed	Eff	Power Factor	Tst/Tn	Ist/In	Tmax/Tn
ML-712-4	1/2	0.37	2.81A	1400	65%	0.92	1.8	6	1.8

 

Company Profile

FAQ

1. Sweeping failure refers to a mechanical failure of friction between the stator and rotor of the motor, and sweeping failure is the limit state of uneven air gap between the stator and rotor of the motor. For the uneven air gap without scavenging failure, the inspection and analysis of the fault is relatively difficult, and for the uneven air gap with friction, it is relatively easy to analyze because there are specific fault locations and appearances visible. .
    
    
          Stator part eccentricity problem
    
          Relative to the rotor part, the stator is in a static state; the inner circle of the stator iron core of the motor should be coaxial with the openings at both ends of the frame, and ensure that its center line is coaxial with the rotor axis, so as to ensure that the air gap is uniform during the operation of the motor. When the stator part is eccentric, the air gap between the stator and the rotor will have the maximum and minimum air gaps at the fixed position of the stator, and the maximum and minimum air gaps will be on a straight line; when the minimum air gap is zero, the stator and rotor will be in real state. Wipe, which is what we call sweeping; the appearance of this kind of failure is that the stator is partially rubbed, and the corresponding rotor is a week of real rubbing.
    
          Rotor eccentricity problem
    
   For the rotor part of the motor, the outer surface of the rotor should be concentric with the bearing position of the shaft. When the rotor is eccentric, the air gap between the rotor and the stator will also be uneven; in view of the fact that the rotor is a rotating body, the eccentric part is dynamic. Thus the minimum point of the air gap is also dynamic. When the minimum air gap is zero, the stator and the rotor are actually rubbed, and the fault appearance at this time is that the stator is a circle of scratches, while the rotor is local.
    
    
          The problem of loose fit between the base and the end cover
    
           If the stator and rotor are not off-axis, but the fit between the stop of the base and the stop of the end cover is loose, it is easy to cause the deviation of one end (or both ends) of the rotor. According to the limit failure analysis, the friction part will occur at the end of the iron core, and the appearance of the stator part and the rotor circle is mostly. When friction occurs at both ends, the two friction points are distributed diagonally.
    
          key control link
    
          The above three fault symptoms are basically the representative content of uneven air gap. In order to avoid such problems, measures should be taken from the aspects of processing technology, tolerance and quality control of components:
    
          (1) Control of the coaxiality between the two ends of the seam and the core position during the machining process of the machine base; different parts processing manufacturers and motor manufacturers have made necessary adjustments to the processing technology according to the equipment conditions, which can ensure the machine base itself. Concentricity requirements.
    
          (2) Coaxiality requirements between the bearing chamber of the end cover and the stop;
    
          (3) Selection and maintenance of benchmarks during rotor turning;
    
          (4) Tolerance control of radial fit between machine base and end cover, machine base and stator core, end cover and bearing, bearing and shaft, and shaft and rotor core.
    
          For most motor manufacturers, the problem of uneven air gap is relatively small, but there are always some manufacturers with relatively backward processing technology. Vibration, low-frequency electromagnetic sound and other problems are also emerging in an endless stream. In order to solve this problem, it may be solved by the outer diameter of the small rotor of the car or the inner bore of the large stator of the car, which is bound to bring about other performance degradation or even non-compliance.