Control method, system and device for frequency converters and storage medium
A control method and control system technology, applied in the field of automatic control, can solve the problems of reducing the service life of pipelines, pipeline damage, etc.
Inactive Publication Date: 2019-04-16
SHENZHEN INVT ELECTRIC
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Problems solved by technology
Due to the slow change of water pressure, it is easy to overshoot too much, that is, the water pressure of the pipeline exceeds the target value for a long time, reducing the service life of the pipeline, and even the pipeline is damaged
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Embodiment Construction
[0037] The core of the invention is to provide a control method for the frequency converter, which can effectively control the frequency converter and reduce the overshoot of the controlled target quantity.
[0038] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0039] Please refer to figure 1 , figure 1 It is an implementation flowchart of a control method of a frequency converter in the present invention, and the method may include the following steps:
[00...
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The invention discloses a control method for frequency converters, which includes the following steps: when the feedback value of a controlled target quantity reaches a first set value, the target value of a closed-loop automatic control algorithm adopted by a frequency converter is set to the first set value; the current target value of the closed-loop automatic control algorithm is increased bya preset step n; the frequency converter is adjusted based on the closed-loop automatic control algorithm when the updated target value is not greater than a target given value F, and the method returns to the operation of updating the target value when the feedback value of the controlled target quantity is detected to be greater than a jump value, wherein the jump value is equal to the difference between the current target value of the closed-loop automatic control algorithm and a preset threshold m; and when the updated target value is greater than the target given value F, the target valueis set to the target given value F, and the frequency converter is adjusted. By using the method of the application, a frequency converter can be controlled effectively, and the overshoot of the controlled target quantity can be reduced. The application also discloses a control system and device for frequency converters and a storage medium, which have corresponding effects.
Description
technical field [0001] The invention relates to the technical field of automatic control, in particular to a control method, system, equipment and storage medium of a frequency converter. Background technique [0002] The frequency converter can adjust the frequency of the motor, thereby changing the value of the controlled target quantity. In the prior art, the closed-loop automatic control method is usually used to adjust the frequency of the motor, that is, after setting the target value of the closed-loop automatic control algorithm, the value of the controlled target quantity is finally stabilized at the given value of the closed-loop automatic control algorithm. near the target value. [0003] In the process of closed-loop automatic control, the value of the controlled target quantity will change dynamically before it tends to be stable. In some cases, the inertia of the controlled target quantity is large, which will cause too much overshoot, which is prone to equipm...
Claims
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IPC IPC(8): H02M1/00
CPCH02M1/00H02M1/0025
Inventor 石超
Owner SHENZHEN INVT ELECTRIC