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How does the 7.5 kW speed regulating motor realize speed regulation?

作者: 点击:454 发布时间:2022-01-04

How does a motor with a relatively large power such as 7.5 kW realize speed regulation? Anyone who has used Yongkun speed regulating motor must know that Yongkun has a micro series of speed regulating motor, which is equipped with a governor to realize speed regulation, while motors with large power such as 7.5 kW are regulated by a frequency converter. And what is the principle of frequency converter to realize speed regulation of motor?

In fact, the frequency converter is an inverter. It first changes AC into DC, and then uses electronic components to switch DC into AC. Generally, the frequency converter with large power uses thyristor, and a device with adjustable frequency is set to make the frequency adjustable within a certain range, which is used to control the number of revolutions of the motor and make the number of revolutions adjustable within a certain range. Frequency converter is widely used in the speed regulation of AC motor. Frequency conversion speed regulation technology is an important development direction of modern power transmission technology. With the development of power electronics technology, AC frequency conversion technology gradually matures from theory to practice.

Frequency converter not only has smooth speed regulation, large range, high efficiency, small starting current, stable operation, but also has obvious energy-saving effect. Therefore, AC frequency conversion speed regulation has gradually replaced the traditional slip speed regulation, pole changing speed regulation, DC speed regulation and other speed regulation systems in the past. With the development of control technology and power electronics technology, the application of frequency conversion speed regulation technology is more and more widely used in metallurgy, textile, printing and dyeing, cigarette machine production lines, food, medical treatment Electric power and other fields.

The advantages of 7.5 kW speed regulating motor with frequency converter are starting current water, adjustable acceleration and deceleration, high-speed motor, complete protection functions, etc.

It can be seen that the frequency converter plays a very important role in the motor. However, when consulting the speed regulating motor, some friends ask for a governor when the motor power is relatively large. In fact, this statement is incorrect. According to the motor regulations of yiyongkun company, the low-power speed regulating motor is equipped with a governor, while the high-power motor, such as the 7.5 kW motor, must be adjusted with a frequency converter.


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