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A cooling fan frequency conversion control method and device

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

Active Publication Date: 2017-02-22
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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  • A cooling fan frequency conversion control method and device
  • A cooling fan frequency conversion control method and device
  • A cooling fan frequency conversion control method and device

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Embodiment Construction

[0023] In order to solve the problem of poor cooling effect for the main motor in the prior art and excessive power consumption. The present invention provides a frequency conversion control method and device for a cooling fan. The general idea is as follows:

[0024] The invention introduces the rotation speed of the main motor and the temperature of the motor stator into the speed control of the cooling fan, and uses the dual-loop technology of the main motor rotation speed ring and the temperature ring, so that the cooling fan can follow the rotation speed of the main motor and the temperature of the motor stator to adjust the rotation speed in real time. Therefore, the rotation speed of the cooling fan is more suitable, which realizes ultra-high-speed operation to quickly dissipate heat when the main motor temperature is too high. When the main motor temperature is not too high, it can operate at low, medium, and high speeds according to the main motor's rotation speed. Takin...

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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 present invention relates to the field of control technology, in particular to a frequency conversion control method and device for a cooling fan. Background technique [0002] At present, the main motor of the roughing flat-roll mill is driven by a three-phase AC synchronous motor, and 6 30kW cooling fans are installed on the top of each main motor to provide heat dissipation air volume to the stator winding of the main motor. During the daily operation, the cooling fans are powered by 380V / 50Hz, and are operating at full speed for the rest of the time except for maintenance. The annual operating time exceeds 8,000 hours. The average monthly power consumption of 4 cooling fans exceeds 70,000 kWh, which consumes electricity at the same time. Increase the cost of motor maintenance. [0003] It can be seen from this that the existing technical solution has a poor cooling effect on the main motor and consumes too much electric energy. Summary of the invent...

Claims

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Application Information

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Patent Type & Authority Patents(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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