1725 RPM 1750 RPM ML Series 1440 Rpm 2 HP 240V Single Phase Electric Motor
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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
People who have experience in motor testing may have a perception that when the motor is starting or stopping, many motors will always have a large vibration and noise performance. Different motors have different performance levels. For power frequency Motor, this is a specific manifestation of mechanical resonance, and for variable frequency motor, it mostly occurs during the operation of the motor, which may be serious in some frequency bands output by the inverter, or may be in the full frequency range of motor operation. .
Theoretically, if a frequency converter is used to supply power to a general motor to achieve speed regulation of the motor, the output current and voltage of the frequency converter contain a large number of high-order harmonic components, which will significantly increase the noise of the motor. In order to reduce or reduce the noise of the motor, the improvement of the inverter and the motor body should be started.
For the motor body, the balance of the air gap and the control of the electromagnetic excitation force should be started. For example, from the parts processing and motor assembly, the coaxiality between the stator part and the rotor part of the motor should be improved, and the design and dynamic balance of the rotor itself should be adopted. necessary measures, etc.
As for the frequency converter, it is mainly to suppress and reduce the high-order harmonics in the output current and voltage of the frequency converter, and to make the switching frequency multiplier beyond the frequency range that the human ear is sensitive to hearing. In practical applications, if the motor noise is large, the method of fine-tuning the switching frequency of the inverter can be used to make the switching frequency and its multiple frequency deviate from the resonance point.
What is the switching frequency of the inverter?
Simply put, the switching frequency of the inverter is chopping. Suppose we chop the sine wave into 100 segments and 1000 segments, and the combined waveform of the 1000 segments is closer to the sine wave. The higher the switching frequency of the inverter, the smoother the output waveform; the lower the switching frequency of the inverter, the worse the output waveform.
However, the chopper device of the inverter also has a life. The higher the switching frequency, the shorter the life of the inverter, and the output current and power of the inverter will be reduced; more serious.
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