Preminum Quality Ml Series 230V 50Hz 1 HP 0.75kw 1 Phase AC Motor
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Product Description
| Model |
HP |
KW |
Currnet |
Speed |
Eff |
Power Factor |
Tn |
Tmax/In |
Tst/Tn |
| ML-90S-4 |
1.5 |
1.1 |
6.76A |
1410 |
74.5% |
0.95 |
7.45 |
1.8 |
2.2 |
Company Profile
FAQ
What is the impact of the power factor of the motor on the user and the grid?
For motor products, the power factor is one of the important indicators to characterize the quality and performance of the motor. We expect the motor to have higher power factor and efficiency, lower temperature rise and noise. Of course, there is still more for motor manufacturers. Low cost and high profit.
However, the indicators pursued by customers and manufacturers are often multiple contradictions, and how to achieve the unity of contradictions is more important. Today our topic focuses on the power factor of asynchronous motors.
As one of the power and energy characteristics of the motor, the power factor refers to the ratio of the active power P absorbed from the power grid to the apparent power S. For the motor, the power factor can be commonly understood as the active current component in the stator current and The ratio of the total stator current. The higher the power factor, the larger the active current component in the total current, the more useful work the motor does, and the higher the power utilization rate, which can effectively improve the power supply capacity of power transformers and transmission lines.
Power factor is an important technical data of power system. Power factor is an important parameter to measure the efficiency of electrical equipment. A low power factor indicates that the circuit uses a large reactive power for the conversion of the alternating magnetic field, thereby reducing the utilization rate of the equipment and increasing the power supply loss of the line.
The size of the power factor is related to the load nature of the circuit. For example, the power factor of a resistive load such as a light bulb and a resistance furnace is 1. Generally, the power factor of a circuit with an inductive load is less than 1. An asynchronous motor, also called an induction motor, is a typical inductive load.
When the asynchronous motor is running under load, the input active power is used to compensate the output power and loss of the motor, while the reactive power is used to establish a rotating magnetic field and to compensate for the leakage reactance voltage drop of the motor stator.
From the perspective of motor test, the power factor needs to be calculated and obtained through the complete type test data, and it is impossible to carry out type test for all motors. How to qualitatively determine the compliance of the motor power factor from the inspection test or field use process is a problem. item is very important.
From the conceptual analysis of reactive power, the excitation current is the main component of the reactive current. The large air gap between the stator and rotor of the motor, the saturation of the iron core magnetic density, and the small number of winding turns will cause the excitation current to increase; the reactive current is the reactive current. The secondary component of , the actual fluctuation of the number of winding turns or the size of the core slot is small, and the reactance current is not much different from the design value. In the actual production process, the neatness and size deviation of the iron core, the outer diameter of the rotor turning, etc. affect the air gap of the stator and the rotor; the material of the silicon steel sheet, the quality of the iron core and the axial alignment of the stator and the rotor affect the saturation of the magnetic circuit. The machining deviation or error of the axial dimension chain of related components will also have different effects on the axial alignment. From the perspective of design and manufacturing control, the control of the production and processing process is very important on the premise of conforming to the design.
In view of the above analysis content, we can qualitatively or quantitatively judge the compliance of the power factor of the motor under no-load state. When the motor is no-load at the rated voltage, the no-load motor is slightly larger than the excitation current. If the no-load test assessment data is quantitatively calculated according to the type test data, the no-load current range should be relatively accurate. If it is determined according to the upper and lower deviation, the quality judgment is not accurate The degree is larger.
When there is a large deviation of the no-load current, the relevant links mentioned above should be checked, and if necessary, the type test should be used for quantitative determination.
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