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Cooling fan variable-frequency control method and device

A cooling fan and frequency conversion control technology, applied in the field of control, can solve the problems of excessive power consumption and poor cooling effect of the main motor, and achieve the effects of saving power, solving poor cooling effect and reasonable heat dissipation

Active Publication Date: 2015-06-03
BEIJING SHOUGANG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a cooling fan frequency conversion control method and device to solve the technical problems in the prior art that the cooling effect of the main motor is not good and consumes too much electric energy

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  • Cooling fan variable-frequency control method and device

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Embodiment Construction

[0023] In order to solve the problems in the prior art that the cooling effect for the main motor is not good and consumes too much electric energy. The present invention provides a cooling fan frequency conversion control method and device, the general idea is as follows:

[0024] The invention introduces the speed of the main motor and the temperature of the motor stator into the speed control of the cooling fan, and uses the double-loop technology of the main motor speed ring and the temperature ring, so that the cooling fan can follow the speed of the main motor and the temperature of the motor stator to adjust the speed in real time. Therefore, the speed of the cooling fan is more appropriate, and it realizes the ultra-high-speed operation to dissipate heat quickly when the temperature of the main motor is too high. Taking into account the heat dissipation requirements and reducing the power consumption of the fan, it solves the existing technical problems of poor cooling...

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Abstract

The invention discloses a cooling fan variable-frequency control method and device. The method and the device are applied to a main motor, and solve the technical problems that in the prior art, the cooling effect on the main motor is poor, and too much electric energy is consumed. The main motor comprises a motor stator and a cooling fan, wherein the cooling fan variable-frequency control device comprises a controller, the controller is used for obtaining a temperature feedback value of the motor stator and obtaining a rotating speed feedback value of the main motor, when the temperature feedback value exceeds a first preset temperature value, the operation frequency of the cooling fan is controlled to be switched to the first frequency corresponding to the temperature feedback value, when the temperature feedback value is smaller than the second preset temperature value, the operation frequency of the cooling fan is controlled to be switched to a second frequency corresponding to the rotating speed feedback value, and the first frequency is greater than the second frequency.

Description

technical field [0001] The invention relates to the field of control technology, in particular to a cooling fan frequency conversion control method and device. Background technique [0002] At present, the main motor of the rough rolling flat roll mill is driven by a three-phase AC synchronous motor, and six 30kW cooling fans are installed on the top of each main motor to provide cooling air for the stator winding of the main motor. During daily operation, the cooling fans are powered by 380V / 50Hz, and they are running at full speed except for maintenance. The annual running time exceeds 8,000 hours, and the average monthly power consumption of the four cooling fans exceeds 70,000 kWh. Increased the cost of motor maintenance. [0003] It can be seen from this that the cooling effect of the prior art solution for the main motor is not good and consumes too much electric energy. Contents of the invention [0004] The purpose of the present invention is to provide a cooling...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D23/30
Inventor 姜旭东李伟武振威周广成东占萃李晓磊于洪喜胡荣
Owner BEIJING SHOUGANG CO LTD
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