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A current control method and device for a DC fan

A DC fan, current control technology, applied in the direction of excitation or armature current control, can solve the problems of low control accuracy, poor safety, difficult protection, etc., to achieve high control accuracy, safety and reliability assurance, protection difficulty small effect

Active Publication Date: 2018-11-23
GREE ELECTRIC APPLIANCES INC
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] In the existing technology, there are defects such as difficult protection, low control precision and poor security

Method used

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  • A current control method and device for a DC fan
  • A current control method and device for a DC fan
  • A current control method and device for a DC fan

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Embodiment Construction

[0032] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. 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.

[0033] According to an embodiment of the present invention, a current control method of a DC fan is provided, such as figure 1A flowchart illustrating an embodiment of the method of the present invention is shown. The current control method of the DC blower includes:

[0034] At step S110, the sampled current and the corresponding sampled voltage of the motor co...

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Abstract

The invention discloses a current control method and device for a direct-current draught fan. The current control method for the direct-current draught fan comprises the steps that a sampling current and corresponding sampling voltage of a motor controller in the direct-current draught fan are acquired separately; conversion is performed on the basis of the sampling current, and a voltage reference value corresponding to the maximum input power of a motor in the direct-current draught fan is obtained; the sampling voltage is compared with the voltage reference value, and the input power of the motor is controlled when the voltage reference value is smaller than the sampling voltage. According to the current control method and device for the direct-current draught fan, the defects that in the prior art, the protection difficulty is high, the control precision is low, and the safety is poor can be overcome, and the advantages of being low in protection difficulty, high in control precision and good in safety are achieved.

Description

technical field [0001] The present invention relates to the technical field of motors, in particular to a current control method and device for a DC fan. Background technique [0002] As a typical mechatronic product, brushless DC motor (BLDCM) adopts electronic commutation instead of mechanical commutation. It has the advantages of simple structure, reliable operation and convenient maintenance of AC motor. Magnetic energy product, small size and light weight motor with small electromagnetic torque fluctuation, stable speed, fast dynamic response, strong overload capacity, low loss, high power factor, high efficiency, energy saving, high reliability, etc. Due to the excellent characteristics of DC brushless motors, more and more applications have been applied in various fields (such as medical equipment, computer hardware, various mechanical power, various instruments, etc.). [0003] Household appliances such as refrigerators, air-conditioning compressors, and fans are gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P7/28
CPCH02P7/28
Inventor 李立王颜章赵瑞平李祖光
Owner GREE ELECTRIC APPLIANCES INC
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