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Outer rotor embedded automatic control constant speed DC brushless axial flow fan and constant speed control method

A technology of axial flow fans and external rotors, which is applied in pump control, mechanical equipment, non-variable pumps, etc., can solve the problems of high fan manufacturing costs, low safety factor, and low speed control accuracy, and achieve low development costs, The effect of high speed control accuracy and low manufacturing cost

Inactive Publication Date: 2015-02-25
HANGZHOU DUNLI ELECTRIC APPLIANCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the structural design of the outer rotor axial flow fan, the speed regulator is set outside the axial flow fan casing, and manual adjustment is required. Not only the use of complicated locks, the speed control accuracy is low, but also the fan manufacturing cost is high and the safety factor is high. Low

Method used

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  • Outer rotor embedded automatic control constant speed DC brushless axial flow fan and constant speed control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1: with reference to attached figure 1 . An external rotor embedded self-controlled constant-speed DC brushless axial flow fan, which includes an axial-flow fan and a DC converter, the self-controlled constant-speed detection circuit in the off-air fan, and the F / V converter in the self-controlled constant-speed detection circuit The detection head is located on one side of the outer rotor and is used to detect the rotational speed of the outer rotor. The output terminal of the inverting adder in the self-controlled constant speed detection circuit is connected to the input terminal of the power supply of the axial flow fan and is used to adjust the rotational speed of the axial flow fan. The self-controlled constant speed detection circuit is composed of an F / V converter, an inverter, an inverting adder and a reference speed control voltage circuit. The voltage signal output terminal of the F / V converter is connected to the voltage signal input terminal of t...

Embodiment 2

[0010] Embodiment 2: On the basis of Embodiment 1, a constant speed method of an external rotor embedded self-controlled constant speed brushless DC axial flow fan, the F / V converter in the self-controlled constant speed detection circuit in the axial flow fan will detect The obtained external rotor speed frequency is converted into a voltage value and input to the input terminal of the inverter. After being processed by the inverter, the output terminal of the inverter is input to the input terminal of the inverting adder, and the reverse adder converts the voltage value Compared with the reference speed control voltage, when the voltage value is less than the reference speed control voltage, the inverting adder adjusts the input voltage of the axial flow fan to the set voltage value through the quasi-speed control voltage; when the voltage value is greater than the reference speed control voltage , the inverting adder acts as a voltage divider and locks the input voltage of t...

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Abstract

The invention relates to an outer rotor embedded automatic control constant speed DC brushless axial flow fan and a constant speed control method, which can realize constant speed automatic control over the rotating speed of an outer rotor embedded axial flow fan. The outer rotor embedded automatic control constant speed DC brushless axial flow fan comprises an axial flow fan and a DC converter. An automatic control constant speed detection circuit is arranged in the axial flow fan. A detection head in a frequency-to-converter (F / V) converter in the automatic control constant speed detection circuit is positioned on one side of an outer rotor, and is used for detecting the rotating speed of the outer stator. The output end of an inverted adder in the automatic control constant speed detection circuit is connected with the power input end of the axial flow fan, and is used for adjusting the rotating speed of the axial flow fan. The outer rotor embedded automatic control constant speed DC brushless axial flow fan and the constant speed control method have the advantages of: 1, low cost of subsequent product development of a client; 2, simple use; 3, high rotating speed control accuracy; 4, low fan manufacturing cost; 5, long motor service life; and 6, high safety factor.

Description

technical field [0001] The invention relates to an external rotor embedded self-controlled constant speed DC brushless axial flow fan capable of automatically controlling the rotational speed of an external rotor embedded axial flow fan at a constant speed and a constant speed method, belonging to the field of outer rotor axial flow fan manufacturing. Background technique [0002] At present, in the structural design of the outer rotor axial flow fan, the speed regulator is set outside the axial flow fan casing, and manual adjustment is required. Not only the use of complicated locks, the speed control accuracy is low, but also the fan manufacturing cost is high and the safety factor is high. Low. Contents of the invention [0003] Design purpose: To avoid the deficiencies in the background technology, to design an external rotor embedded self-controlled constant speed DC brushless axial flow fan and a constant speed method that can automatically control the speed of the e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D27/00
Inventor 计国良孟琼华朱先茂
Owner HANGZHOU DUNLI ELECTRIC APPLIANCES
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