A method for automatic testing of frequency converters for water pumps and frequency converters
A technology for frequency converters and water pumps, applied in the field of frequency converters, can solve the problems of installing water level sensors, difficult debugging, increasing fault points and maintenance costs.
Active Publication Date: 2020-01-21
SHENZHEN INVT ELECTRIC
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Problems solved by technology
However, the disadvantages of the above method are: 1) Relying on the debugging experience of the debugging personnel, the debugging is difficult; 2) It is necessary to install a water level sensor, which increases the failure points and maintenance costs
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[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.
[0032] It should be understood that when used in this specification and the appended claims, the terms "comprising" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude one or Presence or addition of multiple other features, integers, steps, operations, elements, components and / or collections thereof.
[0033] see figure 1 , which is a flow chart of an automatic t...
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An embodiment of the invention discloses an automatic frequency converter testing method for a water pump and a frequency converter. Forward rotation of the water pump is controlled to correspondinglyacquire first running frequency, reverse rotation of the water pump is controlled to correspondingly acquire second running frequency, the actual running direction of the water pump is determined according to the fact whether the first running frequency and the second running frequency are upper limiting frequencies of the water pump or not, the water pump rotates along the actual running direction when meeting conditions, and the current running frequency of the water pump is acquired and serves as minimum running frequency of the water pump if current water pressure detection feedback values meet preset testing conditions. According to the automatic frequency converter testing method for the water pump, the actual running direction of the water pump can be automatically and rapidly determined, and the minimum running frequency of the water pump can be automatically tested and learned.
Description
technical field [0001] The invention relates to the technical field of frequency converter application control, in particular to a frequency converter automatic testing method for water pumps and a frequency converter. Background technique [0002] In the application of water pump water supply, in order to save energy, a frequency converter is generally used to drive the water pump to supply water. According to the principle of water pressure head, in order to ensure that the water can be pumped to a high level by the water pump, it is necessary to control the water pump to operate above a higher frequency point. If the water pump operates at a lower frequency, it will not be able to provide high-level water supply. Regarding the selection of the minimum operating frequency point of the water pump, the existing methods are mostly based on the height of the floor and the power of the water pump, and then set an empirical value of frequency to ensure that the operating frequen...
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IPC IPC(8): F04D15/00F04D29/00
CPCF04D15/00F04D15/0066F04D29/007
Inventor 石超张科孟
Owner SHENZHEN INVT ELECTRIC