Electronic commutation brushless direct current and single phase fan circuit and control method thereof

A technology of electronic commutation and AC rectification circuit, which is applied in the direction of electronic commutator, excitation or armature current control, etc., to achieve the effects of reduced winding current, quiet commutation, and reduced loss

Inactive Publication Date: 2013-08-21
HANGZHOU WEIGUANG ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One disadvantage of brushless DC motors is that

Method used

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  • Electronic commutation brushless direct current and single phase fan circuit and control method thereof
  • Electronic commutation brushless direct current and single phase fan circuit and control method thereof
  • Electronic commutation brushless direct current and single phase fan circuit and control method thereof

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. While the invention will be described in conjunction with the preferred embodiments, it will be understood that it is not intended to limit the invention to the described embodiments. On the contrary, the invention is to cover alternatives, modifications and equivalents, which may be included within the scope of the invention as defined by the appended claims.

[0022] refer to figure 1 , After the AC mains is filtered by EMC, it is rectified by diode bridge and filtered by capacitors to obtain DC power. The DC power supply voltage is 1.4 times the effective value of the commercial power, that is, in the 220V power supply, the voltage is 310V. In the controller and peripheral circuits, the power supply is usually low voltage. Therefore, it is necessary to step down the rectified low voltage. The switching power supply realizes the conversion from high...

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Abstract

The invention discloses an electronic commutation brushless direct current and single phase fan circuit and a control method thereof. The electronic commutation brushless direct current and single phase fan circuit comprises an alternating current rectifying circuit, a switching power supply, an inverting commutation circuit, rotor-position sensor, a current sampling circuit and a controller, wherein the switching power supply is used for supplying power to a motor and the switching power supply, the switching power supply is used for generating low-voltage power supply and supplying the low-voltage power supply to an external component, the inverting commutation circuit is used for controlling motor current alternation, the rotor-position sensor is used for supplying the position information of the current rotor, the current sampling circuit is used in winding current feedback, and the controller is used for fulfilling motor commutation and circuit regulation. The electronic commutation brushless direct current and single phase fan circuit and the control method thereof have the advantages that due to the fact electronic switch components are adopted, the motor is quiet and reliable in commutation processes without any mechanical movement. Due to the fact that permanent magnet rotors are adopted, the magnet winding of an ordinary direct current motor is not needed, and loss is reduced. In addition, the whole circuit and the control method of the circuit are simple and reliable, and the performance and reliability of a whole machine are improved.

Description

technical field [0001] The invention relates to a fan circuit and its realization method, more specifically, it relates to an electronically commutated brushless DC single-phase fan circuit and its control method. Background technique [0002] The brushless DC motor is relative to the traditional brushed DC motor. Traditional brushed DC motors require mechanical commutation to operate, usually by means of brushes. When the brushes commutate, due to the mechanical friction between the brushes and the rotor, the life of the brushes will be reduced, and electric sparks may be generated. The emergence of the brushless DC motor is to make up for the lack of mechanical commutation, using semiconductor switching devices to replace the mechanical commutator, and completing the commutation of the motor under the action of the controller. [0003] A brushless DC motor consists of a wound stator, a permanent magnet rotor and a control board. At present, the stator winding method mos...

Claims

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Application Information

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IPC IPC(8): H02P7/28H02P6/16
Inventor 何平
Owner HANGZHOU WEIGUANG ELECTRONICS
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