Yc Series Industrial 7.5 HP 1750 Rpm Tefc Single Phase Electric Universal Motor

• Application: Industrial
• Speed: Constant Speed
• Number of Stator: Single-Phase
• Function: Driving
• Casing Protection: Protection Type
• Number of Poles: 4
• Model NO.: YCL-132M-4 7.5HP
• Starting Mode: y-δ Starting
• Certification: ISO9001, CCC, CE
• Brand: Liyuan
• Housing: Iron-Cast
• Cover: Iron-Cast
• 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

YC series industrial 7.5 hp 1750 rpm tefc single phase electric universal motor

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Product Description

Model	hp	kw	Current	Speed	Eff	Power Factor	Tst/Tn	Ist/In	Tmax/Tn
YCL-132M-4	7.5	5.5	32.1A	1750rpm	82%	0.95	2.2	6.5	2

Company Profile

FAQ

1. The cause of motor vibration turned out to be a process blind spot
   
   Dynamic balancing of different types of rotors
   
   Dynamic balancing of rigid rotors
   
   For the rotor whose working speed is much lower than the critical speed, the deformation caused by the unbalance is very small. This kind of rotor can be treated as a rigid body, and the dynamic balance can be carried out at low speed, which is called the dynamic balance of the rigid rotor. During the dynamic balance of the rigid rotor, the centrifugal inertial force system caused by the unbalance of each micro-segment can be simplified to two arbitrarily selected sections (generally two end faces of the rotor are selected). Correction (removing weight or counterweight) can complete dynamic balancing. A dynamic balancing machine can be used to find the orientation and magnitude of the unbalance on the two sections.
   
   Common dynamic balancing machines are divided into two types: soft support type and hard support type. The former detects the vibration caused by the unbalanced amount; the latter detects the force of the unbalanced rotor on the support. The problem of dynamic balancing of rigid rotors has been solved well. At present, the International Organization for Standardization (ISO) has stipulated the accuracy of dynamic balance of various rigid rotors.
   
   Dynamic balancing of flexible rotors
   
   When the rotor working at supercritical speed is started and braked, the speed must pass the critical speed, and the unbalance will cause obvious deformation of the rotor. If the deviation of the centroid of each micro-segment of the rotor to the rotation axis has a significant influence on the deformation, the rotor cannot be treated as a rigid rotor, and the corresponding dynamic balance is called the dynamic balance of the flexible rotor. There are two ways to balance this type of rotor:
   
   Mode shape method. The unbalance is decomposed according to the natural mode shapes of each order of the rotor. If the rotational speed during dynamic balance is close to a certain critical rotational speed, the natural mode shape of this order is prominent above the other orders. By examining this mode shape, it is possible to find the size and location of the corrective mass needed to eliminate this order of unbalanced components. Step by step, the dynamic balance can be completed.
   
   
   Influence coefficient method. Select several calibration surfaces and several measurement surfaces on the rotor and perform multiple running corrections. The vibration of a measurement surface caused by the unit correction amount on a calibration surface at a certain speed is an influence coefficient. By measuring or calculating these influence coefficients, it is possible to determine the position and size of the counterweight (or de-weight) for each calibration surface to limit the vibration of each measurement surface to a certain value according to the vibration caused by the unbalanced amount. On the basis of these two methods, other methods have also been developed, such as the mode shape circle method.
   
   In general, the balancing rigidity of the low-speed balancing machine, including the quasi-rigid rotor, has little difference at different speeds. Because the rigid rotor can be balanced at any speed to work at the working speed, the difference at different speeds is not large. If a flexible rotor is being balanced, the balance measurement will vary as the rotational speed increases. In this case, it needs to be balanced on a high-speed balancing machine.