ML series 1440 rpm 2 hp 240v single phase electric motor
Recommendation
Product Description
| Model |
HP |
KW |
Currnet |
Speed |
Eff |
Power Factor |
Tn |
Tmax/In |
Tst/Tn |
| ML-90L-4 |
1.5 |
2 |
9.03A |
1420 |
76% |
0.95 |
10.09 |
1.8 |
2.2 |
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FAQ
For motor products, the winding is the core component. Once a problem occurs with the winding, the repair cost of the motor will be very high. Among the electrical faults of motor windings, the most common faults are insulation faults to ground, turn-to-turn and three-phase motors. Relatively speaking, among these three kinds of electrical insulation faults, there is almost no possibility of repairing the inter-turn fault, that is, once the inter-turn fault occurs, the winding must be replaced.
The turn-to-turn fault is an insulation breakdown fault that occurs between turns of the motor. The more turns of the winding, the higher the probability of the turn-to-turn fault. , process improvement and other measures are taken.
For low-voltage motor products, the stator windings are mostly soft windings, that is, the scattered embedding method of enameled magnet wire is used. The number of turns of this type of winding is relatively large, and the total area of insulation between turns is relatively large. The requirements for the paint film of the magnet wire are relatively high. The thickness, uniformity, adhesion, tensile strength and torsion resistance of the magnet wire paint film. Stranding, withstand voltage, heat resistance, corrosion resistance and other properties should meet the requirements. Therefore, the selection of magnet wire with excellent performance is necessary to prevent the occurrence of inter-turn insulation faults in motor windings.
In addition to the quality compliance of the magnet wire, the quality of the motor iron core is very important, and we will not go into details about this issue here. What should be emphasized here is the degree of satisfaction of the winding processing technology. In many motor factories, the fact that there are brutal operations in the winding, embedding, wiring and shaping links can easily cause the problem of damage to the insulation of the electromagnetic wire. It is also a major factor that leads to the frequent occurrence of inter-turn faults.
Another problem is the selection of the electromagnetic wire of the variable frequency motor. Compared with the power frequency motor, the voltage applied to the variable frequency motor is not a sine wave, but an analog sine wave composed of a series of high-frequency pulse square waves, so the motor winding is always Work under steep pulse voltage, which requires the motor winding to have better anti-corona ability. thus. The use of ordinary magnet wire for variable frequency motors has certain quality risks. Many magnet wire manufacturers have also conducted special research on the use of magnet wires for variable frequency motors.
The above content mainly focuses on scattered soft windings. For the inter-turn problem, especially for large motors, the use of formed windings for low-voltage motors is also a very effective measure to avoid the inter-turn problem, including the rotor winding of wound motors. , there are many problems with soft windings, and the reliability of motors using formed windings is relatively better.
Of course, the theoretical design is closely related to the actual manufacturing process. The manufacturing process of the soft winding is relatively simple and convenient, which is one of the reasons why most data manufacturers adopt this process. However, if the formed winding is used, the ventilation and heat dissipation effect of the motor is better, and the occurrence of inter-turn faults is also less.
In addition to the processing technology of the winding, the dipping and drying process of the winding is particularly critical. This link can make up or repair some small damage to the insulation during the production and processing process, and can connect the turns to each other through the dipping paint to form a solid whole that is insulated from each other. It plays a vital role in improving the insulation performance and mechanical performance of the motor.
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