How to realize speed regulation of 7.5 kW speed regulating motor?
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How to realize speed regulation for motors with large power such as 7.5kW? All friends who have 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, and a motor with large power such as 7.5kW is regulated by a frequency converter. What is the principle of frequency converter to realize speed regulation of motor?
The frequency converter is actually 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 electronic technology, AC frequency conversion technology gradually matures from theory to practice.
The 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 line, food, medical treatment, electric power and other fields.
The advantages of using frequency converter for 7.5kW speed regulating motor 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, some friends ask for a governor when consulting the speed regulating motor and 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 7.5kW motor, In this way, the frequency converter must be used to adjust the speed.
